Inscrições abertas! |
Data limite: Submissão: 15/06 Aceite: 18/07 |
|
Symposium E: Materials with Negative Properties / 8th International Workshop on Auxetic & Related MaterialsDownloadScope of the SymposiumThe Symposium E on Materials with Negative Properties will provide an unique opportunity for Brazilian and international scientific communities to discuss together the issues regarding to this exiting research field since 8th edition of the prestigious international conference on Auxetic & Related Materials will be held this year in September as a joint site conference with sites in Poland (http://ifmpan.poznan.pl/auxetics2011/) and Brazil (hosted at Symposium E). The Symposium will provide an exciting environment for the discussion of recent theoretical and experimental developments in the general of materials that display unusual negative properties, such as negative thermal expansion, negative Poisson's ratio (auxetics), negative compressibility and negative refractive index (metamaterials). The first reports on materials exhibiting negative thermal expansion (NTE), i.e., contracting as temperature increases, go back more than 50 years. This property is not restricted to exotic classes of materials. Even familiar compounds such as hexagonal ice and water show NTE, although over a limited temperature range. The field has been growing since the re–discovery of NTE in cubic ZrW2O8 (AM2O8 family) in 1996. Several other classes of open–framework materials, including AO2, AMO5, AM2O7, A2O and A2M3O12 compositions, have emerged as potential sources of crystalline phases displaying low or NTE. These materials have opened up opportunities for the scientific community to exploit negative thermal expansion for a variety of applications. Negative compressibility materials expand when submitted to isostatic pressure. The emergence of nano science in last 20 years has led to the development and engineering of novel materials and properties through the design of complex architectures with engineered sizes, compositions and morphologies. For example, by controlling the ratio of single wall to multi-wall carbon nanotubes in composites their Poisson's ratio can be tuned from positive to negative values, making possible a biaxial expansion under hydrostatic pressures. Recently, it was experimentally demonstrated, for a certain wavelength range, that it is possible to design materials and systems with negative refractive index (so-called metamaterials), opening a rich research field with many envisioned applications. The discovery of the materials with negative properties has stimulated the scientific community to pursue the development of models that both enable an understanding of the fundamental mechanisms responsible for these striking properties, and guide the development of novel materials, which could help overcome some of the technological challenges facing modern society. Abstracts will be solicited in (but not limited to) the following areas:
Tentative list of invited speakersAngus Wilkinson (Georgia Institute of Technology, USA), Joseph N. Grima (University of Malta, Malta); Claudio Perottoni (UCS – RS), Paulo Tarso Cavalcante Freire (UFC), Sócrates O. Dantas (UFJF), Thomas Dumelow (UERN). Organization Committee of the Symposium EBojan Marinkovic (Department of Materials Engineering – PUC, Rio de Janeiro) Scientific Committee of the Symposium EÀlvaro Saavedra (Cenpes - Petrobras) Scientific Committee of the 8th International Workshop on Auxetic & Related MaterialsAndrew Alderson (University of Bolton, UK) Contact: Deadline for abstract submission: |
|