Materials Literature
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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…
Abstract Potassium (K + ) directly released from primary K‐bearing minerals can contribute to plant nutrition. The objective of this research was to assess short‐term K + release and fixation on a range of intensively cropped calcareous soils. Potassium sorption and desorption properties and the contributions of excha…
Abstract Six‐arm and twelve‐arm star polymers have been synthesized by ATRP on the template of first‐ and second‐generation polyphenylene dendrimers. Star polymers with amphiphilic double‐shell of hydrophilic HEMA and styrene were also synthesized and their behavior toward different solvents was studied. The results s…
Abstract ε‐caprolactone was polymerized in the presence of neat montmorillonite or organomontmorillonites to obtain a variety of poly(ε‐caprolactone) (PCL)‐based systems loaded with 10 wt % of the silicates. The materials were thoroughly investigated by different X‐ray scattering techniques to determine factors affect…
We show that with an appropriate surface modification, a slab of photonic crystal can be made to allow wave transmission within the photonic band gap. Furthermore, negative refraction and all-angle negative refraction (AANR) can be achieved by this surface modification in frequency windows that were not realized befor…
Abstract A model experiment on the plasma deposition of TiO 2 on silver is described which can help to identify the factors that control the formation of supported Ag@TiO 2 nanofibers during plasma deposition of TiO 2 at T > 130 °C. The plasma oxidation of silver and the plasma deposition of TiO 2 on dispersed meta…
In the phase diagram of the protein hen egg-white lysozyme, a region is present in which the lysozyme solution demixes and forms two liquid phases. In situ observations by optical microscopy show that the dense liquid droplets dissolve when crystals grow in this system. During this process the demixed liquid region re…
We investigate p-type doping in ZnO prepared by metal-organic chemical vapour deposition with dimethylhydrazine (DMHy) as the nitrogen dopant source. Results obtained by x-ray photoelectron spectroscopy show that DMHy exhibits a narrow temperature window from 500 to 550 °C for efficient nitrogen incorporation and that…
Abstract Calcium carbonate/low‐density‐polyethylene (LDPE) nanocomposites have been prepared by melting blend with twin‐screw extruder. The mechanical properties of composites and the dispersion of the nanoparticles were studied. The reinforcement mechanism was discussed. The results show that not only the tensile pro…
Abstract The water uptake behavior of biodegradable layered silicate/starch–polycaprolactone blend nanocomposites was evaluated. Three different commercial layered silicates (Cloisite Na + , Cloisite 30B and Cloisite 10A) were used as reinforcement nanofillers. Tests were carried out in two different environments: 60…
We present results of our theoretical study of the effect of surface passivation on structural, electronic, and optical properties of stoichiometric ${\mathrm{Zn}}_{n}{\mathrm{Se}}_{n}$ clusters. The effects of -H and -OH passivation on the electronic and optical properties of the clusters are calculated and are compa…
Particleboard is one of the most important wood-based panel products on the market. The objectives of this study are to investigate the relationship between the density profile and some technological properties of particleboard and to determine the influences of press type, cold and hot press pressures, moisture conte…
Abstract To improve the patternability and adhesion of poly(3,4‐ethylenedioxythiophene) (PEDOT) nanofilm to an SiO 2 surface, an oxidized silicon wafer substrate was microcontact printed with an octadecyltrichlorosilane (OTS) monolayer, and subsequently its negative pattern was self‐assembled with (3‐aminopropyl)trime…