American Institute of Physics;United States: American Institute of Physics
摘要:
摘要： The diffusivity and surface excess of nanoswimmers which are confined in two plates with the separation H are explored by dissipative particle dynamics. Both mean squared displacement and velocity autocorrelation function methods are used to study the diffusive behavior of nanoswimmers with the Brownian diffusivity D0 and the results obtained from both methods are consistent. The active diffusivity of confined nanoswimmers (D − D0) depends on the wall separation, swimming speed va, and run time τ. Our simulation results show that $(D-D_{0})/v_{a}^{2}\tau$ (D−D0)/va2τ is a function of vaτ/H. The reduction in the diffusivity of active colloids is more significant than that of passive particles. The distribution of nanoswimmers between two parallel walls is acquired and two regions can be identified. The accumulation of nanoswimmers near walls is quantitatively described by the surface excess Γ. It is found that Γ grows as the nanoswimmer concentration cb, swimming speed va, and run time τ are increased. The coupling between the ballistic trajectory of nanoswimmers and the walls results in nanoswimmer accumulation. The simulation outcomes indicate that Γ/Hcb is a function of H/vaτ. 其他題名： J Chem Phys 出版者： United States: American Institute of Physics 出版日期： 2014-11-14 出處： The Journal of chemical physics, 2014-11, Vol.141 (18), p.184902 資源來源： AIP Journals 版權： 2014 AIP Publishing LLC. 識別號： ISSN: 0021-9606 識別號： ISSN: 1089-7690 識別號： EISSN: 1089-7690 識別號： DOI: 10.1063/1.4901117 識別號： PMID: 25399157
