Journal ArticleDOI
The Influence of In/Cu Ratio on Electrical Properties of CuO:In Thin Films Prepared by Plasma-Enhanced CVD
TLDR
In this paper, thin thin films were prepared by plasma-enhanced chemical vapor deposition (CVD) with Cu(acac)2 and Inacac3 precursors, and a dependence of the resistivity of the films on the indium concentration was found.Abstract:
CuO:In thin films were prepared by plasma-enhanced chemical vapor deposition (CVD) with Cu(acac)2 and In(acac)3 precursors. A unique method or facility in vaporizing solid-state precursors and the transportation to the CVD reactor was described. The structure of the films evolved from nano-crystalline characteristic to amorphous state as the In/Cu atomic ratio of the mixed precursors increased from 0 to 0.25. A dependence of the resistivity of the films on the indium concentration was found. A low room-temperature resistivity of 7.35 Ω·cm was achieved for the sample of an In/Cu atomic ratio of 0.08, with an activation energy of 0.14 eV. X-ray photoelectron spectroscopy (XPS) study excluded the possibility that the increased conductivity of the samples came from a reduction of Cu2+ to Cu+. Positive holes (h•) induced by negatively charged defect complex were assumed to contribute to the increase of conductivity.read more
Citations
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Journal ArticleDOI
Synthesis of Sn doped CuO nanotubes from core-shell Cu/SnO(2) nanowires by the Kirkendall effect.
TL;DR: Doped metal oxide nanotubes can be readily synthesized by thermal oxidization of core-shell nanowires in air where the dopant content can be tuned by controlling the shell thickness through adjusting the deposition time.
Journal ArticleDOI
Microwave-assisted synthesis and electrochemical properties of urchin-like CuO micro-crystals
TL;DR: In this article, a facile microwave-assisted synthetic route has been successfully developed to prepare urchin-like CuO micro-crystals, and the morphology and size of final products strongly depended on microwave power and reaction time.
Journal ArticleDOI
Third-order nonlinear optical properties of chemically synthesized copper oxide nanosheets
Mahdi Shahmiri,Nor Azowa Ibrahim,Nastaran Faraji,Wan Mahmood Mat Yunus,Nilofar Asim,Norhazlin Zainuddin +5 more
TL;DR: In this paper, a quick-precipitation method using Cu(NO 3 ) 2 and NaOH in the presence of polyvinylpyrrolidone (PVP) was used to obtain different sizes of CuO nanosheets by varying the PVP concentration.
Effect of pH on the Synthesis of CuO Nanosheets by Quick Precipitation Method
Mahdi Shahmiri,Nor Azowa Ibrahim,Norhazlin Zainuddin,Nilofar Asim,B. Bakhtyar,Azami Zaharim,Kamaruzzaman Sopian +6 more
TL;DR: In this paper, copper oxide nanosheets were successfully fabricated in polyvinylpyrrolidone (PVP) via a quick precipitation method, and the effect of pH on the final product was investigated.
Journal ArticleDOI
P4vpy–cuo nanoparticles as a novel and reusable catalyst: application at the protection of alcohols, phenols and amines
TL;DR: P4VPy-CuO nanoparticles were synthesized using ultrasound irradiations as mentioned in this paper, and the properties of the synthesized nanoparticles are investigated by X-ray diffraction, scanning electron microscopy, transmission electron microscope and Fourier transform infrared spectroscopy.
References
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Journal ArticleDOI
Electronic structure of Cu2O and CuO
Jacques Ghijsen,Liu Hao Tjeng,J. van Elp,Henk Eskes,J. Westerink,George A. Sawatzky,M. T. Czyzyk +6 more
TL;DR: In this article, the electronic structure of copper oxides has been investigated by photoelectron (x-ray photoemission, ultraviolet photo-emission), Auger electron, and bremsstrahlung isochromat spectroscopies.
Book
Electron spectroscopy : theory, techniques, and applications
C. R. Brundle,Arthur D. Baker +1 more
Journal ArticleDOI
Correlation of Relative X-ray Photoelectron Spectroscopy Shake-up Intensity with CuO Particle Size
TL;DR: X-ray photoelectron spectroscopy (XPS) analysis of four Cu/SiO{sub 2} catalyst systems of different particle sizes of CuO on the surface showed variation in the relative peak area intensities of the shake-up lines to main core levels of the Cu 2p orbitals.
Journal ArticleDOI
Room temperature growth of CuO nanorod arrays on copper and their application as a cathode in dye-sensitized solar cells
TL;DR: In this paper, a vertical aligned CuO nanorod arrays on copper electrodes with diameters of ∼5nm and lengths of hundreds of nanometers were synthesized successfully using a simple wet chemical method at room temperature.
Journal ArticleDOI
Novel oxide amorphous semiconductors: transparent conducting amorphous oxides
TL;DR: In this article, a working hypothesis to find wide gap oxide semiconductors was proposed on the basis of simple considerations, which predicts that amorphous double oxides composed of heavy metal cations (HMCs) with an electronic configuration (n − 1)d10s0 are promising candidates for a novel class of ammorphous semiconductor.
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