Journal ArticleDOI
Electrical properties of compacted assembly of copper oxide nanoparticles
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In this paper, both dc and ac electrical properties were measured on a compacted nanoparticle assembly and the dc electrical resistivity in the temperature range 140-300K was found to arise due to a variable range hopping conduction mechanism.Abstract:
Cu2O nanoparticles with diameters in the range 6.0-8.6nm were prepared by a chemical method. Both dc and ac electrical properties were measured on a compacted nanoparticle assembly. dc electrical resistivity in the temperature range 140-300K was found to arise due to a variable range hopping conduction mechanism. The ac resistivity variation as a function of frequency (in the range 10kHzto3MHz) and temperature (range 220–320K) was explained on the basis of the power-law exponent in percolating clusters. The interfacial amorphous phase of the nanoparticle assembly appears to control the electrical behavior of the system.read more
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Nitrogen Doping Effect in Cu 4 O 3 Thin Films Fabricated by Radio Frequency Magnetron Sputtering
Abdul Majed Patwary,Katsuhiko Saito,Qixin Guo,Tooru Tanaka,Kin Man Yu,Kin Man Yu,Wladek Walukiewicz,Wladek Walukiewicz +7 more
Journal ArticleDOI
Dielectric properties of Permalloy granular composite materials
TL;DR: In this article, the electrical properties of Permalloy granular composite materials have been studied considering the application to left-handed meta-materials, and the electrical permittivity spectra have been shown to have non-metallic properties.
Journal ArticleDOI
Anomalous electrical properties of poly vinyl alcohol films with Tb3+ ions and copper nanoparticles in different solvents
TL;DR: In this paper, a laser ablation was used to fabricate copper nanoparticles (NPs) in different solvents from sodium lauryl sulphate, acetone and ethanol by applying 1064 nm radiation from a Nd:YAG laser.
Journal ArticleDOI
Electronic structure of NiO layers grown on Al2O3 and SiO2 using metallo-organic chemical vapour deposition
Hsing-Yi Chou,M. Badylevich,Valeri Afanas'ev,Michel Houssa,Andre Stesmans,Johan Meersschaut,Ludovic Goux,Jorge A. Kittl,Dirk Wouters +8 more
TL;DR: In this article, electron states in nanometer-thin NiO layers grown by metallo-organic chemical vapor deposition on SiO2 or Al2O3 by means of spectroscopic ellipsometry and internal photoemission measurements points to the presence of a metal-like electron density, in correlation with the enhanced electrical conductivity of the films.
Journal ArticleDOI
Localization and transfer of charge carriers in CuO nanopowder by impedance spectroscopy
A. A. Lepeshev,A. A. Lepeshev,N. A. Drokin,A. V. Ushakov,A. V. Ushakov,I. V. Karpov,I. V. Karpov,L. Yu. Fedorov,L. Yu. Fedorov,E. P. Bachurina,E. P. Bachurina +10 more
TL;DR: In this paper, the electro-physical characteristics of CuO nanopowder were investigated by impedance spectroscopy using a sensor based on interdigitated structure in the frequency range from 1 to 100 MHz.
References
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Journal ArticleDOI
A.c. conduction in amorphous chalcogenide and pnictide semiconductors
TL;DR: In this article, a comprehensive survey is given of the experimental a.c. data for two types of amorphous semiconductor, namely chalcogenide and pnictide materials, and it is concluded that the behavior at intermediate to high temperatures is well accounted for by the correlated-barrier-hopping model, whereas the low-temperature behaviour is probably due to atomic tunnelling.
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TL;DR: In this article, the Hartree-Fock Approximation of many-body techniques and the Electron Gas Polarons and Electron-phonon Interaction are discussed.
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Critical Behaviour of Conductivity and Dielectric Constant near the Metal-Non-Metal Transition Threshold
TL;DR: In this article, the metal-non-metal transition takes place when the volume fraction of the metallic phase approaches the percolation threshold, and it is shown that the static dielectric constant diverges near the threshold.
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Nanocrystalline materials an approach to a novel solid structure with gas-like disorder?
TL;DR: In this paper, randomly oriented "nanocrystal" with sizes d below 10 nm, were compacted into a nanocrystalline solid, which consists of crystalline domains and a connective matrix without any short or long range order.