Materials Literature
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A novel water/glycerol/polyvinylpyrrolidone (PVP) ternary system is developed to realize the successful growth of PbS nanocubes with a narrow size distribution and sharp facets and edges using a one-step synthesis at room temperature for the first time. The synthesis is very fast, high yield, environment-friendly, and…
The synthesis of mesomorphic Cu(II) and Ni(II) coordination compounds arising from a new series of tetradentate Schiff bases containing two salicylaldimine fragments connected by a very long spacer,-(CH2)12-, (H2Ln): L1 = p-(C6H13O)-C6H4COO, L2 = p-(C12H25O)-C6H4COO, is described. The self-assembly and liquid-crystall…
This paper reports a study on the effect of support thermal treatment on the activity of gold-based catalysts for the total oxidation of propene. Ce 0.3 Ti 0.7 O 2 supports were prepared using sol–gel method. These compounds are calcined at 400, 500 and 600 °C. Physico-chemical properties of synthesized materials were…
Part 1 Biomimetic principles, production and properties: Recombinant DNA methods applied to the production of protein-based fibers as biomaterials Purification of protein solutions Spinning of fibers from protein solutions Biomimetic principles of spider silk for high-performance fibers A Biomimetic approach to the pr…
The growth thermodynamics of nanoscaled α-Al 2 O 3 crystallites after its formation from θ-Al 2 O 3 phase transition by thermal treatment was examined. The crystallite growth characterized with quantized size increments can be performed through coalescence processes. The α-Al 2 O 3 nuclei with sizes 17−20 nm ( d cα )…
We analyze the diffraction characteristics of dielectric gratings that feature a high index grating layer, and devise, through rigorous numerical calculations, large bandwidth, highly efficient, high dispersion dielectric gratings in reflection, transmission, and immersed transmission geometry. A dielectric TIR gratin…
Recent work using atomistic simulations on a number of different oxide and mineral interfaces is described. Static simulation techniques have been applied to gadolinium doped ceria grain boundaries and show that there is marked variation in oxygen vacancy and dopant segregation with depth and orientation of a number o…
We have studied the structure and phase behaviour of spherical nanoparticles grafted with a modest number of polymer tethers in the dense suspension and pure melt states, and dissolved in a homopolymer matrix, using the polymer reference interaction site model integral equation theory. In the absence of a polymer matr…
Abstract Castor oil was transesterified with pentaerythritol thereby introducing reactive hydroxyl groups. The method of matrix‐assisted laser desorption/ionization time‐of‐flight mass spectroscopy was used to determine the components of the castor oil pentaerythritol alcoholysis products. Simultaneous interpenetratin…
Micro/nano-encapsulation technologies have the potential to meet food industry challenges concerning the effective delivery of health functional ingredients and controlled release of flavor compounds. The inherent complexity of food systems has translated into an intensive search for novel functional shell materials.…
We investigated the low energy excitations in NdMnO(3) in the µeV range by a backscattering neutron spectrometer. The energy spectra on polycrystalline NdMnO(3) samples revealed inelastic peaks at E = 2.15 ± 0.01 µeV at T = 2 K on both energy gain and energy loss sides. The inelastic peaks move gradually towards lower…
This paper reports a chemical approach for obtaining a silica-rich nanolayer on the surface of a vanadium-bearing silicate glass. The approach involves depletion of earth alkaline ions (Mg 2+ and Ca 2+ ) from the glass surface by means of inward diffusion of those ions, i.e., diffusion from the surface to the interior…
Using the real-space implemented self-consistent field theory, we undertook an investigation on the hierarchical self-assembly behaviors of comb-coil block copolymers. The comb-coil block copolymers can self-assemble into hierarchical microstructures with two different length scales. Various structure-within-structure…
First-principles calculations using the $\text{APW}+\text{lo}$ method, as implemented in the WIEN2K code, have been used to investigate the structural, electronic, and magnetic properties of the perovskite ${\text{CaCu}}_{3}{\text{Fe}}_{4}{\text{O}}_{12}$, including the high-temperature $Im\text{\ensuremath{-}}3$ and…
Abstract The aim of this study is to characterize thermoplastic elastomers (TPEs) from polypropylene and natural rubber with and without phenolic resin as a vulcanizing agent. The blends containing 40–60 wt % of polypropylene were mixed in an internal mixer and pressed with a compression molding machine. TPEs without…
Abstract Hydrotalcites of formula Mg 6 (Al,Fe) 2 (OH) 16 (CO 3 )·4H 2 O formed by intercalation with the carbonate anion as a function of divalent/trivalent cationic ratio have been successfully synthesised. The XRD patterns show variation in the d‐spacing attributed to the size of the cation. Raman and infrared bands…
Solid cetyltrimethylammonium bromide (CTAB) and polyethylenimine (PEI) films self-assemble at the air/water interface. Small angle X-ray scattering (SAXS) measurements show that dried films maintain the same ordered mesostructure as the films at the air/water interface, and here the effects of PEI concentration and cr…
Superconductivity was achieved in PrFeAsO by partially substituting ${\text{Pr}}^{3+}$ with ${\text{Sr}}^{2+}$. The electrical transport properties and structure of this superconductor ${\text{Pr}}_{1\ensuremath{-}x}{\text{Sr}}_{x}\text{FeAsO}$ at different doping levels $(x=0.05\ensuremath{\sim}0.25)$ were investigat…
A new composite consisting of ZnO nanorods decorated with Ag(2)O nanoparticles has been synthesized and characterized. It is found that the band gap emission of ZnO nanorods can be greatly enhanced by about 10 times, while the defect emission can be suppressed to the detection limit, simultaneously. The ratio between…
The adsorption of a modified polyacrylamide on gold surfaces coated with varying proportions of -CH3- and -OH-terminated alkanethiols (producing substrates of varying hydrophobicity: thetac=75, 98, and 119 degrees), was investigated using quartz crystal microbalance with dissipation (QCM-D), tapping-mode atomic force…