Browsing Yayın Koleksiyonu by Issue Date
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Free surface effect on displacement and relative interfacial displacement fields of misfit dislocations at the bicrystal interface
(2007)The displacement field u› and the relative interfacial displacement field ?u› are investigated for the material formed by two isotropic media. When one of the media tends to infinity and the other one has the thickness of ... -
The effect of strain relaxation on electron transport in undoped Al0.25Ga0.75N/GaN heterostructures
(ELSEVIER SCIENCE BV, 2007)The two-dimensional electron gas (2DEG) transport properties of two-step growth undoped Al0.25Ga0.75N/GaN heterostructures with semi-insulating buffer, grown by MOCVD, were investigated in a temperature range of 20-350K. ... -
Optimization of alloy composition, interlayer and barrier thicknesses in AlxGa1-xN/(AlN)/GaN high electron mobility transistors
(NATL INST OPTOELECTRONICS, 2007)The investigating of the GaN-based high electron mobility transistors (HEMTs) is focused to achieve two goals: increase of carrier density and mobility. Increasing the number of the carriers in the 2-dimensional-electron-gas ... -
Electron transport in Ga-rich InxGa1-xN alloys
(IOP PUBLISHING LTD, 2007)Resistivity and Hall effect measurements on n-type undoped Ga-rich InxGa1-xN (0.06 <= x <= 0.135) alloys grown by metal-organic vapour phase epitaxy (MOVPE) technique are carried out as a function of temperature (15-350K). ... -
Temperature-dependent electron transport in In0.5Ga0.5P/GaAs grown by MOVPE
(IOP PUBLISHING LTD, 2007)Hall effect measurements in undoped In0.5Ga0.5P/GaAs alloy grown by metal organic vapour-phase epitaxy (MOVPE) have been carried out in the temperature range 15-350 K. The experimental results are analysed using a two-band ... -
High temperature variable-range hopping conductivity in undoped TiO2 thin film
(NATL INST OPTOELECTRONICS, 2007)Electrical conductivity measurements in an undoped titanium dioxide thin film have been carried out as a function of temperature (180-320 K). The film has been deposited onto glass substrates by a d.c. magnetron-sputtering ... -
Free Surface Effect On Displacement And Relative Interfacial Displacement Fields Of Misfit Dislocations At The Bicrystal Interface
(SPRINGER INDIA, 2007)The displacement field (u) over right arrow and the relative interfacial displacement field (Delta u) over right arrow are investigated for the material formed by two isotropic media. When one of the media tends to infinity ... -
Molecular structure and vibrational spectra of 1,3-bis(4-pyridyl)propane by quantum chemical calculations
(PERGAMON-ELSEVIER SCIENCE LTD, 2008)The experimental and theoretical study on the structures and vibrations of 1,3-bis(4-pyridyl)propane are presented. The FFAR and Raman spectra of molecule have been measured. The optimized geometric bond lengths have been ... -
Molecular structure and vibrational spectra of 2-amino-5-methyl pyridine and 2-amino-6-methyl pyridine by density functional methods
(ELSEVIER SCIENCE BV, 2008)The Fourier transform Raman (3500-50 cm(-1)) and Fourier transform infrared (4000-400 cm(-1)) spectra of 2-amino-5-methylpyridine and 2-amino-6-methylpyridine have been measured in solid phase. The Fourier transform gas ... -
Experimental (FT-IR and FT-Raman spectra) and theoretical (ab initio HF, DFT) study of 2-chloro-5-methylaniline
(ELSEVIER SCIENCE BV, 2008)In this work, the experimental and theoretical vibrational spectra of 2-chloro-5-methylaniline (2C15MA, C7H8NCl) were studied. FF-IR and FT-Raman spectra of 2Cl5MA in the liquid phase were recorded in the region 4000-400 ... -
FT-IR, FT-Raman, NMR spectra, and molecular structure investigation of 2,3-dibromo-N-methylmaleimide: A combined experimental and theoretical study
(ELSEVIER SCIENCE BV, 2008)In the present work, the experimental and theoretical vibrational spectra and chemical shifts of 2,3-dibromo-N-methylmaleimide (2,3DBrNMM, C(5)H(3)NO(2)Br(2)) were studied. FT-IR and FT-Raman spectra of 2,3DBrNMM in the ... -
Comparison of experimental and density functional study on the molecular structure, infrared and Raman spectra and vibrational assignments of 6-chloronicotinic acid
(PERGAMON-ELSEVIER SCIENCE LTD, 2008)The experimental and theoretical study on the structures and vibrations of 6-chloronicotinic acid (6-CNA, C(6)H(4)ClNO(2)) are presented. The Fourier transform infrared spectra (4000-50cm(-1)) and the Fourier transform ... -
Electrical properties of TiO(2) thin films
(ELSEVIER SCIENCE BV, 2008)The electrical properties of n-type titanium dioxide thin films deposited by magnetron-sputtering method have been investigated by temperature-dependent conductivity. We observed that the temperature dependence of the ... -
Pressure-induced phase transformation in CdO: An ab initio constant-pressure study
(EDP SCIENCES S A, 2008)A constant-pressure ab initio technique is used to study the behavior of CdO at high pressures. A phase transformation from the NaCl-type structure to the CsCl-type structure via a rhombohedral intermediate state is ... -
An ab initio constant-pressure study of pressure-induced phase transition of MgSe
(EDP SCIENCES S A, 2008)We study the pressure-induced phase transition of MgSe using a constant-pressure ab initio technique and. find that the rocksalt-structured MgSe transforms into a FeSi-type structure. Furthermore, we. find that this phase ... -
X-ray, FT-Raman, FT-IR spectra and ab initio HF, DFT calculations of 2-[(5-methylisoxazol-3-yl)amino]-2-oxo-ethyl methacrylate
(ELSEVIER SCIENCE BV, 2008)Molecular structure of methacrylate monomer, 2-[(5-methylisoxazol-3-yl)amino]-2-oxo-ethyl methacrylate (IAOEMA) was determined by X-ray diffraction analysis. The molecule (IAOEMA) crystallizes in monoclinic, space group ... -
Molecular structure and vibrational spectra of 1,3-bis(4-piperidyl)propane by quantum chemical calculations
(ELSEVIER SCIENCE BV, 2008)The infrared and Raman spectra of 1,3-bis(4-piperidyl)propane molecule have been recorded between 4000-400 cm(-1) region and 3500-150 cm(-1) region, respectively. The vibrational frequencies of the molecule are investigated. ... -
An experimental and theoretical study of molecular structure and vibrational spectra of pentafluorophenylboronic acid molecule by density functional theory and ab initio Hartree Fock calculations
(ELSEVIER SCIENCE BV, 2008)In this work, the Fourier transform Raman and Fourier transform infrared spectra of pentafluorophenylboronic acid (= pfpa) were recorded in the solid phase. The structural and spectroscopic analysis of the pentafluorophenylboronic ... -
An experimental and theoretical study of molecular structure and vibrational spectra of 2-chloronicotinic acid by density functional theory and ab initio Hartree-Fock calculations
(ELSEVIER SCIENCE BV, 2008)In this work, the Fourier transform Raman and Fourier transform infrared spectra of 2-chloronicotinic acid (2-CNA) are recorded in the solid phase. The molecular geometry, vibrational frequencies, infrared intensities and ...
