NCTS Complex Systems seminar
Collective dynamics of diffusiophoretic motors moving on a filament track
Speaker
黃慕傑博士 Dr. Mu-Jie Huang
Department of Chemistry, University of Toronto, Canada
Time 12/21 Monday 11am
Place S4-208I, CMTP數學與理論物理中心
Abstract:
Biological motors, such as kinesins and myosins, convert chemical energy into conformational changes in order to carry out directed transport functions along filament tracks. Synthetic motors that utilize phoretic mechanisms for their propulsion can follow chemical gradients but are subject to strong orientational Brownian motion that turns their ballistic motion into enhanced diffusion. By using filaments in a fashion analogous to that of biological motors, not only orientational Brownian motion can be strongly suppressed, but also motor motion can be targeted to specific locations. In this talk, collective dynamics of chemically-powered diffusiophoretic motors attached to a filament will be presented. When many motors are attached to the filament structural and dynamical correlations that may extend over long distances arise. In addition, as the number of motors exceeds the critical value the motors switch their moving direction from forward to backward. Such collective behaviors are found to be coupling through chemical concentration fields.