Volume 69, Number 5, March 2005
|Page(s)||758 - 762|
|Section||Physics of gases, plasmas and electric discharges|
|Published online||28 January 2005|
The size distribution of nanoparticles prepared by pulsed-laser ablation in pure , or gas
College of Physics Science and Technology, Hebei University Baoding 071002, PRC
2 College of Electronic and Informational Engineering, Hebei University Baoding 071002, PRC
Accepted: 3 January 2005
Nanocrystalline silicon films were prepared by pulsed-laser ablation in high-purity , or gas at room temperature under a deposition pressure of 10. The Raman and X-ray diffraction spectra indicate that the films are nanocrystalline. Scanning electron microscopy images show that or gas, compared to gas, yields smaller and more uniform-sized nanoparticles at the same deposition conditions, which is also confirmed by the blue-shifted and narrower peaks obtained in photoluminescence measurement. gas induces the smallest and most uniform, in size, nanoparticles among all the three gases, which may be attributed to a more effective energy transfer between and atoms resulting from the adjacent degree of the atomic weights.
PACS: 52.38.Mf – Laser ablation / 61.46.+w – Nanoscale materials: clusters, nanoparticles, nanotubes, and nanocrystals / 79.20.Ds – Laser-beam impact phenomena
© EDP Sciences, 2005
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