한국진공학회:학술대회논문집 (Proceedings of the Korean Vacuum Society Conference)
- 한국진공학회 2011년도 제40회 동계학술대회 초록집
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- Pages.449-449
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- 2011
Surface energy assisted gecko-inspired dry adhesives
- Rahmawan, Yudi (Interdisciplinary Fusion Technology Division, Korea Institute of Science and Technology) ;
- Kim, Tae-Il (School of Mechanical and Aerospace Engineering, Seoul National University) ;
- Kim, Seong-Jin (Interdisciplinary Fusion Technology Division, Korea Institute of Science and Technology) ;
- Lee, Kwang-Ryeol (Interdisciplinary Fusion Technology Division, Korea Institute of Science and Technology) ;
- Moon, Myoung-Woon (Interdisciplinary Fusion Technology Division, Korea Institute of Science and Technology) ;
- Suh, Kahp-Yang (School of Mechanical and Aerospace Engineering, Seoul National University)
- 발행 : 2011.02.09
초록
We reported the direct effect of intrinsic surface energy of dry adhesive material to the Van der Waals and capillary forces contributions of the total adhesion force in an artificial gecko-inspired adhesion system. To mimic the gecko foot we fabricated tilted nanohairy structures using both lithography and ion beam treatment. The nanohairy structures were replicated from Si wafer mold using UV curable polymeric materials. The control of nanohairs slanting angles was based on the uniform linear argon ion irradiation to the nanohairy polymeric surface. The surface energy was studied utilizing subsequent conventional oxygen ion treatment on the nanohairy structures which resulted in gradient surface energy. Our shear adhesion test results were found in good agreement with the accepted Van der Waals and capillary forces theory in the gecko adhesion system. Surface energy would give a direct impact to the effective Hamaker constant in Van der Waals force and the filling angle (
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