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Rapid Nanoprobe Signal Enhancement by In Situ Gold Nanoparticle Synthesis
Published on: March 7, 2018
Rapid-response and highly sensitive noncross-linking colorimetric nitrite sensor using 4-aminothiophenol modified
1Department of Agricultural and Biosystems Engineering, Iowa State University, Ames, Iowa 50011, USA.
Analytical Chemistry
|April 9, 2010
Abstract:
A novel colorimetric nitrite ion sensor was developed utilizing 4-aminothiophenol (4-ATP) modified gold nanorods (GNR). In the presence of nitrite ions, the deamination reaction was induced by heating the 4-ATP modified GNR in ethanol solution, resulting in the reduction of the GNR surface charges, which led to aggregation of GNRs and a colorimetric response that was quantitatively correlated to the concentration of nitrite ions. This simple assay was rapid (
