Adsorption, manipulation and self-assembling of TBrPP-Co molecules on a Ag/Si(111) surface by scanning tunnelling microscopy

Adsorption, manipulation and self-assembling of TBrPP-Co molecules on a Ag/Si(111) surface by scanning tunnelling microscopy
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通过扫描隧道显微镜在 Ag/Si(111) 表面上吸附、操纵和自组装 TBrPP-Co 分子

DOI:
10.1088/0957-4484/19/46/465707
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发表时间:
2008-11
期刊:
影响因子:
3.5
通讯作者:
Jia, Jin Feng
Jia, Jin Feng
中科院分区:
材料科学3区
文献类型:
--
作者:
Kim, Howon;Xue, Qi Kun;Li, Qing;Eguchi, Toyoaki;Kahng, Se-Jong;Hasegawa, Yukio;Yamazaki, Shiro;Jia, Jin Feng

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利用低温扫描隧道显微镜(STM)研究了5,10,15,20-四-(4-溴苯基)-卟啉- co (TBrPP-Co)分子在Si(111)- Ag重构表面的单独吸附和二维组装。所有分离的分子都被观察到具有轻微畸变的平面形状。分离的分子可以用STM尖端沿基底的三角晶格方向(方向)可控地旋转。随着覆盖面积的增加(0.07 ML)和适当的退火,分子聚集形成三种有序相。而在0.75 ML的覆盖范围内,长程有序结构消失。
Individual adsorption and two-dimensional assembling of 5,10,15,20-tetrakis-(4-bromophenyl)-porphyrin-Co (TBrPP-Co) molecules on a Si(111)- Ag reconstructed surface have been studied using low-temperature scanning tunnelling microscopy (STM). All the isolated molecules are observed in a planar shape with slight distortion. The isolated molecules can be controllably rotated with an STM tip to the orientation along the trigonal lattice ( direction) of the substrate. With an increased coverage (0.07 ML) and appropriate annealing, the molecules assemble to form three types of ordered phase. The long-range ordered structures, however, disappear at higher coverage (0.75 ML).
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