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DNA Binding to Fluorescent Ruthenium Species Released from Calcium Phosphate/Nanoporous Silicon Structures

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Abstract:

This work centers on an analysis of calf thymus DNA binding to emissive Ru complexes which diffuse from biocompatible calcium phosphate/nanoporous silicon films. These nanostructures were characterized by scanning electron microscopy, atomic force microscopy, energy dispersive X-ray analysis, and infrared vibrational spectroscopy. In terms of polynucleotide binding, three different systems were analyzed: (1) an aqueous solution of Ru(phen)32+ (a control); (2) surface-adsorbed Ru(phen)32+ onto undoped calcium phosphate/porous Si/Si in aqueous solution; (3) as-prepared and annealed Ru(phen)32+-doped calcium phosphate/porous Si structures in water. For films with fluorescent Ru originally embedded throughout the film, biphasic diffusion character is found; such behavior is attributed to DNA binding to both surface-bound Ru(phen)32+ and species which originate from deeper regions of the film.

Keywords: DNA BINDING; NANOPOROUS SILICON; POLYNUCLEOTIDE; RU COMPLEXES

Document Type: Research Article

DOI: http://dx.doi.org/10.1166/jnn.2002.102

Affiliations: Department of Chemistry, Texas Christian University, Ft. Worth, Texas, USA

Publication date: July 1, 2002

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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