In Situ Control of Underwater-Pinning of Organic Droplets on a Surfactant-Doped Conjugated Polymer Surface

• DOI: 10.1021/acsami.5b07589
• Publication Date: 2015-11-04T21:50:00Z
• Authors: Wei Xu; Jian Xu; Chang-Hwan Choi; Eui-Hyeok Yang
• Keywords: 02 engineering and technology; 0210 nano-technology; 6. Clean water

Controlling the pinning of organic droplets on solid surfaces is fundamental and practical interest in field material science engineering, which has numerous applications such as surface cleaning, water treatment, microfluidics. Here, a rapid situ control actuation demonstrated dodecylbenzenesulfonate-doped polypyrrole (PPy(DBS)) an aqueous environment via electrochemical redox process. A dramatic change results from transport DBS(-) molecules between PPy(DBS) environment, well simultaneous alternation oleophobicity to liquids during This droplet enables stop-and-go actuation, applicable both polar apolar droplets, at low voltages (∼0.9 V) with extremely roll-off angle (∼0.4°).