Thesis (M.Sc.)--Chulalongkorn University, 2013

In this research, silver nanoplates were fabricated by a novel method which is simple, fast, size controllable, waste free, and environmentally friendly. For synthesis procedure, hydrogen peroxide functions as both reducing and oxidizing agent. Due to the dual functions of hydrogen peroxide, it can transform various types of silver derivatives such as silver ion, silver oxide, and silver nanoparticles to silver nanoplates. According to the discovery of optimal hydrogen peroxide concentrations, this method can synthesize silver nanoplates with controlled the optical property in 2 minutes. For silver nanoplates with the lateral size greater than 400 nm having shiny white reflection, it is found that the nanoplates can be synthesized under alkaline condition without any addition of stabilizer. The as-prepared silver nanoplates from this method are highly stable. Therefore, the product can be kept for long term use. This method can be scale up for mass production.