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Ultrasound-Modulated Bubble Propulsion of Chemically Powered Microengines

Xu, Tailin and Soto, Fernando and Gao, Wei and Garcia-Gradilla, Victor and Li, Jinxing and Zhang, Xueji and Wang, Joseph (2014) Ultrasound-Modulated Bubble Propulsion of Chemically Powered Microengines. Journal of the American Chemical Society, 136 (24). pp. 8552-8555. ISSN 0002-7863. http://resolver.caltech.edu/CaltechAUTHORS:20180122-141922167

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Abstract

The use of an ultrasound (US) field for rapid and reversible control of the movement of bubble-propelled chemically powered PEDOT/Ni/Pt microengines is demonstrated. Such operation reflects the US-induced disruption of normal bubble evolution and ejection, essential for efficient propulsion of catalytic microtubular engines. It offers precise speed control, with sharp increases and decreases of the speed at low and high US powers, respectively. A wide range of speeds can thus be generated by tuning the US power. Extremely fast changes in the motor speed (<0.1 s) and reproducible “On/Off” activations are observed, indicating distinct advantages compared to motion control methods based on other external stimuli. Such effective control of the propulsion of chemically powered microengines, including remarkable “braking” ability, holds considerable promise for diverse applications.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1021/ja504150eDOIArticle
http://pubs.acs.org/doi/abs/10.1021/ja504150ePublisherArticle
http://pubs.acs.org/doi/suppl/10.1021/ja504150ePublisherSupporting Information
Additional Information:© 2014 American Chemical Society. Received 25 April 2014. Published online 4 June 2014. Published in print 18 June 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). T.X. acknowledges the China Scholarship Council (CSC) for financial support. W.G. is a HHMI International Student Research fellow. The authors thank Guoqing Pan and Michael Galarnyk for their help in the microengines preparation. The authors declare no competing financial interest.
Funders:
Funding AgencyGrant Number
Defense Threat Reduction Agency (DTRA)HDTRA1-13-1-0002
China Scholarship CouncilUNSPECIFIED
Howard Hughes Medical Institute (HHMI)UNSPECIFIED
Record Number:CaltechAUTHORS:20180122-141922167
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20180122-141922167
Official Citation:Ultrasound-Modulated Bubble Propulsion of Chemically Powered Microengines Tailin Xu, Fernando Soto, Wei Gao, Victor Garcia-Gradilla, Jinxing Li, Xueji Zhang, and Joseph Wang Journal of the American Chemical Society 2014 136 (24), 8552-8555 DOI: 10.1021/ja504150e
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:84463
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:31 Jan 2018 22:48
Last Modified:31 Jan 2018 22:48

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