Print ISSN: 1681-6900

Online ISSN: 2412-0758

Keywords : Pulsed


One-Step Synthesis of Copper Oxide Nanoparticles UsingPulsed Laser Ablation in Water: Influence of the Laser Wavelengths on Optical Properties

Abdulrahman K. Ali

Engineering and Technology Journal, 2013, Volume 31, Issue 7, Pages 0-0

Laser ablation has proven to be an effective method for generating nanoparticles. In this work, we have successfully produced pure cupper nanoparticles in fast and one-step method by Nd-YAG irradiation of cupper target with a 1064 and 532 nm laser wavelengths in pure water. The particle size, shape and size distributions were measured using a transmission electron microscope TEM. The UV–VIS spectroscopy has been employed for the optical properties. Nanoparticles with diameters 30 nm were observed to be formed in the colloidal solution. The UV–VIS spectrum of the material shows weak plasmon peak around 620 nm, indicating the formation of copper oxide nanoparticles. A clear blue shift is observed in the direct band gap (4.3 eV) of these nanoparticles presumably to the quantum confinement effects exerted by the nanosize.

Preparation of Silver Nanoparticles by Pulsed Laser Ablation in Liquid Medium

Abdulrahman Khalaf Ali; Dayah N. Raouf

Engineering and Technology Journal, 2011, Volume 29, Issue 15, Pages 3058-3066

Silver nanoparticles were synthesized by pulsed laser ablation (Q-switched Nd:YAG, ë=1064nm, 10 ns pulse duration and E=100-900 mJ) of pure Ag metal plate immersed in double distilled and deionised water DDDW. Spectral measurements, such as surface plasmon extinction SPE spectra of the produced nanoparticles solution were measured. The size and concentrations measurements of produced nanoparticles were estimated. UV-VIS absorption spectra of produced solution show a sharp peak around 400 nm, indicating the produced Ag nanoparticles with a narrow size ranging from 5 to 50 nm with almost spherical shape.