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Galvanic replacement induced electromotive force to propel Janus micromotors

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hdl:2117/352898

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Bastos Arrieta, Julio AlonsoMés informació
Geisbauer, Christian
Eychmüller, Alexander
Simmchen, Juliane
Document typeArticle
Defense date2019-04-14
PublisherAmerican Institute of Physics (AIP)
Rights accessOpen Access
All rights reserved. This work is protected by the corresponding intellectual and industrial property rights. Without prejudice to any existing legal exemptions, reproduction, distribution, public communication or transformation of this work are prohibited without permission of the copyright holder
Abstract
Electrochemistry is a highly versatile part of chemical research which is involved in many of the processes in the field of micromotion. Its input has been crucial from the synthesis of microstructures to the explanation of phoretic mechanisms. However, using electrochemical effects to propel artificial micromotors is still to be achieved. Here, we show that the forces generated by electrochemical reactions can not only create active motion, but they are also strong enough to overcome the adhesion to the substrate, caused by the increased ionic strength of the solutions containing the ions of more noble metals themselves. The galvanic replacement of copper by platinum ions is a spontaneous process, which not only provides a sufficiently strong electromotive force to propel the Janus structures but also results in asymmetric Pt-hatted structures, which can be further used as catalytic micromotors
CitationBastos-Arrieta, J. [et al.]. Galvanic replacement induced electromotive force to propel Janus micromotors. "Journal of chemical physics", 14 Abril 2019, vol. 150, núm. 14, p. 144902-1-144902-6. 
URIhttp://hdl.handle.net/2117/352898
DOI10.1063/1.5085838
ISSN0021-9606
Publisher versionhttps://aip.scitation.org/doi/10.1063/1.5085838
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  • Departament d'Enginyeria Química - Articles de revista [1.991]
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