Materials Literature
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The antiferroelectric (AFE) Pb0.97La0.02(Zr0.60Sn0.30Ti0.10)O3 ceramic has a composition near the morphotropic phase boundary that separates the AFE from the ferroelectric (FE) phase. Its structural changes as well as macroscopic properties were investigated over a temperature range of −180–300 °C using transmission e…
Nanocrystalline carbon films possessing a prevailing diamond or graphite character, depending on substrate temperature, can be deposited from a methane hydrogen mixture by the direct current glow discharge plasma chemical vapor deposition method. While at a temperature of ∼880 °C, following the formation of a thin pre…
The effect of substituting La with Dy in the ferromagnetic perovskite ${\mathrm{La}}_{0.7}{\mathrm{Ca}}_{0.3}{\mathrm{MnO}}_{3}$ has been studied in the series $({\mathrm{La}}_{(1\ensuremath{-}x)}{\mathrm{Dy}}_{x}{)}_{0.7}{\mathrm{Ca}}_{0.3}{\mathrm{MnO}}_{3}$ $(x=0,$ 0.114, 0.243, and 0.347). Magnetic and transport p…
One important wear mechanism involves the shear of asperities by other asperities. Molecular dynamics is used to simulate the shearing of aluminum asperities by a “hard” (Lennard-Jones) asperity. These simulations involve the use of a reliable interatomic potential based on the embedded atom method for aluminum that w…
We report the optical properties of p-type SrInxTi1−xO3 (x=0.1 and 0.2) films prepared by laser molecular beam epitaxy under different oxygen pressures. The results of x-ray diffraction and near-field scanning optical microscopy indicate that the films have high crystallinity, smoothness, and uniformity. Hall measurem…
The mechanism of supramolecular chirality induction in achiral ethane-bridged syn bis-porphyrins on interaction with chiral amines (L*) was investigated by comparison of bis(zinc porphyrin), ZnZn (possessing two binding sites), with zinc-freebase bis-porphyrin, Zn2H (possessing one binding site) in CH 2 Cl 2 and CCl 4…
Pb ( Zr,Ti ) O 3 films with a Zr/(Zr+Ti) ratio of 0.48 having 1.5 μm in thickness were grown on (100)c-, (110)c-, and (111)c-oriented SrRuO3//SrTiO3 substrates by metalorganic chemical vapor deposition. It was ascertained by θ–2θ scans of x-ray diffraction that (001)T-/(100)T-/(100)R-, {110}-, and {111}-oriented films…
Crystalline orientations of disklike grains in polycrystalline silicon (poly-Si) formed by silicide-mediated crystallization (SMC) of amorphous silicon (a-Si) have been studied and compared with those of needlelike crystallites. The disklike grain can be obtained by SMC of a-Si with a silicon–nitride cap on it and its…
Self-clearing metallized film capacitor technology offers the highest energy density among high voltage capacitor technologies. The primary limitation of this technology under pulse discharge conditions is failure of the plasma sprayed end connections. Transient nonlinear finite element analysis with coupled electric…
Growth interruption and H-plasma exposure on stacking layers provide an intellectually challenging route for the deposition and control of Si nanostructures. Atomic H of the plasma not only acts as the terminator of the dangling bonds but also plays an important role in the chemical reactions during the propagation of…
Europium doped LiNaSO 4 in its nanocrystalline form has been prepared and its thermoluminescence (TL) properties are studied. The TL glow curve of the phosphor has been found to have a simple structure with a single peak at 432 K. Though the highly sensitive, commercially available TL phosphor LiF : Mg, Cu, P (TLD-700…
Technologically relevant properties, such as potential discontinuity and half-metallic behavior, are determined by means of an accurate first-principles approach for Co2MnGe/GaAs and Co2MnGe/Ge interfaces. Interface states appear in both sides of the junctions, so that half-metallicity, typical of bulk Co2MnGe, is loc…
A new type of coordination network polymer involving the redox-active polyanion, PV(2)Mo(10)O(40)(5)(-), and bridging -Cu(II)(OH(2))(4)- units, [[(Cu(II)(OH(2))(4))(3)(OH)]PV(2)Mo(10)O(40)](n)() (1), has been characterized by X-ray crystallography and several other methods. It is the first efficient heterogeneous (ins…
We have studied the effects of remote hydrogen plasma treatment on the defect characteristics in single crystal ZnO. Temperature-dependent (9–300 K) and excitation intensity-dependent photoluminescence spectra reveal that H-plasma exposure of ZnO effectively suppresses the free-exciton transition and redistributes int…
We report the observation of thermally driven mechanical vibrations of suspended doubly clamped carbon nanotubes, grown by chemical vapor deposition (CVD). Several experimental procedures are used to suspend carbon nanotubes. The vibration is observed as a blurring in images taken with a scanning electron microscope.…
The effects of citric (H 3 cit), tartaric (H 2 tart), and acetic (HAc) acid on the growth of nanoparticles of calcium oxalate (CaOxa) were investigated in a lecithin−water ordered liposome system by means of X-ray diffraction, transmission electron microscopy, and Fourier transform infrared spectroscopy. The morpholog…
This paper reports an aggregation-based method for the fabrication of composite Au/Ag nanoshells with tunable thickness and surface roughness. It is found that the resultant roughened composite Au/Ag nanoshells can attract each other spontaneously to form films at the air−water interface. Importantly, such films can b…
Electroless plated copper can be deposited on a TaN surface initiated by displacement plating when the surface oxide layer is removed by wet chemical etching. For application to ultra-large-scale integrated (ULSI) interconnection technology in which very thin TaN barrier films are used, it is essential to form a stabl…
Abstract Mononuclear cis ‐dichloro complexes, [L n MCl 2 ], with different metal centres (Pt II , Ni II , and Zn II ) and a series of palladium and platinum derivatives, [L 2 MX 2 ], in which chloride groups are replaced with iodide, bromide, and azide ligands, have been synthesized from 4,4′‐disubstituted‐2,2′‐bipyri…
Abstract 2,2‐Bis[4(4‐aminophenoxy)phenyl]phthalein‐3′,5′‐bis(trifluoromethyl)anilide (6FADAP), containing fluorine and phthalimide moieties, was synthesized via the Williamson ether condensation reaction from 1‐chloro‐4‐nitrobenzene and phenolphthalein‐3′,5′‐bis(trifluoromethyl)anilide, which was followed by hydrogena…