Heavy-metal ion sensors using chitosan-capped gold nanoparticles
作者： A. Sugunan , C. Thanachayanont , J. Dutta , J.G. Hilborn
DOI: 10.1016/J.STAM.2005.03.007
关键词: Metal 、 Inorganic chemistry 、 Metal ions in aqueous solution 、 Nanoparticle 、 Chitosan 、 Chelation 、 Polymer 、 Materials science 、 Colloid 、 Colloidal gold
摘要: We report a novel strategy for using gold nanoparticles capped with chitosan sensing ions of heavy metals. Acidic anions (glutamate in our case) are expected to cap the nanoparticle surfaces similar conventional methods stabilization by citrate ions. The polycationic nature enables attachment polymer negatively charged through electrostatic interactions. Use serves dual purpose providing sufficient steric hindrance ensuring stability colloid and also functionalize use as sensors. well-documented chelating properties sensitivity optical agglomeration have been employed detect low concentrations metals (Zn2+ Cu2+) water. A comparison absorption spectra colloidal suspension before after exposure metal is good indicator concentration
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