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The Strathprints institutional repository is a digital archive of University of Strathclyde research outputs. Strathprints provides access to thousands of Open Access research papers by University of Strathclyde researchers, including those from the School of Psychological Sciences & Health - but also papers by researchers based within the Faculties of Science, Engineering, Humanities & Social Sciences, and from the Strathclyde Business School.

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Highly sensitive detection of NADH using electrochemiluminescent nanocomposites

Devadoss, Anitha and Dennany, Lynn and Dickinson, Calum and Keyes, Tia E and Forster, Robert J. (2012) Highly sensitive detection of NADH using electrochemiluminescent nanocomposites. Electrochemistry Communications, 19. pp. 43-45. ISSN 1388-2481

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Abstract

Electrodes, modified with [Ru(bpy)2PVP10](ClO4)2 metallopolymer:gold nanoparticle composites, are used for the high sensitivity detection of nicotinamide adenine dinucleotide, NADH, using electrochemiluminescence, ECL; bpy is 2,2-bipyridyl and PVP is poly (4-vinylpyridine). Incorporation of 12.5 nm gold nanoparticles protected with 4-dimethylaminopyridine, DMAP-AuNPs, causes the overall ECL efficiency to decrease with increasing nanoparticle loading. However, the absolute emission intensity and signal-to-noise ratio are both higher for the nanocomposite than the parent metallopolymer. The ECL intensity depends linearly on [NADH] from 10 fM to 10 M with a limit of detection, LOD, of 5 fM. The wide dynamic range and low limit of detection makes these nanocomposite films attractive for biosensor development.