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Multi-Fuel Driven Janus Micromotors

Gao, Wei and D'Agostino, Mattia and Garcia-Gradilla, Victor and Orozco, Jahir and Wang, Joseph (2012) Multi-Fuel Driven Janus Micromotors. Small, 9 (3). pp. 467-471. ISSN 1613-6810.

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Here the first example of a chemically powered micromotor that harvests its energy from the reactions of three different fuels is presented. The new Al/Pd Janus microspheres—prepared by depositing a Pd layer on one side of Al microparticles—are propelled efficiently by the thrust of hydrogen bubbles generated from different reactions of Al in strong acidic and alkaline environments, and by an oxygen bubble thrust produced at their partial Pd coating in hydrogen peroxide media. High speeds and long lifetimes of 200 μm s^(−1) and 8 min are achieved in strong alkaline media and acidic media, respectively. The ability to autonomously adapt to the presence of a new fuel (surrounding environment), without compromising the propulsion behavior is illustrated. These data also represent the first example of a chemically powered micromotor that propels autonomously and efficiently in alkaline environments (pH > 11) without additional fuels. The ability to use multiple fuel sources to power the same micromotor offers a broader scope of operation and considerable promise for diverse applications of micromotors in different chemical environments.

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Additional Information:© 2013 Wiley. Received: August 1, 2012. Revised: September 10, 2012. Published online: October 11, 2012. W.G., M.D'A., and V.G. contritubed equally to this work. This work was supported by the United States Defense Threat Reduction Agency (DTRA), Office for Chemical & Biological Defense, and the Department of Energy (Grant Number DE-SC0004937). W.G. is a HHMI International Student Research fellow. M. D'A., V.G. and J.O. acknowledge financial support to the Government of Italy, CONACYT Mexico (fellowship 165885) and Catalonia (a Beatriu de Pinós Fellowship), respectively. The authors also thank Adlai Katzenberg, Allen Pei and Adam Ponedal for their assistance.
Funding AgencyGrant Number
Defense Threat Reduction Agency (DTRA)UNSPECIFIED
Department of Energy (DOE)DE-SC0004937
Howard Hughes Medical Institute (HHMI)UNSPECIFIED
Consejo Nacional de Ciencia y Tecnología (CONACYT)165885
Beatriu de Pinós (Catalonia)UNSPECIFIED
Issue or Number:3
Record Number:CaltechAUTHORS:20180124-084611418
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Official Citation:Gao, W., D'Agostino, M., Garcia-Gradilla, V., Orozco, J. and Wang, J. (2013), Multi-Fuel Driven Janus Micromotors. Small, 9: 467–471. doi: 10.1002/smll.201201864
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:84495
Deposited By: Ruth Sustaita
Deposited On:31 Jan 2018 22:22
Last Modified:03 Oct 2019 19:19

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