Abstract
A study was conducted to show the successful synthesis of Cu nano-octahedra and investigate their optical properties both experimentally and theoretically. In a typical synthesis of Cu nano-octaheda, precursor solution was prepared by mixing 2 mmol CuCl and 2 mL trioctylphosphine (TOP) in a vial preheated at 200 °C for 2 hours. 18 mL of oleylamine (OLA) was added into a three-necked flask and kept under a flow of high-purity argon gas for 40 minutes with vigorous stirring. It was observed that during the reaction, the color of the solution changed from bright yellow to red-brown, indicating the formation of the Cu nano-octahedra.