Preparation of colloidal In2O3 nanoparticles using nanosecond laser ablation in water

Pulsed laser ablation in liquid (PLAL) was used to synthesise indium oxide (In₂O₃) nanocolloidal suspension. Colloidal In₂O₃ nanoparticles (NPs) are synthesised by pulsed laser ablation of high-purity indium target in distilled water with various laser fluences at room temperature. UV-vis absorption and transmission electron microscopy were conducted to determine the bandgap, size, distribution and shape of the NPs. The optical properties, size and the morphology of the synthesised In₂O₃ were influenced strongly by laser fluence and wavelength. Laser ablation of indium in water produced spherical In₂O₃ NPs with an average size of 30 nm and their distribution was nearly Gaussian type.