2017 - Sustainable Industrial Processing Summit & Exhibition
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22-26 October 2017, Fiesta Americana Condesa Cancun All Inclusive Resort, Cancun, Mexico
Almost 400 Abstracts Submitted from 60 Countries
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PLENARY LECTURES AND VIP GUESTS
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Yasmine Sassa

Uppsala University

Novel Two-dimensional Graphene-like Systems Based On Silicon Allotropes
Marquis International Symposium on New and Advanced Materials and Technologies for Energy, Environment and Sustainable Development(3rd Intl Symp. on New and Advanced Materials and Technologies for Energy, Environment and Sustainable Development)

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Abstract:

Since the discovery of graphene in 2004, numerous efforts were made to find materials hosting similar electronic properties (e.g., two-dimensional, Dirac cone, high Fermi velocity and carrier mobility). Already in the mid-90, a special focus on group-IV elements were addressed, and theoretical predictions of silicon (Si) analogs of graphite were explored. It is only in 2007 that the low buckled structure of silicon was confirmed to be stable by ab initio calculations and named silicene. However, contrary to graphene that can be generated by exfoliation of graphite, the elaboration of pure two-dimensional silicene requires more advanced methods. One successful approach is to deposit silicon on metal surfaces that do not interact strongly with the Si atoms. In this seminar, I will present recent advances in the synthesis, functionalization, electronic properties, and potential applications of the recently created novel silicon allotropes, namely hexasilabenzene-like nanodots, massively parallel pentasilicene-like nanoribbons exclusively composed of pentagonal Si tiles, and single- to multi-layer silicene sheets hosting Dirac fermions. Finally, I will also briefly discuss, silicene’s heavier cousins, germanene and stanene, whose strong spin orbit coupling lets anticipate the Quantum Spin Hall effect at room temperature and above.

Distinguished Guests

Prof. Dan Shechtman
2011 Nobel Prize Winner
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