Rod-shaped particles embedded in certain matrices have been reported to exhibit an increase in their center of mass diffusivity upon increasing the matrix density. This increase has been considered to be caused by a kinetic constraint in analogy with tube models. We investigate a mobile rodlike particle in a sea of immobile point obstacles using a kinetic Monte Carlo scheme equipped with a Markovian process, that generates gaslike collision statistics, so that such kinetic constraints do essentially not exist. Even in such a system, provided the particle's aspect ratio exceeds a threshold value of about 24, the unusual increase in the rod diffusivity emerges. This result implies that the kinetic constraint is not a necessary condition for the increase in the diffusivity.
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http://dx.doi.org/10.1103/PhysRevE.107.044604 | DOI Listing |
J Environ Manage
January 2025
School of Business, Xi'an University of Finance and Economics, Xi'an, 710100, China.
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View Article and Find Full Text PDFMaterials (Basel)
January 2025
Department of Metal Forming, Welding and Metrology, Wroclaw University of Science and Technology, Lukasiewicza Street 5, 50-370 Wroclaw, Poland.
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View Article and Find Full Text PDFSci Rep
January 2025
Department of Textile Engineering, Amirkabir University of Technology, Tehran, Iran.
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View Article and Find Full Text PDFInvest Ophthalmol Vis Sci
January 2025
Biology and Biochemistry PhD Programs, Graduate Center, City University of New York, New York, New York, United States.
Purpose: Retinal development in the mouse continues past birth and provides a widely used model system in which photoreceptor formation can be observed and manipulated. This experimental paradigm provides opportunities for both gain-of-function and loss-of-function studies, which can be accomplished through in vivo or ex vivo plasmid delivery and electroporation. However, the cis-regulatory elements used to implement this approach have not been fully evaluated or optimized for the unique transcriptional environment of photoreceptors.
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