| 학회 |
한국고분자학회 |
| 학술대회 |
2004년 봄 (04/09 ~ 04/10, 고려대학교) |
| 권호 |
29권 1호, p.90 |
| 발표분야 |
복합재료 |
| 제목 |
Pressure-Mediated One-Dimensional Self-Assembly in Regioregular Polythiophenes: Controlling the Aspect Ratio of Nanowires |
| 초록 |
One-dimensional nanostructures, such as nanowires, represent the smallest dimension for efficient transport of electrons and thus are ideal building blocks for self- assembly of functional nanoscale devices. Structure and morphology of solvent vapor pressure-mediated one-dimensional self-assembly of regioregular poly (3-hexylthiophene), P3HT chains has been investigated by means of atomic force microscopy and grazing-incidence angle X-ray diffraction, GI-XRD. Nanowires with high aspect ratio (W (width) / L (length)), from several nanometers to several micrometers in length was obtained and length and aspect ratio of nanocrystals can be easily controlled by changing the vapor pressure (0 ~ 8.2 psig) of the solvent in solidification. Also, we found that the P3HT chains in nanowire are well oriented perpendicular to the insulator substrate from GI-XRD results. Therefore, we can speculate the formation of nanowires takes place by one-dimensional self-assembly governed by pi-pi stacking of the regioregular P3HT units and the length of the nanowires indicates that such pi-stacking can extend over several micrometers. We propose here nanowires as mesophase architectures, which could be used to interconnect gold nanoelectrodes in a molecular-scale field-effect transistor (FET). |
| 저자 |
Dohwan Kim1, Yunseok Jang2, Yeongdon Park3, Kilwon Cho1, Soojin Park2, Kyuhyun Im3, Taihyun Chang1
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| 소속 |
1Pohang Univ. of Science and Technology, 2Department of Chemical Engineering, 3Polymer Research Institute |
| 키워드 |
pressure-mediated; nanowires; high aspect ratio
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| E-Mail |
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