| 학회 |
한국고분자학회 |
| 학술대회 |
2012년 가을 (10/11 ~ 10/12, 창원컨벤션센터) |
| 권호 |
37권 2호 |
| 발표분야 |
고분자구조 및 물성 |
| 제목 |
Unidirectionally aligned line patterns driven by entropic effects on faceted surfaces |
| 초록 |
A simple, versatile approach to the directed self-assembly of block copolymers (BCPs) into a macroscopic array of unidirectionally aligned cylindrical microdomains on reconstructed faceted single crystal surfaces or on flexible, inexpensive polymeric replicas was discovered. High fidelity transfer of the line pattern generated from the microdomains to a master mold is also shown. A single-grained line patterns over arbitrarily large surface areas without the use of top-down techniques is demonstrated, which has an order parameter typically in excess of 0.97 and a slope error of 1.1 deg. This degree of perfection has yet to be achieved by any other methods. The exceptional alignment arises from entropic penalties of chain packing in the facets coupled with the bending modulus of the cylindrical microdomains. This is shown, theoretically, to be the lowest energy state. It is also demonstrated that the direction of this line patterns can be controlled by the facet geometry. |
| 저자 |
홍성우1, 허준2, Xiaodan Gu3, 이동현4, 조원호5, 박수진6, Ting Xu7, Thomas P. Russell3
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| 소속 |
1삼성종합기술원, 2연세대, 3UMass Amherst, 4단국대, 5서울대, 6UNIST, 7UC Berkeley |
| 키워드 |
block copolymer; directed self-assembly; long-range order; pattern transfer
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| E-Mail |
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