Materials Literature
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Abstract Time‐resolved luminescence measurements have been carried out for PbMoO 4 crystals with the scheelite structure. A fast‐decaying luminescence band with a lifetime of the order of 10 ns is observed at 400 nm at low temperatures ( T < 170 K). This luminescence is tentatively assigned to the radiative transit…
The adsorption mechanisms of O 2 on a Si(111)-7 × 7 surface were studied using real-time X-ray photoelectron spectroscopy with synchrotron radiation in conjunction with a supersonic molecular-beam technique. To study the dependence of the initial sticking probability, s 0, saturation coverage of the O 2 incident energ…
We report intense green luminescence upon blue light excitation in -activated prepared by high temperature solid state reaction with nominal composition of . It is observed that the material phase gradually converts from to followed by improved luminescent properties with increasing . The two phosphors both emit with…
We report the results of the angular-dependent magnetoresistance oscillations (AMROs), which can determine the shape of bulk Fermi surfaces (FSs) in quasi-two-dimensional (Q2D) systems, in a highly hole-doped Fe-based superconductor KFe2As2 with Tc ≈ 3.7 K. From the AMROs, we determined the two Q2D FSs with rounded-sq…
YbbR domains are widespread throughout Eubacteria and are expressed as monomeric units, linked in tandem repeats or cotranslated with other domains. Although the precise role of these domains remains undefined, the location of the multiple YbbR domain-encoding ybbR gene in the Bacillus subtilis glmM operon and its pre…
Abstract In this study, novel biodegradable materials were successfully generated, which have excellent mechanical properties in air during usage and storage, but whose structure easily disintegrates when immersed in water. The materials were prepared by melt blending poly( L ‐lactic acid) (PLLA) and poly(butylene adi…
The methods for measuring the discharge of a natural load in a river or a channel\nfall into four main categories: 1. Volumetric methods make it possible to determine the discharge directly by\nmeasuring the time needed to fill a container of a given capacity with water. Given\nthe practical problems inherent in this…
Abstract Unsaturated polyesters with maleic acid and different molar ratio of phthalic anhydride to adipic acid were produced, mixed with styrene, and cured. The degree of double bonds conversion, determined by differential scanning calorimetry (α DSC ), indicating the initial curing, increases significantly with the…
RATIONALE AND OBJECTIVES: The objective of this study was to evaluate effects of 6 commercially available magnetic resonance contrast media (CM) on human umbilical vein endothelial cells (HUVEC) and the induction of transforming growth factor-beta (TGF-β) in dermal fibroblasts (HSF) as a possible model for the pathoge…
Low molecular weight benzenedicarboxylic acid has a very well-defined molecular structure because of its rigid and planar backbone. Therefore, it is hypothesized to have high potential for highly directed bridging between surfaces. However, phthalic acid cannot participate in particle bridging because the two carboxyl…
Abstract Lateral flexible linking of shape memory polyurethane (SMPU) by a polyethyleneglycol (PEG) linker through the allophanate linking method was studied, while adjusting the soft segment content and PEG length. The SMPU was composed of 4,4′‐methylenebis(phenylisocyanate) (MDI), poly(tetramethyleneglycol) (PTMG),…
Abstract Biocompatible‐ingestible electronic circuits and capsules for medical diagnosis and monitoring are currently based on traditional silicon technology. Organic electronics has huge potential for developing biodegradable, biocompatible, bioresorbable, or even metabolizable products. An ideal pathway for such ele…
The ternary thallium chalcogenides of the general formula Tl(4)MQ(4) (M = Zr or Hf; Q = S or Se) were obtained from high-temperature reactions without air. These sulfides and selenides are isostructural, crystallizing in the triclinic system with space group P1 and Z = 5, in contrast to Tl(4)MTe(4) compounds that adop…
Effective decomposition of toxic gaseous compounds is important for pollution control at many chemical manufacturing plants. This study explores catalytic decomposition of phosphine (PH(3)) using novel metal-promoted carbon nanotubes (CNTs). The cerium-promoted Co/CNTs catalysts (CoCe/CNTs) are synthesized by means of…
Coir dust reinforced polymer composites are prepared with epoxy resin as the matrix. The dielectric parameters (relative permittivity ε′, dielectric loss ε′′), AC conductivity σ, and resistivity ρ of pure epoxy resin and composites with different weight percent of coir dust were obtained in a frequency range of 100 Hz…
Mesoporous and dense sol−gel titania films have been synthesized and processed in similar conditions to make a comparative study of crystallization to anatase in porous and dense samples. We have performed a correlative analysis combining THz spectroscopy with synchrotron radiation, variable angle incidence infrared s…
Abstract A novel photodegradable poly(vinyl chloride)‐polyoxometalate/TiO 2 (PVC‐POM/TiO 2 ) nanocomposite film was prepared by embedding nano‐TiO 2 photocatalyst modified by POM into the commercial PVC plastic. The solid‐phase photocatalytic degradation behavior of as‐prepared film under UV light irradiation was inve…
Abstract Bi 12 M x O 20± δ (hereafter BMO; M=Ti, Si, Ge) materials, which have been used as ferroelectric materials, actuators, capacitors, and dielectric and photorefractive materials, have attracted attention as photocatalysts and exhibit high photocatalytic activities in many reactions. However, seldom has work bee…
Flower-like hierarchical Ni3(NO3)2(OH)4 and Zn5(OH)8(NO3)2(H2O)2 compounds were synthesized by a simple solvothermal method. Absolute ethanol was adopted as solvent, and the precursor is the corresponding nitrate. The as-prepared products were studied by XRD, SEM, TEM, and SAED. It is noted that compared to the conven…
The currently available results of the isotope effect on the superconducting transition temperature ${T}_{c}$ in Fe-based high-temperature superconductors (HTSs) are highly controversial. The values of the Fe isotope effect exponent ${\ensuremath{\alpha}}_{\text{Fe}}$ for various families of Fe-based HTS were found to…