Optical properties of Zinc Oxide/Polymer Nanocomposite

摘要

ZnO/ PEG Nanocomposite material is synthesized by laser ablation of pure Zn target in the mix solution of PEG and of water in different compositions. Synthesized Nanocomposite materials are characterized by using UV-visible absorption, Transmission electron microscope (TEM) and Photoluminescence (PL) spectroscopic techniques. TEM investigation illustrates synthesis of few 2-5 nm quantum dots with very narrow size distribution. UV-visible absorption spectrum of quantum dots (QDs) synthesized in 30 ml water and 10 ml PEG (3:1 v/v) have small intensity of SPR peak corresponding to ZnO as compared to the peak corresponding to core transition electron. As the PEG concentration increases SPR peak corresponding to ZnO raises. It insures that PEG helps in the oxidation of Zn clusters to make ZnO. Possible synthesis mechanism is also discussed.