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Gold Nanoparticle Response to Nitro-Compounds Probed by Cavity Ring-Down Spectroscopy



A C. Pipino, Vitalii I. Silin


The optical response of Au nanoparticles to adsorption of NO2, SO2, C6H5NO2, and 2,4-dinitrotoluene (DNT) is probed using the cavity ring-down technique. A uniquely sensitive response, which appears characteristic of the -NO2 group, is observed for the surface plasmon resonance (SPR) of an approximately Gaussian distribution of Au nanoparticles having a mean diameter of 4.5 nm. Detection limits of 1.2 nmol/L, 7.6 nmol/L, and 0.17 nmol/L, are estimated for NO2, C6H5NO2, and DNT, respectively, while SO2 shows no response.
Chemical Physics Letters
No. 4-6


adsorption, cavity ring-down, chemical sensing, explosives detection, nanoparticles, surface plasmon resonance


Pipino, A. and Silin, V. (2005), Gold Nanoparticle Response to Nitro-Compounds Probed by Cavity Ring-Down Spectroscopy, Chemical Physics Letters (Accessed December 10, 2023)
Created March 1, 2005, Updated February 17, 2017