Electro-Responsively Reversible Transition of Polythiophene Films from Superhydrophobicity to Superhydrophilicity

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• 作者：Lianyi Xu ; Qiang Ye ; Xuemin Lu ; Qinghua Lu
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2014
• 出版时间：August 27, 2014
• 年：2014
• 卷：6
• 期：16
• 页码：14736-14743
• 全文大小：535K
• ISSN：1944-8252

文摘

An electro-responsively reversible switching of wettability between superhydrophobicity and superhydrophilicity has been obtained from a highly porous structured polythiophene film. The polythiophene film was prepared by two-step electrochemical deposition on an indium tin oxide (ITO) substrate. The underlying poly(3,4-ethylenedioxythiophene) (PEDOT) provides a highly porous structured conductive support, and poly(3-methylthiophene) (P(3-MTH)) deposited thereon plays the role of a low-surface-energy conductive coating. The wettability switching of this double-layer film between superhydrophobicity and superhydrophilicity has been investigated by doping and dedoping in an electrolyte solution containing ClO₄鈥?/sup>. Electrochromism of the film was also seen to accompany the electrochemical process of conversion between the two superwetting states. On the basis of this porous electro-active film, an in situ electro-wetting device was also demonstrated.

Keywords:

polythiophene film; wettability transition; superhydrophobicity; superhydrophilicity; surface chemistry