Orientational transition of tin phthalocyanine molecules in the self-assembled monolayer

Orientational transition of tin phthalocyanine molecules in the self-assembled monolayer
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自组装单分子层中锡酞菁分子的取向转变

DOI:
10.1088/1361-6463/ab6b98
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发表时间:
2020-01
期刊:
Journal of Physics D: Applied Physics
影响因子:
--
通讯作者:
Jun-Zhong Wang
Jun-Zhong Wang
中科院分区:
其他
文献类型:
--
作者:
Da-Xiao Yang;Zi-Long Wang;Ming-Xia Shi;Kai Sun;Min-Long Tao;Ji-Yong Yang;Jun-Zhong Wang

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有机分子的取向和自组装排列决定了薄膜的性质。本文报道了酞菁锡(SnPc)分子在Cd(0 0 0 1)表面自组装结构中的取向转变.在单层制度,低温沉积的SnPc分子形成紧密堆积相和有序阵列的七聚体,以及一个超致密的单层。特别地,密堆积相中的所有分子都是平的,七聚体中的七分之一的分子是倾斜的,而超密堆积相中的所有分子都是倾斜的。这些结果表明,SnPc的特定取向依赖于分子间和分子-基底界面相互作用之间的竞争。
The molecular orientations and self-assembled arrangements of organic molecules determine the properties of thin films. Here we report the orientational transitions of tin phthalocyanine (SnPc) molecules in the self-assembled structures on Cd (0 0 0 1) surfaces. In the monolayer regime, the low-temperature deposited SnPc molecules form a close-packed phase and ordered arrays of heptamers as well as an ultra-dense-packed monolayer. In particular, all molecules in the close-packed phase are flat-lying, and one seventh of the molecules in the heptamer are tilted, while all molecules in the ultra-dense-packed phase are tilted. These results demonstrate that the specific orientations of SnPc depend on the competition between intermolecular and molecule-substrate interfacial interactions.
DOI: 10.1103/physrevb.48.4729
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影响因子: --
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