Surface energy engineering of graphene

Details Surface energy engineering of graphene Surface energy engineering of graphene

2011-03-24

arxiv.org/abs/1103.4667v1

Langmuir, 2010, 26 (6), pp 3798-3802

Physics

Condensed Matter

Materials Science

Scientific paper

10.1021/la100231u

Contact angle goniometry is conducted for epitaxial graphene on SiC. Although only a single layer of epitaxial graphene exists on SiC, the contact angle drastically changes from 69{\deg} on SiC substrates to 92{\deg} with graphene. It is found that there is no thickness dependence of the contact angle from the measurements of single, bi, and multi layer graphene and highly ordered pyrolytic graphite (HOPG). After graphene is treated with oxygen plasma, the level of damage is investigated by Raman spectroscopy and correlation between the level of disorder and wettability is reported. By using low power oxygen plasma treatment, the wettability of graphene is improved without additional damage, which can solve the adhesion issues involved in the fabrication of graphene devices.

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