Atomic-Scale Friction of Black Phosphorus: Effect of Thickness and Anisotropic Behavior

被引：51

作者：

Cui, Ziyi ^{[1
]}

Xie, Guoxin ^{[1
]}

He, Feng ^{[1
]}

Wang, Weiqi ^{[1
]}

Guo, Dan ^{[1
]}

Wang, Wei ^{[1
]}

机构：

[1] Tsinghua Univ, Dept Mech Engn, State Key Lab Tribol, Beijing 100084, Peoples R China

来源：

ADVANCED MATERIALS INTERFACES | 2017年 / 4卷 / 23期

基金：

中国国家自然科学基金;

关键词：

anisotropy; atomic structure; black phosphorus; friction; FIELD-EFFECT TRANSISTORS; MONOLAYER GRAPHENE; STRAIN SENSORS; MOS2; RESONATORS; SHEETS;

D O I：

10.1002/admi.201700998

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The understanding on the friction properties of black phosphorus (BP) is very crucial for such applications as strain-engineered devices and micro/nanoelectromechanical systems. Herein, the relationship between the layer number of few-layer BP flakes and its nanoscale friction, as well as the atomic-scale friction anisotropy, is studied. BP flakes thicker than about five layers show almost the same friction as that of the bulk value, and the friction increases with the layer number decreasing from five, due to the strengthening mechanism. Obvious friction anisotropy of BP flakes are observed in that the friction for the armchair direction is the highest, that for the zigzag direction the lowest, and that for the lattice orientation between the two directions the intermediate. Supported by the theoretical prediction with 2D Tomlinson model, the observed phenomena are explained by the anisotropies in the amplitudes of the tip-induced flexural deformations of BP flakes.

引用

页数：9

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