Nanoscale Directional Motion towards Regions of Stiffness

被引：82

作者：

Chang, Tienchong ^{[1
,2
]}

Zhang, Hongwei ^{[2
]}

Guo, Zhengrong ^{[2
,3
]}

Guo, Xingming ^{[2
]}

Gao, Huajian ^{[3
]}

机构：

[1] Shanghai Jiao Tong Univ, Sch Naval Architecture Ocean & Civil Engn, State Key Lab Ocean Engn, Shanghai 200240, Peoples R China

[2] Shanghai Univ, Shanghai Inst Appl Math & Mech, Shanghai Key Lab Mech Energy Engn, Shanghai 200072, Peoples R China

[3] Brown Univ, Sch Engn, Providence, RI 02912 USA

来源：

PHYSICAL REVIEW LETTERS | 2015年 / 114卷 / 01期

关键词：

CARBON NANOTUBES; SUBSTRATE; DRIVEN; SURFACE; MOTOR;

D O I：

10.1103/PhysRevLett.114.015504

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

How to induce nanoscale directional motion via some intrinsic mechanisms pertaining to a nanosystem remains a challenge in nanotechnology. Here we show via molecular dynamics simulations that there exists a fundamental driving force for a nanoscale object to move from a region of lower stiffness toward one of higher stiffness on a substrate. Such nanoscale directional motion is induced by the difference in effective van der Waals potential energy due to the variation in stiffness of the substrate; i.e., all other conditions being equal, a nanoscale object on a stiffer substrate has lower van der Waals potential energy. This fundamental law of nanoscale directional motion could lead to promising routes for nanoscale actuation and energy conversion.

引用

页数：5

共 32 条

[1] Carbon nanotube electron windmills: A novel design for nanomotors [J].