Materials Literature
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In this paper, the development of a permanent-magnet (PM) motor made of amorphous alloy (AA) core is presented. The motor is rated as 20 kW, and base speed is 2500 r/min. A massive produced interior PM motor used in electric vehicle traction application is chosen as the baseline motor. An optimization software package…
Production of gold nanoparticles (GNPs) by biological route was examined using a marine‐derived fungal isolate. The isolated strain was identified as Aspergillus sydowii based on morphological traits and molecular identification technique. The test strain exhibited the potential to produce GNPs. A noteworthy observati…
[(PbSe) 1.14 ] m (NbSe 2 ) n compounds with 1 ≤ m ≤ 6 and n = 1 were synthesized using the modulated elemental reactants (MER) method. X-ray diffraction patterns (XRD) showed that the desired compounds self-assembled during annealing of the precursors with their c -axis crystallographically aligned normal to the subst…
We present an innovative surface-enhanced Raman spectroscopy (SERS) sensor based on a biological-plasmonic hybrid nanostructure by self-assembling silver (Ag) nanoparticles into diatom frustules. The photonic-crystal-like diatom frustules provide a spatially confined electric field with enhanced intensity that can for…
The saga of liquid crystals started with their discovery in 1888 by the botanist Friedrich Reinitzer, who unexpectedly observed "two melting points" for crystals extracted from the root of a carrot. At the end of the nineteenth century, most scientists did not believe in the existence of "liquid crystals" as promoted…
Blocking characteristics of diamond junction field-effect transistors were evaluated at room temperature (RT) and 200°C. A high source-drain bias (breakdown voltage) of 566 V was recorded at RT, whereas it increased to 608 V at 200°C. The positive temperature coefficient of the breakdown voltage indicates the avalanch…
A dual circularly polarized horn antenna, which employs a chiral metamaterial composed of two-layered periodic metallic arc structure, is presented. The whole antenna composite has functions of polarization transformation and band-pass filter. The designed antenna produces left-handed circularly polarized wave in the…
The white light-emitting diode (WLED) is a state-of-the-art solid state technology, which has replaced conventional lighting systems due to its reduced energy consumption, its reliability, and long life. However, the WLED presents acute challenges in device engineering, due to its lack of color purity, efficacy, and t…
We describe herein a high-yield method to selectively disperse semiconducting CoMoCAT (CO disproportionation on Co-Mo catalysts) single-walled carbon nanotubes (SWNTs) with regioregular poly(3-alkylthiophenes) polymers. We observed that the dispersion yield was directly related to the length of the polymer's alkyl sid…
The cavities of carbaporphyrinoid systems provide unique environments for the formation of organometallic species. These systems commonly act as either dianionic or trianionic ligands, and may stabilize unusual oxidation states such as silver(III). Although the metalation of N-confused porphyrins has been explored in…
Metamaterial-based perfect absorbers utilize the intrinsic loss, with the aid of appropriate structural design (completely suppress transmission and reflection), to achieve near unity absorption at a certain frequency. The frequency of the reported absorbers is usually fixed and operates over a limited bandwidth, whic…
The standard model of enhanced ionic conductivities in solid electrolyte heterostructures follows from a continuum mean-field description of defect distributions that makes no reference to crystalline structure. To examine ionic transport and defect distributions while explicitly accounting for ion-ion correlations an…
We have performed density functional theory calculations using the linearized augmented plane wave method (LAPW) with the local density approximation (LDA) functional to study the electronic structure of the iron-based superconductor iron-selenium (FeSe). In our study, we have performed a comprehensive set of calculat…
Melt-fragility index (m) and glass molar volumes (Vm) of binary Ge–Se melts/glasses are found to change reproducibly as they are homogenized. Variance of Vm decreases as glasses homogenize, and the mean value of Vm increases to saturate at values characteristic of homogeneous glasses. Variance in fragility index of me…
We investigate the effect of hydrogen coverage on the optical conductivity of single-side hydrogenated graphene from first-principles calculations. To account for different degrees of uniform hydrogen coverage we calculate the complex optical conductivity for graphene supercells of various sizes, each containing a sin…
Results of absolute light yield measurements on strontium and barium fluoride doped with PrF3and CeF3are presented and compared with light yield of well-known scintillators s(NaI-Tl and CsI-Tl). For pure SrF2crystal, we obtain the value of about 29,200 photons/MeV.
Abstract Die multidisziplinäre Forschung zu neuen organischen Lumineszenzfarbstoffen wird durch mögliche Anwendungen in der Kunststoffelektronik und Biomedizin vorangetrieben. Die Anordnung ausgeklügelter Fluoreszenzfarbstoffe um ein tetraedrisches Bor(III)‐Zentrum herum ist eine besondere Herangehensweise, die die Kr…
The synthesis, structural characterization, and ethylene polymerization properties of two neutrally charged Ni(II) phenoxyiminato catalysts are compared and contrasted. Complex FI-SO 2 -Ni features a −SO 2 – group embedded in the ligand skeleton, whereas control FI-CH 2 -Ni has the −SO 2 – replaced by a −CH 2 – functi…
Nanolaminates are of great interest for their unique properties such as high dielectric constants and advanced mechanical, electrical, and optical properties. Here we report on the tuning of optical and structural properties of Al 2 O 3 /ZnO nanolaminates designed by atomic layer deposition (ALD). Structural propertie…
The conduction-band offset (CBO) of the Zn(O, S)/Cu(In,Ga)Se$_{2}$heterojunction can play a significant role in the performance of solar cells. The individual electron affinities and bandgaps are controlled by the oxygen-to-sulfur and gallium-to-indium ratios, and the resulting offsets can range from +1.3 eV in the “s…