Bulk synthesis of silver-head colloidal rodlike micromotors

Colloidal particles with asymmetric catalytic activities are emerging micro/nanomotors that harvest chemical energy for propulsion in fluids. It is of general interest to produce such particles with high performance, in large quantity and at low cost. In this paper, we present a facile bulk method t...

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Bibliographic Details
Published inSoft matter Vol. 14; no. 35; pp. 7119 - 7125
Main Authors Gao, Yongxiang, Dullens, Roel P A, Aarts, Dirk G A L
Format Journal Article
LanguageEnglish
Published England Royal Society of Chemistry 2018
Subjects
Catalysis
Chemical energy
Chemical synthesis
Colloids
Energy harvesting
Hydrogen peroxide
Micromotors
Organic chemistry
Rods
Silica
Silicon dioxide
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Summary:Colloidal particles with asymmetric catalytic activities are emerging micro/nanomotors that harvest chemical energy for propulsion in fluids. It is of general interest to produce such particles with high performance, in large quantity and at low cost. In this paper, we present a facile bulk method to synthesize silver-head colloidal silica rods. These particles self-propel towards their active sites by reacting with hydrogen peroxide, and the velocity is tuned via the fuel concentration. We show that these motors are highly efficient; compared to the currently available chemical-phoretic micro/nanomotors they show similar performance of self-propulsion at fuel concentrations that are two orders of magnitude smaller.
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ISSN:1744-683X
1744-6848
DOI:10.1039/c8sm00832a