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Molecular dynamics simulations of the adsorption and dynamical behavior of single DNA components on TiO2

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Monti, Susanna and Walsh, Tiffany R. (2011) Molecular dynamics simulations of the adsorption and dynamical behavior of single DNA components on TiO2. The Journal of Physical Chemistry Part C: Nanomaterials, Interfaces and Hard Matter, Vol.115 (No.49). pp. 24238-24246. doi:10.1021/jp207950p

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Official URL: http://dx.doi.org/10.1021/jp207950p

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Abstract

The adsorption of the four DNA bases (adenine, guanine, thymine, and cytosine) on a mineral surface (titanium dioxide) is studied through classical molecular dynamics simulations and potential of mean constrained force calculations to give a reliable description of their binding behavior, identify the best binding arrangement, and quantify the strength of their interactions with the inorganic surface. Several configurations are identified, and the analysis of the data has revealed that the general tendency is to adsorb on structured solvent layers, which are in direct contact with the substrate. In this region, the molecules are perpendicular to the slab most of the time, do not adopt a preferential orientation, and explore different areas of the interposing water layers. Frequent escape into the bulk solvent is observed, suggesting that the interactions between the bases and the solvent layers are not strong enough to keep the molecule close to the surface.

Item Type: Journal Article
Divisions: Faculty of Science > Chemistry
Journal or Publication Title: The Journal of Physical Chemistry Part C: Nanomaterials, Interfaces and Hard Matter
Publisher: American Chemical Society
ISSN: 1932-7447
Official Date: 2011
Dates:
DateEvent
2011Published
Volume: Vol.115
Number: No.49
Page Range: pp. 24238-24246
DOI: 10.1021/jp207950p
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access

Data sourced from Thomson Reuters' Web of Knowledge

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