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  First-passage statistics of colloids on fractals: Theory and experimental realization

Zunke, C., Bewerunge, J., Platten, F., Egelhaaf, S. U., & Godec, A. (2022). First-passage statistics of colloids on fractals: Theory and experimental realization. Science Advances, 8(3): eabk0627. doi:10.1126/sciadv.abk0627.

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Zunke, C., Author
Bewerunge, J., Author
Platten, F., Author
Egelhaaf , S. U., Author
Godec, A.1, Author           
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1Research Group of Mathematical Biophysics, Max Planck Institute for Multidisciplinary Sciences, Max Planck Society, ou_3350133              

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 Abstract: In nature and technology, particle dynamics frequently occur in complex environments, for example in restricted geometries or crowded media. These dynamics have often been modeled invoking a fractal structure of the medium although the fractal structure was only indirectly inferred through the dynamics. Moreover, systematic studies have not yet been performed. Here, colloidal particles moving in a laser speckle pattern are used as a model system. In this case, the experimental observations can be reliably traced to the fractal structure of the underlying medium with an adjustable fractal dimension. First-passage time statistics reveal that the particles explore the speckle in a self-similar, fractal manner at least over four decades in time and on length scales up to 20 times the particle radius. The requirements for fractal diffusion to be applicable are laid out, and methods to extract the fractal dimension are established.

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Language(s): eng - English
 Dates: 2022-01-21
 Publication Status: Published online
 Pages: 8
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 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1126/sciadv.abk0627
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Project name : We acknowledge financial support from the German Research Foundation (DFG) through the Emmy Noether Programme GO 2762/1-1 (to A.G.) and grant EG269/6-1 (to S.U.E.).
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Title: Science Advances
Source Genre: Journal
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Pages: 8 Volume / Issue: 8 (3) Sequence Number: eabk0627 Start / End Page: - Identifier: -