| 학회 |
한국고분자학회 |
| 학술대회 |
2015년 가을 (10/06 ~ 10/08, 대구컨벤션센터(EXCO)) |
| 권호 |
40권 2호 |
| 발표분야 |
기능성 고분자 |
| 제목 |
Omniphobic Overhanging Microdisk Arrays Fabricated by Reaction-Diffusion-Based Photolithgraphy |
| 초록 |
In nature, some creatures have omniphobic surface which shows a contact angle larger than 90° for various liquids. For example, Springtails possess an array of re-entrant posts on their skin which facilitates the pinning of liquid-air interface. Inspired by Springtails, we create overhanging microdisk arrays for omniphobic surface by employing reaction-diffusion-based photolithography. Under local ultraviolet (UV) irradiation, oxygen rapidly consumes radicals created by UV-activation. When oxygen diffusion rate is comparable with consumption rate, the structure grows along a lateral direction from center at which oxygen becomes depleted early. We use this reaction-diffusion-based lithography to make narrow pillar on microdisk which are prepared in advance. The structures are turned over to have overhanging microdisk array, which exhibits robust omniphobic property after surface fluorination. This is because both top and bottom edge of microdisks can pin liquid-air interfaces. |
| 저자 |
김신현1, 심태섭2, 김주현1
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| 소속 |
1KAIST, 2Univ. of Pennsylvania |
| 키워드 |
photolithography; oxygen inhibition; omniphobic
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| E-Mail |
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