| Literature DB >> 16548591 |
Marité Cárdenas1, Justas Barauskas, Karin Schillén, Jennifer L Brennan, Mathias Brust, Tommy Nylander.
Abstract
The contribution of nonspecific interactions to the overall interactions of thiol-ssDNA and dsDNA macromolecules with gold nanoparticles was investigated. A systematic investigation utilizing dynamic light scattering and cryogenic transmission electron microscopy has been performed to directly measure and visualize the changes in particle size and appearance during functionalization of gold nanoparticles with thiol-ssDNA and nonthiolated dsDNA. The results show that both thiol-ssDNA and dsDNA do stabilize gold nanoparticle dispersions, but possible nonspecific interactions between the hydrophobic DNA bases and the gold surface promote interparticle interactions and cause aggregation within rather a short period of time. We also discuss the adsorption mechanisms of dsDNA and thiol-ssDNA to gold particles.Entities:
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Year: 2006 PMID: 16548591 DOI: 10.1021/la0530438
Source DB: PubMed Journal: Langmuir ISSN: 0743-7463 Impact factor: 3.882