Materials Literature
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Orb-weaving spiders spin five fibrous silks from differentiated glands that contain unique sets of proteins. Despite diverse ecological functions, the mechanical properties of most of these silks are not well characterized. Here, we quantify the mechanical performance of this toolkit of silks for the silver garden spi…
We report a novel approach for the controlled delivery of an antiinflammatory, chemopreventive drug by an enzyme-triggered drug release mechanism via the degradation of encapsulated hydrogels. The hydro- and organogelators are synthesized in high yields from renewable resources by using regioselective enzyme catalysis…
A multiphase-field model previously proposed by the authors is reformulated in a thermodynamically consistent form and extended to multicomponent systems. The phase-field and diffusion equations, derived from a free energy functional, are compared to those postulated in the previous model in the limit of a binary allo…
We calculate the mode-dependent transmission probability of massless Dirac fermions through an ideal strip of graphene (length L, width W, no impurities or defects) to obtain the conductance and shot noise as a function of Fermi energy. We find that the minimum conductivity of order e2/h at the Dirac point (when the e…
Abstract The study mainly investigates the improvement of the comparative tracking index (CTI) on brominated epoxy resins in a copper clad laminate. We compare the effects of the differences in structures of various epoxy resins on the CTI. In addition, on the basis of the proportion of inorganic fillers and type, we…
The phenylmethacrylamide monomer, 1‐(4‐methacrylamidophenyl)‐1‐(4‐nitrophenyl)prop‐1‐en‐3‐one (MPNP) containing a photosensitive group was synthesized by reacting 4‐nitrocinnamoylaniline with methacryloyl chloride in the presence of triethylamine at 0–5°C. The functional monomer, MPNP was polymerized in ethyl methyl k…
The magnetic properties of full Heusler alloy (Co(2/3)Fe(1/3))(3+x)Si(1-x)/GaAs(001) hybrid structures grown by molecular beam epitaxy have been investigated. The magnetic moment, the coercive field and the in-plane magnetic anisotropy of (Co(2/3)Fe(1/3))(3+x)Si(1-x) films with various Si compositions (-0.46≤x≤1) are…
Abstract Polymer blends based on styrene butadiene rubber and ethylene vinyl acetate (EVA) were prepared. The sorption and diffusion of four aliphatic hydrocarbons through the blends were investigated with temperatures of 26–56°C. Sulfur, dicumyl peroxide (DCP), and a mixed system consisting of sulfur and DCP (mixed)…
Abstract Hydroxyl‐terminated polybutadiene (HTPB)‐based allophanate–urethane networks were prepared by reacting HTPB with di‐isocyanates, such as toluene–di‐isocyanate (TDI), isophorone–di‐isocyanate (IPDI), and 4,4′‐di(socyanatocyclohexyl)methane (H 12 MDI) at stoichiometric ratios ( r ‐values) ranging from 1.0 to 1.…
Abstract The experimental investigation of the Selective Catalytic Reduction (SCR) of NO x with NH 3 in a Simulated Moving Bed (SMB) reactor realized by means of a network of three catalyst beds with periodical variation of the feed position is dealt with. The influence of the main operating parameters, namely, the in…
Abstract Chitosan was graft copolymerized with HEMA (2‐Hydroxyethylmethacrylate) for the development of blood‐compatible dialysis membranes. The permeation characteristics of HEMA‐grafted chitosan films for four different solutes creatinine, urea, glucose, and albumin was studied in vitro at 37°C for assessment of the…
We report on the pressure effects on the orbital polaron lattice in the lightly doped manganites ${\mathrm{La}}_{1\ensuremath{-}x}{\mathrm{Sr}}_{x}{\mathrm{MnO}}_{3}$, with $x\ensuremath{\sim}1∕8$. The dependence of the orbital polaron lattice on negative chemical pressure is studied by substituting Pr for La in $({\m…
The object of this study is the examination of micro-mechanical calculation models for the determination of stiffness and impact resistance of a fibre-reinforced epoxy-single-layer-composite. Cotton, ramie and man-made lyocell fibres were used in this work. In the calculation of the elasticity module it turned out tha…
We investigate an optically induced distributed-feedback cavity, containing a densely packed luminescent silicon nanocrystal layer in a SiO2 based matrix as active medium. In the presence of optical feedback, we have observed a nonlinear increase in the spectrally resolved emission intensity on the blue emission wing,…
The present work deals with the study of the effect of the interfaces on the thermal and mechanical behavior of a composite based on polypropylene and calcium carbonate that was treated with bifunctional coupling agents. In order to enhance the coupling of the filler and the polymer, a compatibilizer, namely maleic an…
Aniline (ANI) was polymerized under inert atmosphere in the presence and absence of natural clay initiated by peroxydisulphate (PDS) in an aqueous acidic medium. While increasing the amount of clay the rate of polymerization (Rp) was decreased and showed first order dependence with respect to amount of clay. The % yie…
The ferroelectric domain structure of single crystalline Pb5Ge3O11 was inspected and manipulated using piezoresponse force microscopy (PFM) and Kelvin probe force microscopy (KPFM). The irregularly shaped three-dimensional maze reflecting the as-grown domain structure on the micron and submicron scale was resolved wit…
Neutron reflection was used to measure the buildup of layers at a solid surface as the smectic phase is approached from higher temperatures in a nematic liquid crystal. The liquid crystal was 4-octyl-4'-cyanobiphenyl (8CB), and the solid was silicon with one of five different surface treatments that induce homeotropic…
ABSTRACT Virtual tensile experiments on cylindrical copper wires of nanometric diameter were carried out using molecular dynamics techniques based on the embedded‐atom method. Transverse, atomically sharp surface cracks with circular fronts of different depths are introduced to evaluate their effect on the mechanical…
Considerable interest has developed in the potential use of II--VI oxides as electronic and optical materials. In several cases, alkali atoms have been suggested as dopants. We report on the theoretical and experimental investigation of infrared and vibrational properties of a Li-OH complex in ZnO. Earlier infrared ex…