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Twisted-shape selection of self-assembled Si 〈100〉 nanobelts and nanowires
, Article Journal of Physics D: Applied Physics ; Volume 54, Issue 25 , 2021 ; 00223727 (ISSN) ; Nejat Pishkenari, H ; Zohoor, H ; Sharif University of Technology
IOP Publishing Ltd
2021
Abstract
This letter discusses the surface-reconstruction-induced self-twisting behavior of Si100 nanobelts and nanowires (NWs) with rectangular cross section. Giving a thorough physical interpretation, we explain the reason behind this phenomenon and present a continuum-based model. It is revealed that these structures can self-assemble into both right- and left-handed helicoids depending on their crystal arrangements. More specifically, for NWs with the same number of layers in each of their cross sections directions, two distinct values of torsion angle are possible for each of right- and left-handed twisted morphologies. In conclusion, four modes of torsion can be observed in Si100 NWs....