Materials Literature
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Abstract A series of bioplastics from isolated soy protein (SPI) and chitin (CH) was prepared with glycerol as a plasticizer by blending and compression molding. Their morphology and properties were investigated by wide‐angle X‐ray diffraction (WAXD), differential scanning calorimetry (DSC), dynamical mechanical therm…
Abstract A new type of synthetic pathway—the use of interpenetrating polymer networks (IPNs)—is proposed to design conducting polymer‐based actuators. Two types of materials with interesting conducting properties were prepared: (1) a semi‐IPN between poly(3,4‐ethylenedioxythiophene) (PEDOT) and branched poly(ethylene…
ADVERTISEMENT RETURN TO ISSUEPREVNoteNEXTα-Cyclodextrin-Enhanced Crystallization of Poly(3-hydroxybutyrate)Yong He and Yoshio InoueView Author Information Department of Biomolecular Engineering, Tokyo Institute of Technology, Nagatsuta 4259, Midori-ku, Yokohama 226-8501, Japan Cite this: Biomacromolecules 2003, 4, 6,…
Evidence is presented here that cupric ions play a part in the natural spinning of Bombyx mori silk. Proton induced X-ray emission studies revealed that the copper content increased from the posterior part to the anterior part of silk gland, and then further increased in the silk fiber. Spectrophotometric analysis dem…
Abstract The use of untreated sawdust as a filler in poly(vinyl chloride) (PVC) was examined—the effects of sawdust content on structural and thermal changes, and rheological and mechanical properties being of main interest. The results revealed that the torque and die entrance pressure drop values during mixing were…
Abstract Several modified poly(vinyl alcohol) (PVA) systems with various plasticizers were prepared and their melt‐processing was successfully realized. This paper focuses on the study of the evaporation behaviour of water in these modified PVA systems, exploring its plasticizing mechanism by using differential scanni…
Mechanical properties of polyelectrolyte multilayer thin films were studied by nanoindentation experiments using an atomic force microscope. We obtained force−distance measurements for a model polycation/polyanion multilayer system, poly(allylamine hydrochloride) (PAH), and an azobenzene-containing polyelectrolyte (P-…
Fed up with cleaning dusty windows, soiled shoes, and dirty paintwork? A series of products are now emerging on the market that claim to have self-cleaning surfaces, apparently removing the need for regular washing, scrubbing, and polishing with chemical agents. But consumers should refrain from throwing away all thei…
Abstract The apparent tensile strength of technical flax fibers was determined in single‐fiber tests at various clamping lengths (20, 40, and 80 mm) and the outcome was compared with literature data. It was demonstrated that the strength of flax at each clamping length obeyed the two‐parameter Weibull model. The failu…
Abstract In this study, the macroporous poly( L ‐lactide) (PLLA) cell scaffold was modified for enhancing its cell affinity by an improved surface‐treating medium, a mixture of aqueous 0.25 M NaOH/ethanol. Ethanol was applied as a co‐treating medium to wet the polylactone and assist the hydroxide nucleophilic attack o…
The electron paramagnetic resonance (EPR) study of $\ensuremath{\beta}\ensuremath{-}{\mathrm{Ga}}_{2}{\mathrm{O}}_{3}$ crystals gives evidence that donors can be regarded as ${\mathrm{O}}^{2\ensuremath{-}}$ vacancies trapping single electrons. The Lorentzian line shape of the EPR spectra observed in the range of 5--30…
A robust and efficient frequency dependent and non-local exchange-correlation $f_{xc}(r,r';ω)$ is derived by imposing time-dependent density-functional theory (TDDFT) to reproduce the many-body diagrammatic expansion of the Bethe-Salpeter polarization function. As an illustration, we compute the optical spectra of LiF…
The continued increase in areal densities in magnetic recording makes it crucial to understand magnetization reversal in nanoparticles. We present finite-temperature micromagnetic simulations of hysteresis in Fe nanopillars with the long axis tilted at angles from 0 degrees to 90 degrees to the applied sinusoidal fiel…
Fluoride glasses BaMnMF7 (M = Fe, V, assuming isomorphous replacement) have been structurally modelled. The neutron patterns were simulated by the reverse Monte Carlo (RMC) and the Rietveld for disordered materials (RDM) methods. The best fit is obtained from one of the seven tested crystalline models : the BaMnGaF7 s…
Hysteresis curves for finite arrays of $N\times N$ ferromagnetic nano dots subject to the dipole-dipole interaction are investigated for $N=2... 13$. Spin arrangements up to N=6 are presented, which indicate the onset of bulk-like behavior associated with odd (N=5) and even (N=6) systems. The effect of field misalignm…
To help understand the high activity of silver as an oxidation catalyst, e.g., for the oxidation of ethylene to epoxide and the dehydrogenation of methanol to formaldehyde, the interaction and stability of many different oxygen species at the Ag(111) surface has been studied for a wide range of coverages. Through calc…
A. M. Tishin and Y. I. Spichkin Institute of Physics (2003), 480 pp. ISBN: 0-750-30922-9 $135 / $90 / €135
Under ambient light illumination, silver nanoparticles can be synthesized by a triblock copolymer induced reduction of [Ag(NH 3 ) 2 ] + ions in ethanol. Conventional chemical reducing agents, thermal treatment, and radiation sources are no longer necessary in this novel approach. A possible mechanism was proposed to e…
Long-chain polymer-assisted growth of one-dimensional (1D) nanostructures has been investigated in previous research. This kind mild method has lots of merits such as not requiring complex procedures, without template supporting etc. Can the short-chain polymer also be used to grow long nanowires? In the present work,…
We use light to transform a colloidal solution of spherical silver nanoparticles into larger nanoparticles of a different shape. The particle size and shape can be controlled by choosing the wavelength(s) of light used to drive the photochemical growth. These findings suggest a new way of thinking about growth of nano…