Results 231 to 240 of about 16,319 (283)
Plasma resonance in TiO, VO and NbO
Journal of Solid State Chemistry, 1970 Reflectance spectra of TiO, VO, and NbO have been recorded. All these oxides show reflectance minima due to plasma edges. The energy corresponding to the reflectance minimum in TiO varies with stoichiometry (in the homogeneity range) and this phenomenon has been related to the transport properties of these oxides.
C.N.R. Rao, W.E. Wahnsiedler, J.M. Honig
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Properties of (Na, K)NbO 3 and (Li, Na, K)NbO 3 Ceramic Mixed Systems
Ferroelectrics, 2003In this paper, samples of (Na x K 1 m x )NbO 3 where x = 0.1 m 1 and Li y (Na 0.5 K 0.5 ) 1 m y NbO 3 where y = 0.01 m 0.05 have been prepared by conventional ceramic technique. The prepared Sodium Potassium Niobate (Na x K 1 m x NbO 3 ) and Lithium Sodium Potassium Niobate (Li y (Na 0.5 K 0.5 ) 1 m y NbO 3 ) samples are characterized using X-ray ...
Sheng-Yuan Chu
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Boranil and Related NBO Dyes: Insights From Theory
Journal of Chemical Theory and Computation, 2013 The simulations of excited-state properties, that is, the 0-0 energies and vibronic shapes, of a large panel of fluorophores presenting a NBO atomic sequence have been achieved with a Time-Dependent Density Functional Theory (TD-DFT) approach. We have combined eight hybrid exchange-correlation functionals (B3LYP, PBE0, M06, BMK, M06-2X, CAM-B3LYP ...
Chibani, Siwar +3 more
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Dalton transactions (Cambridge, England : 2003), 2018
Niobium oxotriazide, [NbO(N3)3], was prepared in a fluoride-azide exchange reaction between [NbOF3] and an excess of Me3SiN3 in SO2 solution. In acetonitrile solution, the fluoride-azide exchange resulted in the isolation of the adduct [NbO(N3)3·2CH3CN].
Ralf, Haiges +3 more
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Niobium oxotriazide, [NbO(N3)3], was prepared in a fluoride-azide exchange reaction between [NbOF3] and an excess of Me3SiN3 in SO2 solution. In acetonitrile solution, the fluoride-azide exchange resulted in the isolation of the adduct [NbO(N3)3·2CH3CN].
Ralf, Haiges +3 more
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Journal of Low Temperature Physics, 1990
Studies of the dHvA effect have been made on NbO single crystals grown by a zone melting techniques and 13 separate frequency branches ranging from 5.2×106 G to 1.2×108G have been observed. To understand the origin of the dHvA frequencies, we have made a self-consistent band structure calculation.
H. Aoki +5 more
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Studies of the dHvA effect have been made on NbO single crystals grown by a zone melting techniques and 13 separate frequency branches ranging from 5.2×106 G to 1.2×108G have been observed. To understand the origin of the dHvA frequencies, we have made a self-consistent band structure calculation.
H. Aoki +5 more
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Journal of Solid State Chemistry, 1970
The resistivity of NbOx (0.99 ⩽ x ⩽ 1.03) boules containing 3 to 5 grains is reported for the range 77–900°K. The material is an excellent conductor with a positive temperature coefficient of resistivity. The results are compared with some earlier work, which seems to require correction, and with unpublished work which is confirmed by this study.
G.V. Chandrashekhar, J. Moyo, J.M. Honig
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The resistivity of NbOx (0.99 ⩽ x ⩽ 1.03) boules containing 3 to 5 grains is reported for the range 77–900°K. The material is an excellent conductor with a positive temperature coefficient of resistivity. The results are compared with some earlier work, which seems to require correction, and with unpublished work which is confirmed by this study.
G.V. Chandrashekhar, J. Moyo, J.M. Honig
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Vacancy filling effect in thermoelectric NbO
Journal of Physics: Condensed Matter, 2015Using density functional theory, we have systematically explored the 1a and 1b vacancy filling in NbO (space group Pm-3m) with Nb and N, respectively, to design compounds with large Seebeck coefficients. The most dominating effect was identified for filling of 1b Wyckoff sites with N giving rise to a fivefold increase in the Seebeck coefficient.
Denis, Music +4 more
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The effect of vacancies on the electronic structure of Nbo
Journal of Physics and Chemistry of Solids, 1982Abstract The crystal structure of NbO is considered as a NaCl structure with 25% ordered vacancies in each sublattice. Self-consistent energy band structure calculations using the augmented plane wave (APW) method have been carried out for a hypothetical NbO with the full NaCl structure and for the structure with the vacancies.
E. Wimmer +4 more
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Tiling of a Nb(110) surface with NbO crystals nanosized by the NbO/Nb misfit
Physical Review B, 2002The overlayer covering a (110) face of a Nb crystal annealed at 1500--2000 K in UHV has been studied by Auger electron and photoemission spectroscopies, low-energy electron diffraction (LEED) and scanning tunneling microscopy (STM). This layer, which results from the surface segregation of oxygen dissolved in Nb bulk, corresponds to a thin niobium ...
I. Arfaoui, J. Cousty, H. Safa
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Electrical properties of NbO and NbO2
Journal of Physics and Chemistry of Solids, 1969Abstract The thermoelectric power and electrical conductivity were measured for NbO and NbO2 as functions of temperature at the limiting oxygen activities for the thermodynamic stability of each of the compounds. The electrical properties of NbO2 were essentially independent of oxygen pressure in the temperature range 50–1000°C, and the properties of
James A. Roberson, Robert A. Rapp
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