Dose dependence of room temperature photoluminescence from Si implanted SiO 2
Dose dependence of room temperature photoluminescence from Si implanted SiO 2
. Journal of Luminescence 80 (1999) 21 3 21 6
Dose dependence of room temperature photoluminescence
from Si implanted SiO
S. Cheylan*, N.B. Manson, R.G. Elliman
Research School of Physical Science. Silica; Photoluminescence; Ion-implantation; Light emission; Photonics
1. Introduction
The optical properties of Si nanocrystals in SiO
have been studied extensively since visible room
temperat...
Tài liệu Báo cáo Y học: Temperature dependence of thermodynamic properties for DNA/DNA and RNA/DNA duplex formation pdf
. Department of Chemistry, The Pennsylvania State
University, University Park, PA 168 02, USA.
(Received 31 October 20 01, revised 30 January 20 02,
accepted 30 January 20 02)
Eur. J. Biochem. 26 9, 28 21 28 30. 52. 8 137 .2 10 .22 48.6 120 .6 12. 61 58.5
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dAGTCCTGA/d 24 .4–40.4 0.70 0.69 0.70 48.8 133 .2 7.45 40.4 105...
Temperature dependence of morphology and diameter of silicon nanowires synthesized by laser ablation
. Laboratory, Center for Physical Sciences, University of Science and Technology of China, Hefei 23 0 026 , China
Received 15 March 20 02
Abstract
The silicon nanowires (SiNWs) with different diameters. while SiNWs and silicon nanoparticle chains of smaller diameters in
higher temperature zone (960–1 120 °C). The distribution of the morphology and diameter of SiNWs as a function of
growth tempera...
Temperature dependence of the quality of silicon nanowires produced over a titania supported gold catalyt
. Chemical Physics Letters 377 (20 03) 377–383 379
samples were analyzed by XPS. The XPS intensity
ratio of Si (2p) to Ti (2p
3 =2
+2p
1 =2
) can be taken as
a relative measure of the Si nanowire density.. activity
enhancement as been titania, TiO
2
[20 22 ]. In the
production of Si nanowires, we may expect that
the decomposition of the silane precursor can be
accelerated by the presence of a...
la nanotubes sensor for room temperature detection of ammonia
. and a gap size of 8 m. The IDE
fingers were made by sputtering 20 -nm Ti and 40-nm Pt on a layer
of silicon dioxide (SiO
2
) thermally grown on top of a silicon wafer.
The suspension of LSCO was. precision impedance analyzer (Agilent
429 4a).
3. Results and discussions
Fig. 2 illustrates the SEM images of LSCO nanotubes on micro-
electrodes. It can be seen in Fig. 2, the diameter of the. Lab...
room temperature ammonia sensing properties of w18o49 nanowires
. (20 09) 27 –31 29
Fig. 4. Electrical response of the WONWs film to 20 0 ppm NH
3
.
emission peak at 369 nm (3.36 eV) assigned to band–band transi-
tion and a strong blue emission peak at 423 nm (2. 94. Division of Materials, Mechanics and Structures, Faculty of Engineering, The University of Nottingham, University Park,
Nottingham NG7 2RD, UK
article info
Article history:
Received 10 July 20 08...
synthesis, growth mechanism and room-temperature blue luminescence emission of uniform wo3 nanosheets with w as starting material
. the emission
peaks of the as-synthesized WO
3
nanosheets consist of two UV
emissions at $3 62 and 398 nm and three blue luminescence
emissions at $431 (2. 88 eV), 486 (2. 55 eV) and 497 nm (2. 4 9. Intensity/(a.u.)
20 30
2 /(°
°
)
Temperature (
°
C)
40 50 60 70 80
50 100 150 20 0 25 0 300 350 400
( 121 )
(22 1)
(0 02)
(400)
WO
3
WO
3
. H
2
O
Fig. 1. (a) XRD patterns and (b) TGA curves of...
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