中国物理B ›› 2013, Vol. 22 ›› Issue (7): 76802-076802.doi: 10.1088/1674-1056/22/7/076802

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Scanning tunneling microscopy study of molecular growth structures of Gd@C82 on Cu(111)

陈建a b, 秦志辉a, 潘金波c, 卢双赞a b, 杜世萱c, 高鸿钧c, 曹更玉a   

  1. 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
  • 收稿日期:2013-04-15 修回日期:2013-04-19 出版日期:2013-06-01 发布日期:2013-06-01
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 11004219) and MOST of China (Grant No. 2013CBA01600).

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   

  1. 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
  • Received:2013-04-15 Revised:2013-04-19 Online:2013-06-01 Published:2013-06-01
  • Contact: Qin Zhi-Hui E-mail:zhqin@wipm.ac.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 11004219) and MOST of China (Grant No. 2013CBA01600).

摘要: 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).

关键词: metallofullerene, self-assembly, nucleation behaviors, scanning tunneling microscopy

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).

Key words: metallofullerene, self-assembly, nucleation behaviors, scanning tunneling microscopy

中图分类号:  (Fullerenes)

  • 68.55.ap
64.75.Yz (Self-assembly) 68.55.A- (Nucleation and growth) 68.37.Ef (Scanning tunneling microscopy (including chemistry induced with STM))