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Rodney S. Ruoff
다차원 탄소재료 연구단
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Simultaneous Electrochemical Reduction and Delamination of Graphene Oxide Films

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Title
Simultaneous Electrochemical Reduction and Delamination of Graphene Oxide Films
Author(s)
Xiaohan Wang; Iskandar Kholmanov; Harry Chou; Rodney S. Ruoff
Publication Date
2015-09
Journal
ACS NANO, v.9, no.9, pp.8737 - 8743
Publisher
AMER CHEMICAL SOC
Abstract
Here we report an electrochemical method to simultaneously reduce and delaminate graphene oxide (G-O) thin films deposited on metal (Al and Au) substrates. During the electrochemical reaction, interface charge transfer between the G-O thin film and the electrode surface was found to be important in eliminating oxygen-containing groups, yielding highly reduced graphene oxide (rG-O). In the meantime, hydrogen bubbles were electrochemically generated at the rG-O film/electrode interface, propagating the film delamination. Unlike other metal-based G-O reduction methods, the metal used here was either not etched at all (for Au) or etched a small amount (for Al), thus making it possible to reuse the substrate and lower production costs. The delaminated rG-O film exhibits a thickness-dependent degree of reduction: greater reduction is achieved in thinner films. The thin rG-O films having an optical transmittance of 90% (λ = 550 nm) had a sheet resistance of 6390 ± 447 ω/ (ohms per square). rG-O-based stretchable transparent conducting films were also demonstrated. © 2015 American Chemical Society
URI
https://pr.ibs.re.kr/handle/8788114/1897
ISSN
1936-0851
Appears in Collections:
Center for Multidimensional Carbon Materials(다차원 탄소재료 연구단) > Journal Papers (저널논문)
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