Diffusion of colloidal particles in model porous media

Luhui Ning; Peng Liu; Fangfu Ye; Mingcheng Yang; Ke Chen

doi:10.1103/PhysRevE.103.022608

Diffusion of colloidal particles in model porous media

Luhui Ning, Peng Liu, Fangfu Ye, Mingcheng Yang^*, Ke Chen^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

Abstract

Using video microscopy and simulations, we study the long-time diffusion of colloidal tracers in a wide range of model porous media composed of frozen colloidal matrices with different structures. We found that the diffusion coefficient of a tracer can be quantitatively determined by the structures of porous media. In particular, a universal scaling relation exists between the dimensionless diffusion coefficient of the tracer and the structural entropy of the system. This universal scaling relation is an extension of the scaling law previously discovered for the diffusion of colloidal particles in fluctuating media.

Original language	English
Article number	022608
Journal	Physical Review E
Volume	103
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevE.103.022608
Publication status	Published - Feb 2021
Externally published	Yes

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Ning, L., Liu, P., Ye, F., Yang, M., & Chen, K. (2021). Diffusion of colloidal particles in model porous media. Physical Review E, 103(2), Article 022608. https://doi.org/10.1103/PhysRevE.103.022608

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AB - Using video microscopy and simulations, we study the long-time diffusion of colloidal tracers in a wide range of model porous media composed of frozen colloidal matrices with different structures. We found that the diffusion coefficient of a tracer can be quantitatively determined by the structures of porous media. In particular, a universal scaling relation exists between the dimensionless diffusion coefficient of the tracer and the structural entropy of the system. This universal scaling relation is an extension of the scaling law previously discovered for the diffusion of colloidal particles in fluctuating media.

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Diffusion of colloidal particles in model porous media

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