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论文类型：期刊论文

发表时间：2011-10-01

发表刊物：CHINESE SCIENCE BULLETIN

收录刊物：Scopus、SCIE

卷号：56

期号：28-29

页面范围：3082-3086

ISSN号：1001-6538

关键字：oscillation; sessile droplet; ac electric field; hydrophobic surface

摘要：We report a novel oscillatory behavior of a sessile droplet on a hydrophobic surface. The droplet was placed on an electrode with a hydrophobic surface and close to, but not touching, a second needle-like electrode. The change in the contact angle was observed only when the droplet oscillated. In a traditional electro-wetting experiment, however, the contact angle decreased immediately when an alternating current electric field was applied. In addition, the non-contact mode gave rise to a true sessile condition of the droplet, whose oscillation amplitude was not linearly proportional to the driving voltage but reached a maximum value.