GOLD NANOPARTICLES: SYNTHESIS,PROPERTIES AND APPLICATIONS
GOLD NANOPARTICLES In recent years, nanotechnology has been the topic of extensive research and a great deal of interest among researchers. The manufacturing and utilization of nanoparticles (NPs) has expanded dramatically as a result of the rapid development of nanotechnology. The term “nano” is derived from the Greek word “nanos” which means small and it is used as the prefix for one billionth part ( 10 -9 ). According to American Society for Testing and Materials (ASTM international 2006), nanoparticles are those particles which have two or more than two dimensions and are in the size range of 1 - 100 nm. These particles have special and enhanced physical and chemical properties as compared to their bulk materials due to their large reactive and exposed surface area and quantum size effect as a result of specific electronic structures. It can be broadly classified into semiconductor q uantum dots,magnetic nanoparticles,polymeric nanoparticles,carbon bas...