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Temperature dependent 2D self-assembled motif transition of copper-phthalocyanine derivates at air/HOPG interface: An STM study
Wang, Yamin; Xu, Hongbo; Wang, Huanhuan; Li, Shouzhu; Gan, Wei; Yuan, Qunhui; Gan, W.
2014
Source PublicationRSC Advances
ISSN2046-2069
Volume4Issue:39Pages:20256-20261
AbstractIt is known that copper(ii) 2,3,9,10,16,17,23,24-octakis(octyloxy)-29H,31H- phthalocyanine (CuPcOC8) molecules can self-organize on highly oriented pyrolytic graphite and form both quartic symmetry structures with relatively low molecular packing density and hexagonal symmetry structures with high packing density. However, the mechanism of the formation of the two types of molecular adlayers, and the tunability of this metal phthalocyanine film in ambient atmosphere has not been discussed. In this work, by increasing the temperature during the self-assembly process, or applying an annealing treatment to the self-assembled film, the transition of the self-assembled structure from quartic to hexagonal symmetry was observed. With images obtained with scanning tunnelling microscopy under different conditions and statistical analysis of the ratios of the quartic to hexagonal domain areas, this work revealed the existence of an energy barrier between the quartic and the hexagonal structures. The hexagonal phase corresponds to a thermodynamically stable state while the quartic phase is kinetically favorable but thermodynamically metastable. It was also found that with high enough temperature and given enough time, uniform ordered assembly motifs of CuPcOC8 molecules on a large scale can be obtained.
DOI10.1039/c3ra46651e
Indexed BySCI
WOS IDWOS:000336079200026
Citation statistics
Cited Times:9[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.xjipc.cas.cn/handle/365002/3827
Collection环境科学与技术研究室
Corresponding AuthorGan, W.
AffiliationChinese Acad Sci, Key Lab Funct Mat & Devices Special Environm, Xinjiang Tech Inst Phys & Chem, Lab Environm Sci & Technol, Urumqi 830011, Peoples R China; Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Wang, Yamin,Xu, Hongbo,Wang, Huanhuan,et al. Temperature dependent 2D self-assembled motif transition of copper-phthalocyanine derivates at air/HOPG interface: An STM study[J]. RSC Advances,2014,4(39):20256-20261.
APA Wang, Yamin.,Xu, Hongbo.,Wang, Huanhuan.,Li, Shouzhu.,Gan, Wei.,...&Gan, W..(2014).Temperature dependent 2D self-assembled motif transition of copper-phthalocyanine derivates at air/HOPG interface: An STM study.RSC Advances,4(39),20256-20261.
MLA Wang, Yamin,et al."Temperature dependent 2D self-assembled motif transition of copper-phthalocyanine derivates at air/HOPG interface: An STM study".RSC Advances 4.39(2014):20256-20261.
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