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Proceedings Paper

Pushing or pulling droplets on ZnO nanorods with an UV light
Author(s): Chien-Wei Liu; Chen-Pin Hsu; Jer-Liang Andrew Yeh; Yuh-Chang Sun; Yu-Fen Huang; Byung Hwan Chu; Fan Ren; Yu-Lin Wang
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Paper Abstract

Water droplets were either pushed or pulled with an UV light on the surface of vertically aligned and superhydrophobic ZnO nanorods (NRs). The contact angle of the droplets reduce to a lower value due to the absorption of UV by ZnO NRs and a circulating current was observed inside the droplet. The droplets were either pushed away from or pulled toward to the center of the UV light depending on the locations of the droplets to the UV light. It is obvious that in the pushing mode, the circulating current dominate the direction of the movement of the droplets, while in the pulling mode, the contact angle change dominate the direction of the droplet movement

Paper Details

Date Published: 15 October 2012
PDF: 7 pages
Proc. SPIE 8463, Nanoengineering: Fabrication, Properties, Optics, and Devices IX, 846306 (15 October 2012); doi: 10.1117/12.929901
Show Author Affiliations
Chien-Wei Liu, National Tsing Hua Univ. (Taiwan)
Chen-Pin Hsu, National Tsing Hua Univ. (Taiwan)
Jer-Liang Andrew Yeh, National Tsing Hua Univ. (Taiwan)
Yuh-Chang Sun, National Tsing Hua Univ. (Taiwan)
Yu-Fen Huang, National Tsing Hua Univ. (Taiwan)
Byung Hwan Chu, Univ. of Florida (United States)
Fan Ren, Univ. of Florida (United States)
Yu-Lin Wang, National Tsing Hua Univ. (Taiwan)

Published in SPIE Proceedings Vol. 8463:
Nanoengineering: Fabrication, Properties, Optics, and Devices IX
Elizabeth A. Dobisz; Louay A. Eldada, Editor(s)

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