Raman spectra of nanocrystalline carbon nitride synthesized on cobalt-covered substrate by nitrogen-atom-beam-assisted pulsed laser ablation

2002 ◽  
Vol 92 (1) ◽  
pp. 496-500 ◽  
Author(s):  
Ning Xu ◽  
Fuming Cui ◽  
Hao Lin ◽  
Zhifeng Ying ◽  
Jiada Wu ◽  
...  
Keyword(s):  
Laser Ablation ◽  
Nitrogen Atom ◽  
Raman Spectra ◽  
Carbon Nitride ◽  
Pulsed Laser ◽  
Pulsed Laser Ablation ◽  
Atom Beam

Synthesis of carbon nitride nanocrystals on Co/Ni-covered substrate by nitrogen-atom-beam-assisted pulsed laser ablation

2003 ◽  
Vol 18 (11) ◽  
pp. 2552-2555 ◽  
Author(s):  
Ning Xu ◽  
Hao Lin ◽  
Li Li ◽  
Weijian Pan ◽  
Jian Sun ◽  
...  
Keyword(s):  
Laser Ablation ◽  
Nitrogen Atom ◽  
Carbon Nitride ◽  
Pulsed Laser ◽  
Pulsed Laser Ablation ◽  
Synthesis Process ◽  
X Ray Diffraction ◽  
Atom Beam ◽  
Transmission Electron ◽  
Deposited Films

Carbon nitride nanocrystals were synthesized on Co/Ni-covered Si(100) wafers using a nitrogen-atom-beam-assisted pulsed laser ablation deposition method. Transmission electron miscroscopy, x-ray diffraction, and Raman spectroscopy showed that as-deposited films were constructed primarily from nanometer-sized β-C3N4 and CNx crystallites. The co-catalyzation by the cobalt and nickel in the synthesis process is considered to play an important role in the formation of nanocrystalline β-C3N4. The reasons for the formation of carbon nitride nanocrystals were analyzed.

Deposition of nanocrystalline CNx thin films on Co/Ni-covered substrate by nitrogen-atom-beam-assisted pulsed laser ablation

2004 ◽  
Vol 320 (4) ◽  
pp. 297-301 ◽  
Author(s):  
Ning Xu ◽  
Li Li ◽  
Hao Lin ◽  
Jiada Wu ◽  
Aiming Wu ◽  
...  
Keyword(s):  
Thin Films ◽  
Laser Ablation ◽  
Nitrogen Atom ◽  
Pulsed Laser ◽  
Pulsed Laser Ablation ◽  
Atom Beam

Micro Raman Spectroscopy of Silicon Nanocrystals Produced by Picosecond Pulsed Laser Ablation

2002 ◽  
Vol 738 ◽  
Author(s):  
M. H. Wu ◽  
R. Mu ◽  
A. Ueda ◽  
D. O. Henderson ◽  
B. Vlahovic
Keyword(s):  
Laser Ablation ◽  
Raman Spectra ◽  
Silicon Nanocrystals ◽  
Pulsed Laser ◽  
Pulsed Laser Ablation ◽  
Size Distributions ◽  
Laser Plume ◽  
Force Microscopy ◽  
Atomic Force

ABSTRACTPulsed laser ablation has been used to produce silicon nanocrystals. Variation of the laser fluence, backing gas type and pressure result in nanocrystals with controllable size distributions. Properties of nanocrystals produced with this method also depend on the distance of the nanocrystal from the center of the laser plume. Correlated atomic force microscopy and in-situ micro-Raman measurements confirm that particle size decreases as distance from the plume center increases. Silicon peaks in the micro raman spectra taken at increasing distance from plume center show considerable differences in both center energy and width. Confocal micro raman spectra from thicker (> 10 micron) samples show little variation with depth, in contrast with porous silicon samples.

Optical studies of carbon nitride thin films deposited by reactive pulsed laser ablation of a graphite target in low pressure ammonia

1998 ◽  
Vol 323 (1-2) ◽  
pp. 72-78 ◽  
Author(s):  
I.N Mihailescu ◽  
E Gyorgy ◽  
R Alexandrescu ◽  
A Luches ◽  
A Perrone ◽  
...  
Keyword(s):  
Thin Films ◽  
Laser Ablation ◽  
Carbon Nitride ◽  
Pulsed Laser ◽  
Pulsed Laser Ablation ◽  
Low Pressure ◽  
Graphite Target ◽  
Optical Studies

Deposition of carbon nitride films by reactive sub-picosecond pulsed laser ablation

2000 ◽  
Vol 373 (1-2) ◽  
pp. 266-272 ◽  
Author(s):  
S. Acquaviva ◽  
A. Perrone ◽  
A. Zocco ◽  
A. Klini ◽  
C. Fotakis
Keyword(s):  
Laser Ablation ◽  
Carbon Nitride ◽  
Pulsed Laser ◽  
Pulsed Laser Ablation

scholarly journals Laser Induced Anchoring of Nickel Oxide Nanoparticles on Polymeric Graphitic Carbon Nitride Sheets Using Pulsed Laser Ablation for Efficient Water Splitting under Visible Light

Nanomaterials ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 1098 ◽  
Author(s):  
Umair Baig ◽  
Abuzar Khan ◽  
Mohammad A. Gondal ◽  
Mohamed A. Dastageer ◽  
Wail S. Falath
Keyword(s):  
Laser Ablation ◽  
Visible Light ◽  
Nickel Oxide ◽  
Band Gap ◽  
Water Splitting ◽  
Carbon Nitride ◽  
Pulsed Laser ◽  
Pulsed Laser Ablation ◽  
Photocurrent Density ◽  
Photoelectrochemical Performance

A visible-light-active nickel oxide–graphitic carbon nitride (NiO@g-CN) hetero-structured nanocomposite was synthesized for the first time by pulsed laser ablation in liquid and used as a photoanode material in photoelectrochemical water-splitting reaction with a solar simulator. It was found that the photoelectrochemical performance of PLAL synthesized NiO@g-CN nanocomposite as photoanode, compared to g-CN as photoanode showed fourfold enhancements in photocurrent density under visible light. FT-IR, XRD, FE-SEM, and EDX consistently showed the proper anchoring of nano-sized NiO on g-CN. UV-DRS and the band gap estimation showed the narrowing down of the band gap energy and consequent enhancement in the visible-light absorption, whereas photoluminescence spectroscopy confirmed the reduction of the recombination of photo-excited electron hole pairs as a result of the anchoring of NiO on g-CN. The photoelectrochemical performance of g-CN and the NiO@g-CN nanocomposite photoanodes was compared by linear sweep voltammetry (LSV), Chronoamperometry (I-t), and Electrochemical Impedance Spectroscopy (EIS). All of these results of the characterization studies account for the observed fourfold enhancement of photocurrent density of NiO@g-CN nanocomposite as photoanode in the photoelectrochemical reaction.

Deposition of carbon nitride films by reactive pulsed-laser ablation at high fluences

1999 ◽  
Vol 8 (2-5) ◽  
pp. 582-585 ◽  
Author(s):  
A Zocco ◽  
A Perrone ◽  
E D'Anna ◽  
G Leggieri ◽  
A Luches ◽  
...  
Keyword(s):  
Laser Ablation ◽  
Carbon Nitride ◽  
Pulsed Laser ◽  
Pulsed Laser Ablation ◽  
High Fluences
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