Materials Literature
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O − radical anions were observed over a partially hydroxylated MgO surface after illumination by monochromatic light with λ = 280 and 303 nm. As all corner oxygen atoms are covered with adsorbed hydroxyl groups after activation at 450 °C, this process is initiated by selective excitation of 3-coordinated complexes [Mg…
This paper summarizes experimental evidence of anomalous luminescence in Eu(2+)-doped fluoride crystals Ba(x)Sr(1-x)F(2) (x = 0, 0.3, 0.5 and 1). Luminescence, luminescence excitation spectra and luminescence kinetics obtained at ambient and high hydrostatic pressure at various temperatures are discussed. Hydrostatic…
Jute fabrics reinforced polypropylene (PP) composites (40% fiber by weight) are prepared using compression molding. Different formulations using oligomer urethane diacrylate (M-1100), monomers 2-ethyl hexyl acrylate (EHA), 1-vinyl 2-pyrrolidone (NVP), and photo-initiator (Irgacure-369) in methanol were prepared in ord…
Physical and mechanical properties of a new composite of 70% (by weight) old corrugated container recycled fibers, 27% high-density polyethylene, and 3% compatibilizer (maleic anhydride polyethylene) were evaluated with a focus on dimensional stability. Maximum water absorption, thickness swelling, width swelling, and…
In this paper a theory of multi-walled carbon nanotubes and a suitable way for modelling them using the finite element method is presented. A brief reference to FE modelling of a single-walled carbon nanotube (SWNT) is given as an introduction to modelling of multi-walled carbon nanotubes, consisting of several layers…
(Si : O x : C y : H z ) thin films were deposited on knitted wool fabrics by plasma-enhanced chemical-vapor deposition using hexamethyldisiloxane as a monomer and argon and oxygen as feed gases in low-pressure equipment. Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy analyses confirmed th…
In order to couple high cellular uptake and target specificity of dendrimer molecule with excellent optical properties of semiconductor nanoparticles, the interaction of cysteine-capped CdTe quantum dots with dendrimer was investigated through spectroscopic techniques. NH(2)-terminated dendrimer molecule quenched the…
Effects of the substitution of Fe by Co or Ni on the crystal structure of the n = 2 Ruddlesden−Popper phase Sr 3 Fe 2 O 6+δ have been studied by in situ high temperature neutron powder diffraction (NPD) in the temperature range 20 °C ≤ T ≤ 900 °C. The analysis of neutron diffraction data confirmed that for a given tem…
Abstract By means of in situ graft method, polypropylene (PP)‐wrapped carbon nanotubes (CNTs) composite were prepared. Infrared spectroscopy (IR) results showed that there was covalent linkage between PP and CNTs via maleic anhydride (MAH) grafting. Owing to the uniform dispersion of CNTs and covalent adhesion between…
A combination of ab initio molecular dynamics and parameter-free analysis of time-correlation functions based on the generalized collective mode approach is applied for the study of collective dynamics in a molten salt NaI beyond the hydrodynamic region and manifestation of collective excitations in dynamic structure…
We report multiple holographic recording and optical address recognition schemes in Methyl Red-doped liquid-crystal film without an applied electric field. Ten gratings are recorded at a single location of a 5 mm2 area by using optical multiplexing methods, and the diffraction efficiencies are studied for multiplexed…
Abstract Commercial blow molding grade recycled high density polyethylene (R‐HDPE) and blow molding grade virgin high density polyethylene (V‐HDPE) were reactively extruded with various compositions (0.00–0.15% wt/wt) of different peroxides in a twin screw extruder. The aim was to produce the extended chain mechanism…
In this work, the effect of a negative thermal expansion zirconium tungstate (ZrW2O8) filler on the cure behavior of a unique low-viscosity bisphenol E cyanate ester (BECy) is characterized by differential scanning calorimetry. The cure rate of BECy is found to increase upon the incorporation of ZrW2O8 particles, and…
DNA ligases join the breaks in double-stranded DNA by catalyzing the formation of a phosphodiester bond between adjacent 3'-hydroxyl and 5'-phosphate termini. They fall into two classes that require either ATP or NAD(+) as the source of an AMP group that is covalently attached to a strictly conserved lysine. Conformat…
The spin-orbit coupling (SOC) of single-walled carbon nanotube (SWNT) has been studied using both the first-principles and tight-binding (TB) methods. It is found that the curvature-induced $\ensuremath{\sigma}\text{\ensuremath{-}}\ensuremath{\pi}$ coupling in the SWNTs always causes a more strong SOC in their $\ensur…
Inspired by the brilliant whiteness of Cyphochilus beetles found in Southeast Asia, we produced an electrospun nanofiber web with a very high CIE whiteness index, thus providing an extremely effective and efficient light shielding layer for textile and industrial applications. Polyurethane, polymethyl methacrylate and…
For the first time, a new member of the BIMEVOX family, namely BICEVOX, has been synthesized by the partial solid-state substitution of Ce(IV) for vanadium in parent Bi4V2O11 solid electrolyte. The electrical conductivity in Bi4Ce x V2− x O11−( x /2)− δ has been investigated in the compositional range 0 ≤ x ≤ 0.30, us…
Treatment of 2,2,6,6-tetramethyl-1-piperidinyloxy (TEMPO) with a group 1 metal (Li, Na, K, Rb, or Cs), resulted in the reduction of this important radical to the TEMPO(-) anion--the first examples of elemental-metal single electron reduction of the radical to its anionic form. The synthesis and characterization of sev…
We have studied numerically the statistics for electronic states (level spacings and participation ratios) from disordered graphene dots of finite size, described by the aspect ratio $W/L$ and various geometries, corresponding to finite chiral or achiral carbon nanotubes. Quantum chaotic Wigner energy level-spacing di…
We report theoretical investigations of the coloration of ${\text{WO}}_{3}$ upon charge insertion using sodium tungsten bronze $({\text{Na}}_{x}{\text{WO}}_{3})$ as a model system. Our results explain well the systematic color change of ${\text{Na}}_{x}{\text{WO}}_{3}$ from dark blue to violet, red-orange, and finally…