Güncel Gönderiler: Fizik-Makale Koleksiyonu
Toplam kayıt 620, listelenen: 361-380
-
Momentum relaxation of electrons in n-type bulk GaN
(Ademic Press Ltd-Elsevier Science Ltd, 2003)We report on Hall mobility and carrier density measurements on n-type GaN epilayers grown on sapphire by MBE. The results are discussed using a theoretical model that takes into account the most important scattering ... -
Poly(methyl methacrylate) monolayers at the air-water interface
(Elsevier Science Bv, 2005)Several poly(methyl methacrylate) (PMMA) molecules with various chain numbers has been synthesised using Emulsifier-free emulsion polymerisation method. Langmuir-Blodgett thin film technique is an excellent method to ... -
Sol-gel derived nanocrystalline titania thin films on silicon
(Iop Publishing Ltd, 2005)Electrical characteristics of sol-gel derived titanium dioxide (TiO2) as insulating layers were investigated by making capacitance and leakage current measurements in metal-insulator-semiconductor configurations. The ... -
Spun thin films of poly(methyl methacrylate) polymer for benzene sensing
(Iop Publishing Ltd, 2005)Thin films of poly(methyl methacrylate) (PMMA) were deposited on suitably prepared substrates by spinning the spreading solution in chloroform at 3000 rpm for atomic force microscopy and surface plasmon resonance studies. ... -
Characterization of a novel 1,3-bis(p-iminobenzoic acid)indane Langmuir-Blodgett film for organic vapor sensing
(Amer Scientific Publishers, 2005)In the present paper we report about the Langmuir-Blodgett thin film characterization and organic vapor sensing properties of a novel 1,3-bis(p-iminobenzoic acid)indane (IBI) containing polar carboxylic acid groups. LB ... -
Uniaxial in-plane magnetic anisotropy in silicon-iron films prepared using vacuum coating plant (VCP)
(E D P Sciences, 2005)The novel VCP system is a mobile physical deposition method to deposit metallic/magnetic films using various source materials including powder, lump, pre-alloyed ingots and wires. The VCP system consists of a large deposition ... -
Pyroelectric figure of merit for a calix [4] acid/amine alternate layer Langmuir-Blodgett film
(Elsevier Science Bv, 2005)In this work calix [4] acid (A) has been deposited alternately with calix [4] amine (B) using the LB film deposition technique to form a non-centrosymmetric ABABA... molecular architecture. Pyroelectric and dielectric ... -
Phenomenological issues in supersymmetry with nonholomorphic soft breaking
(Amer Physical Soc, 2005)We present a through discussion of motivations for and phenomenological issues in supersymmetric models with minimal matter content and nonholomorphic soft-breaking terms. Using the unification of the gauge couplings and ... -
DFT study of Rb/Si(100)-2 x 1 system
(Elsevier Science Bv, 2005)We have investigated Rb adsorption on the Si(100) surface for 0.5 and 1 monolayer coverages using the total energy method with norm-conserving pseudopotentials. For 2 x 1 reconstruction at 1 ML coverage symmetrized dimers ... -
Molecular alignment during gel formation from methyl methacrylate: An excimer fluorescence study
(Taylor & Francis Ltd, 2005)Glass transition during bulk polymerization was studied in free-radical cross-linking copolymerization (FCC) of methyl methacrylate (MMA) using the steady-state fluorescence (SSF) technique. Naphthalene (N) was used as a ... -
Microstructural and electrical studies on diamond films
(Pergamon-Elsevier Science Ltd, 2005)X-ray diffraction, atomic force microscopy and electrical studies were performed on 2-3 mu m thick diamond films on silicon substrates. The films were produced by the microwave plasma chemical vapour deposition method. The ... -
Poly(methyl methacrylate) films for organic vapour sensing
(Iop Publishing Ltd, 2003)Optical constants and fabrication parameters are investigated using surface plasmon resonance (SPR) studies on spun films of poly(methyl methacrylate) (PMMA) derivatives in contact with two different dielectric media. A ... -
4H-SiC photoconductive switching devices for use in high-power applications
(Amer Inst Physics, 2003)Silicon carbide is a wide-band-gap semiconductor suitable for high-power high-voltage devices and it has excellent properties for use in photoconductive semiconductor switches (PCSSs). PCSS were fabricated as planar ... -
p-GaN-i-GaN/AlGaN multiple-quantum well n-AlGaN back-illuminated ultraviolet detectors
(Minerals Metals Materials So, 2003)The spectral response of back-surface-illuminated p-GaN-i-GaN/AlGaN multiple-quantum well (MQW)-n-AlGaN ultraviolet (UV) photodetector is reported. The structure was grown by molecular-beam epitaxy on a c-plane sapphire ... -
Relation between magnetic, spectroscopic and structural properties of binuclear copper(II) complexes of pentadentate Schiff-base ligand, semi-empirical and ab-initio calculations
(Verlag Z Naturforsch, 2003)The synthesis and characterization of [Cu-2(L-1)(3,5 prz)] (L-1=1,3-Bis(2-hydroxy-3,5-chlorosalicylideneamino)propan-2-ol) 1 and of [Cu-2(L-2)(3,5 prz)] (L-2=1 3-Bis(2-hydroxy-bromosalicylideneamino)propan-2-ol) 2 are ... -
Photo-induced transient spectroscopy and in-plane photovoltage in GaInNAs/GaAs quantum wells
(Elsevier Science Bv, 2003)We have studied the optical quality of sequentially grown undoped Ga0.8In0.2As and Ga0.8In0.2N0.015As0.985 quantum wells (QWs). Spectral and time-resolved in-plane photovoltage (IPV) and photo-induced transient spectroscopy ... -
Effect of non-drifting hot phonons on high-field drift velocity in GaN/AlGaN
(Iop Publishing Ltd, 2003)We report on the studies of steady-state high-field drift velocity in GaN/AlGaN HEMT structures. The results are compared with a model taking into account the effect of hot phonon production on the high-field transport of ... -
In-plane photovoltage and photoluminescence studies in sequentially grown GaInNAs and GaInAs quantum wells
(Amer Inst Physics, 2003)We have investigated in-plane photovoltage (IPV) and photoluminescence (PL) in sequentially grown Ga0.8In0.2As/GaAs and Ga0.8In0.2N0.015As0.985/GaAs-quantum wells. Temperature, excitation intensity, spectral and time ... -
Magnetic characterization of silicon-iron magnetic material produced by a novel rotating cryostat
(Elsevier Science Bv, 2003)A rotating cryostat vacuum system has been used to deposit Si3Fe97 magnetic films. Observations indicate that in-plane magnetic anisotropy and coercivity is dependent on the type of substrate and the deposition method used. ... -
Relation between ferromagnetic layer thickness (NiCu) and properties of NiCu/Cu multilayers
(Springer, 2015)NiCu/Cu multilayers were grown on (110) textured polycrystalline Cu substrates from a single electrolyte containing Ni and Cu ions by electrodeposition. The structural, magnetic and magnetoresistance properties of the ...
