title: Electrowetting on a lotus leaf.
abstract: Electrowetting on dielectrics has been widely used to manipulate and control microliter or nanoliter liquids in micro-total-analysis systems and laboratory on a chip. We carried out experiments on electrowetting on a lotus leaf, which is quite different from the equipotential plate used in conventional electrowetting. This has not been reported in the past. The lotus leaf is superhydrophobic and a weak conductor, so the droplet can be easily actuated on it through electrical potential gradient. The capillary motion of the droplet was recorded by a high-speed camera. The droplet moved toward the counterelectrode to fulfill the actuation. The actuation speed could be of the order of 10 mms. The actuation time is of the order of 10 ms.
authors.affiliation: State Key Laboratory of Nonlinear Mechanics (LNM), Institute of Mechanics,Chinese Academy of Sciences, Beijing 100190, People's Republic of China.
authors.forename: Jiang-Tao
authors.initials: JT
authors.lastname: Feng
authors.forename: Feng-Chao
authors.initials: FC
authors.lastname: Wang
authors.forename: Ya-Pu
authors.initials: YP
authors.lastname: Zhao
references.citation: Science. 1999 Jan 1;283(5398):57-60
references.pmid: 9872739
references.citation: Nano Lett. 2007 Mar;7(3):813-7
references.pmid: 17302459
references.citation: J Am Chem Soc. 2005 Apr 27;127(16):5736-7
references.pmid: 15839641
references.citation: Proc Natl Acad Sci U S A. 1996 May 28;93(11):5556-61
references.pmid: 8643614
references.citation: Phys Rev E Stat Phys Plasmas Fluids Relat Interdiscip Topics. 1999 Sep;60(3):2964-72
references.pmid: 11970102
references.citation: J Colloid Interface Sci. 2007 Feb 15;306(2):368-78
references.pmid: 17109875
references.citation: Lab Chip. 2008 May;8(5):672-7
references.pmid: 18432335