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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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41 Seminar 안내-Mamadou S. Diallo, Ph.D., 09.6.3 2009.05.25
40 Seminar 안내-H. Grabert (FRIAS) & J. G. Korvink (FRIAS & IMTEK), 09.5.25 2009.05.18
39 Seminar 안내 - 전석우박사, Intellecture Ventures 2008.01.21
38 Prof. Timothy P. Lodge, University of Minnesota file 2017.06.26
37 Prof. Nicholas A. Kotov (University of Michigan) file 2016.11.07
36 Prof. Nicholas A. Kotov (University of Michigan) file 2017.06.22
35 Prof. Nanshu Lu (University of Texas at Austin) file 2019.03.12
34 Prof. Mark Hersam, Northwestern 2014.08.12
33 Prof. Jongseung Yoon (University of Southern California) file 2017.06.22
32 Prof. Jianxin Geng, Beijing University of Chemical Technology file 2018.10.01
31 Prof. Gadi Eisenstein (Director Russell Berrie Nanotechnology Institute) file 2016.11.07
30 Prof. Andrey L. Rogach / Dr. Stephen V. Kershaw (City University of Hong Kong) file 2016.11.07
29 Lerwen LIU, PhD (Managing Director of NanoGlobe Pte Ltd) file 2016.11.07
28 KI정기세미나 안내-조용훈,전석우,김범준교수 (08.11.11, 16:00~) file 2008.11.07
27 KINC 그래핀 워크샵 (10월 1일(금) 13:00) file 2010.09.14
26 KINC Seminar: 이창구 박사 (Sungkyunkan Univ., Mechanical Eng.) file 2010.10.07
25 KINC Seminar: 유영준 박사 (Department of Physics, Columbia University, New York) file 2010.07.26
24 KINC Seminar: Prof. Younan Xia (Washington Univ. at St. Louis) 2009.11.26
23 KINC Seminar: Prof. Sunmin Ryu (Kyung Hee Univ.) file 2010.06.08
» KINC Seminar: Prof. Ryan C. Hayward (Univ. of Massachusetts, Amherst) 2010.05.17
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