Improvement of the tunable wettability property of poly(3-alkylthiophene) films

Peng Lin; Feng Yan; Helen L.W. Chan

doi:10.1021/la900387m

Improvement of the tunable wettability property of poly(3-alkylthiophene) films

Peng Lin, Feng Yan, Helen L.W. Chan

Research output: Journal article publication › Journal article › Academic research › peer-review

39 Citations (Scopus)

Abstract

The surface wettability properties of poly(3-alkylthiophene) (P3AT) can be reversibly switched between hydrophobic and hydrophilic states by a low-voltage electrochemical approach. The switching processes corresponding to the oxidation and deoxidation processes of the polymer films have been systematically studied. The tunable region of the contact angle of the polymer films is dependent on the type of dopant, and the biggest effect was induced by SO2-4doping, which changes the contact angle for about 30°. The tunable amplitude of the contact angle has been substantially enlarged by coating the polymer film on a substrate patterned with micrometer-sized posts, which shows a static contact angle of 147.4° at neutral state and 62.2° at oxidized state. It is envisaged that the polymer films have potential applications as low cost disposable wettability switches in microfluidics and contact-printing technology.

Original language	English
Pages (from-to)	7465-7470
Number of pages	6
Journal	Langmuir
Volume	25
Issue number	13
DOIs	https://doi.org/10.1021/la900387m
Publication status	Published - 7 Jul 2009

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics
Surfaces and Interfaces
Spectroscopy
Electrochemistry

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abstract = "The surface wettability properties of poly(3-alkylthiophene) (P3AT) can be reversibly switched between hydrophobic and hydrophilic states by a low-voltage electrochemical approach. The switching processes corresponding to the oxidation and deoxidation processes of the polymer films have been systematically studied. The tunable region of the contact angle of the polymer films is dependent on the type of dopant, and the biggest effect was induced by SO2-4doping, which changes the contact angle for about 30°. The tunable amplitude of the contact angle has been substantially enlarged by coating the polymer film on a substrate patterned with micrometer-sized posts, which shows a static contact angle of 147.4° at neutral state and 62.2° at oxidized state. It is envisaged that the polymer films have potential applications as low cost disposable wettability switches in microfluidics and contact-printing technology.",

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N2 - The surface wettability properties of poly(3-alkylthiophene) (P3AT) can be reversibly switched between hydrophobic and hydrophilic states by a low-voltage electrochemical approach. The switching processes corresponding to the oxidation and deoxidation processes of the polymer films have been systematically studied. The tunable region of the contact angle of the polymer films is dependent on the type of dopant, and the biggest effect was induced by SO2-4doping, which changes the contact angle for about 30°. The tunable amplitude of the contact angle has been substantially enlarged by coating the polymer film on a substrate patterned with micrometer-sized posts, which shows a static contact angle of 147.4° at neutral state and 62.2° at oxidized state. It is envisaged that the polymer films have potential applications as low cost disposable wettability switches in microfluidics and contact-printing technology.

AB - The surface wettability properties of poly(3-alkylthiophene) (P3AT) can be reversibly switched between hydrophobic and hydrophilic states by a low-voltage electrochemical approach. The switching processes corresponding to the oxidation and deoxidation processes of the polymer films have been systematically studied. The tunable region of the contact angle of the polymer films is dependent on the type of dopant, and the biggest effect was induced by SO2-4doping, which changes the contact angle for about 30°. The tunable amplitude of the contact angle has been substantially enlarged by coating the polymer film on a substrate patterned with micrometer-sized posts, which shows a static contact angle of 147.4° at neutral state and 62.2° at oxidized state. It is envisaged that the polymer films have potential applications as low cost disposable wettability switches in microfluidics and contact-printing technology.

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Improvement of the tunable wettability property of poly(3-alkylthiophene) films

Abstract

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