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Materials 2017, 10(1), 86; doi:10.3390/ma10010086

Synthesis of Graphene Based Membranes: Effect of Substrate Surface Properties on Monolayer Graphene Transfer

1
Department of Mechanical Engineering, King Fahd University of Petroleum & Minerals, Dhahran 31261, Saudi Arabia
2
Department of Mechanical Design and Production Engineering, Zagazig University, Zagazig 44519, Egypt
3
Qatar Environment and Energy Research Institute, HBKU, Qatar Foundation, P.O. Box 5825, Doha, Qatar
*
Authors to whom correspondence should be addressed.
Academic Editor: Der-Jang Liaw
Received: 19 September 2016 / Revised: 10 January 2017 / Accepted: 17 January 2017 / Published: 21 January 2017
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Abstract

In this work, we report the transfer of graphene onto eight commercial microfiltration substrates having different pore sizes and surface characteristics. Monolayer graphene grown on copper by the chemical vapor deposition (CVD) process was transferred by the pressing method over the target substrates, followed by wet etching of copper to obtain monolayer graphene/polymer membranes. Scanning electron microscopy (SEM), atomic force microscopy (AFM), and contact angle (CA) measurements were carried out to explore the graphene layer transferability. Three factors, namely, the substrate roughness, its pore size, and its surface wetting (degree of hydrophobicity) are found to affect the conformality and coverage of the transferred graphene monolayer on the substrate surface. A good quality graphene transfer is achieved on the substrate with the following characteristics; being hydrophobic (CA > 90°), having small pore size, and low surface roughness, with a CA to RMS (root mean square) ratio higher than 2.7°/nm. View Full-Text
Keywords: graphene transfer; graphene membrane; microfiltration membrane; hydrophobic; surface roughness graphene transfer; graphene membrane; microfiltration membrane; hydrophobic; surface roughness
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MDPI and ACS Style

Kafiah, F.; Khan, Z.; Ibrahim, A.; Atieh, M.; Laoui, T. Synthesis of Graphene Based Membranes: Effect of Substrate Surface Properties on Monolayer Graphene Transfer. Materials 2017, 10, 86.

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