[기계] Biomimetic Skins

<KIMM-SNU 협력 자연모사 Green Technology 연구기획단 세미나>

1. 제 목 : Biomimetic Skins

2. 연 사 : 문명운 박사 (한국과학기술연구원, KIST)

3. 일 시 : 2009년 10월 27일 (화요일) 오후 4시 30분 - 5시 30분

4. 장 소 : 서울대학교 301동 1512호 (15층)

5. 초 록 :
The skins covering the bodies of living creatures, such as animal hands, feet or snake’s body have been continuously developed for optimal design in shape and function for protecting its bodies from friction/wear or damages like wounds and tears. Various living creatures have been found to have the unique and optimal surface textures on their skins such as wrinkles on human hands or foot or dimples/dots on snake’s skins, which have been adjusted under various environments with temperature, weather and dry/wet conditions. In this talk, the systems with skin-substrate will be first overviewed and detailed in two types of skins; wrinkled skins and snake’s skins.
This talk first focuses the formation of the wrinkled skins, inspired by animal skins with wrinkle patterns in several different scales from nanometer to meter. Wrinkles can form on a hard film on a soft substrate with external/intrinsic load. It is demonstrated that ion beam irradiation with focused/broad ion beam system can induce and control the wrinkle patterns on a soft polymer like polydimethylsiloxane (PDMS). General introduction and basic formation mechanism of wrinkling are discussed as well as some recent findings and bio-mimetic applications for a biological assay and superhydrophobic surface.
The snake’s skins show the unique and well-defined multi-scale textures revealed by observation of inside and outside of its scales (Brazilian Boa). Nano-scale dimple patterns in several hundred nanometer scale are distributed, while asymmetric micro-scales steps are featured on the skin surfaces, which is believed to reduce the surface friction as well as wear during locomotion on a wet/dry ground. The surface textures are also found in different shapes with regard to location in the body. This optimal design for lowering friction can be harnessed for improving the tribological performance in lubricating environments in automobile parts.

6. 약 력 :
< Education >
1998, Seoul National University, B.S
2000, Seoul National University, M.S.
2004, Seoul National University, Ph.D
< Work Experience >
2005-2007, Postdoc, Harvard University

7. 문 의 : 기계항공공학부 김호영 교수 (☏ 02-880-9286)