AFM observations of phase transitions in molecularly thin films of a three-ring bent-core compound
文献类型：期刊论文
| 作者 | Tang, YH; Wang, Y; Wang, XD; Xun, SD; Mei, CY; Wang, LX; Yan, DH |
| 刊名 | JOURNAL OF PHYSICAL CHEMISTRY B
 |
| 出版日期 | 2005-05-12 |
| 卷号 | 109期号:18页码:8813-8819 |
| ISSN号 | 1520-6106 |
| DOI | 10.1021/jp045427x |
| 英文摘要 | Submonolayer thin films of a three-ring bent-core (or banana-shaped) compound, m-bis(4-n-octyloxystyryl)benzene (m-OSB), were vacuum-deposited on a mica surface, and a spontaneous transition from monolayer films to bilayer crystals was observed at room temperature, which was ascribed to the specific molecular shape and polar layered packing of the bent-core molecules [Tang et al. J. Phys. Chem. B 2004, 108 (34), 12921-12926]. The crystal nucleation and growth from the monolayer films as well as the melting phase transition from the bilayer crystals were investigated using atomic force microscopy (AFM). It was shown that after initial nucleation, the crystal growth was achieved through three pathways: direct absorption of molecules from monolayer films, molecular cluster diffusion, and quasi-Ostwald ripening. When annealing the bilayer crystals at elevated temperatures, morphological change from a bilayer to a monolayer was observed, and some new islands with fingerlike patterns were formed during this process, which resulted from a diffusion-controlled growth of the molten molecules. In general, the high-resolution AFM in combination with the molecularly thin m-OSB films provided us with direct visualization of nucleation, crystal growth, melting, and film morphology evolution on the mesoscopic scale, which are of fundamental interest from the theoretical viewpoint and are of central importance for the control of interfacial properties in practical applications. |
| 语种 | 英语 |
| WOS记录号 | WOS:000228982900044 |
| 出版者 | AMER CHEMICAL SOC |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/56859]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Yan, DH |
| 作者单位 | Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China |
| 推荐引用方式 GB/T 7714 | Tang, YH,Wang, Y,Wang, XD,et al. AFM observations of phase transitions in molecularly thin films of a three-ring bent-core compound[J]. JOURNAL OF PHYSICAL CHEMISTRY B,2005,109(18):8813-8819. |
| APA | Tang, YH.,Wang, Y.,Wang, XD.,Xun, SD.,Mei, CY.,...&Yan, DH.(2005).AFM observations of phase transitions in molecularly thin films of a three-ring bent-core compound.JOURNAL OF PHYSICAL CHEMISTRY B,109(18),8813-8819. |
| MLA | Tang, YH,et al."AFM observations of phase transitions in molecularly thin films of a three-ring bent-core compound".JOURNAL OF PHYSICAL CHEMISTRY B 109.18(2005):8813-8819. |
入库方式： OAI收割
来源：化学研究所
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