Enhancing resistive-type hydrogen gas sensing properties of cadmium oxide thin films by copper doping

2018 ◽  
Vol 42 (2) ◽  
pp. 1457-1466 ◽  
Author(s):  
K. Sankarasubramanian ◽  
P. Soundarrajan ◽  
T. Logu ◽  
K. Sethuraman ◽  
K. Ramamurthi
Keyword(s):  
Thin Films ◽  
Gas Sensing ◽  
Spray Pyrolysis Technique ◽  
Cadmium Oxide ◽  
Hydrogen Gas ◽  
Chemical Spray Pyrolysis ◽  
Glass Substrates ◽  
Gas Sensing Properties ◽  
Amorphous Glass ◽  
Cdo Thin Films

The pure and Cu-doped CdO thin films with various doping concentrations (0.5 to 2 wt%) were deposited on amorphous glass substrates by a chemical spray pyrolysis technique for hydrogen gas sensor application.

Hydrogen gas sensing properties of WO3 sputter-deposited thin films enhanced by on-top deposited CuO nanoclusters

2018 ◽  
Vol 43 (50) ◽  
pp. 22756-22764 ◽  
Author(s):  
Stanislav Haviar ◽  
Jiří Čapek ◽  
Šárka Batková ◽  
Nirmal Kumar ◽  
Filip Dvořák ◽  
...  
Keyword(s):  
Thin Films ◽  
Gas Sensing ◽  
Hydrogen Gas ◽  
Sensing Properties ◽  
Gas Sensing Properties ◽  
Sputter Deposited

Hydrogen gas sensing properties of PdO thin films with nano-sized cracks

2010 ◽  
Vol 21 (16) ◽  
pp. 165503 ◽  
Author(s):  
Young Tack Lee ◽  
Jun Min Lee ◽  
Yeon Ju Kim ◽  
Jin Hyoun Joe ◽  
Wooyoung Lee
Keyword(s):  
Thin Films ◽  
Gas Sensing ◽  
Hydrogen Gas ◽  
Sensing Properties ◽  
Gas Sensing Properties

Hydrogen gas sensors based on nanocrystalline TiO2 thin films

Open Physics ◽  
2011 ◽  
Vol 9 (5) ◽  
Author(s):  
Azhar Haidry ◽  
Peter Schlosser ◽  
Pavol Durina ◽  
Marian Mikula ◽  
Milan Tomasek ◽  
...  
Keyword(s):  
Thin Films ◽  
Annealing Temperature ◽  
Gas Sensing ◽  
Hydrogen Gas ◽  
Tio2 Thin Films ◽  
Nanocrystalline Tio2 ◽  
Sensing Properties ◽  
Gas Sensing Properties ◽  
Hydrogen Gas Sensors ◽  
Titanium Dioxide Thin Films

AbstractTitanium dioxide thin films are extensively studied for applications in solid state gas sensor devices. Their gas sensing properties are strongly dependent on deposition technique, annealing temperature, film thickness and consequent properties like crystalline structure, grain size or amount of defects and impurities. In this work we report the gas sensing properties of TiO2 thin films prepared by reactive magnetron sputtering technique and subsequently annealed at temperatures 600°C and 900°C. The films were exposed to different concentrations of H2 gas up to 10 000 ppm. Their sensitivity to gas at various operating temperatures, ranging from 250°C to 450°C, was obtained by measuring their resistance.

scholarly journals EFFECT OF THICKNESS ON THE STRUCTURE AND OPTICAL PROPERTIES OF LASER-INDUCED PLASMA CDO THIN FILMS

2021 ◽  
Vol 03 (03) ◽  
pp. 41-50
Author(s):  
Hiyam Ch. MAJED
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Energy Gap ◽  
Plasma Deposition ◽  
Cadmium Oxide ◽  
Laser Wavelength ◽  
Dielectric Constants ◽  
Laser Induced Plasma ◽  
Glass Substrates ◽  
Cdo Thin Films

Thin films of cadmium oxide (CdO) deposited on glass substrates using Nd-YAG laser wavelength (alpha= 532 nm) and period time (10ns) via laser-induced plasma deposition technique (PLD). The structural properties of these films have been described as a change in thickness (200 , 400 ,and 1000) nm) at substrate temperature of (400 ° C) and energy flounce of (0.4 J / cm2). The X-ray diffraction results show that he mean size of crystallite measured using Scherer formula to adjust the thickness of 200 nm, 400 nm and 1000 nm of CdO thin films is 47 nm, 64 nm and 78 nm respectively .Also the optical properties which included transmittance, absorbance , energy gap and optical constant such as the Refractive index, extinction coefficient real and imaginary parts of dielectric constants were determined .

scholarly journals The Influence of Temperature on the Formation of Cubic Structured CdO Nanoparticles and Their Thin Films from Bis(2-hydroxy-1-naphthaldehydato)cadmium(II) Complex via Thermal Decomposition Technique

2017 ◽  
Vol 2017 ◽  
pp. 1-11 ◽  
Author(s):  
Thokozani Xaba ◽  
Makwena J. Moloto ◽  
Mohammad A. Malik ◽  
Nosipho Moloto
Keyword(s):  
Electron Microscopy ◽  
Thin Films ◽  
Thermal Decomposition ◽  
Metal Oxide Nanoparticles ◽  
Cadmium Oxide ◽  
Oxide Nanoparticles ◽  
Glass Substrates ◽  
Vis Spectroscopy ◽  
Cdo Nanoparticles ◽  
Cdo Thin Films

Recently, researchers have developed a great interest in the synthesis of metal oxide nanoparticles due to their potential applications in various fields of science and industry, especially in catalysis, due to their high activity. Bis(2-hydroxy-1-naphthaldehydato)cadmium(II) complexes were prepared and used as precursors for the synthesis of cadmium oxide nanoparticles via thermal decomposition method using HDA as a stabilizing agent. The prepared complexes were also used as single source precursors to prepare CdO thin films onto the glass substrates by spin coating and were annealed at 250, 300, and 350°C, respectively. The precursors were characterized by Fourier transform infrared (FTIR) spectroscopy, elemental analysis, nuclear magnetic resonance (NMR), and thermogravimetric analysis (TGA). The synthesized CdO nanoparticles and CdO thin films were characterized by ultraviolet-visible (UV-vis) spectroscopy, photoluminescence (PL), X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), and atomic force microscopy (AFM).

scholarly journals Ethanol and Hydrogen Gas-Sensing Properties of CuO–CuFe2O4 Nanostructured Thin Films

2018 ◽  
Vol 18 (17) ◽  
pp. 6937-6945 ◽  
Author(s):  
Saptarshi De ◽  
Narayanan Venkataramani ◽  
Shiva Prasad ◽  
Rajiv Onkar Dusane ◽  
Lionel Presmanes ◽  
...  
Keyword(s):  
Thin Films ◽  
Gas Sensing ◽  
Hydrogen Gas ◽  
Sensing Properties ◽  
Nanostructured Thin Films ◽  
Gas Sensing Properties

Highly transparent conducting cerium incorporated CdO thin films deposited by a spray pyrolytic technique

RSC Advances ◽  
2015 ◽  
Vol 5 (124) ◽  
pp. 102741-102749 ◽  
Author(s):  
P. Velusamy ◽  
R. Ramesh Babu ◽  
K. Ramamurthi ◽  
M. S. Dahlem ◽  
E. Elangovan
Keyword(s):  
Thin Films ◽  
Spray Pyrolysis ◽  
Spray Pyrolysis Technique ◽  
Cadmium Oxide ◽  
Low Level ◽  
Transparent Conducting ◽  
Cdo Thin Films

In the present work, a spray pyrolysis technique was employed to deposit cerium (Ce) doped cadmium oxide (CdO) thin films with low level doping concentrations (0.25, 0.50, 0.75 and 1.0 wt%).

scholarly journals Nanostructured CdO Thin Films for LPG and CO2 Gas Sensor Prepared by Spray Pyrolisis Technique

2014 ◽  
Vol 37 ◽  
pp. 31-46 ◽  
Author(s):  
R.H. Bari ◽  
S.B. Patil
Keyword(s):  
Thin Films ◽  
Deposition Time ◽  
Gas Sensing ◽  
Spray Deposition ◽  
Cadmium Acetate ◽  
Xrd Analysis ◽  
Glass Substrates ◽  
Response And Recovery ◽  
Cdo Thin Films ◽  
Gas Response

Nanostructured CdO thin films were deposited by spray pyrolysis techniques at different spray deposition time on glass substrates. Nanostructured CdO thin films was prepared using 0.05 M of cadmium acetate dehydrate (CH3COO) 2Cd·2H2O) was dissolved in the deionised water. These thin films were annealing in air at temperatures 500 °C for 60 min. The thickness of the films, crystallite and grain size were observed to increase with the increase in spray deposition time. As prepared thin films were characterized using XRD, FE-SEM and EDAX. The XRD analysis shows that CdO films were cubic structured. The electrical and gas sensing properties of these films were investigated. Prepared nanostructure CdO thin films show LPG (S = 1600) and CO2 (S = 435) gas response at different operating temperature. Gas response, selectivity, response and recovery time of the sensor were measured and presented.

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