| 학회 | 한국화학공학회 |
| 학술대회 | 2009년 봄 (04/23 ~ 04/24, 광주 김대중컨벤션센터) |
| 권호 | 15권 1호, p.1186 |
| 발표분야 | 나노공정 및 나노소자기술(이홍희 교수 은퇴기념) |
| 제목 | Inkless Micro-Contact Printing (IμCP) |
| 초록 | Polydimethylsiloxane (PDMS) has been the material of choice for various soft lithographic processes, and has also been investigated as an insulation material in outdoor high voltage application. In micro-contact printing (μCP), which is one of soft lithographic methods, it’s now well documented in the literatures that “contaminant” PDMS molecules is left on substrate, as well as ‘ink’ molecules. Contaminant PDMS residue after μCP has been believed to be due to the migration/out-diffusion of “small, uncured PDMS oligomers” in literatures. In this work, we carried out gel-permeation chromatography (GPC) analysis on the recovered PDMS material. We found that, contrary to common belief, the recovered PDMS material is NOT small molecules, compared to starting oligomeric PDMS. Rather, they have ~10 times higher molecular weight than the pristine oligomers. In addition to this new finding, we also suggest a novel surface patterning method, termed inkless micro-contact printing (IμCP), by exploiting the hydrophobic recovery phenomenon of PDMS stamp. In the IμCP, patterned PDMS stamp is simply made contact with substrate, leaving the recovered PDMS material as an ‘ink’ pattern on substrate. Finally, possible applications of IμCP will be discussed. |
| 저자 | 강달영1, 이홍희2 |
| 소속 | 1연세대, 2서울대 |
| 키워드 | PDMS; contact printing; hydrophobic recovery |
| 원문파일 | 초록 보기 |
