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Catalytic Iridium-Based Janus Micromotors Powered by Ultralow Levels of Chemical Fuels

Gao, Wei and Pei, Allen and Dong, Renfeng and Wang, Joseph (2014) Catalytic Iridium-Based Janus Micromotors Powered by Ultralow Levels of Chemical Fuels. Journal of the American Chemical Society, 136 (6). pp. 2276-2279. ISSN 0002-7863. http://resolver.caltech.edu/CaltechAUTHORS:20180123-095921744

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Abstract

We describe catalytic micromotors powered by remarkably low concentrations of chemical fuel, down to the 0.0000001% level. These Janus micromotors rely on an iridium hemispheric layer for the catalytic decomposition of hydrazine in connection to SiO_2 spherical particles. The micromotors are self-propelled at a very high speed (of ∼20 body lengths s^(–1)) in a 0.001% hydrazine solution due to osmotic effects. Such a low fuel concentration represents a 10 000-fold decrease in the level required for common catalytic nanomotors. The attractive propulsion performance, efficient catalytic energy-harvesting, environmentally triggered swarming behavior, and magnetic control of the new Janus micromotors hold considerable promise for diverse practical applications.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1021/ja413002eDOIArticle
http://pubs.acs.org/doi/abs/10.1021/ja413002ePublisherArticle
http://pubs.acs.org/doi/suppl/10.1021/ja413002ePublisherSupporting Information
Additional Information:© 2014 American Chemical Society. Received 20 December 2013. Published online 29 January 2014. Published in print 12 February 2014. This project received support from the Defense Threat Reduction Agency-Joint Science and Technology Office for Chemical and Biological Defense (Grant No. HDTRA1-13-1-0002). W.G. is a HHMI International Student Research fellow. The authors also thank R. Tam and I. Rozen for their help. The authors declare no competing financial interest.
Funders:
Funding AgencyGrant Number
Defense Threat Reduction Agency (DTRA)HDTRA1-13-1-0002
Howard Hughes Medical Institute (HHMI)UNSPECIFIED
Record Number:CaltechAUTHORS:20180123-095921744
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20180123-095921744
Official Citation:Catalytic Iridium-Based Janus Micromotors Powered by Ultralow Levels of Chemical Fuels Wei Gao, Allen Pei, Renfeng Dong, and Joseph Wang Journal of the American Chemical Society 2014 136 (6), 2276-2279 DOI: 10.1021/ja413002e
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:84471
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:01 Feb 2018 00:30
Last Modified:01 Feb 2018 00:30

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