1 . T itle : Capillary force lithography for biomimetics and biochips

1. SEMINAR 1. Title : Capillary force lithography for biomimetics and biochips 2. Speaker : Professor Kahp-Yang Suh (Seoul National University) 3. Time : 16:00 – 17:30, Tuesday, October 31, 2006 4. Place : e+ Lecture Hall (room 83188), 2nd Research Building, Sungkyunkwan University 5. Summary : Capillary force lithography is a new patterning method for fabricating polymeric micro/nanostructures. After a thin polymer film is spin-coated on a solid substrate, a soft or rigiflex mold is brought in contact with the polymer surface, forming a spontaneous, reversible seal. When the temperature is increased above the polymer’s glass transition temperature, the polymer melt fills into the cavity of the mold by capillary action, thereby creating polymer structures after mold removal. Various micro/nanostructures can be fabricated using vaoius materials in a simple, economic fashion. In this seminar, an emphasis will be given on the applications of capillary force lithography towards fabrication of nature-inspired functional surfaces (a branch of biomimetics) and biochips for enabling protein and cell patterning. For biomimetics, two functional surfaces will be introduced: water repelling lotus surface and highly adhesive gecko foot. The surface of a lotus leaf was successfully fabricated using capillary force lithography in a top-down approach. Also the nanohair structure of gecko foot was fabricated using a nanodrawing process. Some functional aspects will be shown along with future directions and perspectives. Finally, several microfluidic devices will be presented for capturing proteins or cells inside a microfluidic channel. These devices would provide an optimized, engineering platform for biodiagnostic and bioanalytical devices and studying biological species. 6 Background : Education 1996 Chemical Engineering, Seoul National University, B.S 1998 Chemical Engineering, Seoul National University, M.S 2002 Chemical Engineering, Seoul National University, Ph.D Work Experience 2002.3-2002.8 BK21 postdoctoral associate, Chemical Engineering, Seoul National University 2002.9-2004.1 Postdoctoral associate in Langer Laboratory, Chemical Engineering, Massachusetts Institute of Technology 2004.2- Assistant Professor, School of Mechanical and Aerospace Engineering, Seoul National University Sungkyunkwan University