Metals and metal oxides particles produced by pulsed laser ablation under high vacuum

Authors : Khurram SIRAJ, Yasir SOHAIL and Aasma TABASSUM

Pages : 179-183

Doi:10.3906/kim-1210-57

View : 13 | Download : 4

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :A pulsed KrF Excimer laser insert ignore into journalissuearticles values(248 nm, 15 mJ); was utilized to synthesize different particles on insert ignore into journalissuearticles values(111); Si substrate under vacuum \sim 10-6 torr using Aluminum insert ignore into journalissuearticles values(Al);, Platinum insert ignore into journalissuearticles values(Pt);, Tungsten insert ignore into journalissuearticles values(W);, Molybdenum insert ignore into journalissuearticles values(Mo);, Cadmium Oxide insert ignore into journalissuearticles values(CdO);, and Yttrium Oxide insert ignore into journalissuearticles values(Y2O3); targets. Scanning electron microscope insert ignore into journalissuearticles values(SEM); was used to study particle size distribution on silicon substrate. The size of individual metal particles was found to be ranging from 71 nm to 2 m m whereas metal oxides particles were found in the range of 71 nm to 1.1 m m. The particles below 100 nm are formed by gas phase condensation of ions, atoms and molecules whereas particles greater than 100 nm size results either from the ejection of liquid droplets from the melt surface or stresses induced by laser on target surface. The advantage of particle formation due to laser ablation in high vacuum is pure particles production.
Keywords : Laser ablation, nanoparticles, high vacuum