Chin. Phys. Lett.  2013, Vol. 30 Issue (5): 056802    DOI: 10.1088/0256-307X/30/5/056802
Visualization of a Maze-Like Reconstruction of Graphene on a Copper Surface at the Atomic Scale
XIE Nan1,2, GONG Hui-Qi2, ZHOU Zhi2, GUO Xiao-Dong2, YAN Shi-Chao2, SUN Qian1, XING Sirui3, WU Wei3, PEI Shin-shem3, BAO Jiming3, SHAN Xin-Yan2, GUO Yang2**, LU Xing-Hua2**
1The MOE Key Laboratory of Weak-Light Nonlinear Photonics, Tianjin Key Laboratory of Photonics Materials and Technology for Information Science, School of Physics, Nankai University, Tianjin 300071
2Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190
3Department of Electrical and Computer Engineering, University of Houston, Houston, TX 77204, USA
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XIE Nan, GONG Hui-Qi, ZHOU Zhi et al  2013 Chin. Phys. Lett. 30 056802
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Interaction with the substrate plays an essential role in determining the structure and electronic property of graphene supported by a surface. We observe a maze-like reconstruction pattern in graphene on flat copper foil. With functionalized scanning tunneling microscope tips, a triangular three-for-six structure of graphene and a mixed (2√2 ×√2 )R45° reconstruction of a Cu(100) surface are separately visualized at the atomic scale. Substrate-induced changes in the structure and electronic property are further illustrated by micro-Raman spectroscopy and scanning tunneling spectroscopy. This finding suggests a new method to effectively induce partial sp3 hybridization in a single-layer graphene and therefore to tune its electronic property through interaction with the substrate.

Received: 28 January 2013      Published: 31 May 2013
PACS:  68.65.Pq (Graphene films)  
  68.47.De (Metallic surfaces)  
  68.37.Ef (Scanning tunneling microscopy (including chemistry induced with STM))  
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GUO Xiao-Dong
YAN Shi-Chao
SUN Qian
XING Sirui
WU Wei
PEI Shin-shem
BAO Jiming
SHAN Xin-Yan
GUO Yang
LU Xing-Hua

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