Journal
NANOSCALE
Volume 7, Issue 6, Pages 2561-2567Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4nr06759b
Keywords
-
Categories
Funding
- National Natural Science Foundation of China (NSFC) [11202213, 11372313]
- Chinese Academy of Sciences [KJZD-EW-M01, Y2010031]
Ask authors/readers for more resources
The statics and dynamics of electrowetting on pillar-arrayed surfaces at the nanoscale are studied using molecular dynamics simulations. Under a gradually increased electric field, a droplet is pushed by the electromechanical force to spread, and goes through the Cassie state, the Cassie-to-Wenzel wetting transition and the Wenzel state, which can be characterized by the electrowetting number at the micro-scale eta(m). The expansion of the liquid is direction-dependent and influenced by the surface topology. A positive voltage is induced in the bulk droplet, while a negative one is induced in the liquid confined among the pillars, which makes the liquid hard to spread and further polarize. Based on the molecular kinetic theory and the wetting states, theoretical models have been proposed to comprehend the physical mechanisms in the statics and dynamics of electrowetting, and are validated by our simulations. Our findings may help to understand the electrowetting on microtextured surfaces and assist the future design of engineered surfaces in practical applications.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available