| 학회 |
한국고분자학회 |
| 학술대회 |
2002년 가을 (10/11 ~ 10/12, 군산대학교) |
| 권호 |
27권 2호, p.356 |
| 발표분야 |
특별 심포지엄 |
| 제목 |
Site-controlled SiO2 Nanodot Arrays and Their Surface Functionalization via Block Copolymer Thin Films |
| 초록 |
High density arrays of SiO2 nanodots were fabricated on thin films of asymmetric poly(styrene)-poly(ethylene oxide) diblock copolymer (PS-b-PEO) by vapor phase reaction of silicon tetrachloride (SiCl4). The cylindrical PEO microdomains of the asymmetric block copolymer were oriented normal to the surface by one-step spin coating of the polymer solution on solid substrates. SiO2 can be grown selectively onto PEO microdomain by swelling PS-b-PEO film with water followed by hydrolysis of SiCl4 at reduced pressure. Thus a nanoscopically patterned surface, comprised of an array of hexagonally packed SiO2 dots, was easily generated using PS-b-PEO thin film as a template. The SiO2 dots show sub-5 nm high, 23 nm diameter disks with hemispherical caps with an average separation distance of 40 nm when a PS-b-PEO of molecular weight ~ 25,300 g/mol was used. The surfaces of SiO2 were further modified with organochlorosilane compounds to produce self-assembled monolayers with various types of end-functional groups. In conclusion, the fabrication of SiO2 nanodots and subsequent utilization from thin films of PS-b-PEO point to a viable route by which site-specific functional nanostructures can be obtained in a simple, rapid manner.
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| 저자 |
김기홍1, 김동하*2, 김승현, Tomas P. Russell*, 조원호
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| 소속 |
1서울대, 2*Univ. of Massachusetts |
| 키워드 |
H |
| E-Mail |
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