Study of Active Brownian Particle Diffusion in Polymer Solutions

• DOI: 10.48550/arxiv.1801.03279
• Publication Date: 2018-01-01
• Authors: Yunfei Du; Zhonghuai Hou
• Keywords: Brownian dynamics; Langevin dynamics; Particle (ecology)

The diffusion behavior of an active Brownian particle (ABP) in polymer solutions is studied using Langevin dynamics simulations. We find that the long time coefficient $D$ can show a non-monotonic dependence on size $R$ if force $F_{a}$ large enough, wherein bigger would diffuse faster than smaller one which quite counterintuitive. By analyzing short comparison to passive one, we such non-trivial results from competition between persistence motion ABP and length-scale dependent effective viscosity experienced solution. \textcolor{black}{We have also introduced $\eta_{\text{eff}}$ by phenomenologically. Such found be larger strongly depends $F_{a}$}\textcolor{magenta}{.} In addition, propelling presents well scaling form at fixed factor changes non-monotonically with $R$. demonstrate issue plays rather subtle roles nano-particle complex solutions.