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- W4307713585 abstract "We model the behavior of a single colloid embedded in a cross-linked polymer gel, immersed in a viscous background fluid. External fields actuate the particle into a periodic motion, which deforms the embedding matrix and creates a local microcavity, containing the particle and any free volume created by its motion. This cavity exists only as long as the particle is actuated and, when present, reduces the local density of the material, leading to swelling. We show that the model exhibits rich resonance features, but is overall characterized by clear scaling laws at low and high driving frequencies, and a pronounced resonance at intermediate frequencies. Our model predictions suggest that both the magnitude and position of the resonance can be varied by varying the material's elastic modulus or cross-linking density, whereas the local viscosity primarily has a dampening effect. Our work implies appreciable free-volume generation is possible by dispersing a collection of colloids in the medium, even at the level of a simple superposition approximation." @default.
- W4307713585 created "2022-11-05" @default.
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- W4307713585 date "2022-10-28" @default.
- W4307713585 modified "2023-09-24" @default.
- W4307713585 title "Controlled gel expansion through colloid oscillation" @default.
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- W4307713585 doi "https://doi.org/10.1103/physreve.106.044609" @default.
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- W4307713585 hasPublicationYear "2022" @default.
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