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Small. 2015 Dec 16;11(47):6302-8. doi: 10.1002/smll.201502013. Epub 2015 Nov 2.

Direct Synthesis of Few-Layer Graphene on NaCl Crystals.

Author information

1
Center for Nanochemistry (CNC), Beijing National Laboratory for Molecular Sciences, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, P. R. China.
2
Centre of Polymer and Carbon Materials, Polish Academy of Sciences, M. Curie-Sklodowskiej 34, Zabrze, 41-819, Poland.
3
Department of Energy Science, Sungkyunkwan University, Suwon, 440-746, Republic of Korea.
4
Department of Physics, Sungkyunkwan University, Suwon, 440-746, Republic of Korea.
5
Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing, 100871, P. R. China.
6
Department of Aerospace and Mechanical Engineering, West Virginia University, Morgantown, WV, 26507, USA.
7
US Department of Energy, NETL, Morgantown, WV, 26507, USA.

Abstract

Chemical vapor deposition is used to synthesize few-layer graphene on micro crystalline sodium chloride (NaCl) powder. The water-soluble nature of NaCl makes it convenient to produce free standing graphene layers via a facile and low-cost approach. Unlike traditional metal-catalyzed or oxygen-aided growth, the micron-size NaCl crystal planes play an important role in the nucleation and growth of few-layer graphene. Moreover, the possibility of synthesizing cuboidal graphene is also demonstrated in the present approach for the first time. Raman spectroscopy, optical microscopy, scanning electron microscopy, transmission electron microscopy, and atomic force microscopy are used to evaluate the quality and structure of the few-layer graphene along with cuboidal graphene obtained in this process. The few-layer graphene synthesized using the present method has an adsorption ability for anionic and cationic dye molecules in water. The present synthesis method may pave a facile way for manufacturing few-layer graphene on a large scale.

KEYWORDS:

chemical vapor deposition; cuboid structures; graphene; water-soluble substrates

PMID:
26524105
DOI:
10.1002/smll.201502013

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