Laser Synthesis of Colloidal Indium Oxide Nanoparticles in Liquid

Abstract

In this work, colloidal Indium oxide nanoparticles ($\text{In}_2\text{O}_3$ NPs) have been synthesized successfully by pulsed laser ablation of indium target in distilled water. The ablation was conducted using Nd:YAG laser operating at $1064\text{ nm}$ wavelength, $800\text{ mJ}$ laser energy and 300 pulses. The structural and optical characteristics of the synthesized nanoparticles were investigated. Field emission-scanning electron microscopy (FE-SEM) measurement revealed the production of spherical $\text{In}_2\text{O}_3$ NPs with mean size of around $42\text{ nm}$. Energy dispersive X-ray spectroscopy (EDS) certified the purity of the produced nanoparticles and the presence of In and O elements. Optical absorption spectrum of the produced colloidal shows a sharp absorption edge in UV region and the optical energy gap value was $3.85\text{ eV}$ for direct transition.