Materials Literature
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Abstract Solid polymer membranes from poly(vinyl alcohol) (PVA) and poly(acrylamide‐co‐acrylic acid) (PAA) with varying doping ratios of sorbitol were prepared using the solution casting method. The films were examined with Fourier transform infrared spectroscopy, thermogravimetric analysis, differential scanning calo…
A reduced dynamics representation is introduced which is tailored to a hierarchical, Mori-chain type representation of a bath of harmonic oscillators which are linearly coupled to a subsystem. We consider a spin-boson system where a single effective mode is constructed so as to absorb all system-environment interactio…
We study theoretically, using a quantum-mechanical approach, the general scattering problem of a straight step defect on the surface of the topological insulator ${\mathrm{Bi}}_{2}{\mathrm{Te}}_{3}$ with a strong warping effect. At high energy where the warping effect is large, an electron incident on a step defect ru…
Abstract The semi‐interpenetrating polymer network technique was applied in the preparation of anion exchange membranes for direct methanol fuel cells (DMFCs). Poly(vinyl alcohol) was chosen as the polymer matrix and quaternized polyethyleneimine was used as the cationic polyelectrolyte. To modify the polymer membrane…
Surfaces with high reactivity usually have a low area percentage, which greatly limits the efficiency of surface reactivity. In this Letter we demonstrate a generic way of increasing the percentage of the highly reactive surface by using external strain. Bulk and surface elastic properties of TiO2 are studied via dens…
We succeeded in growing single crystals of LaNiC 2 with the non-centrosymmetric orthorhombic structure by the Czochralski method, and measured the electrical resistivity, de Haas–van Alphen effect, and specific heat to clarify the Fermi surface and superconducting properties. This compound has been studied from a view…
Abstract In order to achieve a balanced development in the application of materials for structural or functional purposes, one of the priority objectives of future work is to achieve the goal of “zero waste” in the different production lines. As would be expected from what was agreed in the Kyoto Protocol and the meet…
This paper deals with the development of functional geopolymers based on local resources such as kaolinitic soil and zeolitic tuff for the construction of water storage containers and water transfer channels. The effect of water content on the mechanical performance and physical properties of synthesized geopolymers w…
We have fabricated porous membranes using a parylene encapsulated vertically aligned forest of multi-walled carbon nanotubes (MWCNTs, about 7 nm inner diameter). The transport of charged particles in electrolyte through these membranes was studied by applying electric field and pressure. Under an electric field in the…
A class of nanoplasmonic loaded slot cavities composed of a silver nanorod placed in the center of a metal-insulator-metal slot cavity is introduced. Based on the nanocircuit concepts and transmission-line theory, a circuit model for the loaded structure is proposed. The numerical results together with the theoretical…
We present a theoretical analysis on the applicability of Vegard's linear rule in In${}_{x}$Al${}_{1\ensuremath{-}x}$N alloys in relation to strain related elastic and piezoelectric properties. We derive the elastic stiffness constants and biaxial coefficients, as well as the respective deviations from linearity (Vega…
We have examined the effects of crystallization kinetics of poly(3-hexylthiophene) and poly[2,5-bis(3-hexadecylthiophen-2-yl)thieno(3,2-b)thiophene] on microstructure and charge transport. Rapid crystallization increases the density of tie molecules in polythiophenes. As a consequence, ordered regions are better conne…
Modelling polymers with side chains is always a challenge once the degrees of freedom are very high. In this study, we present a successful methodology to model poly[2-methoxy-5-(2′-ethyl-hexyloxy)-p-phenylenevinylene] (MEH-PPV) and poly[3-hexylthiophene] (P3HT) in solutions, taking into account the influence of side…
Modern theories in crystal plasticity are based on a multiplicativedecomposition of the deformation gradient into an elastic and a plastic part.The free energy of the associated variational problems is given by thesum of an elastic and a plastic energy. For a model with one slip systemin a three-dimensional setting it…
A rheological mechanism of long-term self-assembly induced by H 2 O molecules is highlighted for layered saponite nanoparticles based on the results of thermogravimetry and differential thermal analysis, time-resolved length change measurement with high-resolution dilatometry, solid-state nuclear magnetic resonance, p…
A Si- p-channel metal-oxide-semiconductor field-effect transistor (PMOSFET)-like LED has been developed for light emission modulation. In contrast to a two-terminal Si-diode LED modulated by current signal, a major advantage of this three-terminal Si-PMOSFET LED is that the optical intensity modulation can be controll…
The dynamics of tracers in disordered matrices is of interest in a number of diverse areas of physics such as the biophysics of crowding in cells and cell membranes, and the diffusion of fluids in porous media. To a good approximation the matrices can be modeled as a collection of spatially frozen particles. In this L…
The majority of building blocks in self-assembled capsules feature high symmetry. Reducing this symmetry inevitably leads to expanded possibilities for isomerism. Here, we report a deep cavitand host with one short and three long walls. Its dimerization to hydrogen-bonded capsules in the presence of suitable guest mol…
Abstract A direct synthetic method for producing oxazoline‐fused fullerenes, that is, fullerooxazoles, from [60] fullerene and readily available carboxamides by radical pathways has been developed. The method presented allows efficient access to a variety of fullerooxazoles with high functional compatibility under mil…
We report the discovery of new polymorphic forms of solids by exploiting a solid-state NMR technique that has been developed for in situ monitoring of the evolution of crystallization processes. The capability of the technique to reveal the existence of new polymorphic forms of molecular solids is illustrated by the d…