| 학회 |
한국고분자학회 |
| 학술대회 |
2005년 가을 (10/13 ~ 10/14, 제주 ICC) |
| 권호 |
30권 2호 |
| 발표분야 |
기능성 고분자 |
| 제목 |
Long-range ordering of block copolymer microdomains induced by thermal gradient fields |
| 초록 |
Selective area temperature gradient fields which have been widely used to purify and fabricate single crystal of semiconductor materials induce global alignment of block copolymer microdomains. We have employed various temperature gradients to control the orientation of a polystyrene-block-poly(methylmethacrylate) (PS-b-PMMA) and a polystyrene-block-poly(ethylene oxide) copolymer where PMMA and PEO form cylindrical microdomains respectively. The temperature gradient apparatus used consists of a heated wire and a micron scale moving stage on which thin block copolymer films are located. Circulating air in the device chamber generates temperature gradient field from the source heated wire. The wire is heated by its resistance and its temperature is controlled by voltage applied. A thin block copolymer film is moved by micron scale moving stage with the speed of 2 ~ 14 mm/day. We have observed a global orientation of the cylindrical PMMA microdomains aligned with their cylinder axis parallel to the temperature gradient over large area (~ 1 x 1 cm2). We have examined the effect of heater’s temperature, temperature gradient, film thickness, and sample moving speed on the orientation of the microdomains. Atomic Force Microscope, Transmission Electron Microscope and Optical Microscope are used for characterization of the nanostructures. |
| 저자 |
김태희1, 정희준1, 황원석1, 홍재민2, 허준3, 박철민1
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| 소속 |
1연세대, 2kist, 3서울대 |
| 키워드 |
block copolymer; temperature gradient; orientation
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| E-Mail |
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