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

被引：50

作者：

Guo, Lingling ^{[1
,2
]}

Yan, Haoming ^{[1
,2
]}

Moore, Quentarius ^{[3
]}

Buettner, Michael ^{[2
]}

Song, Jinhui ^{[2
,4
]}

Li, Lin ^{[2
,4
]}

Araujo, Paulo T. ^{[2
,5
]}

Wang, Hung-Ta ^{[1
,2
]}

机构：

[1] Univ Alabama, Dept Chem & Biol Engn, Tuscaloosa, AL 35487 USA

[2] Univ Alabama, Ctr Mat Informat Technol MINT Ctr, Tuscaloosa, AL 35487 USA

[3] Jackson State Univ, Dept Chem & Biochem, Jackson, MS 39217 USA

[4] Univ Alabama, Dept Met & Mat Engn, Tuscaloosa, AL 35487 USA

[5] Univ Alabama, Dept Phys & Astron, Tuscaloosa, AL 35487 USA

来源：

NANOSCALE | 2015年 / 7卷 / 28期

基金：

美国国家科学基金会;

关键词：

3-DIMENSIONAL TOPOLOGICAL INSULATOR; MECHANICAL-PROPERTIES; MONOLAYER; CONSTANTS; DYNAMICS; BI2SE3; MODULI; LAYERS; MOS2;

D O I：

10.1039/c5nr03282b

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

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.

引用

页码：11915 / 11921

页数：7

共 44 条

[1] Stretching and Breaking of Ultrathin MoS2 [J].