Journal
JOURNAL OF THEORETICAL AND APPLIED PHYSICS
Volume 10, Issue 3, Pages 157-161Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s40094-016-0212-1
Keywords
Laser ablation; TiO2 nanoparticle; Absorption spectra; XRD; Exitonic resonance
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Effect of aging on the properties of titanium dioxide nanoparticles produced by laser ablation process in water is investigated experimentally. The fundamental wavelength of a Q-switched Nd:YAG laser was employed to irradiate a high-purity Ti plate in distilled water at temperatures of 20, 35, 50 and 65 A degrees C. Produced nanoparticles were diagnosed by UV-Vis-NIR spectroscopy, X-ray diffraction method, and dynamic light scattering device immediately after production and 1 week after. Bandgap energy of samples was extracted using Tauc method. Size of nanoparticles was increased after a week and their bandgap energy was decreased. Results show that the phase of TiO2 nanoparticles was transited from brookite to rutile after 1 week.
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