Issue 28, 2015
From the journal:

Nanoscale

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

Lingling Guo,ab   Haoming Yan,ab   Quentarius Moore,c   Michael Buettner,b   Jinhui Song,bd   Lin Li,bd   Paulo T. Araujobe  and  Hung-Ta Wang*ab  

* Corresponding authors

a Department of Chemical and Biological Engineering, The University of Alabama, Tuscaloosa, AL 35487, USA
E-mail: htwang@eng.ua.edu

b Center for Materials for Information Technology (MINT Center), The University of Alabama, Tuscaloosa, AL 35487, USA

c Department of Chemistry and Biochemistry, Jackson State University, Jackson, MS 39217, USA

d Department of Metallurgical and Materials Engineering, The University of Alabama, Tuscaloosa, AL 35487, USA

e Department of Physics and Astronomy, The University of Alabama, Tuscaloosa, AL 35487, USA

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.

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

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Article information

DOI
https://doi.org/10.1039/C5NR03282B
Article type
Communication
Submitted
19 May 2015
Accepted
17 Jun 2015
First published
19 Jun 2015

Nanoscale, 2015,7, 11915-11921

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

L. Guo, H. Yan, Q. Moore, M. Buettner, J. Song, L. Li, P. T. Araujo and H. Wang, Nanoscale, 2015, 7, 11915 DOI: 10.1039/C5NR03282B

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