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◎ Title : Instabilities of polymers at interfaces: New routes to responsive surfaces and nanostructured assemblies
◎ Speaker: Prof. Ryan C. Hayward (University of Massachusetts, Amherst)
◎ Date & Time : 5. 25(화) 16:00 - 18:00
◎ Place : #1101(1st floor seminar room), W1-3 bd.
◎ Contact : 생명화학공학과 김범준 교수(TEL.3935)
◎ Abstract :

Instabilities of polymers at interfaces: New routes to responsive surfaces and nanostructured assemblies

Our group studies the use of different types of interfacial instabilities to generate complex and stimuli-responsive polymeric structures. In one example, we study an elastic creasing instability of surface-attached hydrogels under osmotic swelling stresses. Despite being discovered more than a century ago, our understanding of this process is far from complete. We are working to quantitatively characterize the conditions under which the instability occurs, the structures that are formed, and the implications for the design of biomaterials. In addition, this process provides a simple and flexible route to prepare "smart" surfaces with chemical patterns that can be reversibly "erased" and regenerated on demand. In another example, we study the self-organization of amphiphilic block copolymers in evaporating droplets of organic solvent. Through a series of hydrodynamic instabilities of the organic/water interface, the polymers assemble into a variety of micellar and complex microparticulate structures that offer unique opportunities as encapsulation and delivery vehicles. We have found that the instabilities are consistent with a nearly vanishing tension of the organic/water interface, and have characterized how the resulting structures depend upon the composition of the amphiphilic polymer.

List of Articles
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81 KI정기세미나 안내-조용훈,전석우,김범준교수 (08.11.11, 16:00~) file 2008.11.07
80 Seminar안내-김필립박사(Columbia Univ.), 08.12.10(수) 15시 2008.11.26
79 [KINC Seminar] 나노융합산업 발전전략- 박기영 박사 (지식경제부 바이오나노과장) 2009.02.26
78 Seminar안내-박지용 박사 (아주대), 09.04.2 2009.03.23
77 Seminar 안내-홍병희 박사(성균관대), 09.3.24 2009.03.23
76 Seminar 안내-Prof. Yuanbo Zhang (UC Berkeley), 09.3.31 2009.03.31
75 Seminar 안내-H. Grabert (FRIAS) & J. G. Korvink (FRIAS & IMTEK), 09.5.25 2009.05.18
74 Seminar 안내-Mamadou S. Diallo, Ph.D., 09.6.3 2009.05.25
73 Seminar 안내-Prof. Michiya Matsusaki, 09.6.16 2009.06.10
72 Seminar 안내-Prof. Raj Banerjee, 09.6.24 2009.06.15
71 KI Symposium: Prof. Matthew Tirrell (UC, Berkely) file 2009.08.11
70 KINC Seminar: Prof. Rod Ruoff (The Univ. of Texas at Austin) file 2009.08.12
69 KINC Seminar: Prof. Ralph G. Nuzzo (University of Illinois Urbana Champaign) 2009.09.22
68 KINC Seminar: Dr. Won Hyuk Suh (Univ. of California, Berkeley) 2009.10.23
67 KINC Seminar: Prof. Younan Xia (Washington Univ. at St. Louis) 2009.11.26
66 KINC Seminar: Prof. Je Deok Kim (NIMS) 2010.02.05
65 KINC Seminar: Dr. Seung Hyun Kang (KCC) 2010.03.29
64 KINC Seminar: Prof. Peter Nordlander (Rice Univ.) 2010.03.29
63 KINC Seminar: Dr. Tae Hoon Kim (Micron Technology) 2010.05.07
» KINC Seminar: Prof. Ryan C. Hayward (Univ. of Massachusetts, Amherst) 2010.05.17
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