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Water-assisted highly enhanced crystallographic etching of graphene by iron catalysts |
| Xue Lei-Jiang (薛磊江)a, Yu Fang (余芳)b, Zhou Hai-Qing (周海青)b, Sun Lian-Feng (孙连峰)b |
a College of Computer Science and Technology, Shandong University of Technology, Zibo 255049, China;
b National Centre for Nanoscience and Technology, Beijing 100190, China |
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Abstract We report the assisted role of water vapor in crystallographic cutting of graphene via iron catalysts in reduced atmosphere. Without water, graphene can be tailored with smooth trenches composed of straight lines with angles of 60° or 120° between two adjacent trenches. After the addition of water, new chacteristics are found: such as almost no iron particles can be detected along the trenches; each trench becomes longer and lots of graphene nanoribbons can be generated. The underlying mechanism is proposed and discussed, which is attributed to stimulating and lengthening of the catalytic activity of iron particles by water vapor.
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Received: 28 September 2014
Revised: 29 October 2014
Accepted manuscript online:
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PACS:
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68.65.Pq
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(Graphene films)
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78.30.-j
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(Infrared and Raman spectra)
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81.65.Cf
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(Surface cleaning, etching, patterning)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant No. 10774032) and the Instrument Developing Project of the Chinese Academy of Sciences (Grant No. Y2010031). |
Corresponding Authors:
Zhou Hai-Qing, Sun Lian-Feng
E-mail: hqzhou0817@gmail.com;slf@nanoctr.cn
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Cite this article:
Xue Lei-Jiang (薛磊江), Yu Fang (余芳), Zhou Hai-Qing (周海青), Sun Lian-Feng (孙连峰) Water-assisted highly enhanced crystallographic etching of graphene by iron catalysts 2015 Chin. Phys. B 24 036802
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