http://www.cnr.it/ontology/cnr/individuo/prodotto/ID2145

Self-assembling DNA dendrimers: A numerical study (Articolo in rivista)

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Self-assembling DNA dendrimers: A numerical study (Articolo in rivista) (literal)

Anno

Alternative label

Largo, J; Starr, FW; Sciortino, F (2007)
Self-assembling DNA dendrimers: A numerical study
in Langmuir
(literal)

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Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy; Univ Roma La Sapienza, INFM CNR SOFT, I-00185 Rome, Italy; Wesleyan Univ, Dept Phys, Middletown, CT 06459 USA (literal)

Titolo

Abstract

DNA is increasingly used as a specific linker to template nanostructured materials. We present a molecular dynamics simulation study of a simple DNA-dendrimer model designed to capture the basic characteristics of the biological interactions, where selectivity and strong cooperativity play an important role. Exploring a large set of densities and temperatures, we follow the progressive formation of a percolating large-scale network whose connectivity can be described by random percolation theory. We identify the relative regions of network formation and kinetic arrest versus phase separation and show that the location of the two-phase region can be interpreted in the same framework as reduced valency models. This correspondence provides guidelines for designing stable, equilibrium self-assembled low-density networks. Finally, we demonstrate a relation between bonding and dynamics, by showing that the temperature dependence of the diffusion constant is controlled by the number of fully unbonded dendrimers. (literal)

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