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Tag: sbpmat
SBPMat news: international interactions in meetings in San Francisco.
Between April 6 and 10 of the present year, professor Roberto Mendonça Faria, president of our SBPMat (the Brazil materials research society), was in San Francisco (California, USA), participating in the “2015 MRS Spring Meeting“, one of the two annual meetings of the Materials Research Society (MRS). In such occasion, representing SBPMat, professor Faria held a series of meetings.
The president, vice-president, and the executive officer of MRS, respectively, Oliver Kraft, Kristi S. Anseth, and Tood M. Osman, took part in one of them. In such meeting, the directors of both societies agreed upon the continuity of the contract that makes the MRS’ publications available to SBPMat’s members, and discussed ways of establishing collaborations between the University Chapters programs of both societies. Additionally, SBPMat’s president invited the three directors of MRS to participate in the fourteenth meeting of the Brazilian MRS.
Another meeting congregated professor Robert Chang, general secretary of International Union of Materials Research Societies (IUMRS), and professor José Alberto Giacometti, member of SBPMat Board of Counselors, in addition to professor Faria. The three professors defined that they will be co-organizers of the “Symposium U” at the XIV SBPMat Meeting, intitled “Importance of social implications of nanotechnologies in Science popularization”. The symposium already counts on two invited speakers: Guillermo Foladori, from Universidad Autónoma de Zacatecas (Mexico) and Noela Invernizzi, from Universidade Federal do Paraná (Brazil). In the meeting, professor Chang, who was plenary speaker at the XIII SBPMat Meeting, confirmed his presence in the meeting of this year.
In a third meeting, the president of SBPMat talked to representatives of Institute of Physics (IOP), and both parties manifested the desire of continuing the project of “Science Impact“, publication which, according to professor Faria, has been having an excellent repercussion.
SBPMat´s community people: interview with Fernando Galembeck.
To Fernando Galembeck, Director of the Brazilian Nanotechnology National Laboratory (LNNano) from 2011 to 2015, the interest in research started to appear during his adolescence, when, working in his father’s pharmaceutical lab, he realized the economic importance that new products, resulting from efforts in scientific research, had on the company. Currently aged 72, Fernando Galembeck, looking back at his own scientific path, can tell us several stories in which the knowledge produced by him, jointly with his collaborators, is not only transmitted through scientific papers, theses and books, but has taken form as licensed patents and new or improved products.
Galembeck received his Degree in Chemistry in 1964 from the University of São Paulo (USP). After graduating, he stayed at USP, teaching (1965 – 1980) and, simultaneously, conducting his doctoral studies in Chemistry (1965 – 1970) with a research work on the metal-metal bond dissociation. Once his doctoral studies were completed, he held post-doctoral fellowships in the United States, at the universities of Colorado, in the city of Denver (1972-1973) and California, in the city of Davis (1974), working in the field of Physical Chemistry of biological systems. In 1976, back at USP, he had the chance to create a colloids and surfaces laboratory in its Chemistry Institute. From that moment, Galembeck has been increasingly involved in the development of new materials, especially the polymeric ones, and their manufacturing processes.
In 1980, he started teaching at the University of Campinas (UNICAMP), where he became a Full Professor in 1988, position he held until his retirement in 2011. At Unicamp, he held management positions such as University Vice-Dean, as well as Director of the Institute of Chemistry and Coordinator of its graduate studies program. In July, 2011, he took over the recently created LNNano, at the Brazilian Center for Research in Energy and Materials (CNPEM).
Throughout his career, in Brazil, he held management functions at the Brazilian Academy of Sciences (ABC), Ministry of Science, Technology and Innovation (MCT), National Council for Scientific and Technological Development (CNPq), São Paulo Research Foundation (FAPESP), Brazilian Chemical Society (SBQ), Brazilian Society for the Progress of Science (SBPC) and Brazilian Society for Microscopy and Microanalysis (SBMM), among other entities.
Holder of a 1A-level fellowship for research productivity at CNPq, Galembeck is the author of almost 250 scientific paper published on international peer reviewed journals, which count with over 2,300 citations, as well as 29 deposited patents and over 20 books and chapters in books. He has advised almost 80 Master’s and Doctoral researches.
He has received numerous awards and distinctions, including the 2011 Anísio Teixeira Awards, from CAPES, the Brazilian agency for the improvement of graduate courses; the 2011 Telesio-Galilei Gold Medal, from the Telesio-Galilei Academy of Science (TGAS); the 2006 Almirante Álvaro Alberto Award for Science and Technology, from CNPq and the Conrado Wessel foundation; the 2006 José Pelúcio Ferreira Trophy, from Finep (Brazilian entity for funding of studies and projects); the 2000 Grand Cross of the National Order of Scientific Merit and the 1995 National Commendation of Scientific Merit, both from the President of the Republic of Brazil. He has also received several awards from companies and scientific and business associations, such as CPL, Petrobras, Union Carbide do Brasil, the Brazilian Paint Manufacturers Association, the Brazilian Chemical Industry Association, the Union from the Industry of Chemicals for Industrial Use from the State of Rio de Janeiro, the Brazilian Polymer Association, the Brazilian Chemical Society – which created the Fernando Galembeck Award of Technological Innovation, the Engineers Union from the State of São Paulo and the Electrostatic Society of America.
What follows is an interview with the scientist:
SBPMat Newsletter: – Tell us what led you to become a scientist and work on issues in the field of Materials.
Fernando Galembeck: – My interest in research work started during my adolescence, when I comprehended the importance of new knowledge, of discovery. I found this when I was working, after school, at my father’s pharmaceutical laboratory, as I could see how the newest, latest products, were important. I also saw how costly it was, for the lab, to depend on imported products, which were not produced in Brazil, and that in the country there was no competence to manufacture them. Then I realized the value of new knowledge, as well as the importance and the economic and strategic significance of such breakthroughs.
This feeling was increased when I took my major in Chemistry. I enrolled into the Chemistry course because one of my school teachers had suggested that I should seek a career related to research. He must have seen some inclination, some tendency of mine. So I attended the Chemistry course provided by the Philosophy School, in an environment where the research activity was very vivid. Because of that, I decided to conduct my Doctoral studies at USP. At that time, there were no regular graduate studies in Brazil yet. The advisor with whom I defended my dissertation, Professor Pawel Krumholz, was a great researcher, who also had built a very important career working on a company. He was the industrial director of Orquima, a major company by that time. That boosted my interest in research.
I worked with Chemistry for some years and my interest in materials came from a curious occurring. I was almost graduating, in my last vacations during the undergraduate studies. I was at an apartment, resting after lunch. I remember looking at the walls of this apartment and noticing that, with all I had learned in the Chemistry course, I did not have much to say about the things I could see: the paint, the coverings etc. That was Chemistry, but also Materials, and there was not much interest in Materials in the Chemistry course. Actually, Materials became very important in Chemistry mainly because of plastic and rubber, which, at the time, did not have the importance they have today. I am talking about 1964, approximately.
Well, then I started to work with Physical Chemistry, to later work a little in a field that is more oriented to Biochemistry, that is Biological Physical Chemistry and, in 1976, I received a task from the USP Department, which was to build a colloids and surfaces laboratory. One of our first projects was to modify plastic surfaces, in that case, Teflon. Then I realized that a major part of the colloids and surfaces Chemistry existed due to Materials, because the subject lends itself to create and develop new materials. From that moment on, I was getting increasingly involved with Materials, mainly polymers, a little less with ceramics, and even less with metals.
SBPMat Newsletter: – What are, in your own opinion, your main contributions to the field of Materials? Consider, in your answer, all aspects of your professional activity, including cases of knowledge transfer to the industry.
Fernando Galembeck: – I will tell the story in order, more or less. I think that the first important result in the field of Materials was exactly a technique intended to modify the surface of Teflon, that material in which it is very difficult to stick something. There is even that expression, “Teflon politicians”, the ones for which does not matter what you throw at them, they do not stick to anything. But, in certain situations, we want the Teflon to have adhesion; we want some things to stick. So, by a somewhat complicated path, I managed to see that I already knew how to modify Teflon, but I had never realized that is was important. I knew the phenomenon; I had observed it during my PhD defense. I knew that there was a change happening in Teflon. But it was during a visit to a Unilever laboratory in 1976, when I was talking to a researcher, that I saw that there were people striving to modify the surface of Teflon and achieve adhesion. Then, bringing the problem and the solution together, as soon as I returned to Brazil, I tried to see if I what I had previously observed was really useful, and it worked. That led to the first paper I wrote by myself and my first patent application, at a time when almost nobody talked about patents in Brazil, especially in the university environment. I was very enthusiastic about this: I was approached by companies that were interested in applying what I had done; one the modification in Teflon itself, the other in a different polymer. So I felt great, because I had made a discovery, I had a patent, and there were companies which, at least, would like to know what it was to see if there was a way to use it. One more thing: soon after the paper I wrote was published, I was invited to attend a conference in the United States, which addressed exactly the issue of modifying surfaces. Polymers, plastic and rubber surfaces, a subject with which I was involved for pretty much the rest of my life, up until now.
I will mention a second fact that did not have the same effects, so far. I discovered a method that enables the characterization and separation of very small particles. That was a very interesting paper. It was released, also produced a patent, but had no practical consequences. Recently, there have been some issues related to nanoparticles, which is a very important subject in Materials now, offering a chance to apply what I did over 30 years ago. The name of the technique is osmosedimentation.
Next there was some work that I did by collaborating in projects with Pirelli Cabos. With all this story of surfaces and polymers, I think I had become more or less known and was approached by Pirelli, which contracted me as a consultant and commissioned projects I had at Unicamp. An outcome of these projects, that I think is the most important, was the development of an insulator for very high voltages. This work was not only mine, but rather of a very large team, in which I took part. There were several people from Pirelli, and several from Unicamp. The result of this project was that the Brazilian Pirelli managed to be hired to provide high voltage cables for the Eurotunnel, back in the ‘80s. I think this was a very important case, as it led to a product and brought substantial economic results. I would like to stress that this was done in Brazil, by a Brazilian team. They were not a Brazilian company, but the team was based here.
Then, there were several projects with nanoparticles, at a time when we did not even call them nanoparticles; we used to call them fine particles, or simply small colloidal particles. The first paper I released on nanoparticles was in 1978. There were other things after that, which, ultimately, led to a paper on aluminum phosphate, which resulted in dissertations and papers, as well as a license by a company named Amorphic Solutions, from the Bunge group, that basically explores aluminum phosphate. The subject started at my lab, stayed there for many years, then a company of the Bunge group here in Brazil got interested, started participating, and we collaborated. That became a major development project. Later, Bunge found it infeasible to carry on with the project in Brazil and today is in the United States. I think it is a shame that they are there, but there were some other issues involved, including a disagreement with Unicamp, who holds the patents. If you check Amorphic Solutions page on the internet you may see many applications of the product. As far as I know, they are currently emphasizing its use as an anti-corrosive material to protect steel.
About the same time, in another project on nanoparticles, clay/natural rubber nanocomposites were developed. This was licensed by a Brazilian company called Orbys, which released a product called Imbrik, a product that the company provides, for example, in order to make rubber rolls for paper manufacturing.
Another case with a product. I had done a project with Oxiteno, which manufactures raw materials for latex, the surfactants. They wanted to get an ideia of how much you can change the latex changing the surfactant. I conducted a project with them that I consider one of the most interesting among those in which I have been involved. In the end, we realized that, by changing the surfactant a bit, we changed the latex a lot. These are used in paints, adhesives, resins. So we realized we had a great variability. This work was published and promoted. It did not result in a patent because it was a comprehension project. So, another company, Indústrias Químicas Taubaté (IQT) approached me to produce cationic latex, but using a new path. Cationic latex in general is made of quaternary ammonium salts, which have some environmental restrictions. The company wanted an alternative that did not have those restrictions. By the end of the project, we produced cationic latex without environmental restrictions, and the IQT put the product on the market.
There was another case that was also very interesting, even though it was canceled. Here in Brazil, there was a large manufacturer of polyethylene terephthalate, PET, which is used for many things, including bottles. They knew about the work I had done with nanocomposites, the one with Orbys I mentioned before, so they approached me wanting to produce PET nanocomposites. We had to find out how to escape from what was already patented abroad and discovered a whole new path. The company was called Rhodia-Ster, and today it is part of another Italian company, called Mossi e Ghisolfi. The company was enthusiastic and ended up patenting it in Brazil, and then later abroad. At a certain point, they decided that they would conduct the work internally, and so they did for some years. One day, my contact within the company called me to tell this: “look, we were working with two technologies; the one held by Unicamp and another one, in another country. Both are working, but the company has reached a point where it has chosen to complete the development of only one”. When coming to the final stage in developing materials, the projects costs are too high. One have to use large amounts of materials, run many tests with customers. So, the company decided to take one project further, and, unfortunately, it was not the one in which I had worked. At the end, it was a little frustrating, but I think that it was interesting, because, during this whole time, the company invested a lot in the path we had started here. Not only that, each project brings resources for the laboratory, brings money to hire people, more jobs etc. So, these projects result in many benefits, even when they are not concluded.
Now, skipping some bits, I will reach the last result, which is fairly recent, happening after I left Unicamp and came to the CNPEM. One of CNPEM’s goals is to explore renewable source materials to produce advanced materials. There is a whole philosophy behind this, based on the depletion of natural resources, sustainability… We have worked hard in order to make new things with materials derived from biomass, and the main focus is cellulose. It is the most abundant polymer in the world, but it is very hard to work with it. You cannot process cellulose as you process polyethylene, for example. One of our goals has been to find ways to laminate cellulose, i.e., work it as closely as possible to the way we use to work synthetic polymers. A recent outcome, built upon this idea, is that we managed to produce cellulose adhesives having it as the only polymer, which is new. A patent application was entered in the beginning of the year, and we are submitting a paper on it, while aiming to work with companies that are interested in the subject. We are already discussing a project for a specific application of this modified cellulose with a company.
This is the latest case. In the middle of the way, many other projects were conducted with companies, for issues of their interest. Coating something, gluing another, modifying a polymer to achieve a certain result. But these were answers to demands from companies, instead of researches started at the laboratory.
SBPMat Newsletter: – Leave a message for our readers who are starting their careers as scientists.
Fernando Galembeck: – First of all, in any chosen career, there must be a dose of passion. It does not matter if you are going to work in the Stock Market, Healthcare or whatever you may do; above all, your taste must decide. If a person chooses a career because it will give them money or status… I think it is a bad choice. If you do things with pleasure, with interest, the money, prestige and status will come from other paths. The goal is to do what makes you happy, what makes you feel good when you do it, what makes you feel accomplished. It is true not only for the scientific career, but also to any other career. In science, it is crucial.
Another point is that you must be prepared to work hard. There is no easy way. I know some young people who are constantly seeking the great idea that will bring them success with relatively little work. Well, I’d better not count on it. It may even happen, but waiting for it is almost the same as wait to win the Lottery and get rich.
I’m over 70, therefore I have met many people and seen many things happen. Something that strikes me is how young people who seemed very promising end up not working very well. Frankly, I think it is bad for youngsters to achieve success too early, because I have the impression they get used to this idea that things will always work out fine. And the problem is that there isn’t anything, anyone, any company that will always work. There will always be the moment of failure, the moment of frustration. If the person is prepared for that, when the times come, he or she will overcome it, while others are crushed – they cannot move one. That is why we must be careful not to be deceived by our success and think that, because it worked once, it will always work. You must be prepared to fight.
When I was in college, thinking about doing research seemed a very strange thing to do, crazy talk. People did not know very well what it was, or why would someone choose to do it. Some people said that research was something like priesthood. I have always worked with research, associated with teaching, consulting and, without having ever sought to become rich, I managed to have an economic status that I deem very comfortable. But I insist, my goal was to enable the development, to produce material, not the money I would receive. Money came, as it does. So, I suggest you to focus on your work, on the results and the contribution that said work may give to other people, to the environment, to the community, to the country, to knowledge. The rest comes as a bonus.
In short, my message is: work seriously, earnestly and passionately.
Finally, I would like to point out that I think the research work, the development work, really helps you to grow as a person. It will depart you from ideas that are not very fruitful and guide you towards attitudes that are really important and helpful. A student asked Galileo once: “Master, what is the method?”, and Galileo’s answer was: “The method is the doubt”. I think it is very important in the research activity, which, for Materials in particular, is especially interesting because the final product is something you can hold in your hands. In the research activity you have to always wonder, “I’m thinking like this, but is this right?”, or “This guy wrote this, but what are his bases to write it?”. This attitude is very different from the dogmatic one, which is common in the realms of politics and religion, and very different from the attitude of someone who has to deceive, as the lawyer who works for a mobster or drug dealer. The researchers have to commit themselves to the truth. Of course there are also people who call themselves researchers and spread disinformation. Some years ago, people were talking about something called “Bush science”, an expression referring to President Bush. This Bush science was the arguments fabricated by people who gained money as scientists, but who produced arguments to sustain Bush’s policies. In other words, the problem exists in science as well, but then we get back to what I said earlier. You cannot enter this field because of money, or to achieve prestige, or to be invited to have dinner with the president; you must enter this field because of your interest in the subject itself.
Featured paper: Revealing secrets of the luminescence of a lanthanide ion.
Paper: Mechanisms of optical losses inthe 5D4 and 5D3 levels in Tb3+ doped low silica calcium aluminosilicate glasses. J. F. M. dos Santos, I. A. A. Terra, N. G. C. Astrath, F. B. Guimarães, M. L. Baesso, L. A. O. Nunes and T. Catunda. J. Appl. Phys. 117, 053102 (2015). DOI: 10.1063/1.4906781.
A team of scientists from Brazilian institutions has expanded the comprehension of the mechanisms that restrict the light emission efficiency in materials doped with trivalent terbium ion (Tb³+). This ion, found in the rare earth group, subgroup of lanthanides, displays luminescent emissions from ultraviolet to infrared. Its intense green emission, with approximately 545 nm of wave length, is particularly interesting for technological purposes.
Some years ago, for instance, Japanese researchers produced laser emissions with Tb3+ doped optical fibers. However, their device displayed low efficiency, due to the saturation of its optical gain, even at low excitation levels.
Taking up this technological issue, the team of Brazilian scientists has conducted a thorough study on the processes that cause the saturation of the green emission. For that, they used Tb3+ to dope a material which, thanks to its properties, ensures high efficiency to the emission, mainly in infrared: the low silica calcium aluminosilicate glass, also known as LSCAS.
The study involved two research groups that have been collaborating for approximately two decades, the group of spectroscopy of solids from the São Carlos Institute of Physics at the São Paulo University (USP), and the photothermics group from State University of Maringá (UEM). The results were reported in a paper that appeared recently on the Journal of Applied Physics.
Firstly, glass samples with different dopant concentrations were prepared by the UEM group.
At IFSC-USP, the samples were excited using a laser at two different wavelengths, 488 nm (visible) and 325 nm (ultraviolet), and their absorption, emission and excitation spectra were obtained. Analyzing them, the scientists from the group of spectroscopy of solids observed certain particularities in the behavior of some luminescent emissions, such as a strong saturation in a green emission, similar to the one found in the laser presented by the Japanese scientists. In other wavelengths, they noted, for example, a decrease in luminescence occurring at lower excitation levels than expected. Thus, the researchers managed to conclude that the mechanism associated in the literature to the emissions from Tb3+ doped materials, also known as cross relaxation, was not enough to completely explain the behavior of the emissions or even the saturation of the green emissions, and proposed the additional action of other processes.
“Additional loss mechanisms, such as emissions by defects in the matrix, energy upconversion processes, to name a few, have a significant influence in the system we have studied”, explains Tomaz Catunda, professor at USP and corresponding author of the article. “These decay paths, previously ignored by the literature, are very important in the manufacturing of optical devices with Tb3+ doped materials”, he adds.
The study of Tb³+ doped glasses by the Brazilian team started during the Doctoral dissertation of Idelma Terra, defended in 2013 at USP, which aimed to develop materials in order to increase the efficiency of solar cells. Her work was granted the 2014 “Vale-Capes Science and Sustainability Award”. The study of these materials continued in Giselly Bianchi’s Doctoral dissertation, performed at UEM, and in the Master’s thesis of Jéssica Fabiana Mariano dos Santos, defended in 2014 at EESC-USP.
The article published on the Journal of Applied Physics has joined dozens of papers born from the collaboration between the groups of spectroscopy of solids and photothermics, in some cases also involving other scientists from Brazil and abroad, focused on the optical spectroscopy of calcium aluminate glasses doped with rare earth ions and their applications in light-emitting devices.
SBPMat newsletter. English edition. Year 2, issue 3.
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SBPMat in the organization of IUMRS’ international conference.
The Brazil Materials Research Society (SBPMat), represented by its president Roberto Mendonça Faria is part of the organizing committee of IUMRS-ICAM 2015 (14th International Conference on Advanced Materials organized by the International Union of Materials Research Societies). Particularly, professor Faria composes the international advisory board of the conference with other scientists in the world, among them, directors of Materials Research Societies of Australia, Europe (E-MRS), Japan, Singapore, and Taiwan.
The abstract submission for the conference symposia is open until May 31.
Learn more about the conference: http://www.iumrs-icam2015.org/html/index.html
SBPMat newsletter. English edition. Year 2, issue 2.
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Abstract submission is open for the 27 symposia and 2 workshops of the XIV SBPMat Meeting.
The submission of abstracts regarding the XIV Meeting of the Brazilian Materials Research Society (SBPMat) is open until May 30th. The event will be held from September 27th to October 1st in Rio de Janeiro at the convention center SulAmérica.
Works of researchers and students from Brazil and abroad in the areas of the symposia can be submitted. In this edition of the annual meeting of SBPMat, the number of symposia exceeded all the previous ones: 27 symposia and 2 workshops.
The symposia were selected by the organizing committee among the proposals received in a call launched in November 2014. According to the chairmen of the event, Marco Cremona and Fernando Lázaro Freire Junior, there were more than 50 proposals of symposia for this edition. Thus, it was impossible to put up all of them due to the limitations of time and physical space at the convention center. To select the symposia, the committee considered frontier research topics having an active community in the country.
In addition to a diverse range of themes (nanomaterials, electronics and photonics, biomaterials, modeling, materials for energy, among others), the list of symposia includes a symposium organized by the SBPMat University Chapters, coordinated by students, and two workshops organized in cooperation with industries. The list of symposia coordinators is also diverse, including researchers of universities and other research institutions from South, Southeast, and Northeast Brazilian regions, and from abroad (Argentina, Denmark, England, Germany, Italy, Ireland, Japan, Portugal, Spain, Switzerland and USA).
About SBPMat meetings
The annual SBPMat meeting is a traditional international forum dedicated to the recent progresses and perspectives in Materials science and technology. In addition to the presentation of technical works that occur in the symposia, the scientific program of the event counts on plenary lectures given by renowned researchers from worldwide. In the edition of 2014, held in the city of João Pessoa, around 2,000 works were presented in 19 symposia.
List of symposia and workshops: http://sbpmat.org.br/14encontro/symposia/?lang=en#title
Instructions for authors: http://sbpmat.org.br/14encontro/authors/?lang=en#title
SBPMat´s community people: interview with the scientist Aldo Craievich.
Along half a century devoted to research in Condensed Matter Physics, scientist Aldo Felix Craievich made important contributions to the study of structures and structural transformations in solids, by doing research in glasses (topic in which he pioneered scientific research in Brazil), paraffins, materials obtained by sol-gel and various nanomaterials. These studies resulted in more than 200 articles published in international journals with peer review, which have more than 3,600 citations.
However, the legacy of Craievich’s work for the Materials community goes beyond his scientific production. For 17 years, the scientist was one of the protagonists of the successive steps in the history of creation of the Brazilian Synchrotron Light National Laboratory (LNLS), whose research resources have impacted the Materials community, not only in Brazil but also in other countries, especially in Latin America. Craievich also focused intensely on the training of users of synchrotron light in courses offered in several Latin American countries and in ten schools he directed and in which he participated as a lecturer at the International Center for Theoretical Physics (ICTP) in Trieste, Italy.
Born in the inlands of the province of Santa Fe, Argentina, Craievich graduated at undergraduate and PhD level in Physics from the prestigious Balseiro Institute, located in the Argentine city of Bariloche, having developed his doctoral research work in France at the Laboratoire de Physique des Solides of the Université Paris-Sud, under the supervision of André Guinier, one of the greatest exponents of crystallography and characterization techniques by X-ray of the twentieth century.
Craievich began working in Brazil in 1973, year when he took over teaching and research functions at the São Carlos Institute of Physics and Chemistry (IFQSC) at University of São Paulo (USP), at the invitation of Yvonne Mascarenhas. In 1976 he returned to Laboratoire de Physique des Solides to take a one-year post-doctoral internship, returning to IFQSC afterwards. In 1980 he moved to Rio de Janeiro to work as a researcher at the Brazilian Center for Research in Physics (CBPF), a position in which he remained until 1986. In 1981 he took a second postdoctoral internship in France, this time at the National Center of Synchrotron Light LURE – laboratory he frequently attended for shorter periods thereafter. Thus, when he took over the coordination of the executive committee of the project aiming to create a synchrotron light laboratory in Brazil, Aldo Craievich was one of the rare scientists (there would be two nationwide) who had experience in using such light source.
In 1987, he returned to the state of São Paulo. Until 1997, he led planning, design and construction of the first seven LNLS beamlines in the city of Campinas and has developed a comprehensive training program for new users. Simultaneously, from 1987 on, Craievich taught at the Institute of Physics at USP, in the city of São Paulo and, in 1997, he devoted himself full time to his position as a Professor at that institution, where he was head of the department of Applied Physics between 2002 and 2006.
Aldo Craievich also participated in the creation of our SBPMat (Brazilian MRS) from the first meetings and electronic message exchanges, which occurred in 2000. In addition, his name is among the scientists who made up the “interdisciplinary committee of Materials”, responsible for preparing the statutes of SBPMat.
Among other distinctions, Craievich received honors granted by the LNLS user community and team (1997 and 2010), by the Brazilian Society of Crystallography (2000), by the Balseiro Institute (2011) and by the Asociación Argentina de Crystallography (2014). He received the Mercosur Award for Science and Technology both in 2004 and in 2010, for his part in research on topics “Energy for Mercosur” and “Nanotechnology for Mercosur”, respectively. He has been a member of the São Paulo State Academy of Sciences (ACIESP) since 1980. In December 2014, he was elected member of the Brazilian Academy of Sciences (ABC).
Currently at 75 years of age and already retired, Aldo Craievich continues to conduct research activities in IFUSP while a senior professor and 1A researcher at CNPq, the Brazilian National Council for Scientific and Technological Development. He is also member of the Support Nucleus for Research in Nanotechnology and Nanoscience (NAP-NN) at USP and member of the editorial board of several scientific journals; among which the Journal of Synchrotron Radiation (IUCr, Chester, UK), in which he acts as a co-editor.
Below you will find an interview with the researcher.
SBPMat Newsletter: – When did you become interested in science?
Aldo Craievich: – I started my university studies at National University of Cordoba, Argentina, in March 1959, making my way into the aeronautical engineering career. During my first years at the university, I had to split my time between study and my work in the State Aeronautical and Mechanical Industries (IAME). My choice in Aeronautical Engineering was due to the relationship between the career and the area of my work at IAME, where I wished to continue my activities after my graduation. However, limitations to my availability, due to my work activities, made me realize that the quality and the pace of progress of my university studies were unsatisfactory.
After completing two years of aeronautical engineering in March 1961, I accidentally read a poster that mentioned the opening of an entry exam for a course offered by the Institute of Physics of São Carlos de Bariloche in Argentina (today Balseiro Institute). One of the requirements for entry, which I met, was to be approved in sophomore year of studies in Physics or Engineering. I was particularly interested in this possibility, mainly because of the Balseiro Institute, which, in addition to offering education of excellent quality, granted full scholarships for all its undergraduate students. Without thinking much about it, I took the entry exam and was approved. Thus, from August 1961 until December 1964 I completed my bachelor’s degree in physics at the Balseiro Institute. In this Institute I had, in fact, the possibility to devote myself exclusively to study in an appropriate environment and without dividing my attention to other concerns.
My real interest in science arose shortly after I joined the Balseiro Institute. During the basic part of my studies in this Institute, I had several professors of singular quality, including José Balseiro (founder and dean of the Institute), Enrique Gaviola (Argentine experimental physicist of international prestige) and Guido Beck (Austrian renowned theoretical physicist). Balseiro had a selfless, enthusiastic and efficient performance as a dean and professor, and exerted a strong influence on his colleagues and students, as well as on subsequent generations of the Institute. In spite of the fact that the period of my interaction with Balseiro was brief (he died in March 1962), it was enough for me to realize the importance of Physics. Today I think that my interaction with exemplary professors I had during my early years in the Balseiro Institute, was what sparked my interest in science, which continues today.
SBPMat Newsletter: – What led you to become a scientist and work in the Materials area, more precisely in Condensed Matter Physics?
Aldo Craievich: – During the final phase of my studies in physics in Balseiro Institute, I began to reflect on the kind of specific research area towards which I should guide my professional future. At this time of doubt I took the advice of Conrado Varotto, later founder of company INVAP (spin-off of the Balseiro Institute) and now executive director of the Argentine National Commission on Space Activities (CONAE), who told me to make my final graduation work on structural and electronic properties of metal alloys. Soon after graduating from Balseiro Institute, I joined the Institute of Mathematics, Astronomy and Physics (IMAF after FaMAF) of the National University of Cordoba, Argentina, as a teaching assistant, in March 1965. My initial intention was to work in an experimental subject of Condensed Matter Physics, without yet having decided the specific area. Knowing of my interest, the IMAF director, Alberto Maiztegui, suggested I deployed an X-ray laboratory for materials research using a previously purchased diffractometer. At that time I received the support of Alberto Bonfiglioli, a researcher at the National Atomic Energy Committee of Buenos Aires. Bonfiglioli suggested I initially completed my basic training in the area, doing my doctoral thesis at Laboratoire de Physique des Solides of Université Paris Sud, in Orsay, France, under the supervision of the eminent Professor André Guinier. Guinier was one of the creators and director of that laboratory and author of pioneering research on the link between the structure of imperfect solids and characteristics of the diffuse scattering of X-rays. He was also a pioneer in applying the technique of spreading X-rays at small angle (SAXS) to the study of materials, one of the discoverers of the known Guinier-Preston zones in aluminum alloys and author of many classic books in this research area.
In short, my interest in research in the area of materials, specifically for studies of the structure and transformations in condensed matter, first appeared during my final graduation paper at Balseiro Institute supervised by C. Varotto, and increased with my first activities in IMAF in collaboration with A. Bonfiglioli and consolidated during my doctoral thesis in France under the guidance of A. Guinier.
SBPMat Newsletter: – And why did you come to Brazil?
Aldo Craievich: – In 1969, after my return from France and recent PhD, I started the implementation of the X-Ray Laboratory at IMAF in Cordoba, Argentina, in order to apply the techniques of X-ray diffraction and SAXS in studies on glassy materials. After several years of work and having already obtained some results, I realized that the development of the laboratory occurred more slowly than I expected. The reasons were many, including, financial difficulties to acquire equipment and excessive involvement in administrative activities, which significantly reduced my time for research. So, at the end of 1971 I decided to do a post-doctoral internship abroad to be able to focus for a while on my research.
At the same time, at a meeting of the Chilean Physics Society held in Valdivia, Chile, in January 1972, I had my first contact with Yvonne Mascarenhas, a professor at the São Carlos Institute of Physics and Chemistry (IFQSC/USP today IFSC/USP), in the city of São Carlos, who invited me to undergo a one-year internship in her Crystallography Laboratory. I accepted the invitation and, in March 1973, I began my research and teaching tasks in IFQSC. The Crystallography Laboratory had, at that time, an X-ray diffractometer operating for polycrystals studies and a SAXS equipment, which had been recently acquired. What was expected of me, in addition to performing teaching tasks, was to install the new SAXS apparatus and start lines of research in topics of my own interest and in collaboration with other local scientists.
After starting my internship in Brazil, the general political situation in Argentina and particularly the conditions for teaching and research in universities were deteriorating, which induced me to extend my temporary stage at IFQSC several times. Later, in my several visits to Argentina during the late 1970s, I realized a further decline and also a disturbing political and social situation. These findings and, on the other hand, the interesting new challenges presented in IFQSC and the strong support received from the local community and development agencies (FAPESP and CNPq), led me to decide to turn my temporary stage into a permanent transfer. I realized then that I had found the necessary and promising basic conditions in Brazil in order for me to do a good job in research.
SBPMat Newsletter: – What, in your consideration, are your main contributions to the Materials area? Consider all aspects of your work.
Aldo Craievich: The main research I developed from 1965 until today can be classified into five major lines I describe below (I mention some relevant references associated with each line of work).
(i) Nanophase separation in glassy solids
After my transfer to Brazil in 1973 I began experimental studies through the SAXS technique to determine the mechanisms responsible for the early stages of the isothermal process of nanophase separation in B2O3-PbO-Al2O3 glass. Thus, I continued the line of research I had started in IMAF in Argentina. In order to interpret the results I used a thermodynamic model proposed by John Cahn, called spinodal decomposition, for systems corresponding to the core of the gap of miscibility, and the classical model of nucleation and growth for compositions and temperatures close to the binodal border. I observed, in particular, the existence of a systematic deviation between the experimental SAXS results with respect to predictions of the Cahn model, which assigns a relaxation effect of initial stresses in the glass matrix produced by the primary process of quenching. As a result of this research, I wrote the first two articles published in indexed journals related to research on glassy materials held in Brazil [Craievich, Phys.Chem.Glasses 16, 133 (1975); Craievich, Phys.Stat.Sol. 28, 09 (1975)].
I also noticed that the model of spinodal decomposition does not adequately describe the stages of nanophase separation in glass system B2O3-PbO-Al2O3. Then a comparison was made of the results of SAXS experiments I conducted in IFQSC in 1973/74, related to advanced stages of the process, with the predictions of the new statistical theory developed by Joel Lebowitz et al. at the end of the 1970s. The results led to an article I’ve written in collaboration with Juan M. Sanchez (former student of IMAF and today vice president for research at Texas University) in which we demonstrated, for the first time, quantitatively for glassy materials, the time evolution of the experimental structure function shows the properties of dynamic range predicted by the theory [Craievich and Sanchez, Phys.Rev.Lett. 47, 1308 (1981)].
(ii) Structure and phase transitions in molecular crystals
Back to IFQSC of São Carlos in 1977 after completing a postdoctoral internship in France, I worked in collaboration with Jean Doucet of the Laboratoire de Physique des Solides,in Orsay, France, and a doctoral student in systematic studies of structures and of phase transition from a set of wax crystals composed of linear molecules CnH2n+2.All studied paraffins show a structure formed by stacking layers of molecules CnH2n+2, with their major axes parallel and lateral compact packaging. We associated the characteristics of thermal expansion and the phase transitions of these solids to variations of amplitude of linear molecule release around its main axis. As a result of this research, we published, in a few years, more than 10 articles, all of which received a high number of citations. In particular, one on the “rotary” phase studies observed in three paraffins with n = 17, 19, 21, which received 209 citations so far [Doucet et al, J. Chem.Phys. 75, 1523 (1981)].
(iii) Nanomaterial formation processes by the sol-gel method
During the 1980s I did a lot of research in situ on structural changes through the use of SAXS line associated with the French synchrotron light source (LURE). I am particularly interested in structural changes that occur during the new process, called the sol-gel, to obtain nanostructured materials. This complex process consists of a sequence of steps, which starts from a precursor in the colloidal form of liquid solution, continues with the aggregation of colloidal particles and subsequent sol-gel transition to be possibly completed by drying and sintering the resultant nanoporous material.
I conducted the first studies on this line in collaboration with research groups led by Jerzy Zarzycki (Laboratoire de Verres du CNRS, Université de Montpellier, France) and André Aegerter (IFQSC-São Carlos). Most of these experimental studies aimed to examine the process kinetics analysis and were done using the SAXS technique in situ [Lours et al J.Non-Cryst.Solids 100, 207 (1988)]. This was achieved by using a SAXS line associated with a synchrotron light source of high intensity, allowing measurements with high temporal resolution. In several cases, we use new concepts of fractal geometry to achieve the accurate characterization of the structures, which allowed us to clearly identify the mechanisms of aggregation.
During the 1990s, I continued my studies of the structures of various nanomaterials and sol-gel type processes with the participation of Luis Esquivias and colleagues (University of Cadiz, Spain), and with the researchers of the group led by Celso Santilli (UNESP-Araraquara). With the group of Luis Esquivias we worked on various topics, with emphasis on research of the influence of the controlled use of ultrasound on the structural characteristics of final sonogels. With Celso Santilli and his group, we researched a number of nanomaterials, through studies of SAXS in situ, which contributed in particular to a better understanding of the structure, mechanisms of formation and relations with the properties of various types of organic-inorganic hybrid nanocomposites [Dahmouche et al, J.Phys.Chem. B 103, 4937 (1999)].
(iv) Proteins in solution
I have participated, since the 1980s, in numerous collaborations on structural studies of proteins in solution. Particularly, I collaborated on a study of the tertiary structure of albumin, which turned out to be the first published research with experimental results obtained exclusively at LNLS [Castelletto et al, J. Chem.Phys. 109, 2825 (1998)]. Later, we published a paper on the variation of the average density of proteins with molecular mass, which, in the literature, was being considered invariant [Fischer et al, Protein Sci. 13, 2825 (2004)]. This article had for a decade more than 200 citations in literature. More recently, we have developed a new method of determining the molecular mass of proteins in solution using exclusively SAXS experiment results on relative scale [Fischer et al, J.Appl.Cryst. 43, 101 (2010)].
(v) Structure and stability of phases of metal nanoparticles and solid solutions of nanostructured oxides
During the last decade I participated in a number of studies on the structure, mechanisms of formation and stability of phases of several nanomaterials, in collaboration with several research groups.
With Guinther Kellerman, one of my thesis students and now a professor at UFPR, we published several pioneering papers on the mechanisms of formation of Bi and Ag nanoparticles on glassy matrix and the relationship between the size of Bi nanoparticles and their melting and crystallization temperatures. The experimental results were also quantitatively compared with corresponding theoretical predictions [Kellermann and Craievich, Phys.Rev. B 78, 054106 (2008)].
In collaboration with Felix Requejo and his group from Universidad Nacional de La Plata, Argentina, we researched various structural features of noble metal nanoparticles supported on porous matrices [Giovanetti et al, Small 8, 468 (2012)] and, more recently, arrangements of nanoplates of CoSi2 buried and consistent within a monocrystalline Si substrate.
With Diego Lamas of the Universidad Nacional de San Martín, Argentina, and members of his group, we conducted a series of studies of solid solutions of nanostructured oxides. In the particular case of zirconia-escandia nanostructured system, we demonstrated that it is possible to maintain ambient temperature, phases of the tetragonal and cubic structure with interesting properties, which are stable only at high temperature in these materials when composed of micro or macroscopic crystals [Abdallah et al , RSC Adv. 2, 5205 (2012)].
b. Participation in the creation and management of a research institution
In late 1986 I was appointed deputy dean and head of the scientific department of the Brazilian Synchrotron Light National Laboratory (LNLS) in Campinas. At that time the dean and the head of the LNLS project were Cylon Gonçalves da Silva and Ricardo Rodríguez, respectively. In 1987 the building of a synchrotron light source began in LNLS, comprised of a linear accelerator 120 MeV electrons, an electron storage ring (UVX) of 1.37 GeV and a set of beamlines.
During my tenure at LNLS I was responsible for the design of the first seven beamlines of the LNLS, which were developed in parallel with the construction of the linear accelerator and storage ring. I also made a persistent effort to promote the training of future users of LNLS, organizing numerous events (short courses, workshops etc.) in which several specialists (mainly foreign researchers) gave talks and/or participated in training sessions.
In addition to the administrative and technical tasks associated with my duties as deputy dean, I continued conducting experimental research for periods of one to two weeks a year in the LURE synchrotron light laboratory, in France. The first-hand knowledge acquired in these internships abroad was useful for my work related to the planning and construction of the first LNLS beamlines.
The construction phase of the UVX source and the first set of beamlines ended during the first half of 1997 [Rodrigues et al, J.Synchr.Rad. 5, 1157 (1998)] and were then opened for use by the scientific community.
When the synchrotron light source was completed in July 1997, I felt that the time had come for me to resign from my job of deputy dean of the LNLS and continue my work with exclusive dedication in the Institute of Physics, from 1998 on. I considered that this way I could continue my activities as a user researcher of the light source and also contribute more directly to the education of students and the growth of the LNLS user community.
c. Participation in the creation of research groups and laboratories
During my 50 years of teaching and research activities, I worked successively in five institutions: IMAF/UNC in Argentina (1965-1972), IFQSC/USP in São Carlos (1973-1980), CBPF in Rio de Janeiro (1981-1986), LNLS in Campinas (1987-1997) and IF/USP in São Paulo (1998 -…). My contributions to the creation and development groups and lines of research in these institutions are succinctly set out below.
(i) IMAF (Cordoba, Argentina): I created and organized at IMAF its first x-ray laboratory, started a new line of research on phase separation of glassy solids and contributed to the education of young students in the Materials Science area. I published in 1973 the first article in collaboration on the structure of a glassy material associated with research conducted in IMAF.
(ii) IFQSC/USP (São Carlos): I implemented in IFQSC, in 1973, the first SAXS laboratory operating in Brazil. That same year I started a line of research on glassy materials that was strongly developed later on by the main action of Edgar Zanotto (now head of LaMaV at UFSCar, São Carlos), who I advised in his master’s thesis. Finally, in collaboration with Yvonne Mascarenhas and a graduate student, we completed, in 1984, pioneering structural studies of proteins in solution made by using SAXS.
(iii) CBPF (Rio de Janeiro): I implemented the first X-ray laboratory at CBPF comprised of a diffractometer of polycrystalline and a SAXS chamber. My main activity in CBPF during the period 1981-86 was participating in feasibility studies, diffusion activities and discussion sessions that led to the creation, in 1986, of the Brazilian Synchrotron Light National Laboratory.
(iv) LNLS (Campinas): During my work at LNLS, in addition to carrying out the activities associated with the construction of the synchrotron light source described above, I promoted and coordinated one of the projects of the first series approved in 1996 by the Support Program for Nuclei of Excellence (PRONEX) of CNPq. In this project on “Research and structural and magnetic characterization of materials”, 22 researchers/professors of LNLS, IF/USP, IF/UNICAMP, IQ/UNESP and DF/UFPR participated.
(v) IFUSP (São Paulo): I contributed to the consolidation of the Crystallography Laboratory of IFUSP, primarily through my participation in the project planning and in the incorporation of a new state-of-the-art SAXS apparatus with a spot section beam. This apparatus allows studies of SAXS and GISAXS at room temperature and at high temperatures with automated data collection. This was the first modern equipment in operation in Brazil and probably also in Latin America.
d. Contribution in science policy
After performing a sabbatical internship in the LURE synchrotron light laboratory, in Orsay, France, back to CBPF in 1982, I participated in meetings of a small group of researchers who discussed the possible feasibility of building a source of synchrotron light in Brazil. That same year, the president of CNPq after expressing hid support for the initiative, decided to create Project Synchrotron Radiation (PRS/CNPq) coordinated by the director of the CBPF, Roberto Lobo. In the context of this project I worked as coordinator of the Executive Committee and member of the Technical Scientific Council (CTC). In my role of coordinator of the Executive Committee, I organized meetings, lectures and visits of foreign experts. I also collaborated in the development of a first conceptual project of a source of synchrotron radiation and participated in the drafting of a proposed master plan for its implementation. Details of the work performed were exposed in the article “Proposta preliminar de estudo de viabilidade de um Laboratório Nacional de Radiação Síncrotron” [Lobo et al, CBPF / PRS 1 (1983)] and in report “PRS: Atividades e Perspectivas” [Craievich, CBPF / PRS 14 (1984)]. I also coordinated a CNPq scholarship program that allowed young Brazilians to access for the first time sources of synchrotron light abroad and, thus, gain experience in their use.
In the period 1983-1985, I presented in Argentina the project of the Brazilian synchrotron, at the Balseiro Institute of Bariloche, in the CNEA of Constituyentes, at a meeting of the Argentina Physics Association (AFA) in La Plata and at the Latin American Symposium of Physics on Solid State (SLAFES ) in Mar del Plata.
On the other hand, I participated in the phase of foundation of two new scientific organizations: the Brazilian Society for Materials Research (SBPMat) in 2000, which, so far, held thirteen annual meetings, and the Latin American network Materia, which promoted, since 1995, twelve scientific meetings in eight different countries in Latin America.
e. Training of new scientists
From 1965 to 2009 I taught several undergraduate and graduate courses in the various institutions of Argentina and Brazil where I worked. On the other hand, from 1982 to today, I participated in short courses, schools and training workshops for synchrotron light users in several cities of Brazil, Argentina, Chile, Uruguay, Peru, Colombia, Venezuela, Cuba and Mexico. I also contributed to the education of synchrotron light users outside Latin America, acting as coordinator and professor of a number of schools on applications of synchrotron radiation organized by the International Centre for Theoretical Physics (ICTP) in Trieste, Italy. This activity in the ICTP lasted for almost 20 years, in a total of ten successive schools, four weeks each, held biannually from 1991 to 2008.
On the other hand, I advised 18 post-graduate students (nine masters´ and nine doctoral students). Most of my former advisees continued acting as researchers and professors in various universities in the states of São Paulo, Bahia and Paraná, and research centers in Rio de Janeiro and São Paulo. One of them works in an industrial company in the state of São Paulo and the other, of French origin, who I co-advised along with a researcher at Université Paris V, works in an industrial research laboratory in Belgium. I still maintain collaborations with two of my former advisees in research of structural properties and nanomaterials phase transitions and studies by SAXS proteins and other macromolecules in solution.
SBPMat Newsletter: – What led you to take part in the history of the Brazilian Synchrotron Light National Laboratory (LNLS)?
Aldo Craievich: – In 1981, having already joined the CBPF (the Brazilian Center for Research in Physics), in Rio de Janeiro, I decided to spend a sabbatical year in the LURE (Laboratory for the Use of Electromagnetic Radiation) synchrotron light laboratory, in Orsay, France. What interested me about this scholarship was the chance to have access to a new kind of experimental instrumentation, which allowed me to conduct researches of my own interest, impossible in classical laboratories, such as in situ kinetic studies on rapid structural variations in glass materials at high temperatures.
Once I completed my sabbatical year at LURE and had already returned to CBPF, in September 1982 I was invited by the CBPF Director to participate in formal activities aiming the future construction of the synchrotron light source in Brazil. What led me to take part in the preliminary work of this project at CBPF, then in the LNLS, during the construction stages of the light source, was a conjunction of reasons. I took into account that (i) the eventual future local availability of a synchrotron light source would be greatly relevant for the scientific development of Brazil, (ii) having a synchrotron available in Brazil would be particularly useful for the advance of the research lines I had in progress, and (iii) I had already acquired, back in 1982, the capacity and expertise required to actively participate in the proposed tasks.
SBPMat Newsletter: – Leave a message for our readers who are starting their careers as scientists.
Aldo Craievich: I believe that a necessary and important condition for being a good scientist in the area in which I work is to have a strong interest in understanding and trying to explain the essential nature and the relevant properties of matter around us. So my first message is to encourage young students who have this kind of interest to pursue scientific careers.
Studies that transform a young student in a good scientist depend less on the nature of specific topics and more on how new knowledge is acquired and presented. The student and the teacher should consider each new subject of study a challenge to be faced. On the other hand, the student should value the hard work of teachers who present each new theme aiming at deep understanding, preventing easy paths. In this sense my second message to young students is to, as far as possible, seek the teachings, advice and guidance of teachers not only those outstanding, but also demanding.
The personal contributions of every researcher to the progress of science should be considered by them in general as relatively modest. My third message is related to an important quality, which, in my opinion, every new researcher and also those with greater experience should have: a permanent attitude of respect for other people’s work. A very clear message on this subject was mentioned by Balseiro, dean of the Physics Institute where I did my undergraduate studies, in his speech to the graduate students in the first class of this institute in 1958. He said “I do not think there is a more pathetic index of lack of culture, except violence, than the lack of respect for other people’s work. This lack of respect is a form of destruction and who destroys other people’s work can be described as savage, that is, the lack of culture in its most pristine form” [http://www.ib.edu.ar/index.php/historia-del-ib/primera-graduacion.html].
To learn more about Professor Aldo Craievich: “Un físico del Mercosur” published by “Ciencia e Investigación.Reseñas”, tomo 1, no 3, available at: http://aargentinapciencias.org/images/stories/R-tomo1-3/RevRes-1-3xArt/7a24Craievich-ceiRes-1-3.pdf (in Spanish).
First SBPMat University Chapter in the northern region of Brazil.
The University Chapter (UC) program of the Brazilian Materials Research Society (SBPMat) now has a unit in northern Brazil, more precisely in the city of Belém, capital of state of Pará, in the Federal University of Pará (UFPA). Seventeen undergraduate and graduate students engaged in research on Materials Science, as well as two tutors, take part in this UC.
“When we learned what the University Chapter program was, we realized that participating would provide us with a unique opportunity to have contact with other students in the field and thereby increase our exchange of experiences with pupils from other institutions which, just as us, work in Materials research”, says the president of the UC, doctoral student Gregório Barbosa Corrêa Júnior. According to him, as from this year, the UC will hold events such as workshops and courses. “We also expect to acquire a global perspective on what is our branch of scientific research and, with that, have a firm grasp of the opportunities and professional prospects offered by the field”, he concludes.
Learn more about the SBPMat University Chapters program and its six units so far, in the States of Minas Gerais, Pará, Piauí, Rio Grande do Sul and São Paulo: http://sbpmat.org.br/en/university-chapters/