Shin-Hyun Kim is an EWon associate professor of chemical and biomolecular engineering, KAIST. He received his B.S. degree in chemical engineering from Yonsei University, Korea, in 2004 and a Ph.D. degree in chemical and biomolecular engineering from KAIST, Korea, in 2009 under the supervision of the late Professor Seung-Man Yang. Following this, he worked as a postdoctoral researcher in Weitz’s group at Harvard University. His major research interests include droplet-based microfluidics, colloidal photonic structures, and capillarity phenomena.
His article “Bicolored Janus Microparticles Created by Phase Separation in Emulsion Drops” in Macromolecular Chemistry and Physics has been selected for this year’s Best of Macros.
Ask the Author
What is your scientific background? Chemical engineering.
What fields did you study? Colloidal science.
What is the most significant result of this study? We create two distinct, equally exposed compartments in spherical particles through phase separation of polymers dissolved in single-emulsion drops.
Did serendipity play a part in this work? We have studied phase separation of polymers in emulsion drops. However, most material sets yield either non-spherical shapes with equal exposure of two faces, or spherical shapes with unequal exposure; both are not appropriate for active color pigments. Accidently, we tried one set of materials and found that the set yields spherical shapes with equal exposure. Based on the experiment, we further expanded our work to develop active color pigments.
My favourite piece of research is… the development of pigment-free multicolor patterns using creep behavior of polymeric inverse opals (Lee et al. Adv. Funct. Mater. 2016, 26, 4587).
My biggest motivation is… to educate my students. I love all students in my group and hope they get a job they want. Through research, students learn what they need for their future careers.
N. G. Min, T. M. Choi, S.-H. Kim*
Macromol. Chem. Phys. 2017, 218, 1600265