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The role of particle shape in active depletion

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Title: The role of particle shape in active depletion
Authors: Harder, J., Mallory, S. A., Tung, C., Valeriani, C., Cacciuto, A.
Publication Year: 2014
Collection: Condensed Matter
Physics (Other)
Subject Terms: Condensed Matter - Soft Condensed Matter, Condensed Matter - Mesoscale and Nanoscale Physics, Condensed Matter - Materials Science, Physics - Chemical Physics
More Details: Using numerical simulations, we study how a solution of small active disks, acting as depletants, induces effective interactions on large passive colloids. Specifically, we analyze how the range, strength, and sign of these interactions are crucially dependent on the shape of the colloids. Our findings indicate that while colloidal rods experience a long-ranged predominantly attractive interaction, colloidal disks feel a purely repulsive force that is short-ranged in nature and grows in strength with the size ratio between the colloids and active depletants. For colloidal rods, simple scaling arguments are proposed to characterize the strength of these induced interactions.
Document Type: Working Paper
Access URL: http://arxiv.org/abs/1407.6743
Accession Number: edsarx.1407.6743
Database: arXiv
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  Data: The role of particle shape in active depletion
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  Data: <searchLink fieldCode="AR" term="%22Harder%2C+J%2E%22">Harder, J.</searchLink><br /><searchLink fieldCode="AR" term="%22Mallory%2C+S%2E+A%2E%22">Mallory, S. A.</searchLink><br /><searchLink fieldCode="AR" term="%22Tung%2C+C%2E%22">Tung, C.</searchLink><br /><searchLink fieldCode="AR" term="%22Valeriani%2C+C%2E%22">Valeriani, C.</searchLink><br /><searchLink fieldCode="AR" term="%22Cacciuto%2C+A%2E%22">Cacciuto, A.</searchLink>
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  Data: 2014
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  Data: Condensed Matter<br />Physics (Other)
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  Data: Using numerical simulations, we study how a solution of small active disks, acting as depletants, induces effective interactions on large passive colloids. Specifically, we analyze how the range, strength, and sign of these interactions are crucially dependent on the shape of the colloids. Our findings indicate that while colloidal rods experience a long-ranged predominantly attractive interaction, colloidal disks feel a purely repulsive force that is short-ranged in nature and grows in strength with the size ratio between the colloids and active depletants. For colloidal rods, simple scaling arguments are proposed to characterize the strength of these induced interactions.
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      – SubjectFull: Condensed Matter - Soft Condensed Matter
        Type: general
      – SubjectFull: Condensed Matter - Mesoscale and Nanoscale Physics
        Type: general
      – SubjectFull: Condensed Matter - Materials Science
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      – SubjectFull: Physics - Chemical Physics
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      – TitleFull: The role of particle shape in active depletion
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            NameFull: Harder, J.
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            NameFull: Mallory, S. A.
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            NameFull: Tung, C.
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            NameFull: Valeriani, C.
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            NameFull: Cacciuto, A.
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              Type: published
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