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Chin. Phys. B, 2014, Vol. 23(8): 088108    DOI: 10.1088/1674-1056/23/8/088108

Effects of graphene defects on Co cluster nucleation and intercalation

Xu Wen-Yan (徐文焱)a b, Huang Li (黄立)a b, Que Yan-De (阙炎德)a b, Lin Xiao (林晓)b a, Wang Ye-Liang (王业亮)a b, Du Shi-Xuan (杜世萱)a b, Gao Hong-Jun (高鸿钧)a b
a Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
b University of Chinese Academy of Sciences, Beijing 100049, China
Abstract  Four kinds of defects are observed in graphene grown on Ru (0001) surfaces. After cobalt deposition at room temperature, the cobalt nanoclusters are preferentially located at the defect position. By annealing at 530 ℃, cobalt atoms intercalate at the interface of Graphene/Ru (0001) through the defects. Further deposition and annealing increase the sizes of intercalated Co islands. This provides a method of controlling the arrangement of cobalt nanoclusters and also the density and the sizes of intercalated cobalt islands, which would find potential applications in catalysis industries, magnetism storage, and magnetism control in future information technology.
Keywords:  graphene      defects      cobalt      intercalation      scanning tunneling microscopy  
Received:  09 April 2014      Revised:  04 May 2014      Accepted manuscript online: 
PACS:  81.05.ue (Graphene)  
  87.64.Dz (Scanning tunneling and atomic force microscopy)  
  68.55.Ln (Defects and impurities: doping, implantation, distribution, concentration, etc.) (Other materials)  
Fund: Project supported by Funds from the Ministry of Science and Technology of China (Grant Nos. 2013CBA01600 and 2011CB932700), the National Natural Science Foundation of China (Grant Nos. 61222112 and 11334006), and the Funds from the Chinese Academy of Sciences.
Corresponding Authors:  Lin Xiao, Wang Ye-Liang, Gao Hong-Jun     E-mail:;;

Cite this article: 

Xu Wen-Yan (徐文焱), Huang Li (黄立), Que Yan-De (阙炎德), Lin Xiao (林晓), Wang Ye-Liang (王业亮), Du Shi-Xuan (杜世萱), Gao Hong-Jun (高鸿钧) Effects of graphene defects on Co cluster nucleation and intercalation 2014 Chin. Phys. B 23 088108

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