Self-motile colloidal particles: From directed propulsion to random walk

被引：1733

作者：

Howse, Jonathan R.

Jones, Richard A. L. ^{[1
]}

Ryan, Anthony J.

Gough, Tim

Vafabakhsh, Reza

Golestanian, Ramin

机构：

[1] Univ Sheffield, Dept Phys & Astron, Sheffield S3 7RH, S Yorkshire, England

[2] Univ Sheffield, Dept Chem, Sheffield S3 7HF, S Yorkshire, England

[3] Univ Bradford, IRC Polymer Engn, Bradford BD7 1DP, W Yorkshire, England

[4] Inst Adv Studies Basic Sci, Zanjan 451951159, Iran

来源：

PHYSICAL REVIEW LETTERS | 2007年 / 99卷 / 04期

基金：

英国工程与自然科学研究理事会;

关键词：

D O I：

10.1103/PhysRevLett.99.048102

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The motion of an artificial microscale swimmer that uses a chemical reaction catalyzed on its own surface to achieve autonomous propulsion is fully characterized experimentally. It is shown that at short times it has a substantial component of directed motion, with a velocity that depends on the concentration of fuel molecules. At longer times, the motion reverts to a random walk with a substantially enhanced diffusion coefficient. Our results suggest strategies for designing artificial chemotactic systems.

引用

页数：4

共 19 条

[11] Bioelectrochemical propulsion [J].