Materials Literature
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Thermal expansion behaviors of Ba 6−3 x Ln 8+2 x Ti 18 O 54 (Ln=La, Nd, and Sm, x =0.5, 0.67, and 0.75) ceramics were determined by dilatometric measurement. The samples of all investigated compositions expanded nearly linearly with increasing temperature in the range of 20°–1200°C. Their thermal expansion coefficient…
We introduce a way to estimate the fluctuation of the refractive index during thin film deposition, through an optical monitor. The thicknesses and error-compensated thickness for each layer are analyzed. A novel monitoring method is thereby derived. The revised refractive index and the choice of highly sensitive moni…
Here, we report an alternative route to the preparation of highly luminescent CdTe nanocrystals (NCs) using Te nanorods instead of freshly prepared NaHTe as the Te source via a one-pot route under hydrothermal conditions. Furthermore, microtubes with red fluorescence were generated via simply aging the above CdTe NC s…
Abstract The kinetics of isothermal crystallization along with subsequent melting behavior of melt‐mixed immiscible binary blends of poly(trimethylene terephthalate) (PTT) and polyamide‐12 (PA12) were investigated by means of differential scanning calorimetry. Three macrokinetic models of Avrami, Tobin, and Malkin wer…
Planar antiferroelectric liquid crystal (AFLC) cells exhibit propagating solitary waves. By measuring the retardation and the apparent tilt angle, we find that the conventional model for the solitary wave propagation in AFLCs is not generally applicable. The model being proposed here shows that the solitary wave propa…
Dielectric and ferroelectric properties of chemically synthesized and sintered lead lanthanum zirconate titanate and lead zirconate titanate discs were studied. The as-burnt powders were directly sintered to 94% and 96% of the theoretical density at 1100 °C and 1200 °C, respectively for lead lanthanumm zirconate titan…
A copper-ion-exchanged MFI-type zeolite, CuMFI, which exhibits an extremely efficient adsorption of the dinitrogen (N 2 ) molecule at room temperature, has been successfully prepared by ion exchange in an aqueous solution of Cu(CH 3 COO) 2 containing a component of NH 4 CH 3 COO. This ion-exchange method has unique ch…
Abstract Environmentally friendly polymeric biocomposites based on whey powder, a waste material of the dairy industry, and fully or partially hydrolyzed poly (vinyl alcohol) were prepared and characterized with optical microscopy, Fourier transform infrared spectroscopy, differential scanning calorimetry, and stress–…
Abstract One‐dimensional high‐quality CdS/poly(ethylene oxide) (PEO) hybrid nanoparticle‐polymer fibers were fabricated by an electrospinning method, followed by self‐assemble technologies with co‐fed H 2 S atmosphere at 60 °C. The structural and spectral information of the resulting hybrid nanofibers was characterize…
The boson peak is an excess in the phonon density of states compared to the Debye model that appears in almost all glasses. It has been repeatedly measured in the bulk by a variety of methods, but its origin is still highly debated. Here we present first experimental evidence of the boson peak on the v-SiO2 surface. T…
Conducting Polypyrrole-lead titanate (PPy/PbTiO3) composites have been prepared by in situ deposition technique by placing different wt.% of fine grade powder of PbTiO3 (10, 20, 30, 40, and 50%) during polymerization of pyrrole. The composites formed were characterized by X-ray diffraction (XRD), scanning electron mic…
Grid-shaped and tree-shaped flow architectures are being generated for use in vascularized materials with multiple functionality (self-healing, self-cooling, etc), based on the principle of the constructal law of evolutionary increase of flow access through the generation of better flowing configurations (designs). He…
This paper is a theoretical and experimental study of the optical properties of binary aqueous suspensions containing metal nanoparticles (NPs) coated with charged organics. If all nanoparticles bear charges of the same polarity, the NPs do not aggregate, and the solutions are stable. Under these circumstances, optica…
Abstract A novel preservative film was prepared by blending konjac glucomannan (KGM) and poly (diallydimethylammonium chloride) (PDADMAC) in aqueous system. The effects of PDADMAC content on the miscibility, morphology, thermal stability, and mechanical properties of the blend films were investigated by density determ…
We have studied various ferroelectric liquid crystals to find the average molecular direction of the shortest axis in the perfectly unwound state by using tilted conoscopic measurements. We find that there exist two types of temperature dependencies of the biaxiality. Some materials exhibit increasing biaxiality while…
We prepared quinacridone (QA) nanoparticles with a mean size of 70 nm by nanosecond laser ablation of their microcrystalline powder dispersed in water, and assembled the nanoparticle colloid into a thin film on an electrode by electrophoretic deposition (EPD). The EPD film consists of closely packed QA nanoparticles a…
Abstract The aim of this study is to prepare flavone imprinted silica with good sphericity. Previous studies have demonstrated that imprinted silica can be synthesized using a simple sol‐gel method and a grinding‐sieving process. Despite the simplicity of the synthetic method, the appearance of the final product obtai…
In order to quantify the amounts of digitoxigenin and gitoxigenin in wild Sardinian Digitalis purpurea L. an easy extraction method and an high performance liquid chromatography (HPLC) analytical technique have been set up. The analyzed samples, stemming from six different locations, showed a great variability in glyc…
We experimentally and theoretically study the density-dependent optical properties of 20 nm gold nanoparticle monolayers on silicon at 530 nm. Both results indicate a density-dependent resonance behavior. The density-dependent resonance suggests that the optical properties of the gold nanoparticle monolayers can be dr…
Soy-based nanocomposites were synthesized using soy resin and montmorillonite clay. Two types of dispersion techniques, pneumatic and sonication, were carried out to disperse the nanoclay into the soy-based epoxy resin. Tensile testing of the nanocomposites showed that the nanoclay improved the modulus and the strengt…