Issue |
Europhys. Lett.
Volume 69, Number 5, March 2005
|
|
---|---|---|
Page(s) | 758 - 762 | |
Section | Physics of gases, plasmas and electric discharges | |
DOI | https://doi.org/10.1209/epl/i2004-10420-2 | |
Published online | 28 January 2005 |
The size distribution of
nanoparticles prepared
by pulsed-laser ablation in pure
,
or
gas
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:
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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