The size distribution of nanoparticles prepared by pulsed-laser ablation in pure , or gasG. S. Fu1, Y. L. Wang1, L. Z. Chu1, Y. Zhou1, W. Yu1, L. Han1 and Y. C. Peng2
1 College of Physics Science and Technology, Hebei University Baoding 071002, PRC
2 College of Electronic and Informational Engineering, Hebei University Baoding 071002, PRC
received 19 October 2004; accepted in final form 3 January 2005
published online 28 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.
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