Wetting and electrowetting properties of carbon nanotube templated parylene films

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Author(s)

  • Zuankai Wang
  • Ya Ou
  • Toh-Ming Lu
  • Nikhil Koratkar

Detail(s)

Original languageEnglish
Pages (from-to)4296-4299
Journal / PublicationJournal of Physical Chemistry B
Volume111
Issue number17
Publication statusPublished - 3 May 2007
Externally publishedYes

Abstract

In this study, we compared the wetting and electrowetting properties of a planar parylene (poly(p-xylylene)) film to those of a nanostructured parylene film. To generate the nanostructured film, we used an aligned array of multiwalled carbon nanotubes as a template; a thin coating of parylene was deposited on the nanotube template to generate a parylene film with a nanoscale roughness structure. Static contact angle measurements indicated a very significant increase in the water contact angle from ∼73° for planar parylene to ∼110° for the nanotemplated parylene. In addition, we performed electrowetting experiments to dynamically tune the contact angle by application of electric potential. Interestingly, the flat parylene film showed contact angle saturation at an applied voltage of ≥40 V, while the nanotemplated parylene film did not experience saturation in the contact angle response even for voltages up to 80 V. These results show that engineering a nanoscale roughness structure to a polymer film results in significant changes to the wetting and electrowetting properties of the polymer. © 2007 American Chemical Society.

Citation Format(s)

Wetting and electrowetting properties of carbon nanotube templated parylene films. / Wang, Zuankai; Ou, Ya; Lu, Toh-Ming et al.
In: Journal of Physical Chemistry B, Vol. 111, No. 17, 03.05.2007, p. 4296-4299.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review