Geometric asymmetry driven Janus micromotors

Guanjia Zhao, Martin Pumera

Research output: Contribution to journalArticle

33 Citations (Scopus)

Abstract

The production and application of nano-/micromotors is of great importance. In order for the motors to work, asymmetry in their chemical composition or physical geometry must be present if no external asymmetric field is applied. In this paper, we present a "coconut" micromotor made of platinum through the partial or complete etching of the silica templates. It was shown that although both the inner and outer surfaces are made of the same material (Pt), motion of the structure can be observed as the convex surface is capable of generating oxygen bubbles. This finding shows that not only the chemical asymmetry of the micromotor, but also its geometric asymmetry can lead to fast propulsion of the motor. Moreover, a considerably higher velocity can be seen for partially etched coconut structures than the velocities of Janus or fully etched, shell-like motors. These findings will have great importance on the design of future micromotors. This journal is

Original languageEnglish
Pages (from-to)11177-11180
Number of pages4
JournalNanoscale
Volume6
Issue number19
DOIs
Publication statusPublished - 2014 Oct 7

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

Fingerprint Dive into the research topics of 'Geometric asymmetry driven Janus micromotors'. Together they form a unique fingerprint.

  • Cite this