Diffusion in active or living matters : at the intersection of statistical physics and biophysics
Date : October 26, 2022 16:00 ~
Speaker : 전재형 (포항공과대학교 물리학과)
Professor : Prof. Dohun Kim, Prof. Sunghoon Jung
Location : 56동105호 +온라인 중계 (코로나 방역 상황에 따라 변동 가능)
The rapid development of imaging and single-particle tracking (SPT) techniques has significantly elevated the understanding of single-molecule dynamics in living and soft-matter complex systems. Without a priori assumption on the underlying dynamics, the SPT tools make it possible to access the information on diffusion and/or conformational dynamics of individual molecules and, further, to obtain physical observables at a single-molecule level without ensemble-averaging. In terms of physics, the intracellular environment is understood as viscoelastic and active matter, often leading to the so-called “strange kinetics.” Currently, anomalous diffusion and active matter are rapidly growing fields at the intersection of biophysics and statistical physics. In this talk, I introduce this field to a general audience with an emphasis
on stochasticity in single-particle motion. It turns out that the information on the stochastic properties of the movement is a fingerprint of identifying the physical origins of the anomalous diffusion as well as the clue for establishing the corresponding dynamic model. Beyond these studies, I also introduce the transport dynamics in active media. Here, I focus on the non-equilibrium dynamics of active particles under viscoelastic feedback. Related research activities currently undertaken in my group are introduced.