Efficient polyglycine modified Au electrode for the detection of hydrazine

A highly efficient and environmentally benign electrode has been developed for the easy and fast detection of hydrazine by modifying a gold electrode with polyglycine. The polymerization of glycine on a Au electrode was carried out by cyclic voltammetry. A detailed investigation of the oxidation of hydrazine on the electrode was carried out by cyclic voltammetry (CV), chronocoulometry (CC) and amperometry in 0.02 M phosphate buffer (PBS), pH 7.4 as supporting electrolyte with Ag/AgCl as reference electrode. A very low detection limit (16 nM) (S/N = 5) and a good linearity in current with high sensitivity (1.2 μA μM-1 cm-2) over a concentration range of 16 nM to 259 μM was achieved by the amperometry technique. The electrode shows good selectivity in presence of many other species and is stable for nearly ten repetitive experiments. © 2012 The Royal Society of Chemistry

Highly stable Ag nanoparticles in agar-agar matrix as inorganic-organic hybrid

cited By 15International audienceA novel synthesis of inorganic-organic hybrid films containing well dispersed and almost uniform size Ag nanoparticles in agar-agar matrix has been reported. The films are found to be highly stable for more than a year. The colloidal particles of Ag can be obtained in large quantities in the form of a film or in the gel form when dispersed in agar-agar or by dissolving in a suitable solvent as solution. Characterization has been done by UV-visible spectroscopy and TEM. The hybrid may be of interest to study third-order non-linear susceptibility