The extended growth of graphene oxide flakes using ethanol CVD
journal contributionposted on 14.08.2013, 09:04 by Jingfeng Huang, Melanie Larisika, Derrick W.H. Fam, Qiyuan He, Myra A. Nimmo, Christoph Nowak, Alfred I.Y. Tok
We report the extended growth of Graphene Oxide (GO) flakes using atmospheric pressure ethanol Chemical Vapor Deposition (CVD). GO was used to catalyze the deposition of carbon on substrate in the ethanol CVD with Ar and H2 as carrier gases. Raman, SEM, XPS 10 and AFM characterized the growth to be reduced GO (RGO) of <5 layers. This new grown RGO possesses lower defect density with larger and increased distribution of sp2 domains than chemically-reduced RGO. Furthermore this method without optimization reduces relative standard deviation of electrical conductivity between chips, from 80.5% to 16.5%, enabling RGO to be used in practical electronic devices.
The authors are grateful for the funding from the Institute for Sports Research (ISR) of Nanyang Technological University (NTU) and the International Graduate School Bio-Nano-Tech; 5 a joint program of University of Natural Resources and Life Sciences Vienna (BOKU), the Austrian Institute of Technology (AIT) and NTU.
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