Materials Literature
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Nanocrystalline PLZT thin films of composition Pb1-xLaxZr0.52Ti0.48 (x = 0, 2, 5%) were deposited on silicon substrates by sol-gel process using lead acetate trihydrate, lanthanum nitrate hydrate, zirconium propoxide and titanium propoxide as lead, lanthanum, zirconium and titanium precursor materials. Experimental st…
Self-assembled InAs quantum dots (QDs) were grown on vicinal (100) GaAs substrate. Effect of InAs coverage and growth temperature was studied to optimize QDs for laser applications. The density and size distribution of QDs varied with the change in InAs coverage and growth temperature. Growth temperature was varied fr…
Modern development of optical devices calls for new nonlinear optical (NLO) materials with extraordinary properties. Organic and semi-organic materials are getting considerable attention because of their potential uses in various optical telecommunication devices including optical modulation, optical switching and opt…
Ceramics with compositional formula Ba0.80Pb0.20Ti1-xZrxO3; x = 0.00, 0.02, 0.04, 0.06, 0.08 and 0.10 were synthesized by conventional solid state reaction method. The single phase with perovskite structure was confirmed by X-ray diffraction analysis for all the samples. The tetragonality was found to decrease with in…
Síntese e caracterização de elemento sensor de matriz KalSi3O8.dopadas com Mn ou Gd, obtidos pela técnica sol-gel, visando a aplicação em dosimetria das radiações ionizantes por termoluminescência e luminescência opticamente estimula / E.L.
In the title complex, [Ni(C(13)H(9)N(2)O(3))(2)(H(2)O)(2)]·2H(2)O, the Ni(II) atom, located on a twofold rotation axis, is in a distorted octa-hedral geometry, defined by four N atoms from two 2-hy-droxy-5-[(pyridin-2-yl)methyl-idene-amino]-benzoate ligands and two O atoms from two water mol-ecules. In the crystal, in…
Η ηλεκτρική απόκριση ελαστομερικών συστημάτων HNBR, FKM και μειγμάτων αυτών, καθώς και νανοσύνθετων μειγμάτων HNBR/FKM ενισχυμένων με νανοσωλήνες άνθρακα πολλαπλού τοιχίου είναι το αντικείμενο της παρούσης εργασίας. Η ηλεκτρική απόκριση προσδιορίζεται με την μέθοδο της διηλεκτρικής φασματοσκοπίας ευρέως φάσματος.
The title compound, C(8)H(12)Br(2)O(4), lies about a crystallographic center of inversion at the midpoint of the central C-C bond. The latter is also repsonsible for the observation of the meso form. There are no intra-molecular hydrogen bonds, but mol-ecules are connected by inter-molecular C-H⋯O inter-actions, formi…
The complete mol-ecule of the title complex, [Co(2)(C(8)H(7)O(3))(4)(C(20)H(22)N(4)O)(2)], is a dimer of the paddle-wheel-type generated by crystallographic inversion symmetry. The Co(II) ion is penta-coordinated by three O atoms from two 4-meth-oxy-benzoate anions (one bidentate and one monodentate) and two N atoms f…
Ferroelectric thin films of Nb doped Bi3.25La0.75Ti3O12 (BLT) were prepared by chemical solution deposition method onto Pt/Ti/SiO2/Si(100) substrates using spin coating technique. From the X-ray diffraction analysis it was found that films were polycrystalline with single phase. The optical properties of the Nb doped…
In the title compound, [Cd(C(8)H(4)O(4))(C(11)H(6)N(2)O)(H(2)O)(3)]·5H(2)O, the Cd(II) atom is seven-coordinated by two N atoms from one bidentate phenanthroline-derived ligand and by five O atoms, two from one bidentate benzene-1,3-dicarboxyl-ate (1,3-BDC) ligand and three from water mol-ecules, in a distorted penta-…
A model has been developed which is able to predict the kinetics of beta alpha transformation in industrial multi component titanium alloys during complex heat treatments. The model is based on: (i) a simple geometric representations of the different morphologies commonly observed in these alloys (parent grains, allot…
Materials with good carrier mobilities are desired for device applications, but in real devices the mobilities are usually limited by the presence of interfaces and contacts. Mobility degradation at semiconductor-dielectric interfaces is generally attributed to defects at the interface or inside the dielectric, as is…
Electric motors for vehicle applications are required to have high efficiency and small size and weight. Accurately modeling the thermal properties of an electric motor is critical to properly sizing the motor. Improving the cooling of the motor windings allows for a more efficient and power-dense motor. There are a v…
Neste trabalho, compósitos híbridos metal/polímero (nanopartículas de ouro/polipirrol) foram sintetizados a partir da polimerização química do pirrol sobre a superfície de nanopartículas metálicas estabilizados por um agente surfactante (dodecil sulfato de sódio). A posterior solubilização do compósito em álcool poliv…
Using molecular dynamics(MD) simulations, we study thermal transport in graphene nanoribbons (GNR) subjected to uniform uniaxial and nonuniform strain fields. We predict significant thermal rectification (over 70%) in a rectangular armchair GNR by applying a transverse force asymmetrically. The heat flux is larger fro…
Using molecular dynamics(MD) simulations, we study thermal transport in graphene nanoribbons (GNR) subjected to uniform uniaxial and nonuniform strain fields. We predict significant thermal rectification (over 70%) in a rectangular armchair GNR by applying a transverse force asymmetrically. The heat flux is larger fro…
The asymmetric unit of the title complex, [Cu(C(14)H(17)NO(4))(C(12)H(8)N(2))]·H(2)O, contains two independent Cu(II) complex mol-ecules and two uncoordinated water mol-ecules. In each complex mol-ecule, the Cu atom is O,N,O'-chelated by the tridentate Schiff base ligand and N,N'-chelated by the 1,10-phenanthroline li…
The ability of some liquids to vitrify during supercooling is usually seen as a consequence of the rates of crystal nucleation (and/or crystal growth) becoming small- thus a matter of kinetics. However there is evidence, dating back to the empirics of coal briquetting for maximum trucking efficiency, that ellipsoids p…
A new structure is designed for the CERN Superconducting Proton LINAC as a mixture of Doublet and FoDo focusing schemes using room temperature quadrupoles. This architecture is compared to the baseline (doublet) and FoDo architectures of SPL on the basis of its beam dynamics performance and the required investment.