Details

Autor(en) / Beteiligte

• Halldorsson, Jennifer A.
• Wu, Yanzhe
• Brown, Hugh R.
• Spinks, Geoffrey M.
• Wallace, Gordon G.

Titel

Surfactant-controlled shape change of organic droplets using polypyrrole

Ist Teil von

• Thin solid films, 2011-07, Vol.519 (19), p.6486-6491

Ort / Verlag

Amsterdam: Elsevier B.V

Erscheinungsjahr

2011

Link zum Volltext

Quelle

ScienceDirect Journals (5 years ago - present)

Beschreibungen/Notizen

• Control of the shape and position of organic droplets has been investigated using polypyrrole doped with the surfactant dodecylbenzenesulfonate (PPy.DBS). Ex-situ contact angle measurements of electrochemically-reduced PPy.DBS revealed a dramatic increase in wettability compared to the oxidised polymer, attributable to dopant reorientation and cation incorporation during the reduction process. In-situ studies showed that droplets of dichloromethane resting upon PPy.DBS electrodes and immersed in an aqueous electrolyte changed shape dramatically upon electrochemical reduction of the polymer. A mechanism for the unusual and unexpected changes in drop shape is presented. Controlled release of the surfactant dopant into the electrolyte upon reduction of PPy.DBS and subsequent doping of the polymer upon oxidation were found to affect the droplet shape.