Issue 17, 2015
From the journal:

RSC Advances

Bubble-propelled trimetallic microcaps as functional catalytic micromotors†

M. Safdar,a   T. Itkonenb  and  J. Jänis*a  

* Corresponding authors

a Department of Chemistry, University of Eastern Finland, P.O. Box 111, FI-80101 Joensuu, Finland
E-mail: janne.janis@uef.fi

b Department of Physics and Mathematics, University of Eastern Finland, P.O. Box 111, FI-80101 Joensuu, Finland

Abstract

We report on the preparation of trimetallic (Pt/Ni/Au) microcaps using silica particles as templates. Capping of silica particles was performed by simple sputter deposition of metal layers, followed by dissolution of templates to obtain a suspension of microcaps. The microcaps were bubble-propelled to very high speeds (up to ∼500 μm s−1 on average) in the presence of 6% hydrogen peroxide as fuel. While the Ni layer provides a directional control of microcaps in an external magnetic field, the Au layer allows surface modification for further applications. We also demonstrate capture and cargo transport of oil droplets by microcap motors.

Graphical abstract: Bubble-propelled trimetallic microcaps as functional catalytic micromotors

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Article information

DOI
https://doi.org/10.1039/C4RA16589F
Article type
Communication
Submitted
17 Dec 2014
Accepted
19 Jan 2015
First published
19 Jan 2015

RSC Adv., 2015,5, 13171-13174

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Bubble-propelled trimetallic microcaps as functional catalytic micromotors

M. Safdar, T. Itkonen and J. Jänis, RSC Adv., 2015, 5, 13171 DOI: 10.1039/C4RA16589F

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