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Ultrasensitive DNA detection using oligonucleotide-silver nanoparticle conjugates

Thompson, D.G. and Enright, A. and Faulds, K. and Smith, W.E. and Graham, D. (2008) Ultrasensitive DNA detection using oligonucleotide-silver nanoparticle conjugates. Analytical Chemistry, 80 (8). pp. 2805-2810. ISSN 0003-2700

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Oligonucleotide−gold nanoparticle (OGN) conjugates are powerful tools for the detection of target DNA sequences due to the unique properties conferred upon the oligonucleotide by the nanoparticle. Practically all the research and applications of these conjugates have used gold nanoparticles to the exclusion of other noble metal nanoparticles. Here we report the synthesis of oligonucleotide−silver nanoparticle (OSN) conjugates and demonstrate their use in a sandwich assay format. The OSN conjugates have practically identical properties to their gold analogues and due to their vastly greater extinction coefficient both visual and absorption analyses can occur at much lower concentrations. This is the first report of OSN conjugates being successfully used for target DNA detection and offers improved sensitivity which is of interest to a range of scientists.

Item type: Article
ID code: 17082
Keywords: Ultrasensitive DNA Detection, oligonucleotide−silver nanoparticle (OSN), Oligonucleotide−gold nanoparticle (OGN), conjugates, Chemistry, Physical and theoretical chemistry, Analytical Chemistry
Subjects: Science > Chemistry
Science > Chemistry > Physical and theoretical chemistry
Department: Faculty of Science > Pure and Applied Chemistry
Depositing user: Strathprints Administrator
Date Deposited: 28 Apr 2010 15:22
Last modified: 21 May 2015 11:46

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