论文标题
两个化学活性颗粒的确切的流动相互作用
Exact phoretic interaction of two chemically-active particles
论文作者
论文摘要
我们研究了两个各向同性化学活性颗粒的非平衡相互作用，这些颗粒考虑了确切的近场化学相互作用以及流体动力相互作用。我们在参数空间中确定区域，其中描述两个粒子的动力系统可以具有固定点----一个无法在远场近似下捕获的现象。我们发现，由于近场效应，颗粒可能在非零间隙大小的情况下达到稳定的平衡，或者使在足够强的噪声存在下可以解离的复合物。我们明确表明，近场作用起源于自我产生的化学梯度，类似于自我推测的笔迹粒子和平坦的底物的相互作用。
We study the nonequilibrium interaction of two isotropic chemically-active particles taking into account the exact near-field chemical interactions as well as hydrodynamic interactions. We identify regions in the parameter space wherein the dynamical system describing the two particles can have a fixed-point---a phenomenon that cannot be captured under the far-field approximation. We find that due to near-field effects, the particles may reach a stable equilibrium at a nonzero gap size, or make a complex that can dissociate in the presence of sufficiently strong noise. We explicitly show that the near-field effects are originated from a self-generated neighbor-reflected chemical gradient, similar to interactions of a self-propelling phoretic particle and a flat substrate.
