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タイトル: Unidirectional molecular assembly alignment on graphene enabled by nanomechanical symmetry breaking
著者: Hong, Liu
Nishihara, Taishi
Hijikata, Yuh
Miyauchi, Yuhei  kyouindb  KAKEN_id
Itami, Kenichiro
著者名の別形: 宮内, 雄平
発行日: 5-Feb-2018
出版者: Springer Nature
誌名: Scientific Reports
巻: 8
論文番号: 2333
抄録: Precise fabrication of molecular assemblies on a solid surface has long been of central interest in surface science. Their perfectly oriented growth only along a desired in-plane direction, however, remains a challenge, because of the thermodynamical equivalence of multiple axis directions on a solid-surface lattice. Here we demonstrate the successful fabrication of an in-plane, unidirectional molecular assembly on graphene. Our methodology relies on nanomechanical symmetry breaking effects under atomic force microscopy tip scanning, which has never been used in molecular alignment. Individual one-dimensional (1D) molecular assemblies were aligned along a selected symmetry axis of the graphene lattice under finely-tuned scanning conditions after removing initially-adsorbed molecules. Experimental statistics and computational simulations suggest that the anisotropic tip scanning locally breaks the directional equivalence of the graphene surface, which enables nucleation of the unidirectional 1D assemblies. Our findings will open new opportunities in the molecular alignment control on various atomically flat surfaces.
URI: http://hdl.handle.net/2433/234678
DOI(出版社版): 10.1038/s41598-018-20760-z
PubMed ID: 29402969
出現コレクション:学術雑誌掲載論文等

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