Materials Literature
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This study reports the result of an investigation into the effects of chiral vector of carbon nanotubes (CNTs) and modulus of matrix on the interfacial stresses of CNT-reinforced composites. Based on the molecular structural mechanics approach, the assumption that CNTs and matrix are perfectly bonded to each other, an…
Abstract A new monomer, N,N ′‐bis(4‐phenoxybenzoyl)‐ p ‐phenylenediamine (BPBPPD), was prepared by the condensation of p ‐phenylenediamine with 4‐phenoxybenzoyl chloride in N,N ‐dimethylacetamide (DMAc). Novel aromatic poly(ether amide amide ether ketone ketone)s (PEAAEKKs) were synthesized by electrophilic Friedel–Cr…
Stellated Au/Ag nanoparticles have been synthesized in ascorbic acid in the presence of CTAB using Ag nanoparticles as seeding points. The composition of the materials obtained has been characterized by EDX. High-resolution transmission electron microscopy has been employed to analyze the structure of the nanoparticle…
ABSTRACT In this work, the addition of different amounts of chitosan during cheese making, combined with modified atmosphere packaging (MAP) was used to prolong the shelf life of stracciatella cheese. On the packaged cheese stored at 4C microbiological, pH, gas composition and sensorial changes were monitored over an…
We observe a seemingly complex magnetic field dependence of the dielectric constant of hexagonal YbMnO(3) near the spin ordering temperature. After rescaling, the data taken at different temperatures and magnetic fields collapse on a single curve describing the sharp anomaly in nonlinear magnetoelectric response at th…
Abstract UV‐curable fluorinated organic–inorganic hybrid coatings were prepared by the sol–gel technique. Perfluorinated urethane modified alkoxysilane was synthesized by the reaction between perfluoro alcohol and 3‐isocyanatopropyltrimethoxysilane. The prepared formulations were applied onto poly(methyl methacrylate)…
Polycrystalline samples of Ba(1-x)Sr(x)Fe(2)As(2) (0≤x≤1) and Ba(1-x)Sr(x)Fe(1.8)Co(0.2)As(2) (0≤x≤1) have been synthesized by a solid state reaction method. Structural analysis by means of x-ray diffraction shows that the lattice parameters and unit cell volume decrease monotonically with the increase of x for Ba(1-x…
Whereas encapsulation of functional groups at the core of dendrimers is well-understood, very little is known about their intermediate layers or even the periphery. Here we report on a systematic investigation of every layer of dendrimers by incorporating a single ferrocene unit in well-defined locations in dendrons.…
The aim of this study was to determine the optimal heat treatment conditions for enhancement of pressed silk-mediated 3D-like proliferation of normal human dermal fibroblasts, as well as to determine the responses to heat shock of cells and intracellular signaling pathways. The beginning of 3D-like pattern formation o…
Self-assembly of 5,10,15,20-tetra(4-pyridyl)porphyrin and trans-[Cu(hfacac)2(H2O)2] (hfacac = 1,1,1,5,5,5-hexafluoroacetylacetonate) including in situ Cu2+ metalation of the porphyrin core afforded a rhomboidally distorted (4,4)-net based polymeric 2D layer structure.
Demixing of two polymers (polystyrene and poly(2-vinylpyridine)) in solution was studied on a substrate with a surface energy pattern for varying relative humidities and gaseous atmospheres. A good pattern transfer of laser-generated surface energy patterns could only be observed at medium relative humidity. An incomp…
Multiform coated titanium implants are widely used in orthopedic and dental surgery. In this study, we have investigated the reactivity of pectin-coated titanium samples implanted under the latissimus dorsi-muscle fascia of rats. Samples were coated with two enzyme treated apple pectins; modified hairy regions (MHR-A…
One of the main challenges for introduction of a hydrogen-based economy is storage of hydrogen. Hydrogen storage in solid materials is considered among the most attractive methods. During recent years much emphasis has been placed on the synthesis of nanosized metals and alloys. In the present study Mg(BH4)(2) and Mg(…
Current–voltage (i-v) characteristics of dry poly(p-phenylenebenzobisthiazole) (PBZT) thin films are studied before and after various doping processes. Conductivity switching phenomenon is observed after doping with HCl and H2SO4 acidic solutions at different concentration levels. The conductivity is 10 folds higher i…
We studied the effect of Al doping in Zn(0.94)Co(0.05)Al(0.01)O nano-powders from the electronic structure point of view by applying x-ray absorption spectroscopy and resonant inelastic x-ray scattering at the oxygen K- and Co L-edges. The intensity of the pre-edge structure of the O-K XAS spectra is enhanced followin…
Abstract We investigated the spectral data of three carbon nanotube (CNT) species obtained by Raman spectroscopy and photoluminescence (PL) measurements. The corresponding relative signal intensities without further corrections yielded significantly different relative distributions of the CNT species. Theoretical calc…
Effects of adding manganese to Ag/H-BEA for selective catalytic reduction of NO(x) with propane (C(3)H(8)-SCR) were investigated under a lean-burn condition. Mn addition significantly promotes the catalytic performance of Ag/H-BEA below 673 K. A Ag-Mn/H-BEA catalyst with equal metal weight of 3 wt % has the highest ac…
Abstract Although boron doped multi‐walled nanotubes have been synthesized by chemical vapor deposition (CVD) methods, the synthesis of single‐walled species was achieved only recently. In comparison to their carbon counterparts synthesized by similar methods, these nanotubes grow in relatively low amounts due to seve…
(Ti,Zr,Hf)(Co,Pd)Sb half-Heusler bulk materials have been synthesized using a high-frequency induction melting method followed by the spark plasma sintering densification process. The thermoelectric transport properties have been investigated as a function of temperature. It is found that the electrical conductivity o…
The absorption and emission properties of Yb 3+ doped oxy-fluoride-silicate glasses prepared by the melt-quenching method have been investigated. Yb 3+ ions in the oxy-fluoride-silicate glasses show large absorption and emission cross-section and the fluorescence lifetimes are longer than 1.3 ms. The minimum pumping i…