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

Li-Hsin Han; Shaomin Wu; Condit, J. Christopher; Kemp, Nate J.; Milner, Thomas E.; Feldman, Marc D.; Shaochen Chen
May 2010
Applied Physics Letters;5/24/2010, Vol. 96 Issue 21, p213509
Academic Journal
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.


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