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Issue 3, 2016
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Investigations on the wettability of graphene on a micron-scale hole array substrate

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Abstract

In this work, graphene grown by chemical vapour deposition is transferred onto a micron-scale hole array (MSHA) substrate by a polymer-free transfer process. The graphene adheres to the walls of the microholes and complies with the morphologies of the micron-scale hole substrate. In contrast to previous reports of the partial-transparency of the wettability of graphene on a plane substrate, the wettability of graphene on a micro-scale hole array substrate is found to be hydrophobic with a contact angle of 93.1°. This is quite different from that of graphene on a planar SiO2/Si substrate, which is hydrophilic with a contact angle of 83.0°. We find that a micron-scale hole array substrate has a regulation effect on the wettability of graphene when the graphene almost completely complies with the morphology of the micron-scale hole array substrate surface and the change from hydrophilic to hydrophobic provides a guide for designing surfaces with controllable wettability.

Graphical abstract: Investigations on the wettability of graphene on a micron-scale hole array substrate

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Article information


Submitted
15 Jul 2015
Accepted
18 Dec 2015
First published
22 Dec 2015

RSC Adv., 2016,6, 1999-2003
Article type
Communication
Author version available

Investigations on the wettability of graphene on a micron-scale hole array substrate

Y. Zhao, G. Wang, W. Huang, X. Fan, Y. Deng, J. Zhang, T. Wei, R. Duan, J. Wang and L. Sun, RSC Adv., 2016, 6, 1999
DOI: 10.1039/C5RA13916C

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