Materials Literature
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High-quality straight and multiply kinked CdTe nanowires (NWs) were synthesized by the facile chemical vapor deposition method at 600 °C. The as-synthesized NWs were characterized by scanning electron microscopy, high-resolution transmission electron microscopy, energy-dispersive x-ray spectroscopy, and photoluminesce…
A large-scale comparison of essential dynamics (ED) modes from molecular dynamic simulations and normal modes from coarse-grained normal mode methods (CGNM) was performed on a dataset of 335 proteins. As CGNM methods, the elastic network model (ENM) and the rigid cluster normal mode analysis (RCNMA) were used. Low-fre…
Abstract In this paper, a relationship between electric spark sensitivity and molecular electronic properties is studied for polynitroaromatic compounds. The lowest unoccupied molecular orbital energy and the Mulliken charges of the nitro group, and the number of the aromatic rings as well as certain substituted group…
Time-resolved comparative study of dual magnetron sputtering (dual-MS) and dual high power impulse magnetron sputtering (dual-HiPIMS) systems arranged with closed magnetic field is presented. The dual-MS system was operated with a repetition frequency 4.65 kHz (duty cycle ≈50%). The frequency during dual-HiPIMS is low…
The impact of laser pulsing on the field evaporation process is investigated for Al and W by pulsed laser atom probe tomography. Quantitative analysis reveals the influence on the spatial resolution of the peak temperature reached by the specimen following light absorption from the laser pulse. It is concluded that su…
Cubic metastable Ti0.34Al0.66N/TiN multilayer coatings of three different periods, 25+50, 12+25, and 6+12 nm, and monoliths of Ti0.34Al0.66N and TiN where grown by reactive arc evaporation. Differential scanning calorimetry reveals that the isostructural spinodal decomposition to AlN and TiN in the multilayers starts…
The effect of front and rear texture of thin-film microcrystalline silicon solar cells on light trapping is evaluated by characterizing solar cell specimens with both superstrate (p-i-n) and substrate (n-i-p) configurations that have a variety of surface morphologies including intentionally polished flat surfaces. It…
We have used the magnetooptical Kerr effect to investigate the shape of the hysteresis loops of thin GaMnAs films grown on substrates with different buffer layers. Depending on whether the easy axis of magnetization is in the plane of the thin film or out of the plane, and depending on the orientation of the external…
We have prepared a CrO2 thin film by chemical vapor deposition from a Cr8O21 precursor and studied the bulk and surface physical properties. The CrO2 thin film is grown on a TiO2 (100) substrate by heating of a Cr8O21 precursor and TiO2 (100) substrate together in a sealed quartz tube. The prepared film is found from…
We report studies of the interactions of quantified deuterium (hydrogen) atom beams with hard amorphous hydrogenated carbon films at a substrate temperature of ∼330 K in an ultrahigh-vacuum chamber. The modification/erosion of a-C:H (a-C:D) films was monitored in situ by ellipsometry in real time. By interpreting the…
High-resolution synchrotron radiation diffraction results indicate that the room temperature tetragonal (T) phase in (93–92)%Pb(Zn1/3Nb2/3)O3–(7–8)%PbTiO3 [PZN–(7–8)%PT] single crystals is a metastable phase stabilized by the transformation-cum-cooling stress in the crystal. This is manifested by the “missing” (001)T…
In situ high-resolution synchrotron x-ray diffraction, dielectric permittivity, hysteresis loop, and polarization current, were used to investigate phase transitions of (211)-cut 0.70Pb(Mg1/3Nb2/3)O3–0.30PbTiO3 single crystal before and after an electric (E) field poling. A rhombohedral (R)–tetragonal (T)–cubic transi…
A phonon Boltzmann equation solver using multiblock-structured grid system is developed and applied to study transverse thermal transport in silicon–germanium circular-wire nanocomposite (silicon nanowires embedded in germanium host matrix). Past studies usually assume geometric simplification for the circular-wire na…
Four types of filled double-walled carbon nanotubes (DWNTs) (Se@DWNT; Te@DWNT; HgTe@DWNT; and PbI2@DWNT) have been studied by high-resolution transmission electron microscopy and micro-Raman spectroscopy in the temperature interval from 80 to 700 K employing 785 nm excitation wavelength. The temperature dependence of…
The influence of arrangement, dimensions, and magnetic permeability of the magnetic flux shunts on the flux distribution and leakage reactance of the power transformers is studied in this paper by using a finite elements method and a simple modeling approach. By using magneto-static analysis and finite element method,…
Magnetization curves recorded at high sweep-rates on magnetic materials near a phase transition temperature can be affected by temperature changes in the material due to the magnetocaloric effect. This change in the sample temperature is a result of the quasiadiabatic conditions that can occur under such conditions an…
Various samples of the solid solution Gd2NixCu2−xMg were synthesized from the elements in sealed tantalum ampoules in an induction furnace. All members crystallize with the tetragonal Mo2FeB2 type structure, space group P4/mbm, and they were characterized on the basis of Guinier powder patterns and energy dispersive X…
We have fabricated Ni–Fe–Ga β single phase alloy ribbons with Ga content less than 25 at. %. Higher spinning rate of melt-spinning technique can produce β single phase alloys without precipitation of γ particles, whereas lower spinning rate results in the β+γ two phase structure. This higher quenching rate is found to…
In this paper, we demonstrated the encapsulation of ZnS:Mn2+ nanowires (NWs) and ZnO quantum dots (QDs) with a layer of mesoporous SiO2 shell for the purpose of integrating dual emission property into one common nanostructure. The average diameter of ZnS:Mn2+ NWs, ZnO QDs, and ZnS:Mn2+/ZnO@SiO2 heterostructure was abo…
We performed density-functional theory calculations to study the energetic stability and the electronic structures of negatively-charged nitrogen-silicon-vacancy center (N-VSi)− in cubic silicon carbide (3C–SiC). We show that the (N-VSi)− center is energetically preferable in n-type 3C–SiC and possesses a stable A32 g…