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Scanning tunneling microscopy study of molecular growth structures of Gd@C82 on Cu(111) |
| Chen Jian (陈建)a b, Qin Zhi-Hui (秦志辉)a, Pan Jin-Bo (潘金波)c, Lu Shuang-Zan (卢双赞)a b, Du Shi-Xuan (杜世萱)c, Gao Hong-Jun (高鸿钧)c, Cao Geng-Yu (曹更玉)a |
a State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, China;
b University of Chinese Academy of Sciences, Beijing 100049, China;
c Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China |
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Abstract The coverage and temperature-dependent nucleation behaviors of the Gd@C82 metallofullerenes on Cu(111) have been studied by low-temperature scanning tunneling microscopy (LT-STM) in detail. Upon molecular deposition at low temperature, Gd@C82 molecules preferentially decorate the steps and nucleate into single layer islands with increasing coverage. Further annealing treatment leads some of the Gd@C82 molecules to assemble into bright and dim patches, which are correlated to the adsorption induced substrate reconstruction. Upon sufficient thermal activation, Gd@C82 molecules sink into the Cu(111) surface one-copper-layer-deep, forming hexagonal close-packed molecular islands with intra-molecular details observed as striped patterns. By considering the commensurability between the Gd@C82 nearest-neighbor distance and the lattice of the underlying Cu(111), we clearly identified two kinds of in-plane molecular arrangements as (√19×19)R23.4° and (19×19)R36.6° with respect to Cu(111). Within the assembled Gd@C82 molecular, island molecules with dim-bright contrast are spatially distributed, which may be modulated by the preexisted species on Cu(111).
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Received: 15 April 2013
Revised: 19 April 2013
Accepted manuscript online:
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PACS:
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68.55.ap
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(Fullerenes)
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64.75.Yz
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(Self-assembly)
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68.55.A-
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(Nucleation and growth)
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68.37.Ef
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(Scanning tunneling microscopy (including chemistry induced with STM))
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| Fund: Project supported by the National Natural Science Foundation of China (Grant No. 11004219) and MOST of China (Grant No. 2013CBA01600). |
Corresponding Authors:
Qin Zhi-Hui
E-mail: zhqin@wipm.ac.cn
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Cite this article:
Chen Jian (陈建), Qin Zhi-Hui (秦志辉), Pan Jin-Bo (潘金波), Lu Shuang-Zan (卢双赞), Du Shi-Xuan (杜世萱), Gao Hong-Jun (高鸿钧), Cao Geng-Yu (曹更玉) Scanning tunneling microscopy study of molecular growth structures of Gd@C82 on Cu(111) 2013 Chin. Phys. B 22 076802
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