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- W2273121504 abstract "We derive an analytical pair potential of mean force for Brownian molecules in the liquid state. Our approach accounts for many-particle correlations of crowding particles of the liquid and for diffusive transport across the spatially modulated local density of crowders in the dense environment. Focusing on the limit of equal-size particles, we show that this diffusive transport leads to additional density- and structure-dependent terms in the interaction potential and to a much stronger attraction (by a factor of $ensuremath{approx}4$ at average volume fraction of crowders ${ensuremath{varphi}}_{0}=0.25$) than in the standard depletion interaction where the diffusive effects are neglected. As an illustration of the theory, we use it to study the size of a polymer chain in a solution of inert crowders. Even in the case of an athermal background solvent, when a classical chain should be fully swollen, we find a sharp coil-globule transition of the ideal chain collapsing at a critical value of the crowder volume fraction ${ensuremath{varphi}}_{c}ensuremath{approx}0.145$." @default.
- W2273121504 created "2016-06-24" @default.
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- W2273121504 date "2012-06-15" @default.
- W2273121504 modified "2023-10-17" @default.
- W2273121504 title "Theory of molecular crowding in Brownian hard-sphere liquids" @default.
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- W2273121504 doi "https://doi.org/10.1103/physreve.85.061202" @default.
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