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http://dx.doi.org/10.6111/JKCGCT.2013.23.4.167

Effect of deposition pressure on the morphology of TiO2 nanoparticles deposited on Al2O3 powders by pulsed laser deposition  

Choi, Bong Geun (Division of Materials Science and Engineering, Hanyang University)
Kim, So Yeon (Division of Materials Science and Engineering, Hanyang University)
Park, Cheol Woo (Division of Materials Science and Engineering, Hanyang University)
Park, Jae Hwa (Division of Materials Science and Engineering, Hanyang University)
Hong, Yoon Pyo (Division of Materials Science and Engineering, Hanyang University)
Shim, Kwang Bo (Division of Materials Science and Engineering, Hanyang University)
Publication Information
Journal of the Korean Crystal Growth and Crystal Technology / v.23, no.4, 2013 , pp. 167-172 More about this Journal
Abstract
Titanium dioxides nanoparticles coated aluminum oxide powders were fabricated by pulsed laser deposition (PLD) with Nd : YAG laser at 266 nm. The Pulse laser energy is 100 mJ/pulse. During the irradiation of the focused laser on the $TiO_2$ target, Ar gas is supplied into the chamber. The gas pressure is varied in a range of $1{\times}10^{-2}$ to 100 Pa. Titanium dioxides nanoparticles deposited aluminum oxide powders were characterized by using energy dispersive X-ray spectroscopy (EDX), high resolution transmission electron microscopy (HR-TEM), in order to understand the effect of Ar background gas on surface morphology and properties of the powders. The coated $TiO_2$ nanoparticles had nanosized spherical shape and the crystallite sizes of 10~30 nm. The morphology of coated $TiO_2$ nanoparticles is not affected by gas pressure. However, the particle size and crystallinity slightly increased with the increase of gas pressure. According to this technique, the size and crystallinity of nanoparticles can be easily controlled by controlling pressure during the laser irradiation.
Keywords
Nanoparticles; Pulsed laser deposition; Coating; Morphology; $TiO_2$;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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