scholarly journals Investigation of Silicon Carbide Polytypes by Raman Spectroscopy

2014 ◽  
Vol 51 (3) ◽  
pp. 51-57 ◽  
Author(s):  
G. Chikvaidze ◽  
N. Mironova-Ulmane ◽  
A. Plaude ◽  
O. Sergeev
Keyword(s):  
Crystal Structure ◽  
Silicon Carbide ◽  
Raman Spectroscopy ◽  
Vapour Deposition ◽  
Chemical Vapour ◽  
Stacking Faults ◽  
Sem Analysis ◽  
X Ray Diffraction ◽  
X Ray ◽  
Scanning Electron

Abstract Polytypes of colourless and coloured single crystals of silicon carbide (SiC) grown on SiC substrates by chemical vapour deposition are studied using Raman spectroscopy supplemented by scanning electron microscopy (SEM) and X-ray diffraction (XRD) analyses. The SEM analysis of the defect stacking faults, inclusions of defects and their distribution has shown that they correlate with the peak positions of the obtained Raman spectra and with the XRD data on the crystal structure

Examination of Titanium Oxides, Lead Oxides and Lead Titanates Using X-Ray Diffraction and Raman Spectroscopy

1993 ◽  
Vol 310 ◽  
Author(s):  
Lynnette D. Madsen ◽  
Louise Weaver
Keyword(s):  
Thin Films ◽  
Raman Spectroscopy ◽  
Vapour Deposition ◽  
Mixed Oxides ◽  
Chemical Vapour ◽  
Titanium Oxides ◽  
X Ray Diffraction ◽  
X Ray ◽  
Lead Oxides ◽  
Metalorganic Chemical Vapour Deposition

AbstractSingle oxides (with titanium or lead) deposited as thin films by low pressure metalorganic chemical vapour deposition were investigated by x-ray diffraction and Raman spectroscopy. Examination of mixed oxides (titanates) and silicates were also carried out using these techniques. The crystallographic nature of these thin films were examined and comparisons made to their bulk counterparts. The deposition and anneal conditions 600 for producing cubic PbTiO3 films are discussed briefly.

scholarly journals On the Investigation of Microstructured Charcoal as an ANFO Blasting Enhancer

Energies ◽  
2020 ◽  
Vol 13 (18) ◽  
pp. 4681 ◽  
Author(s):  
Suzana Gotovac Atlagic ◽  
Andrzej Biessikirski ◽  
Łukasz Kuterasiński ◽  
Michał Dworzak ◽  
Michał Twardosz ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Ammonium Nitrate ◽  
Sem Analysis ◽  
Fuel Oil ◽  
Detonation Pressure ◽  
X Ray Diffraction ◽  
X Ray ◽  
Graphitic Structure ◽  
Detonation Temperature ◽  
Scanning Electron

In this study, we examined the influence of microstructured charcoal (MC) when added to ammonium nitrate fuel oil (ANFO) samples. We performed a study that investigated ANFOs structure, crystallinity, and morphology by utilizing infrared spectroscopy (IR), X-ray diffraction (XRD), and scanning electron microscopy (SEM), respectively. MC characteristics were probed by Raman spectroscopy and SEM analysis. SEM analysis indicated how fuel oil (FO) covered ammonium nitrate prill. Moreover, the surface of the MC was covered by specific microfibers and microtubes. The disordered graphitic structure of the MC was also confirmed by Raman spectroscopy. Simulation of blasting properties revealed that the addition of MC should decrease blasting parameters like heat explosion, detonation pressure, and detonation temperature. However, the obtained differences are negligible in comparison with the regular ANFO. All analyses indicated that MC was a good candidate as an additive to ANFO.

MOCVD of CuInE2 (Where E = S or Se) and Related Materials for Solar Cell Devices

1999 ◽  
Vol 606 ◽  
Author(s):  
Michael Kemmler ◽  
Michael Lazell ◽  
Paul O'brien ◽  
David J. Otwaya
Keyword(s):  
Thin Film ◽  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Vapour Deposition ◽  
Chemical Vapour ◽  
Organic Chemical ◽  
X Ray Diffraction ◽  
X Ray ◽  
Metal Organic ◽  
Scanning Electron

AbstractThin film(s) of chalcopyrite CuInE2(where E = S or Se) have been grown by low-pressure metal-organic chemical vapour deposition (LP-MOCVD) using the precursors [In(E2CNMenHexyl)3] and [Cu(E2CNMenHexyl)2]. Similarly, thin films of ME (where M = Zn, Cd; E = S, Se) have been deposited from precursors of general formula [M(E2CNMenHex)2]x. Films were grown on glass between 400 - 500 °C, and characterized by X-ray diffraction, optical spectroscopy (UV/Vis), EDAX and scanning electron microscopy.

Metalorganic Chemical Vapour Deposition of CuInSe2 From Copper and Indium Diselenocarbamates for Solar Cell Devices

1997 ◽  
Vol 485 ◽  
Author(s):  
John McAleese ◽  
Paul O'Brien ◽  
David J. Otway
Keyword(s):  
Chemical Vapour Deposition ◽  
Vapour Deposition ◽  
Chemical Vapour ◽  
Organic Chemical ◽  
X Ray Diffraction ◽  
X Ray ◽  
Metal Organic ◽  
Metalorganic Chemical Vapour Deposition ◽  
Metalorganic Chemical ◽  
Scanning Electron

AbstractThin film(s) of chalcopyrite CulnSe2 have been grown by low-pressure metal-organic chemical vapour deposition (LP-MOCVD) using the precursors In(Se2CNMenHexyl)3 and precursors Cu(Se2CNMenHexyl)2. The precursors were prepared from carbon diselenide. Films were grown on glass between 400 – 450 °C, and characterized by X-ray diffraction, optical spectroscopy (UV/Vis), EDAX and scanning electron microscopy.

1,3-Digermapropan und 1,3,5-Trigermacyclohexan / 1,3-Digermapropane and 1,3,5-Trigermacyclohexane

1988 ◽  
Vol 43 (6) ◽  
pp. 727-732 ◽  
Author(s):  
Hubert Schmidbaur ◽  
Johann Rott ◽  
Gabriele Reber ◽  
Gerhard Müller
Keyword(s):  
Crystal Structure ◽  
Mirror Symmetry ◽  
Spectroscopic Data ◽  
Vapour Deposition ◽  
Chemical Vapour ◽  
Chair Conformation ◽  
X Ray Diffraction ◽  
Orthorhombic Space Group ◽  
X Ray ◽  
Germanium Powder

AbstractFrom the copper-catalyzed reaction of germanium powder with dichloromethane at 350 °C a mixture of alkylchlorogermanes is obtained, in which CH3GeCl3, CH2(GeCl3)2 (1) and (Cl2GeCH2)3 (2) are the major products. Treatment of 1 and 2 with LiAlH4 in di-n-butyl or diethylether, resp., affords the hydrides CH2(GeH3)2 (3) and cyclic (H2GeCH2)3 (4), the latter along with the heterocycle H2Ge(CH2GeH2)2 (5). Compounds 3-5 have been identified by analytical and spectroscopic data, and the crystal structure of 4 has been determined by single crystal X-ray diffraction. The compound crystallizes in the orthorhombic space group Pmn21, with two molecules in the unit cell (a = 8.663(1), b = 7.783(1), c = 6.124(1) Å). The molecules, which are in a chair conformation, have crystallographic mirror symmetry with bond angles slightly larger than tetrahedral and Ge-C distances of 1.944(6), 1.953(3) and 1.955(4) Å. The compounds show potential as substrates for plasma-enhanced chemical vapour deposition (PE-CVD) of amorphous germanium carbon alloys (a-Ge, C:H).

X-ray powder diffraction data of LaNi0.5Ti0.45Co0.05O3, LaNi0.45Co0.05Ti0.5O3, and LaNi0.5Ti0.5O3 perovskites

2021 ◽  
pp. 1-6
Author(s):  
Mariana M. V. M. Souza ◽  
Alex Maza ◽  
Pablo V. Tuza
Keyword(s):  
Crystal Structure ◽  
Rietveld Method ◽  
Pechini Method ◽  
Powder Diffraction Data ◽  
X Ray Diffraction ◽  
Unit Cell Parameters ◽  
X Ray ◽  
Cell Parameters ◽  
Modified Pechini Method ◽  
Scanning Electron

In the present work, LaNi0.5Ti0.45Co0.05O3, LaNi0.45Co0.05Ti0.5O3, and LaNi0.5Ti0.5O3 perovskites were synthesized by the modified Pechini method. These materials were characterized using X-ray fluorescence, scanning electron microscopy, and powder X-ray diffraction coupled to the Rietveld method. The crystal structure of these materials is orthorhombic, with space group Pbnm (No 62). The unit-cell parameters are a = 5.535(5) Å, b = 5.527(3) Å, c = 7.819(7) Å, V = 239.2(3) Å3, for the LaNi0.5Ti0.45Co0.05O3, a = 5.538(6) Å, b = 5.528(4) Å, c = 7.825(10) Å, V = 239.5(4) Å3, for the LaNi0.45Co0.05Ti0.5O3, and a = 5.540(2) Å, b = 5.5334(15) Å, c = 7.834(3) Å, V = 240.2(1) Å3, for the LaNi0.5Ti0.5O3.

Synthesis and Photoluminescence Properties of Novel SnO2 Zigzag Nanoribbons

2010 ◽  
Vol 97-101 ◽  
pp. 4213-4216
Author(s):  
Jian Xiong Liu ◽  
Zheng Yu Wu ◽  
Guo Wen Meng ◽  
Zhao Lin Zhan
Keyword(s):  
Electron Microscopy ◽  
Room Temperature ◽  
Vapour Deposition ◽  
Chemical Vapour ◽  
Photoluminescence Properties ◽  
X Ray Diffraction ◽  
X Ray ◽  
Selected Area Electron Diffraction ◽  
Transmission Electron ◽  
Ceramic Boat

Novel single-crystalline SnO2 zigzag nanoribbons have been successfully synthesized by chemical vapour deposition. Sn powder in a ceramic boat covered with Si plates was heated at 1100°C in a flowing argon atmosphere to get deposits on a Si wafers. The main part of deposits is SnO2 zigzag nanoribbons. They were characterized by means of X-ray diffraction (XRD), field-emission scanning electron microscopy (FE-SEM), energy-dispersive X-ray spectroscopy (EDX), transmission electron microscopy (TEM) and selected-area electron diffraction (SAED). SEM observations reveal that the SnO2 zigzag nanoribbons are almost uniform, with lengths near to several hundred micrometers and have a good periodically tuned microstructure as the same zigzag angle and growth directions. Possible growth mechanism of these zigzag nanoribbons was discussed. A room temperature PL spectrum of the zigzag nanoribbons shows three peaks at 373nm, 421nm and 477nm.The novel zigzag microstructures will provide a new candidate for potential application.

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