Articles
  • Parameter dependence of nickel oxide nanoparticles prepared by pulsed-laserablation 
  • Leszek Zbroniec, Takeshi Sasaki and Naoto Koshizaki*
  • Nanoarchitectonics Research Center, National Institute of Advanced Industrial Science and Technology, Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan
Abstract
Nickel oxide nanoparticles were fabricated by a laser ablation technique using the third harmonic of an Nd:YAG laser and sintered NiO targets in an on-axis configuration under argon pressures of 0.67, 1.33, and 2.00 Pa. The effects of the number of irradiating laser pulses, gas pressure, and target-to-substrate (T-S) distance on the average particle size, size distribution, and particle areal density were investigated. The nanoparticles obtained were always crystalline and 2 to 6 nm in diameter, irrespective of the preparation conditions as determined by high-resolution transmission electron microscopic (HRTEM) analysis. The average particle size increased with the number of laser pulses, indicating the particle growth on the substrate. The particle areal density was strongly affected by the target-to-substrate distance. The formation process of the nanoparticles is also discussed.

Keywords: Laser ablation, Nickel oxide, Nanoparticle, Pressure, and Target-substrate distance

This Article

  • 2005; 6(2): 134-137

    Published on Jun 30, 2005

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