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Applied Physics Letters / Volume 96 / Issue 21 / DEVICE PHYSICS

Appl. Phys. Lett. 96, 213509 (2010); http://dx.doi.org/10.1063/1.3431741 (3 pages)

Light-powered micromotor driven by geometry-assisted, asymmetric photon-heating and subsequent gas convection

Li-Hsin Han1, Shaomin Wu1, J. Christopher Condit2, Nate J. Kemp3, Thomas E. Milner2, Marc D. Feldman4,5, and Shaochen Chen1

1Department of Mechanical Engineering, The University of Texas at Austin, C2200, Texas 78712, USA
2Department of Biomedical Engineering, The University of Texas at Austin, C0800, Texas 78712, USA
3Volcano Corporation, 1 Fortune Drive, Billerica, Massachusettes 01821, USA
4Department of Medicine, University of Texas Health Science Center, San Antonio, Texas 78229, USA
5South Texas Veterans Health Care System, San Antonio, Texas 78229, USA

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(Received 9 April 2010; accepted 26 April 2010; published online 27 May 2010)

We report on the design, fabrication, and analysis of a light-driven micromotor. The micromotor was created from a nanoporous polymer with close-packed gold nanoparticles which generate heat by absorbing light. The blades of the micromotor were curved, forming convex and concave sides. Upon lateral irradiation, by geometric effect the convex side transfers more photon-generated heat to the surrounding gas molecules, causing a convective motion of gas and leading to the rotation of the micromotor. The light-driven motions of gas molecules were analyzed using molecular dynamics modeling.

© 2010 American Institute of Physics

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KEYWORDS and PACS

Keywords

convection, gold, micromotors, molecular dynamics method, nanoparticles, nanoporous materials, polymers

PACS

  • 85.85.+j

    Micro- and nano-electromechanical systems (MEMS/NEMS) and devices

  • 84.50.+d

    Electric motors

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3431741

PUBLICATION DATA

ISSN

0003-6951 (print)  
1077-3118 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

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    References

    R. Chern, X. Liu, and C. Chang, Phys. Rev. E 76, 016609 (2007).


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