| 학회 | 한국고분자학회 |
| 학술대회 | 2005년 가을 (10/13 ~ 10/14, 제주 ICC) |
| 권호 | 30권 2호 |
| 발표분야 | 자기조립형 기능성재료 |
| 제목 | DNA-like double helices formed by block copolymer caged in cylindrical nanopore |
| 초록 | We investigate the influence of the confinement on the mesophase formation of cylinder-forming diblock copolymer caged in a cylindrical pore in which the surface of the pore preferentially attracts minority block. Using cell dynamics simulation, we construct phase maps as a function of the surface interaction (h), the degree of incompatibility between two blocks, and the pore diameter (D) relative to the mesophase period at bulk (Lo). Depending on h and D/Lo, we observe a variety of confinement-induced mesophases ranging from a simple rod-like structure to more complicated structures involving various forms of helices or doughnuts. In particular, it is found that when D/Lo=3.0~3.5 a single helical structure formed by minority block transforms to a DNA-like double helices as the attraction between inner surface and the minority block becomes strong. We also find that the further increase in pore diameter gives rise to a sequential morphological variation from a rod-in-helix to a helix-in-helix, and eventually to a vertical alignment of many-rods. The structural analysis for each of these intriguing structures is theoretically discussed. Fig. 1 single and double helix formed by diblock copolymer in cylindrical nanopore |
| 저자 | 허 준1, 신규순1, 조원호1, Thomas P. Russell2 |
| 소속 | 1서울대, 2Univ. of Massachusetts |
| 키워드 | block copolymer; nanopore |
