ICCAS OpenIR
Vacuum-deposited submonolayer thin films of a three-ring bent-core compound
Tang, YH; Wang, Y; Wang, G; Wang, HB; Wang, LX; Yan, DH
2004-08-26
Source PublicationJOURNAL OF PHYSICAL CHEMISTRY B
ISSN1520-6106
Volume108Issue:34Pages:12921-12926
AbstractSubmonolayer thin films of a three-ring bent-core (that is, banana-shaped) compound, m-bis(4-n-octyloxystyryl)benzene (m-OSB), were prepared by the vacuum-deposition method, and their morphologies, structures, and phase behavior were investigated by atomic force microscopy (AFM) and transmission electron microscopy (TEM). The films have island shapes ranging from compact elliptic or circular patterns at low temperatures (below 40 degreesC) to branched patterns at high temperatures (above 60 degreesC). This shape evolution is contrary to the prediction based on the traditional diffusion-limited aggregation (DLA) theory. AFM observations revealed that two different mechanisms governed the film growth, in which the compact islands were formed via a dewetting-like behavior, while the branched islands diffusion-mediated. It is suggested m-OSB forms a two-dimensional, liquid crystal at the low-temperature substrate that is responsible for the unusual formation of compact islands. All of the monolayer islands are unstable and apt to transform to slender bilayer crystals at room temperature. This phase transition results from the peculiar molecular shape and packing of the bent-core molecules and is interpreted as escaping from macroscopic net polarization by the formation of an antiferroelectric alignment.
DOI10.1021/jp048607f
Indexed BySCI
Language英语
WOS IDWOS:000223430800045
PublisherAMER CHEMICAL SOC
Citation statistics
Cited Times:21[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/81928
Collection中国科学院化学研究所
Corresponding AuthorYan, DH
AffiliationChinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China
Recommended Citation
GB/T 7714
Tang, YH,Wang, Y,Wang, G,et al. Vacuum-deposited submonolayer thin films of a three-ring bent-core compound[J]. JOURNAL OF PHYSICAL CHEMISTRY B,2004,108(34):12921-12926.
APA Tang, YH,Wang, Y,Wang, G,Wang, HB,Wang, LX,&Yan, DH.(2004).Vacuum-deposited submonolayer thin films of a three-ring bent-core compound.JOURNAL OF PHYSICAL CHEMISTRY B,108(34),12921-12926.
MLA Tang, YH,et al."Vacuum-deposited submonolayer thin films of a three-ring bent-core compound".JOURNAL OF PHYSICAL CHEMISTRY B 108.34(2004):12921-12926.
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