Levich Institute Seminar Announcement, 05/17/2016
Steinman Hall, Room #312
(Chemical Engineering Conference Room)
Dr. Jaehun Chun
Pacific Northwest National Laboratory (PNNL)
"Colloidal Interactions in Nanomaterials, Crystal Growth, and Beyond: Correlating Details at Small Scales to Larger Scale Phenomena "
Colloidal interactions, coupled with hydrodynamics in many cases, are critical to understand man-made processes in a wide range of engineering applications (e.g., food, printing ink, semi-conductor, and nuclear waste treatment), in addition to natural processes (e.g., fog and fate of pollutants in gaseous/aqueous phases). While the classical Derjaguin-Landau-Verwey-Overbeek (DLVO) theory has been a cornerstone of colloidal science, it suffers from “details” associated with chemical physics at small scales. In this talk, we will see how to understand larger scale phenomena better from a coupling to such details, based on examples – nanomaterials, crystal growth, and more. A talk will illustrate that connecting scales with maintaining consistency between frameworks would be necessary to study the effects of such details on colloidal interactions.
BRIEF ACADEMIC/EMPLOYMENT HISTORY
Jaehun Chun is a Senior Research Scientist at PNNL. He earned Ph.D. in Chemical Engineering from Cornell and performed postdoctoral research at Princeton and NIST. He also worked in Polymers Division at LG Chemical Research Center as a Research Scientist/Engineer.
RECENT RESEARCH INTERESTS
My research interests are on energetics and dynamics of structured fluids at nanometer length scales, especially focused on theoretical/computational frameworks to correlate these features to larger scale phenomena for energy and environmental applications. Of particular interest are self-assemblies of various nanoparticles, molecular forces, and physicochemical hydrodynamics. My previous and current work include dynamics of aerosols in rarefied gas flows under turbulence, electrostatics/electrodynamic forces on colloids, separation of nanoparticles, and rheology of colloidal slurries.