中国物理B ›› 2015, Vol. 24 ›› Issue (3): 36802-036802.doi: 10.1088/1674-1056/24/3/036802

• CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES • 上一篇    下一篇

Water-assisted highly enhanced crystallographic etching of graphene by iron catalysts

薛磊江a, 余芳b, 周海青b, 孙连峰b   

  1. a College of Computer Science and Technology, Shandong University of Technology, Zibo 255049, China;
    b National Centre for Nanoscience and Technology, Beijing 100190, China
  • 收稿日期:2014-09-28 修回日期:2014-10-29 出版日期:2015-03-05 发布日期:2015-03-05
  • 基金资助:

    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).

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   

  1. a College of Computer Science and Technology, Shandong University of Technology, Zibo 255049, China;
    b National Centre for Nanoscience and Technology, Beijing 100190, China
  • Received:2014-09-28 Revised:2014-10-29 Online:2015-03-05 Published:2015-03-05
  • Contact: Zhou Hai-Qing, Sun Lian-Feng E-mail:hqzhou0817@gmail.com;slf@nanoctr.cn
  • Supported by:

    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).

摘要:

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.

关键词: graphene, Raman spectra, iron catalysts

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.

Key words: graphene, Raman spectra, iron catalysts

中图分类号:  (Graphene films)

  • 68.65.Pq
78.30.-j (Infrared and Raman spectra) 81.65.Cf (Surface cleaning, etching, patterning)