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DNA detection method based on the two-dimensional aggregation and selective desorption of nanoparticle probes
Authors:Charrier Anne  Candoni Nadine  Thibaudau Franck
Institution:Centre de Recherche en Matière Condensée et Nanosciences, Centre National de la Recherche Scientifique, Université de la Méditerranée, Marseille, France. charrier@crmcn.univ-mrs.fr
Abstract:A label-free two-dimensional colorimetric DNA sensor is reported. This sensor is based on the 2D aggregation of oligonucleotide-modified gold nanoparticle probes induced by the molecular hybridization of single-stranded oligonucleotide probes and their complementary single-stranded DNA targets. To detect the aggregation, we have developed a new detection method based on the selective desorption of nonaggregated nanoparticles. We will show here that this detection method is highly specific and allows the quantification of the DNA targets.
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