Asymmetric Pt/Au coated catalytic micromotors fabricated by dynamic shadowing growth

John G. Gibbs; Nicholas A. Fragnito; Yiping Zhao

doi:10.1063/1.3529448

Asymmetric Pt/Au coated catalytic micromotors fabricated by dynamic shadowing growth

John G. Gibbs, Nicholas A. Fragnito, Yiping Zhao

Research output: Contribution to journal › Article › peer-review

49 Scopus citations

Abstract

Asymmetric Pt/Au coated catalytic micromotors are fabricated by a dynamic shadowing growth method, and the exposed Au surface area A is changed systematically. The average moving speed u is found to follow the scaling relationship u A3/2, which agrees with the self-electrophoresis mechanism. Motion behaviors of micromotors with similar sizes and morphologies operating under a non-self-electrophoresis mechanism are compared with the Pt/Au micromotors, and in general, the self-electrophoresis mechanism gives higher activity for motors with similar sizes and morphologies.

Original language	English (US)
Article number	253107
Journal	Applied Physics Letters
Volume	97
Issue number	25
DOIs	https://doi.org/10.1063/1.3529448
State	Published - Dec 20 2010
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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title = "Asymmetric Pt/Au coated catalytic micromotors fabricated by dynamic shadowing growth",

abstract = "Asymmetric Pt/Au coated catalytic micromotors are fabricated by a dynamic shadowing growth method, and the exposed Au surface area A is changed systematically. The average moving speed u is found to follow the scaling relationship u A3/2, which agrees with the self-electrophoresis mechanism. Motion behaviors of micromotors with similar sizes and morphologies operating under a non-self-electrophoresis mechanism are compared with the Pt/Au micromotors, and in general, the self-electrophoresis mechanism gives higher activity for motors with similar sizes and morphologies.",

author = "Gibbs, {John G.} and Fragnito, {Nicholas A.} and Yiping Zhao",

note = "Funding Information: We acknowledge the financial support from the National Science Foundation under Contract Nos. CMMI-0726770 and ECCS-0901141.",

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AU - Gibbs, John G.

AU - Fragnito, Nicholas A.

AU - Zhao, Yiping

N1 - Funding Information: We acknowledge the financial support from the National Science Foundation under Contract Nos. CMMI-0726770 and ECCS-0901141.

PY - 2010/12/20

Y1 - 2010/12/20

N2 - Asymmetric Pt/Au coated catalytic micromotors are fabricated by a dynamic shadowing growth method, and the exposed Au surface area A is changed systematically. The average moving speed u is found to follow the scaling relationship u A3/2, which agrees with the self-electrophoresis mechanism. Motion behaviors of micromotors with similar sizes and morphologies operating under a non-self-electrophoresis mechanism are compared with the Pt/Au micromotors, and in general, the self-electrophoresis mechanism gives higher activity for motors with similar sizes and morphologies.

AB - Asymmetric Pt/Au coated catalytic micromotors are fabricated by a dynamic shadowing growth method, and the exposed Au surface area A is changed systematically. The average moving speed u is found to follow the scaling relationship u A3/2, which agrees with the self-electrophoresis mechanism. Motion behaviors of micromotors with similar sizes and morphologies operating under a non-self-electrophoresis mechanism are compared with the Pt/Au micromotors, and in general, the self-electrophoresis mechanism gives higher activity for motors with similar sizes and morphologies.

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Asymmetric Pt/Au coated catalytic micromotors fabricated by dynamic shadowing growth

Abstract

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