Materials Literature
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Abstract The study focuses on the characterization of the superparamagnetic microspheres of poly(methyl methacrylate) (PMMA) prepared by the modified suspension polymerization. The nano‐sized oleic acid‐coated magnetite particles (OMP) mixed with methyl methacrylate (MMA) monomers and divinylbenzene were employed to p…
A DFT study of the isostructural compounds [UO2L5](n-) with n=3-5 and linear [Cp2UL5](m-) with m=1-3 has been carried out for two different anionic ligands. Structurally stable structures are obtained for all systems. The coordination competition between cyanide (CN(-)) and isocyanide (NC(-)) as well as between cyanat…
The charge transport in organic semiconductors has been investigated theoretically. An analytical model describing the effect of partially filled localized states on the concept of transport energy is presented, based on variable range hopping theory. The results illustrate that at low enough temperature the partially…
Boron has been considered most attractive fuel for ducted rockets because of its high combustion heat with oxygen. However, boron was found to be impractical as the fuel because of its poor combustion efficiency due to the meager ignition characteristics. Boron had to be ignited and combusted forcibly in the residence…
In this letter, we report metal-enhanced e-type fluorescence. Eosin in close proximity to silver island films (SiFs) shows enhanced e-type fluorescence with an approximately two-fold higher intensity observed from SiFs, as compared to a control sample. Our findings suggest two complementary mechanisms for the enhancem…
Visible blue light emitting diodes have been produced on freestanding nonpolar GaN (11-20) a-plane substrates by metal-organic chemical vapor deposition. The growth conditions have been optimized for smooth growth morphology of GaN nonpolar homoepitaxial layers without surface features, leading to light emitting diode…
Abstract A series of complexes, [ZnLCl2]2 (1), [ZnL2(NO3)2]∞ (2), [MnL2(NO3)2]∞ (3), {[ZnL2(H2O)2](ClO4)2(CH3COCH3)2}∞ (4), {[MnL2(H2O)2](ClO4)2(CH3COCH3)2}∞ (5), {[CdL2(H2O)2]‐(ClO4)2(H2O)6}∞ (6), and {[AgL](ClO4)(H2O)1.5}∞ (7), based on the flexible ligand 2,3‐bis(triazol‐1‐ylmethyl)quinoxaline (L) were synthesized…
The behavior of stress induced leakage current (SILC) in thin HfOxNy films is investigated. Except for the H dispersive transport process, the electron trapping process is responsible for the SILC generation in HfOxNy dielectric. This trapping process is severely modulated by temperature, thickness, and stress polarit…
Film of Fe3O4 was prepared with laser molecular beam epitaxy deposition on a Si substrate with a native SiO2 layer. When the temperature is increased above 250K, the resistance drops rapidly because the conduction path starts to switch from the Fe3O4 film to the inversion layer underneath the SiO2 via thermally assist…
BACKGROUND: Recent approaches for predicting the three-dimensional (3D) structure of proteins such as de novo or fold recognition methods mostly rely on simplified energy potential functions and a reduced representation of the polypeptide chain. These simplifications facilitate the exploration of the protein conformat…
Abstract The compounds [Cu2(SIP‐O)(bpy)2(H2O)2]·7H2O (1) and [Mn(HSIP)(bpy)]n (2) were synthesized by the hydrothermal reactions of Cu(OH)2 or MnCl2, 5‐sulfoisophthalic acid monosodium salt (NaH2SIP), and 2,2′‐bipyridine (bpy). Single‐crystal X‐ray diffraction reveals that the unprecedented hydroxylation of SIP3– cata…
Nonuniform and nonperiodic grooves are used to enhance the transmission and directivity of emissions from a single metallic subwavelength aperture. By using nonuniform and nonperiodic grooves, the amplitude and phase of the diffracted power flow from each groove can be adjusted properly. As a result, the transmission…
We studied the influence of the optical excitation on three muonium centers ${\mathrm{Mu}}_{T}^{0}$, ${\mathrm{Mu}}_{\mathit{BC}}^{0}$, and ${\mathrm{Mu}}_{\mathit{BC}}^{+}$ in high resistivity silicon. These investigations were carried out on the spin precession signature of each center as a function of temperature.…
Boron hydrolysis reaction can be used for onboard production of hydrogen. Boron is a promising candidate because of its low molecular weight and relatively high valence. The oxide product from this process can be reduced and the boron can be recovered using known technologies, e.g., chemically with magnesium or via el…
Abstract Acrylic emulsion pressure‐sensitive adhesives (PSAs) were synthesized by the copolymerization of n ‐butyl acrylate with various levels of 2‐ethyl hexyl acrylate (2EHA) and a small constant amount of acrylic acid. The effect of varying the n ‐butyl acrylate/2EHA monomer composition on the kinetic behavior of t…
In this work, the fabrication of WO3∕W nanocrystals for nonvolatile memory devices has been achieved via rapid thermal oxidation of tungsten silicide. Amorphous Si and WSix (x=2.7) layers were deposited onto the tunneling oxide and sequentially oxidized to form well-shaped WO3∕W nanocrystals. The mean size of WO3∕W na…
Twin defect modes are found to merge into each other in one-dimensional photonic crystals consisting of periodic layers of single-negative (permittivity- or permeability-negative) materials and multiple single-negative defect layers. By increasing the size or the number of the defects, the two defect modes both approa…
We present the electric properties of p-InAs nanowire field-effect transistors showing ambipolar conduction. Be doped nanowires are grown by the vapor-solid-solid mechanism using molecular beam epitaxy with in situ deposited Au catalyst particles. P-type conduction in InAs nanowires is challenging because of the Fermi…
We present experiments and an accompanying theory for the growth modes during metalorganic vapor-phase epitaxy on vicinal GaAs(001). Our theory is based on a model that takes account of deposition, diffusion, and dissociation of molecular precursors, and the diffusion and step incorporation of atoms released by the pr…
Bulk heterojunction solar cells, consisting of the active film of poly[2-methoxy,5-(2-ethylhexoxy)-1,4-phenylene vinylene] (MEH-PPV) doped with cadmium selenium (CdSe) nanoparticles, were fabricated and investigated using impedance spectroscopy (IS) technique. The spectroscopy displayed a phenomenon of negative imagin…