title: Preparation of nanosized gold particles in a biopolymer using UV photoactivation.
abstract: Gold nanoparticles have been prepared by UV photoactivation in the presence of a biopolymer, sodium alginate. The particles are characterized by UV-vis spectra and TEM studies. Both particle size and the UV-visible absorption peak are dependent on the sodium alginate concentration. The effects of various other parameters such as change of light source, cell material of the reaction chamber, heating effect, irradiation time, and HAuCl4 concentration are studied. The particles are spherical and in situ stabilized by the biopolymer. The method is very simple and reproducible.
authors.affiliation: Department of Civil Engineering, Indian Institute of Technology, Kharagpur 721302, India. anjalipal@civil.iitkgp.ernet.in
authors.forename: Anjali
authors.initials: A
authors.lastname: Pal
authors.forename: Kunio
authors.initials: K
authors.lastname: Esumi
authors.forename: Tarasankar
authors.initials: T
authors.lastname: Pal
mesh_terms: D000464:Alginates / Q000737:chemistry / Q000528:radiation effects; D001704:Biopolymers / Q000737:chemistry / Q000528:radiation effects; D020723:Glucuronic Acid / Q000737:chemistry / Q000528:radiation effects; D006046:Gold / Q000737:chemistry / Q000528:radiation effects; D006603:Hexuronic Acids / Q000737:chemistry / Q000528:radiation effects; D046529:Microscopy, Electron, Transmission / Q000379:methods; D049329:Nanostructures / Q000737:chemistry*; D010316:Particle Size; D012680:Sensitivity and Specificity; D013056:Spectrophotometry, Ultraviolet / Q000379:methods; D013499:Surface Properties; D014466:Ultraviolet Rays
chemical_list: D000464:Alginates; D001704:Biopolymers; D006603:Hexuronic Acids; D006046:Gold; D020723:Glucuronic Acid