WATER-SOLUBLE CHITOSAN-GOLD COMPOSITE NANOPARTICLES: PREPARATION BY RADIOLYSIS METHOD

摘要

Preparation of metal nanoparticles is one of the major research areas in nanotechnology. Metal colloid science had begun with the experiments of Michael Faraday on gold sols in the mid-nineteenth century. Many methods for preparation of metal nano-particles have been developed over the years since Faraday's experiments. Gold nano-particle has received much attention to study since it has been reported many advantages. The potential application of gold metallic nano-particles and their nano-composites has been widely studied in many fields: (i) physics, e.g. analytical probes; (ii) biology, e.g. biological markers; (iii) chemistry, e.g. catalysts; (iv) electronics and (v) materials. It is well known that metallic nano-particles has tendency to aggregate in the solution due to their small size. Therefore one of the effective ways to avoid the agglomeration of the particles is to use the stabilizing agents or protective agents, such as thiols, surfactants, and polymers. The stabilizer can control the particle size as well as prevent the agglomeration of metal particles.