@inproceedings{51346b0ae31c47a8a442d77d35c33df1,
title = "Water droplet manipulation by tunable wetting on smart polymer at ultra-low voltages",
abstract = "In this paper, we report experimental results and analyses on the controlled manipulation of liquid droplets using local reduction and oxidation (redox) processes of conjugated polymers of dodecylbenzenesulfonate doped polypyrrole (PPy(DBS)). The electrochemically tunable wetting property of PPy(DBS) permitted the manipulation of an organic droplet of dichloromethane (DCM) at very low voltages (<0.6V). Our experimental results illustrate that, upon the reduction of PPy(DBS), the surface tension gradient across the droplet contact line induced Marangoni stress and caused the deformation of droplets even at low voltages. We envision that the electrochemical redox process on smart polymers demonstrated in this work can open a new door to a low voltage manipulation of liquid droplets for digital microfluidic applications.",
keywords = "Conjugated polymers, Digital microfluidics, Droplet actuation, Marangoni stress, Microchannel, Tunable wetting",
author = "Tsai, {Yao Tsan} and Choi, {Chang Hwan} and Yang, {Eui Hyeok}",
year = "2012",
language = "English",
isbn = "9780979806452",
series = "Proceedings of the 16th International Conference on Miniaturized Systems for Chemistry and Life Sciences, MicroTAS 2012",
pages = "863--865",
booktitle = "Proceedings of the 16th International Conference on Miniaturized Systems for Chemistry and Life Sciences, MicroTAS 2012",
note = "16th International Conference on Miniaturized Systems for Chemistry and Life Sciences, MicroTAS 2012 ; Conference date: 28-10-2012 Through 01-11-2012",
}