Sócio da SBPMat é distinguido com título de Professor Honoris Causa da UFC.


Prof. Oswaldo Luiz Alves
Prof. Oswaldo Luiz Alves

O professor Oswaldo Luiz Alves (IQ – UNICAMP), sócio da SBPMat, foi agraciado com o título de Professor Honoris Causa da Universidade Federal do Ceará (UFC). O título lhe foi outorgado pelo Conselho Universitário da instituição no dia 17 de dezembro de 2018. Além de ser professor titular da UNICAMP, Alves é docente colaborador do Programa de Pós-Graduação em Física da UFC há mais de 30 anos.

Em outubro de 2018, o professor Alves recebeu mais uma importante distinção, a admissão na Ordem Nacional do Mérito Científico na classe Grã-Cruz.

Sócios da SBPMat são autores de livro sobre Teoria do Funcional da Densidade.


Prof Sérgio Ricardo de Lázaro (esquerda) e Luis Henrique da Silveira Lacerda.
Prof Sérgio Ricardo de Lázaro (esquerda) e Luis Henrique da Silveira Lacerda.

Os sócios da SBPMat Sérgio Ricardo de Lázaro (professor da UEPG) e Luis Henrique da Silveira Lacerda (doutorando no UEL/UEPG/UNICENTRO) são autores do livro “Teoria do Funcional da Densidade e Propriedades dos Materiais”, publicado pela editora CRV. O livro tem coautoria de Renan Augusto Pontes Ribeiro, também doutorando do programa. A Teoria do Funcional da Densidade é baseada na Mecânica Quântica e foi aplicada na área de Química de Materiais.

Boletim da SBPMat – 75ª edição.


 

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Boletim da
Sociedade Brasileira
de Pesquisa em Materiais

Edição nº 75. 30 de novembro de 2018.
Artigo em Destaque

Experimentos realizados com pontos quânticos por cientistas da Unicamp revelaram uma situação na estrutura de bandas de energia dessas nanopartículas que nunca antes tinha sido observada em nenhum material. O estudo foi reportado na Nano Letters. Saiba mais.

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Cientista em Destaque

Entrevistamos Heinz von Seggern, professor da TU Darmstadt e ex-pesquisador da Bell Labs e da Siemens. Este destacado cientista alemão, cujas contribuições vão da pesquisa fundamental até a invenção de dispositivos, tem um histórico de interações com a comunidade brasileira de materiais, inclusive com o pioneiro Bernhard Gross. Saiba mais.

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Novidades dos Sócios SBPMat

  • O sócio Valmor Roberto Mastelaro (IFSC-USP) assumiu como editor do Journal of Alloys and Compounds. Saiba mais.

  • O sócio fundador Fernando Galembeck (Unicamp) ganha prêmio do Instituto Nanocell na área de Nanotecnologia. Saiba mais.

XVIII B-MRS Meeting/ Encontro da SBPMat
(Balneário Camboriú, SC, 22 a 26 de setembro de 2019)

Simpósios. Um grande número de propostas de simpósio foi recebido pela organização do evento. Em breve, será divulgada a lista dos simpósios aprovados.

Submissão de trabalhos. O cronograma para submissão de trabalhos será divulgado em breve.

Palestras plenárias e palestra memorial. Saiba quais serão as palestras plenárias desta edição do evento e quem proferirá a tradicional Palestra Memorial Joaquim da Costa Ribeiro. Veja aqui.

Organização. O chair do evento é o professor Ivan Helmuth Bechtold (Departmento de Física da UFSC) e o co-chair é o professor Hugo Gallardo (Departmento de Química da UFSC).

Expositores e patrocinadores. Empresas interessadas em participar do evento podem entrar em contato com Alexandre no e-mail comercial@sbpmat.org.br.

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Dicas de Leitura

  • Depois de compreender a relação entre microestrutura e propriedades em superliga metálica, cientistas aplicam tratamento que deixa esse material ainda mais forte e resistente a altas temperaturas, possibilitando seu uso em geradores elétricos e reatores nucleares (paper da Science Advances). Saiba mais.

  • Cientistas acham evidência experimental de que material bidimensional CrI3 pode se comportar como isolante topológico magnético sem ter campo magnético externo, e apontam possibilidade de uso do material em spintrônica (paper do Physical Review X). Saiba mais.

  • Inspirado nas folhas das plantas, polímero com rede de microcanais pelos quais circulam fluidos regula a própria temperatura e gera energia termoelétrica, prometendo aplicações em saúde, construção civil, indústria aeroespacial e mais (paper da Scientific Reports). Saiba mais.

  • Cientistas desenvolvem ferramenta de microscopia eletrônica de transmissão que permite estudar a interação de luz e matéria em partículas individuais, na escala nano, em tempo real e com alta resolução (paper da Scientific Reports). Saiba mais.

Oportunidades

  • Bolsas Fapesp para doutorado direto em Eletroquímica Ambiental. Saiba mais.

  • Inscrições para o mestrado e doutorado em Nanotecnologia da COPPE/UFRJ. Saiba mais.

  • Bolsa Fapesp para pós-doutorado no IQSC da USP. Saiba mais.

  • Bolsa PNPD/CAPES para pós-doutorado no POSMAT da Unesp. Saiba mais.

  • Pós-doutorado no PPGCEM da UFRN. Saiba mais.
  • Pós-Doutorado em perovskitas de haleto na UFABC com bolsa FAPESP. Saiba mais.

  • Seleção de professores visitantes e visitantes estrangeiros na Universidade Federal da Integração Latino-Americana (UNILA). Saiba mais.
  • Seleção de professores pesquisadores para o PPGCEM – UNESC. Saiba mais.

Eventos

  • 3rd International Brazilian Conference on Tribology (TriboBR 2018). Florianópolis, SC (Brasil). 3 a 5 de dezembro de 2018. Site.

  • III Workshop on Environmental Nanotechnology e I Festival de Química. Sorocaba, SP (Brasil). 5 a 8 de dezembro de 2018. Site.

  • II Simpósio Nacional de Nanobiotecnologia (IISNNB). São Bernardo do Campo, SP (Brasil). 6 e 7 de dezembro de 2018. Site.
  • VII Curso de Análise de Minerais/Minérios pelas Técnicas de DRX e FRX. Fortaleza, CE (Brasil). 10 a 14 de dezembro de 2018. Site.

  • International Workshop on Advanced Magnetic Oxides (IWAMO 2019). Aveiro (Portugal). 15 a 17 de abril de 2019. Site.

  • 2019 E-MRS Spring Meeting e IUMRS – ICAM. Nice (França). 27 a 31 de maio de 2019. Site.

Siga-nos nas redes sociais

Você pode divulgar novidades, oportunidades, eventos ou dicas de leitura da área de Materiais, e sugerir papers, pessoas e temas para as seções do boletim. Escreva para comunicacao@sbpmat.org.br.
 

 

 

Featured scientist: Prof. Heinz von Seggern (TU Darmstadt).


Prof. Heinz von Seggern.
Prof. Heinz von Seggern.

In the late 1970s, when he was a doctoral student, German scientist Heinz von Seggern came to Brazil for the first time and met some local researchers with whom he still collaborates. His host was Bernhard Gross, another German scientist who settled in Brazil and is considered a pioneer of materials research in the country. This was the beginning of a series of scientific visits of Heinz von Seggern to Brazil, which included the participation in five B-MRS Meetings, the annual events of the Brazilian Materials Research Society. In the last edition of the event, Prof. Heinz von Seggern gave a plenary lecture on ferroelectrets.

Heinz von Seggern graduated in physics from the University of Hannover (Germany) in 1976. He received his PhD degree in electrical engineering from the Technical University of Darmstadt (Germany) in 1979. His thesis advisor was Prof. Gerhard Sessler, one of the inventors of the electret microphone, the most common type of microphone in use today. After that, Heinz von Seggern became a postdoc and then a principal investigator at AT&T Bell Laboratories (USA). From 1985 to 1997 he worked at Siemens research center in Erlangen (Germany), starting as a principal investigator and then being promoted to department head. Since 1997, he is Full Professor at the Technical University of Darmstadt, where he leads the Electronic Materials Group.

Throughout four decades of scientific research, Heinz von Seggern has made important contributions to the field of materials in understanding fundamental phenomena, developing analysis techniques and applications, and inventing devices. He has published over 280 scientific papers in peer-reviewed journals with more than 7.800 citations, and his h-index is 46 (Google Scholar).

See our interview with this scientist.

B-MRS Newsletter: – What motivated you to become a scientist and, particularly, a materials scientist?

Heinz von Seggern: – Already as a high school student my main interest was directed towards natural science. This passion was strongly motivated by one of my teachers who really understood to ignite my love for this field. So it was a natural thing for me to study physics, however, I always kept in touch with mathematics and chemistry. After finishing my diploma in physics at the Technical University of Hannover, I started my PhD work at the Technical University of Darmstadt in the electrical engineering department and two and a half years later I received my doctoral degree in electrical engineering. The following four out of five years I spend at Bell Laboratories in Murray Hill, New Jersey, USA whose fabulous working conditions made my bonds to science even stronger. My path to materials science started with my return to the Corporate Research Laboratories of Siemens AG in Erlangen where I spend 12 years before being appointed as full professor at the Technical University of Darmstadt, Germany. In the time at Siemens my work was focused on more practical aspects of science which I started to be increasingly interested in. The ability to change and adapt material properties to practical demands, which is the basic task of materials science, fascinated me more and more.

B-MRS Newsletter: – In your opinion, what are your main contributions to the materials field? Please, select a couple of discoveries/developments, describe them briefly, describe the context in which they were developed, and share the papers or patents references.  

Heinz von Seggern: – Since I have been working on different subjects it is not so easy to point out my or our major contributions to the materials field. I will concentrate on one discovery or development in each field. Let’s start with my PhD study. My task was to understand the charge transport and electronic trap structure of Teflon FEP thin films to back up the lifetime expectation of electret microphones. I discovered by means of thermally stimulated discharge measurements that Teflon FEP contains two different types of energetically deep electron traps which are located near the surface and in the bulk of the films, respectively. This discovery was made possible by comparing TSD results of corona and electron beam charged samples whereby corona charging leads to filling of traps close to the surface and electron-beam charging allowed for deposition of charge into surface and bulk traps dependent on the utilized electron energy. From this finding a charge transport model was developed depending on the initial location of the electrons after charging. The model is based on trapping and thermally induced release. In case of corona charging the transport is initiated by a thermally induced release of electrons from surface traps and a subsequent capture and release by deeper bulk traps [Ref: H. von Seggern, J. Appl. Phys. 50, 7039 (1979), Heinz von Seggern, J. Appl. Phys. 50, 2817 (1979)]. The morphological reason for the different trap depth of surface and bulk can be seen in the film production process where different cooling rates apply to the surface and the bulk of the films.

After finishing my PhD degree I continued this research at Bell Laboratories investigating the transport of positive charges. In contrast to the electron traps, hole traps are relatively shallow and are distributed through the complete film. Once filled they empty relatively fast already at room temperature. On the other hand the number to energetically deep traps was found to be rather small resulting in a low capture rate. This implies that holes have a high probability to penetrate the film via hopping through shallow traps without being captured by deep traps which implies a rather low charge stability of Teflon FEP for holes. We were able to show that this problem can be circumvented by charging at high temperatures filling only deep traps [H. von Seggern, J. West, J. Appl. Phys. 55, 2754 (1984)]. This charge stabilization for positive charges recently became important with respect to so called piezoelectrets where by symmetry breaking a novel piezoelectric material was generated utilizing only nonpolar components. For these devices the stability of both charge types is essential.

During my time at the Corporate Research Labs of Siemens AG in Erlangen the field of interest changed to x-ray storage phosphors which are currently applied in so called image plates used commercially in x-ray diagnostics. The image plate thereby combines the classically utilized silver halide film and the intensifying screen where latter was applied to convert incoming x-rays to visible photons which are then detected by the photographic silver halide film. The working principle of the image plate is that by x-ray exposure electrons and holes are generated and trapped as F-centers and Vk-centers, respectively. Readout occurs by photostimulation of the electron and radiative recombination with the Vk-center. The released energy is then converted to a rare earth ion which emits light at its characteristic wavelength. Thereby the intensity of the emitted photons is indicative for the locally absorbed x-ray dose. My major contribution to this field was the discovery of the basic working principle of these photostimulable phosphors and the existence of spatially correlated and uncorrelated PSL centers which allowed for a deeper insight into the physics of storage phosphors [H. von Seggern et al., J. Appl. Phys. 64, 1405 (1988)]. Another contribution was the invention of neutron image plates fabricated by mixing an effective neutron absorber to the granular storage phosphor particles [T. Bücherl, H. von Seggern et al., Nucl. Instr. Meth. A333, 502 (1993)]. This technique is still widely used in neutron image detection.

After accepting the position as full professor in Materials Science at the Technische Universität Darmstadt I concentrated my efforts on the field of Organic Electronics which I already started at Siemens some years before. In the first years we focused on the energetic trap distribution of organic semiconductors. We were the first to experimentally prove the existence of a Gaussian trap distribution predicted earlier by Bässler et al. through Monte Carlo simulation. The experimental method used a refined thermally stimulated discharge technique known as fractional discharge, where a stepwise increase in temperature combined with the corresponding thermal release of charge allows one to determine the trap distribution which up to now is the only technique known to directly determine the distribution of traps  [N. von Malm et al., J. Appl. Phys. 89, 5559 (2001); R. Schmechel et al., Phys. Stat. Sol. (a) 201, 1215 (2004)]. The largest scientific attention we received, however, for the invention of the organic light emitting transistor (OFET) based on tetracene and a polyfluorene derivative. In such OFETs it was shown to be possible to obtain ambipolar transport by injection of electrons and holes from source and drain, respectively [A. Hepp, H.von Seggern et al., Phys. Rev. Let. 157406, 1 (2003); M. Ahles, H. von Seggern et al., Appl. Phys. Let. 84, 428 (2004)].  It was also shown that the same ambipolar transport can be used to construct colour tunable OFETs [E. J. Feldmeier, H. von Seggern et al., Adv. Mater 22, 3568 (2010)] where the motion of the emissive recombination zone through the transistor channel is used to excite different overlaying organic semiconductors with different emission wavelength.

In the last years at TU Darmstadt I have revisited charge storage in organic polymers known as ferro- or piezoelectrets. The cellular polymer polypropylene has shown by Finnish scientists to exhibit large piezoelectric d33 coefficients after poling by high electric fields with the only disadvantage that the trapped charge turned out to be thermally unstable. Therefore structures changed quickly to Teflon based sandwiches of solid FEP /ePTFE/ solid FEP, where ePTFE is a highly porous PTFE consisting of up to 98% air, and later to completely air filled structures. My contribution to that field is the physics explaining the hysteresis and thereof the deduction of the maximal stable polarization which then allows for the theoretical deduction of the piezoelectric d33 coefficient for plane-parallel structures. This knowledge allows for the optimization of the piezoelectric effect and therewith increases the potential for future applications [S. Zhukov, H. von Seggern et al., J. Appl. Phys. 102, 044109 (2007); S. Zhukov, H. von Seggern et al., Scientific reports 8, 4597 (2018)].

B-MRS Newsletter: – Please make a brief story of your interaction with Brazil and with Prof Bernhard Gross.

Heinz von Seggern: – During my PhD work at TU Darmstadt Prof. Gross was a frequent guest of Prof. G.M. Sessler, my thesis adviser. Before my final PhD defense he invited me to visit the Institute of Physics of the University of Sao Paulo (USP) in Sao Carlos. Here I met all the people with whom I am still in contact and friendship with, namely Roberto M. Faria and Jose A. Giacometti who in the meantime have become established professors at USP. After finishing my PhD study I went to Bell Laboratories, Murray Hill, NJ. where Profs. Gross and Sessler were welcomed guest almost every year. The collaboration was extremely fruitful and resulted in a number of joint publications. In 1984 I then left Bell Labs and started to work at Siemens Corporate Research on different topics for the next 12 years and naturally the collaboration was at rest. But as soon as I became appointed Professor at TU Darmstadt I revitalized my connection to the Institute of Physics of Sao Carlos, whose polymer group is now called Grupo de Polimeros “Prof. Bernhard Gross”. From that year on I visited initially Prof. Giacometti and later Prof. Faria almost yearly for up to two month financed generously by FAPESP through various programs. These stays were always very enjoyable and busy, and quite a few publications have resulted.

B-MRS Newsletter: – How many times did you attend the B-MRS Meetings? Do you remember when was the first time?

Heinz von Seggern: – In total I have attended five Brazilian MRS meetings starting in Natal 2007, Florianopolis 2012, Joan Pessoa 2014, Rio de Janeiro 2015 and again Natal in 2017. My first stay in Natal 2007 I remember especially since I was allowed to present our work in front of a great audience on the recently discovered light emitting organic field effect transistor and, on a more personal note, I also remember the wonderful Caipirinha my wife and me were enjoying every evening during sunset at the ocean side.

B-MRS Newsletter: – You have about 40 years of strong experience as a researcher. Please leave a short message with some advice for the students and junior scientists of our community. 

Heinz von Seggern: – In the context of scientific education Prof. Bernhard Gross once said to me: “For someone who knows nothing, everything is possible.” There is a lot of truth in these few words. We all tend to sometimes talk about things that seem to be obvious to us but in reality they are not. My advice therefore is, especially to young scientists, to always ask yourself whether you understand the physical and/or chemical grounds of your current research. If not I suggest to you to acquire the missing basics, which then allows you to select from “everything is possible” the physical meaningful trials. This will definitely help you to make the right decisions to continue your research in a meaningful way.

Seleção de professores pesquisadores para o PPGCEM – UNESC.


 Edital para contratação de docentes  para atuarem no Programa de Pós-graduação “Stricto Sensu” e nos Cursos de Graduação.

Área de Ciência e Engenharia de Materiais, na Universidade do Extremo Sul Catarinense – UNESC.

São Três (03) Vagas para atuarem como professor pesquisador no mestrado/ doutorado do PPGCEM e graduação.

Edital disponível no link: https://www.unesc.net/portal/resources/official_documents/16370.pdf?1543449958

XVIII B-MRS Meeting: palestras plenárias e palestra memorial.


logo médioSaiba quais serão as palestras plenárias e a palestra memorial do XVIII B-MRS Meeting (Balneário Camboriú, 22 a 26 de setembro de 2019).

 

Memorial Lecture

Prof. Yvonne Primerano Mascarenhas

Instituto de Física de São Carlos – USP

 

Plenary Lectures

Prof. Julia Greer

California Institute of Technology – USA

Title: Materials by Design: Three-Dimensional Nano-Architected Meta-Materials

 

Prof. Stefano Baroni

Scuola Internazionale Superiore di Studi Avanzati – Italy

Title: Multi scale simulation of the color optical properties of natural dyes in solution

 

Prof. Alan Taub

University of Michigan – USA

Title: Challenges in Processing of Materials to Reduce Weight of Structural Components

 

Prof. Norbert Koch

Humboldt-Universität zu Berlin – Germany

Title: Hybrid inorganic/organic semiconductor structures for opto-electronics

 

Prof. Mingzhong Wu

Colorado State University – USA

Title: Spin Transfer in Topological Insulator/Magnetic Insulator Bi-Layered Structures

 

Prof. Maurizio Prato

Università degli Studi di Trieste – Italy

Title: Multifunctional Hybrid Carbon Interfaces

Sócio fundador da SBPMat é um dos vencedores de prêmio nacional do Instituto Nanocell.


Fernando Galembeck
Fernando Galembeck

Fernando Galembeck, professor aposentado colaborador da UNICAMP, é um dos cientistas distinguidos com o III Prêmio Cientistas e Empreendedores do Ano Instituto Nanocell. Galembeck foi selecionado na categoria “Professor”, na área “Nanotecnologia”.

O professor Galembeck, que tem um amplo histórico de atuação em pesquisa, desenvolvimento e inovação em materiais, é sócio fundador da SBPMat e foi destacado neste ano pela sociedade com a Palestra Memorial Joaquim da Costa Ribeiro.

Pós-doutorado no PPGCEM da UFRN.


O Programa de Pós-Graduação em Ciência e Engenharia de Materiais (PPGCEM) da Universidade Federal do Rio Grande do Norte (UFRN), programa avaliado com Nota 7 pela CAPES, divulga novo Edital de Estágio Pós-Doutoral do Programa (EDITAL 04/2018 – PPGCEM – PROCESSO SELETIVO PARA PÓS-DOUTORADO), disponível aqui.

As inscrições poderão ser realizadas no período de 15/12/2018 a 25/01/2019, pelo site do PPGCEM (www.posgraduacao.ufrn.br/ppgcem) ou pela página do SIGAA: https://sigaa.ufrn.br/sigaa/public/processo_seletivo/lista.jsf?aba=pprocesso&nivel%2520=S

Serão disponibilizadas 4 (quatro) vagas para Doutores em Ciência e Engenharia de Materiais ou áreas afins.

Os candidatos aprovados poderão solicitar ao PPGCEM bolsa de pós-doutorado, dentro das cotas disponibilizadas pela CAPES ao Programa e conforme disponibilidade das mesmas, no âmbito do Programa Nacional de Pós-Doutorado (PNPD/CAPES).

E, para mais informações ou em caso de dúvidas:

Inscrições para o mestrado e doutorado em Nanotecnologia da COPPE/UFRJ.


Estão abertas as inscrições para o Processo Seletivo 2019/1 ao Mestrado Acadêmico e ao Doutorado do Programa de Pós-Graduação em Engenharia da Nanotecnologia – PENt da COPPE/UFRJ.

O PENt é um Programa pioneiro no Brasil na área de Engenharia da Nanotecnologia, que deu início às suas atividades no ano de 2014.

Nesta oportunidade estão sendo oferecidas 20 vagas para o Mestrado Acadêmico (para entrada no período 2019/1) e um total de 20 vagas para o Doutorado (para entradas nos períodos 2019/1, 2019/2 e 2019/3).

O período de inscrição para ingresso no Mestrado Acadêmico no período 2019/1 é de 08/10/2018 a 23/11/2018 07/12/2018 (NOVA DATA).
O período de inscrição para ingresso no Doutorado no período 2019/1 é de 08/10/2018 a 14/12/2018.

Mais informações e documentos estão disponíveis na página do PENt na internet: http://www.pent.coppe.ufrj.br/index.php/processoseletivo.html