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Applied Physics Letters / Volume 96 / Issue 22 / NANOSCALE SCIENCE AND DESIGN

Appl. Phys. Lett. 96, 223104 (2010); http://dx.doi.org/10.1063/1.3443633 (3 pages)

Bubble generation in a nanoconfined liquid film between dielectric-coated electrodes under alternating current electric fields

Guoxin Xie, Jianbin Luo, Shuhai Liu, Dan Guo, and Chenhui Zhang

State Key Laboratory of Tribology, Tsinghua University, Beijing 100084, People's Republic of China

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(Received 4 February 2010; accepted 12 May 2010; published online 2 June 2010)

In this letter, the bubble generation behavior in a nanoconfined liquid film under external alternating current (ac) electric fields (EEFs) has been investigated with the relative optical interference intensity technique. A counterintuitive phenomenon has been found that bubbles generate more easily and intensively when the electrode is coated with a dielectric coating while the total electrical power in the system is significantly lower than the case without the coating. The bubble generation under ac EEFs has been found to be highly ac frequency dependent. The variations in the threshold external voltage and current beyond which bubbles begin to generate with the frequency become more significant in the system with a dielectric-coated electrode. Mechanisms of these experimental phenomena have been discussed.

© 2010 American Institute of Physics

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KEYWORDS and PACS

Keywords

bubbles, coatings, dielectric thin films, electrochemical electrodes, liquid films

PACS

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3443633

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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