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Reference type: Journal
Authors: Riskin M, Tel-Vered R, Bourenko T, Granot E, Willner I
Article Title: Imprinting of Molecular Recognition Sites through Electropolymerization of Functionalized Au Nanoparticles: Development of an Electrochemical TNT Sensor Based on p-Donor-Acceptor Interactions.
Publication date: 2008
Journal: Journal of the American Chemical Society
Volume: 130
Issue: (30)
Page numbers: 9726-9733.
DOI: 10.1021/ja711278c

Abstract: Abstract: Electrochemical sensors for the analysis of TNT with enhanced sensitivities are described. The enhanced sensitivities are achieved by tailoring π-donora-cceptor interactions between TNT and π-donor-modified electrodes or π-donor-cross-linked Au nanoparticles linked to the electrode. In one configuration a p-aminothiophenolate monolayer-modified electrode leads to the analysis of TNT with a sensitivity corresponding to 17 ppb (74 nM). In the second configuration, the cross-linking of Au NPs by oligothioaniline bridges to the electrode yields a functionalized electrode that detects TNT with a sensitivity that corresponds to 460 ppt (2 nM). Most impressively, the imprinting of molecular TNT recognition sites into the π-donor oligoaniline-cross-linked Au nanoparticles yields a functionalized electrode with a sensitivity that corresponds to 46 ppt (200 pM). The electrode reveals high selectivity, reusability, and stability
Template and target information: TNT, trinitrotoluene

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