Electrically Conductive PEDOT Coating with Self-Healing
Superhydrophobicity
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Abstract
A self-healing electrically conductive
superhydrophobic poly(3,4-ethylenedioxythiophene)
(PEDOT) coating has been prepared by chemical vapor deposition of
a fluoroalkylsilane (POTS) onto a PEDOT film, which was obtained by
electrochemical deposition. The coating not only maintained high conductivity
with a low resistivity of 3.2 × 10<sup>–4</sup> Ω·m,
but also displayed a water contact angle larger than 156° and
a sliding angle smaller than 10°. After being etched with O<sub>2</sub> plasma, the coating showed an excellent self-healing ability,
spontaneously regaining its superhydrophobicity when left under ambient
conditions for 20 h. This superhydrophobicity recovery process was
found to be humidity-dependent, and could be accelerated and completed
within 2 h under a high humidity of 84%. The coating also exhibited
good superhydrophobicity recovering ability after being corroded by
strong acid solution at pH 1 or strong base solution at pH 14 for
3 h