Colloids with key-lock interactions: Nonexponential relaxation, aging, and anomalous diffusion.

Colloids with key-lock interactions: Nonexponential relaxation, aging, and anomalous diffusion. Research Abstract Details 

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Colloids with key-lock interactions: Nonexponential relaxation, aging, and anomalous diffusion. Abstract Text:

Nicholas A Licata,Alexei V Tkachenko,Nicholas A Licata,Alexei V Tkachenko,Nicholas A Licata,Alexei V Tkachenko,

The dynamics of particles interacting by key-lock binding of attached biomolecules are studied theoretically. Experimental realizations of such systems include colloids grafted with complementary single-stranded DNA (ssDNA), and particles grafted with antibodies to cell-membrane proteins. Depending on the coverage of the functional groups, we predict two distinct regimes. In the low coverage localized regime, there is an exponential distribution of departure times. As the coverage is increased the system enters a diffusive regime resulting from the interplay of particle desorption and diffusion. This interplay leads to much longer bound state lifetimes, a phenomenon qualitatively similar to aging in glassy systems. The diffusion behavior is analogous to dispersive transport in disordered semiconductors: depending on the interaction parameters it may range from a finite renormalization of the diffusion coefficient to anomalous, subdiffusive behavior. We make connections to recent experiments and discuss the implications for future studies.

Colloids with key-lock interactions: Nonexponential relaxation, aging, and anomalous diffusion. Publishing Authors By Initials

NA Licata,AV Tkachenko,NA Licata,AV Tkachenko,NA Licata,AV Tkachenko,

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Colloids with key-lock interactions: Nonexponential relaxation, aging, and anomalous diffusion. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Physical review. E, Statistical, nonlinear, and so

VOLUME: 76

Page Numbers: 041405

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ISSN: 1539-3755

DAY: 25

MONTH: 10

YEAR: 2007

Colloids with key-lock interactions: Nonexponential relaxation, aging, and anomalous diffusion. Information

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LANGUAGE: eng

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Grant and Affiliation Information for Colloids with key-lock interactions: Nonexponential relaxation, aging, and anomalous diffusion.

AFFILIATION: Department of Physics and Michigan Center for Theoretical Physics, University of Michigan, 450 Church Street, Ann Arbor, Michigan 48109, USA.

Country: United States

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MEDLINETA: Phys Rev E Stat Nonlin Soft Ma

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