Nishizawa Kenji, Honda Natsuki, Inokuchi Shono, Ebata Hiroyuki, Ariga Takayuki, Mizuno Daisuke
Department of Physics, The University of Tokyo, Tokyo 113-8654, Japan.
Department of Physics, Kyushu University, Fukuoka 819-0395, Japan.
Phys Rev E. 2023 Sep;108(3-1):034601. doi: 10.1103/PhysRevE.108.034601.
We investigate the fluctuating dynamics of colloidal particles in weakly crosslinked F-actin networks with optical-trap-based microrheology. Using the dual-feedback technology, embedded colloidal particles were stably forced beyond the linear regime in a manner that does not suppress spontaneous fluctuations of particles. Upon forcing, a particle that was stably confined in a cage made of the network's crosslinks started to intermittently jump to the next caging microenvironments. By investigating the statistics of the jump dynamics, we discuss how heterogeneous relaxations observed in equilibrium systems became homogeneous when similar jumps were activated under constant forcing beyond the linear regime.
我们利用基于光镊的微流变学研究了弱交联F-肌动蛋白网络中胶体颗粒的涨落动力学。使用双反馈技术，以不抑制颗粒自发涨落的方式，将嵌入的胶体颗粒稳定地驱动到线性区域之外。施加外力后，一个稳定地限制在由网络交联形成的笼子中的颗粒开始间歇性地跳到下一个笼状微环境中。通过研究跳跃动力学的统计数据，我们讨论了在平衡系统中观察到的非均匀弛豫在超出线性区域的恒定外力作用下激活类似跳跃时如何变得均匀。
