论文标题
由周围溶液中相关性引起的活性粒子的自我动力
Self-motility of an active particle induced by correlations in the surrounding solution
论文作者
论文摘要
流动转运的当前模型依赖于产生“扩散”粒子流体界面的分子力。从理论上讲，我们研究了一种替代机制，其中弥散界面仅是由于周围溶液的不变相关长度而出现的。这种机制可以驱动化学活性粒子的自我动力。数值估计表明，速度可以每秒达到微米。预测的现象学包括速度对活动的双线性依赖性以及在改变相关长度时可能的双速度逆转。
Current models of phoretic transport rely on molecular forces creating a "diffuse" particle-fluid interface. We investigate theoretically an alternative mechanism, in which a diffuse interface emerges solely due to a non-vanishing correlation length of the surrounding solution. This mechanism can drive self-motility of a chemically active particle. Numerical estimates indicate that the velocity can reach micrometers per second. The predicted phenomenology includes a bilinear dependence of the velocity on the activity and a possible double velocity reversal upon varying the correlation length.
