Elastic properties of van der Waals epitaxy grown bismuth telluride 2D nanosheets

Lingling Guo; Haoming Yan; Quentarius Moore; Michael Buettner; Jinhui Song; Lin Li; Paulo T Araujo; Hung-Ta Wang

doi:10.1039/c5nr03282b

Elastic properties of van der Waals epitaxy grown bismuth telluride 2D nanosheets

Nanoscale. 2015 Jul 28;7(28):11915-21. doi: 10.1039/c5nr03282b. Epub 2015 Jun 29.

Authors

Lingling Guo¹, Haoming Yan, Quentarius Moore, Michael Buettner, Jinhui Song, Lin Li, Paulo T Araujo, Hung-Ta Wang

Affiliation

¹ Department of Chemical and Biological Engineering, The University of Alabama, Tuscaloosa, AL 35487, USA. htwang@eng.ua.edu.

PMID: 26118367
DOI: 10.1039/c5nr03282b

Abstract

Bismuth telluride (Bi2Te3) two-dimensional (2D) nanosheets prepared by van der Waals epitaxy were successfully detached, transferred, and suspended for nano-indentation measurements to be performed on freestanding circular nanosheets. The Young's modulus acquired by fitting linear elastic behaviors of 26 samples (thickness: 5-14 nm) is only 11.7-25.7 GPa, significantly smaller than the bulk in-plane Young's modulus (50-55 GPa). Compliant and robust Bi2Te3 2D nanosheets suggest the feasibility of the elastic strain engineering of topological surface states.

Publication types

Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, Non-P.H.S.