MersV1, PubMed, Corpus, bibRecord, 002212

Statistical mechanics of DNA-mediated colloidal aggregation.

Identifieur interne : 002212 ( PubMed/Corpus ); précédent : 002211; suivant : 002213

Statistical mechanics of DNA-mediated colloidal aggregation.

Auteurs : Nicholas A. Licata ; Alexei V. Tkachenko

Source :

Physical review. E, Statistical, nonlinear, and soft matter physics [ 1539-3755 ] ; 2006.

RBID : pubmed:17155058

English descriptors

KwdEn :
- Colloids (chemistry), Computer Simulation, Crystallization (methods), DNA (chemistry), DNA (ultrastructure), Mechanics, Models, Chemical, Models, Molecular, Models, Statistical, Nanostructures (chemistry), Nanostructures (ultrastructure), Nucleic Acid Conformation, Quantum Theory.
MESH :
- chemical , chemistry : Colloids, DNA.
- chemistry : Nanostructures.
- methods : Crystallization.
- chemical , ultrastructure : DNA, Nanostructures.
- Computer Simulation, Mechanics, Models, Chemical, Models, Molecular, Models, Statistical, Nucleic Acid Conformation, Quantum Theory.

Abstract

We present a statistical mechanical model of aggregation in colloidal systems with DNA-mediated interactions. We obtain a general result for the two-particle binding energy in terms of the hybridization free energy DeltaG of DNA and two model-dependent properties: the average number of available DNA bridges and the effective DNA concentration c(eff). We calculate these parameters for a particular DNA bridging scheme. The fraction of all the n-mers, including the infinite aggregate, are shown to be universal functions of a single parameter directly related to the two-particle binding energy. We explicitly take into account the partial ergodicity of the problem resulting from the slow DNA binding-unbinding dynamics, and introduce the concept of angular localization of DNA linkers. In this way, we obtain a direct link between DNA thermodynamics and the global aggregation and melting properties in DNA-colloidal systems. The results of the theory are shown to be in quantitative agreement with two recent experiments with particles of micron and nanometer size.

DOI: 10.1103/PhysRevE.74.041408
PubMed: 17155058

Links to Exploration step

pubmed:17155058

Le document en format XML

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<author><name sortKey="Licata, Nicholas A" sort="Licata, Nicholas A" uniqKey="Licata N" first="Nicholas A" last="Licata">Nicholas A. Licata</name>
<affiliation><nlm:affiliation>Department of Physics and Michigan Center for Theoretical Physics, University of Michigan, 450 Church Street, Ann Arbor, Michigan 48109, USA.</nlm:affiliation>
</affiliation>
</author>
<author><name sortKey="Tkachenko, Alexei V" sort="Tkachenko, Alexei V" uniqKey="Tkachenko A" first="Alexei V" last="Tkachenko">Alexei V. Tkachenko</name>
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<author><name sortKey="Tkachenko, Alexei V" sort="Tkachenko, Alexei V" uniqKey="Tkachenko A" first="Alexei V" last="Tkachenko">Alexei V. Tkachenko</name>
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<term>DNA (ultrastructure)</term>
<term>Mechanics</term>
<term>Models, Chemical</term>
<term>Models, Molecular</term>
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<term>Mechanics</term>
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<front><div type="abstract" xml:lang="en">We present a statistical mechanical model of aggregation in colloidal systems with DNA-mediated interactions. We obtain a general result for the two-particle binding energy in terms of the hybridization free energy DeltaG of DNA and two model-dependent properties: the average number of available DNA bridges  and the effective DNA concentration c(eff). We calculate these parameters for a particular DNA bridging scheme. The fraction of all the n-mers, including the infinite aggregate, are shown to be universal functions of a single parameter directly related to the two-particle binding energy. We explicitly take into account the partial ergodicity of the problem resulting from the slow DNA binding-unbinding dynamics, and introduce the concept of angular localization of DNA linkers. In this way, we obtain a direct link between DNA thermodynamics and the global aggregation and melting properties in DNA-colloidal systems. The results of the theory are shown to be in quantitative agreement with two recent experiments with particles of micron and nanometer size.</div>
</front>
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<DateCompleted><Year>2007</Year>
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<DateRevised><Year>2006</Year>
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<Article PubModel="Print-Electronic"><Journal><ISSN IssnType="Print">1539-3755</ISSN>
<JournalIssue CitedMedium="Print"><Volume>74</Volume>
<Issue>4 Pt 1</Issue>
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<Title>Physical review. E, Statistical, nonlinear, and soft matter physics</Title>
<ISOAbbreviation>Phys Rev E Stat Nonlin Soft Matter Phys</ISOAbbreviation>
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<ArticleTitle>Statistical mechanics of DNA-mediated colloidal aggregation.</ArticleTitle>
<Pagination><MedlinePgn>041408</MedlinePgn>
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<Abstract><AbstractText>We present a statistical mechanical model of aggregation in colloidal systems with DNA-mediated interactions. We obtain a general result for the two-particle binding energy in terms of the hybridization free energy DeltaG of DNA and two model-dependent properties: the average number of available DNA bridges  and the effective DNA concentration c(eff). We calculate these parameters for a particular DNA bridging scheme. The fraction of all the n-mers, including the infinite aggregate, are shown to be universal functions of a single parameter directly related to the two-particle binding energy. We explicitly take into account the partial ergodicity of the problem resulting from the slow DNA binding-unbinding dynamics, and introduce the concept of angular localization of DNA linkers. In this way, we obtain a direct link between DNA thermodynamics and the global aggregation and melting properties in DNA-colloidal systems. The results of the theory are shown to be in quantitative agreement with two recent experiments with particles of micron and nanometer size.</AbstractText>
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<AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Licata</LastName>
<ForeName>Nicholas A</ForeName>
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<AffiliationInfo><Affiliation>Department of Physics and Michigan Center for Theoretical Physics, University of Michigan, 450 Church Street, Ann Arbor, Michigan 48109, USA.</Affiliation>
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Statistical mechanics of DNA-mediated colloidal aggregation.

Statistical mechanics of DNA-mediated colloidal aggregation.

Source :

English descriptors

Abstract

Links to Exploration step

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

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