Speaker: David Tomanek
Affiliation: Michigan State University, USA
Abstract Details: Significant advances in Materials Science have been achieved by harnessing specific functionalities of nanostructures, such as improved mechanical, electrical and thermal properties, for particular applications. Predictive ab initio calculations suggest that designer nanostructures, such as schwarzites[1] and related foam structures[2] of carbon, may combine low gravimetric density with high stiffness and favorable electrical as well as thermal conductivity. Twisted carbon nanotube ropes [3] may store reversibly much more energy than other energy storage devices [4]. Unusual charge and thermal transport properties can be expected in peapods consisting of doped fullerenes or diamondoids enclosed in a carbon nanotube [5]. Unusual nanostructures such as Se double helices [6] or metallic sulfur chains [7] form inside the void of carbon nanotubes. Successful synthesis of such nanostructures precludes detailed understanding of their microscopic formation mechanism. Since direct observation of such atomic-scale processes is very hard by experimental means, computer simulations are a welcome alternative to gain microscopic insight into the underlying processes. [1] S. Park, K. Kittimanapun, J.-S. Ahn, Y.-K. Kwon and D. Tománek, J. Phys.: Condens. Matter 22, 334220 (2010). [2] Z. Zhu and D. Tománek, Phys. Rev. Lett. 109, 135501 (2012). [3] David Teich, Gotthard Seifert, Sumio Iijima, and David Tománek, Phys. Rev. Lett. 108, 235501 (2012). [4] David Teich, Zacharias G. Fthenakis, Gotthard Seifert, and David Tománek, Phys. Rev. Lett. 109, 255501 (2012). [5] Jinying Zhang, Zhen Zhu, Yanquan Feng, Hitoshi Ishiwata, Yasumitsu Miyata, Ryo Kitaura, Jeremy E. P. Dahl, Robert M. K. Carlson, Natalie A. Fokina, Peter R. Schreiner, David Tománek, and Hisanori Shinohara, Angew. Chem. Int. Ed. 52, 3717 (2013). [6] Toshihiko Fujimori, Renato Batista dos Santos, Takuya Hayashi, Morinobu Endo, Katsumi Kaneko, and David Tománek, ACS Nano 7, 5607 (2013). [7] Toshihiko Fujimori, Aarón Morelos-Gómez, Zhen Zhu, Hiroyuki Muramatsu, Ryusuke Futamura, Koki Urita, Mauricio Terrones, Takuya Hayashi, Morinobu Endo, Sang Young Hong, Young Chul Choi, David Tománek and Katsumi Kaneko, Nature Commun. (2013).Click HERE for directions

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