Scanning tunneling microscopy study of molecular growth structures of Gd@C82 on Cu(111) |
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引用本文: | 陈建,秦志辉,潘金波,卢双赞,杜世萱,高鸿钧,曹更玉.Scanning tunneling microscopy study of molecular growth structures of Gd@C82 on Cu(111)[J].中国物理 B,2013(7):32-36. |
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作者姓名: | 陈建 秦志辉 潘金波 卢双赞 杜世萱 高鸿钧 曹更玉 |
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作者单位: | [1]State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, China [2]University of Chinese Academy of Sciences, Beijing 100049, China [3]Institute of Physics, Chinese Academy of Sciences, Beijing 1 O0190, China |
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基金项目: | the National Natural Science Foundation of China(Grant No.11004219);MOST of China(Grant No.2013CBA01600) |
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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(1/2)×19(1/2))R23.4°and (19(1/2)×19(1/2))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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关 键 词: | 扫描隧道显微镜 分子沉积 Gd 铜层 Cu(111) 生长 结构 分子组装 |
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