@article { ISI:000351551800013,
	title = {Hysteretic DC electrowetting by field-induced nano-structurations on polystyrene films},
	journal = {Soft Matter},
	volume = {11},
	number = {13},
	year = {2015},
	month = {FEB},
	pages = {2655-2664},
	publisher = {ROYAL SOC CHEMISTRY},
	address = {THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND},
	abstract = {<p>Electrowetting (EW) offers executive wetting control of conductive liquids on several polymer surfaces. We report a peculiar electrowetting response for aqueous drops on a polystyrene (PS) dielectric surface in the presence of silicone oil. After the first direct current (DC) voltage cycle, the droplet failed to regain Young{\textquoteright}s angle, yielding contact angle hysteresis, which is close to a value found in ambient air. We conjecture that the hysteretic EW response appears from in situ surface modification using electric field induced water-ion contact with PS surface inducing nano-structuration by electro-hydrodynamic (EHD) instability. Atomic force microscopy confirms the formation of nano-structuration on the electrowetted surface. The effects of molecular weight, applied electric field, water conductivity and pH on nano-structuration are studied. Finally, the EW based nano-structuration on PS surface is used for the enhanced loading of aqueous dyes on hydrophobic surfaces.</p>},
	issn = {1744-683X},
	doi = {10.1039/c5sm00007f},
	author = {Sawane, Yogesh B. and Datar, Suwarna and Ogale, Satishchandra B. and Banpurkar, Arun G.}
}
