Effect of annealing and composition on crystal structure, surface morphology and optical absorption of chemically deposited Cd1-xSnxS films

2010 ◽  
Vol 45 (7) ◽  
pp. 725-731 ◽  
Author(s):  
R. Das ◽  
R. Kumar
Keyword(s):  
Crystal Structure ◽  
Optical Absorption ◽  
Surface Morphology ◽  
Structure Surface

scholarly journals Characterization of TiZrN and TaZrN Nanocomposite Multilayer Coating Deposited via RF/DC Magnetron Sputtering on AISI4140 Steel

2021 ◽  
Vol 2021 ◽  
pp. 1-10
Author(s):  
R. Hariharan ◽  
R. Raja ◽  
R. J. Golden Renjith Nimal ◽  
Mohamad Reda A. Refaai ◽  
S Ravi ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Surface Morphology ◽  
Magnetron Sputtering ◽  
Physical Vapor Deposition ◽  
Research Work ◽  
Multilayer Coating ◽  
Flow Rate Ratio ◽  
Dc Magnetron Sputtering ◽  
Average Roughness ◽  
Structure Surface

In this present research work, TiZrN and TaZrN multilayer coating was deposited on 4140 steel by RF/DC magnetron sputtering for comparative work also prepared in single layer. The flow rate ratio of Ar/N2 was set to 15 : 3 sccm and the thin film was prepared by the PVD (physical vapor deposition) method by RF/DC magnetron using a Ti-Zr and Ta-Zr target with a purity of 99.99%. The crystal structure, surface morphology microstructure, and component arrangements were explored by X-ray diffraction (XRD), scanning electron microscope (SEM), and atomic force microscopy (AFM). It has been found that the crystal structure, surface morphology, microstructure, and elemental composition of the membrane are strongly dependent on deposition parameters. It is mechanically characterized by corrosion and Vickers hardness. In AFM measurements, coarse cluster particles with increasing Ti and Ta values not only increase the average roughness (Ra) by 2.341 nm (200°C) and 2.951 nm (400°C) but also have a continuous average thickness which was shown to increase by 1.504 nm and 781.75 nm. With the increase of hardness, the roughness decreases correspondingly. The TiZrN multilayer microhardness augmented to 314 GPa at 200°C and 371 GPa for TaZrN (400°C).

Searching for the Influence of the Sapphire Nitridation Conditions on GaN Films Grown by Cyclic PLD

2002 ◽  
Vol 743 ◽  
Author(s):  
P. Sanguino ◽  
M. Niehus ◽  
S. Koynov ◽  
L. Melo ◽  
R. Schwarz ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Surface Morphology ◽  
Pulsed Laser ◽  
Nitrogen Plasma ◽  
Optical Quality ◽  
Laser Deposition ◽  
Deposition Technique ◽  
Sapphire Substrates ◽  
Structure Surface ◽  
Excitonic Luminescence

AbstractWe have deposited highly c-axis oriented GaN films on sapphire by the Cyclic Pulsed Laser Deposition Technique. Nitridation of the sapphire substrates for these samples was performed at 200 °C, 400 °C and 600 °C. For that purposed, we used a radio frequency nitrogen plasma during four hours. The films were compared in terms of crystal structure, surface morphology and optical quality. Although small, the biggest differences were detected in the surface morphology of the films. Additionally, a typical GaN sample nitridated at 200 °C was analysed by photoluminescence and showed the typical donor bound excitonic luminescence (D0X ) transition at 3.47 eV and a line near 3.42 eV. These lines show a FWHM of 20 meV and 30 meV at 13K, respectively.

scholarly journals Effect of Deposition Pressure on the Microstructure and Optical Band Gap of Molybdenum Disulfide Films Prepared by Magnetron Sputtering

Coatings ◽  
2019 ◽  
Vol 9 (9) ◽  
pp. 570 ◽  
Author(s):  
Gong ◽  
Xiao ◽  
Zhu ◽  
Wang ◽  
Ma
Keyword(s):  
Crystal Structure ◽  
Grain Size ◽  
Surface Morphology ◽  
Magnetron Sputtering ◽  
Band Gap ◽  
Optical Band Gap ◽  
Exciton Energy ◽  
Deposition Pressure ◽  
Electronegativity Difference ◽  
Structure Surface

MoS2 films were prepared via magnetron sputtering under different deposition pressures, and the effects of deposition pressure on the crystal structure, surface morphology, and optical properties of the resulting films were investigated. The results show that the crystallinity of the films first increases and then decreases with increasing pressure. The surface of the films prepared by magnetron sputtering is dense and uniform with few defects. The deposition pressure affects the grain size, surface morphology, and optical band gap of the films. The films deposited at a deposition pressure of 1 Pa revealed remarkable crystallinity, a 30.35 nm grain size, and a 1.67 eV optical band gap. Given the large electronegativity difference between MoS2 molecules and weak van der Waals forces between layers, the MoS2 films are prone to defects at different deposition pressures, causing the exciton energy near defects to decrease and the modulation of the surrounding band.

scholarly journals Study of the Structural, Morphological and Electrical Properties of WO3 Nanopowders which Use as Gas Sensors

2015 ◽  
Vol 60 ◽  
pp. 107-112
Author(s):  
Malek Ali ◽  
Mayada Hbous
Keyword(s):  
Crystal Structure ◽  
Electrical Properties ◽  
Surface Morphology ◽  
Gas Sensors ◽  
High Energy ◽  
X Ray Diffraction ◽  
Mill Time ◽  
Methanol Vapor ◽  
Structure Surface ◽  
Energy Ball

nanopowders of tungsten oxide (WO3) have been prepared by high energy ball-milling for various spans of mill time (1-18 h). The crystal structure, surface morphology of the prepared WO3 nanopowder were characterized by X-ray diffraction and scanning electron microscope. Thick films of WO3 nanopowders were prepared by printing painting chemical method to use them as gas sensors for methanol vapor at different operating temperatures, Their I-V characteristics were studied by using devices KEITHLEY 237. The effect of the milling time on the crystal structure, surface morphology, and electrical properties are reported.

scholarly journals Crystal Structure, Surface Topography, Surface Morphology and Optical Properties of DC Magnetron Sputtered VO2 Thin Films using VO2 Target

2018 ◽  
Vol 409 ◽  
pp. 012025
Author(s):  
Noormariah Muslim ◽  
Muhammad Nur Syafi’ie Md Idris ◽  
Ying Woan Soon ◽  
Yuan-Fong Chou Chau ◽  
Chee Ming Lim ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Thin Films ◽  
Optical Properties ◽  
Surface Morphology ◽  
Surface Topography ◽  
Structure Surface ◽  
Vo2 Thin Films

scholarly journals LPG Gas Sensing Performance of Nanostructured CdSnO3 Thin Films

2014 ◽  
Vol 42 ◽  
pp. 51-62
Author(s):  
R.H. Bari ◽  
S.B. Patil ◽  
R.T. Chaudhary
Keyword(s):  
Crystal Structure ◽  
Thin Films ◽  
Surface Morphology ◽  
Gas Sensing ◽  
Spray Pyrolysis Technique ◽  
Quick Response ◽  
Fast Recovery ◽  
Structure Surface ◽  
The Stability ◽  
Sensing Performance

Nanostructured CdSnO3 thin films were prepared by spray pyrolysis technique. The nanostructured CdSnO3 film showed selectivity for LPG gas over other conventional gases. The maximum LPG response of 1460 for the sample S2 at 350 °C was achieved. The quick response (TResponse = 5 s) and fast recovery (TRecovery = 11 s) are the main features of this film. Additionally, the stability of the prepared sensor has been studied. As prepared thin films were studied using XRD, FE-SEM, and EDAX to know crystal structure, surface morphology, and elemental composition, respectively. The results are discussed and interpreted.

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