Step-by-step self-assembly of manganese phthalocyanine on Bi(111) surface: From single molecule to two-dimensional domains
Step-by-step self-assembly of manganese phthalocyanine on Bi(111) surface: From single molecule to two-dimensional domains
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Bi(111)表面锰酞菁的逐步自组装:从单分子到二维域
DOI:
10.1016/j.apsusc.2014.08.198
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发表时间:
2014-10
影响因子:
6.7
通讯作者:
Wang, Jun-Zhong
中科院分区:
文献类型:
--
作者:
Wang, Chun-Jie;Sun, Kai;Yuan, Hong-Kuan;Wang, Jun-Zhong
The adsorption and self-assembly of manganese phthalocyanine (MnPc) molecules on Bi(1 1 1) are investigated by means of low-temperature scanning tunneling microscope (STM). At low temperature (4.6 K), isolated MnPc molecules adsorb flatly on Bi(1 1 1) with the two opposing lobes aligned in the direction of surface base vectors. When temperature is increased to 78 K, individual MnPc molecules rotate around the central Mn ion until they meet other MnPc molecules forming self-assembled structures. With the coverage increasing, MnPc molecules show a structural evolution from single molecules to molecular chains, and finally to 2-D domains. In particular, high-resolution STM images reveal there are two mirrored molecular chains with alternating arrangement in the 2-D domains. Annealing the sample to room temperature leads to a phase separation such that each molecule chains appeared only in the respective domains.
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