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INFLUENCE OF THE EXPERIMENTAL PARAMETERS ON SILICON NANOPARTICLES PRODUCED BY LASER ABLATION

C. Grigoriu1,* , I. Nicolae1, V. Ciupina2, G. Prodan2, H. Suematsu3, K. Yatsui3

Affiliation

  1. National Institute for Laser, Plasma and Radiation Physics, Laser Department, Atomistilor 409, P.O.Box MG 36, Bucharest-Magurele, Romania
  2. “Ovidius” University, Scientific Research Center for Micro and Nanostructures Mamaia 124, Constanta, 8700, Romania
  3. Nagaoka University of Technology, Extreme Energy-Density Research Institute, Nagaoka, Niigata, 944-2188, Japan

Abstract

Influence of the laser wavelength, fluence, gas and gas pressure on silicon nanoparticles produced by laser ablation is reported. Nanoparticles ranging from 2 nm to 13 nm were generated by ablation of silicon target into He or Ar, (250-550 mbar) with a Nd:YAG laser, (335 and 532 nm, 5 ns), at a fluence of 4-8 J/cm2. The shape, structure, and size distribution were determined by transmission electron microscopy. 90% of nanoparticles were in the range 2-10 nm, regardless pressure, wavelength or fluence. The wavelength 355 nm and higher fluence, 8 J/cm2, are more suitable for smaller nanoparticle synthesis (2-5 nm). The optimal conditions for an efficient synthesis of minimum sized silicon nanoparticles were 355 nm / 8 J/cm2 / 550 mbar / He..

Keywords

Laser ablation, Silicon nanoparticles, Primary particle size.

Submitted at: April 21, 2004
Accepted at: June 22, 2004

Citation

C. Grigoriu, I. Nicolae, V. Ciupina, G. Prodan, H. Suematsu, K. Yatsui, INFLUENCE OF THE EXPERIMENTAL PARAMETERS ON SILICON NANOPARTICLES PRODUCED BY LASER ABLATION, Journal of Optoelectronics and Advanced Materials Vol. 6, Iss. 3, pp. 825-830 (2004)