TY - JOUR
T1 - Imprinting of molecular recognition sites through electropolymerization of functionalized Au nanoparticles
T2 - Development of an electrochemical TNT sensor based on π-donor-acceptor interactions
AU - Riskin, Michael
AU - Tel-Vered, Ran
AU - Bourenko, Tatyana
AU - Granot, Eran
AU - Willner, Itamar
PY - 2008/7/30
Y1 - 2008/7/30
N2 - Electrochemical sensors for the analysis of TNT with enhanced sensitivities are described. The enhanced sensitivities are achieved by tailoring π-donor-acceptor 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.
AB - Electrochemical sensors for the analysis of TNT with enhanced sensitivities are described. The enhanced sensitivities are achieved by tailoring π-donor-acceptor 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.
UR - http://www.scopus.com/inward/record.url?scp=48249098462&partnerID=8YFLogxK
U2 - 10.1021/ja711278c
DO - 10.1021/ja711278c
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AN - SCOPUS:48249098462
SN - 0002-7863
VL - 130
SP - 9726
EP - 9733
JO - Journal of the American Chemical Society
JF - Journal of the American Chemical Society
IS - 30
ER -