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Highly Efficient Light-Driven TiO_2–Au Janus Micromotors

Dong, Renfeng and Zhang, Qilu and Gao, Wei and Pei, Allen and Ren, Biye (2016) Highly Efficient Light-Driven TiO_2–Au Janus Micromotors. ACS Nano, 10 (1). pp. 839-844. ISSN 1936-0851. doi:10.1021/acsnano.5b05940. https://resolver.caltech.edu/CaltechAUTHORS:20170922-143057302

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Abstract

A highly efficient light-driven photocatalytic TiO_2–Au Janus micromotor with wireless steering and velocity control is described. Unlike chemically propelled micromotors which commonly require the addition of surfactants or toxic chemical fuels, the fuel-free Janus micromotor (diameter ∼1.0 μm) can be powered in pure water under an extremely low ultraviolet light intensity (2.5 × 10^(–3) W/cm^2), and with 40 × 10^(–3) W/cm^2, they can reach a high speed of 25 body length/s, which is comparable to common Pt-based chemically induced self-electrophoretic Janus micromotors. The photocatalytic propulsion can be switched on and off by incident light modulation. In addition, the speed of the photocatalytic TiO_2–Au Janus micromotor can be accelerated by increasing the light intensity or by adding low concentrations of chemical fuel H_2O_2 (i.e., 0.1%). The attractive fuel-free propulsion performance, fast movement triggering response, low light energy requirement, and precise motion control of the TiO_2–Au Janus photocatalytic micromotor hold considerable promise for diverse practical applications.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1021/acsnano.5b05940DOIArticle
http://pubs.acs.org/doi/abs/10.1021/acsnano.5b05940PublisherArticle
http://pubs.acs.org/doi/suppl/10.1021/acsnano.5b05940PublisherSupporting Information
ORCID:
AuthorORCID
Dong, Renfeng0000-0001-7590-5750
Gao, Wei0000-0002-8503-4562
Ren, Biye0000-0003-0131-8750
Additional Information:© 2015 American Chemical Society. Received 21 September 2015. Date accepted 23 November 2015. Published online 23 November 2015. Published in print 26 January 2016. The financial support from the NSFC (21274047) and the Specialized Research Fund for the Doctoral Program of the Education Ministry (20120172110005) is gratefully acknowledged.
Funders:
Funding AgencyGrant Number
National Science Foundation of China21274047
Ministry of Education (China)20120172110005
Issue or Number:1
DOI:10.1021/acsnano.5b05940
Record Number:CaltechAUTHORS:20170922-143057302
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20170922-143057302
Official Citation:Highly Efficient Light-Driven TiO2–Au Janus Micromotors Renfeng Dong, Qilu Zhang, Wei Gao, Allen Pei, and Biye Ren ACS Nano 2016 10 (1), 839-844 DOI: 10.1021/acsnano.5b05940
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:81768
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:22 Sep 2017 22:01
Last Modified:15 Nov 2021 19:45

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