Materials Literature
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We study the scattering properties of very small spheres made of a negative refractive index (NRI) using circuit network principles. The Lorenz-Mie theory is used to represent the transverse magnetic and transverse electric scattering coefficients based on resistor, inductor, and capacitor (RLC) ladder circuit models…
The small-signal power gain of Si quantum dots embedded in a Si-rich SiOx(SiOx:Si-QD)-based ridge waveguide amplifier with an inhomogeneously broadened spontaneous emission is analyzed and simulated. The small-signal power gain and the direct bandgap radiative recombination rate of SiOx:Si-QD waveguide amplifier are l…
In this article, morphology of progesterone polymorphs prepared by polymer-induced heteronucleation (PIHn) technique was studied. Hydroxypropyl methylcellulose(HPMC), such as dextran T-500 and gelatin G-9382, polyisoprene (PI), and acrylonitrile/butadiene copolymer (NBR) were used as substrates. The crystallizations w…
= -- - (4) By assuming that the standard thermodynamic entities of the intra-crystalline reaction are equal to zero, i.e., o r ,298 0 = , the standard values of the molar thermodynamic entity of the hydration water, ( ) f Hyd HO 0 ,298 2 , is finally obtained from eqs (2) and (4):
A series of oxygen deficient LuFe(2)O(4-δ) materials have been prepared under a controlled oxygen partial-pressure atmosphere. Measurements of magnetization reveal that the increase of oxygen deficiencies could evidently depress the ferrimagnetic phase transition temperature (T(N)). In additional to the well-known cha…
Titanium- and silicon-modified novolac (TSN) resins were prepared by the reaction of novolac resin with the organotitanium polysiloxane. TSN resins with a series of inorganic element contents were prepared, and the corresponding silicon fiber reinforced TSN composites (TSN/silica fiber) were fabricated by the compress…
In this letter, we study the low-frequency noise behavior of RESET-state Phase-Change Memory (PCM) devices belonging to a 45-nm technology node. Furthermore, by dealing with a typical case study, we calculate the fluctuation of the cell readout current induced by$\hbox{1}/f$noise and provide predictions for estimating…
Nanostructured thin films of a mixed-valence, layered vanadium oxide were prepared using layer-by-layer deposition. The thin films were characterized by electronic (UV–vis) spectroscopy, quartz crystal microbalance, profilometry and scanning electron microscopy techniques. The highest charge capacity was obtained for…
A new scaling formalism is used to analyze nonlinear I-V data in the vicinity of metal-insulator transitions (MIT) in five manganite systems. An exponent, called the nonlinearity exponent, and an onset field for nonlinearity, both characteristic of the system under study, are obtained from the analysis. The onset fiel…
The preparation of monodisperse nanoparticles with uniform size, shape and composition has been intensively pursed because of their scientific and technological interests [1-4]. The major advantage of monodisperse particles may be attributed to the uniform properties of individual particles, which makes the property o…
The photoelastic constant (PEC) is evaluated for 15 zinc tin phosphate glasses in a series of xZnO-(67-x)SnO-33P(2)O(5) where x is 0-30 mol. % at 0.5-7 mol. % intervals. The phase retardation of polarized light, passing through a disk sample with applying various uniaxial loads, was measured for PEC determinations by…
The state of a glassy material can be altered considerably through the application of stress. The origins of this effect, and its relation to molecular mobility, are not well understood. Recent experimental, theoretical, and simulation studies have examined molecular mobility under deformation for different classes of…
Significance Single‐phase β‐ SiAlON particles with submicron size were prepared via combustion synthesis ( CS ) using natural kaolin, Si , and Al as raw materials under a nitrogen atmosphere of 1 MPa. Kaolin could not only act as the raw material to provide the source of oxygen, but also act as the diluent to reduce t…
The depolymerization of poly(2,6-dimethyl-1,4-phenyleneoxide) (PPO) was accomplished by employing 4-tert-butyl-2,6-dimethylphenol (TBDMP) and 2,6-dimethylphenol (DMP) under oxidative conditions in green solvents: water and ionic liquid. PPO depolymerized to oligomeric products in a faster process within 5 min with TBD…
Given the increasing global demand for pulp, there is a need to look into the prospects of increasing fiber production and shortening the harvesting cycle of abaca without sacrificing the quality of fibers for pulp production. This study investigated the chemical and pulp properties of abaca cv. Inosa fibers harvested…
In this work we investigate the magnetic field dependence of A(g) octahedra rotation (tilt) and B(2g) symmetric stretching modes frequencies at different temperatures. Our field-dependent Raman investigation at 10 K is interpreted by an ionic displacive nature of the magnetically-induced ferroelectric phase transition…
Synthesis and characterization of nano-crystalline silicon grown by atom beam sputtering technique are reported. Rapid thermal annealing of the deposited films is carried out in Ar + 5% H2 atmosphere for 5 min at different temperatures for precipitation of silicon nano-crystals. The samples are characterized for their…
We studied the effect of selective hydrogenation of the polyisoprene block in poly(isoprene- b -styrene- b -methyl methacrylate) (ISM) triblock copolymers on nanoscale network phase formation. The morphologies of the resulting poly((ethylene- alt -propylene)- b -styrene- b -methyl methacrylate) (EPSM) triblock copolym…
Hydroxyethylcellulose (HEC)- graft -poly( p -dioxanone) (PPDO) copolymer (HEC- g -PPDO) was synthesized homogeneously in ionic liquid 1-butyl-3-methylimidazolium chloride by coupling PPDO onto HEC backbone in the presence of 1,6-hexamethylene diisocyanate (HDI). When the feed ratio of PPDO and HEC was adjusted, as wel…
We present a study of the magnetic properties of the Pr(0.5)Sr(0.5-x)Ca(x)MnO(3) manganite (x = 0.1 and 0.2) in the temperature region where phase separation occurs. This state is characterized by the presence of ferromagnetic (FM) inclusions inside an antiferromagnetic (AFM) matrix. The evolution of the magnetization…