Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 136, Issue 6, Pages 2276-2279Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ja413002e
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- Defense Threat Reduction Agency-Joint Science and Technology Office for Chemical and Biological Defense [HDTRA1-13-1-0002]
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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 SiO2 spherical particles. The micromotors are self-propelled at a very high speed (of similar to 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.
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