Graduation Year

2005

Document Type

Thesis

Degree

M.S.

Degree Granting Department

Physics

Major Professor

Dr. Sarath Witanachchi.

Keywords

Titanium carbide, Thin films, Ferrous oxide, Drop casting, Nanoparticles

Abstract

This thesis describes a new Laser-Assisted Spray Pyrolysis technique developed to grow nanoparticle coatings with controllable particle sizes. In this method, droplets of a precursor formed by a nebulizer are injected into a growth chamber using SF6 carrier gas. An experimental study and a computational model to investigate the particle size dependence on various growth parameters have been carried out. The results show that heating of 1.5and#61549;m droplets of metalorganic precursor in a carrier gas using a CO2 laser resulted in the formation of TiC and Fe3O4 particles with diameters in the range of 50-60nm. Also the results show that by reducing the concentration of the metal organic precursor the diameter of the deposited particles can be reduced.

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