Materials Literature
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A study of the field emission characteristics of novel structures of ZnO, namely marigolds, multipods and microbelts, has been carried out in both the close proximity configuration and the conventional field emission microscope. The use of a conventional field emission microscope overcomes the drawback of arc formatio…
Lighting the way: Through the combination of a UV-grafting process with the photoresponsive properties of spiropyran molecules, an optically reversible switching membrane surface was developed. This process can be used in preference to inducing physical movement of long-chain SAMs toward an electrode and as a result i…
Taking the high road: The unification of azide and hmp− (hmpH=2-(hydroxymethyl)pyridine) ligands has provided a route to two salts of a new Mn10 cation with an aesthetically pleasing, high-symmetry structure. The cation (see excerpt of structure; MnII yellow, MnIII blue, O red, N green, C gray) is completely ferromagn…
Diarylethene derivatives with hexaethylene glycol side chains were synthesized and their self-assembling and photochromic reactivity were investigated. The diarylethenes showed photochromism in organic solvents and even in water. The aqueous solution of the compounds turned turbid quickly upon heating. The clouding be…
Considerable efforts are being taken worldwide to utilize local natural waste and by-product materials in making concrete, such as silica fume (SF) or rice husk ash (RHA) as supplementary cementing materials to improve concrete properties (durability, strength, etc.). The effect of using SF or RHA as a partial replace…
The influence of random interlayer exchange on the phase states of the simplest magnetic heterostructure consisting of two ferromagnetic Ising layers with large interaction radius is studied. It is shown that such system can exist in three magnetic phases: ferromagnetic, antiferromagnetic and ferrimagnetic. The possib…
We have recently proposed an efficient computation method for the frictionless linear elastic axisymmetric contact of coated bodies [A. Perriot and E. Barthel, J. Mat. Res. 19 (2004) 600]. Here we give a brief description of the approach. We also discuss implications of the results for the instrumented indentation dat…
We analyze in details the atomistic response of a model amorphous material submitted to plastic shear in the athermal, quasistatic limit. After a linear stress-strain behavior, the system undergoes a noisy plastic flow. We show that the plastic flow is spatially heterogeneous. Two kinds of plastic events occur in the…
We report the synthesis, crystal structure, and magnetic properties of the $S=1$ 2-leg spin-ladder compound ${\mathrm{Na}}_{2}{\mathrm{Ni}}_{2}{({\mathrm{C}}_{2}{\mathrm{O}}_{4})}_{3}{({\mathrm{H}}_{2}\mathrm{O})}_{2}$. The magnetic properties were examined by magnetic susceptibility and pulsed high field magnetizatio…
The Exact-Exchange (EXX) Kohn-Sham formalism, which treats exchange interactions exactly within density-functional theory, is applied to one-dimensional periodic systems. The underlying implementation does not rely on specific symmetries of the considered system and can be applied to any kind of periodic structure in…
The paper is an overview of recent results of Li limiter testing in T-11M tokamak. The lithium limiter is based on the capillary-pore system (CPS) concept. The Li erosion process and deuterium (D 2 ) and helium (He) sorption by Li first wall were investigated. The ability of capillary forces to confine the liquid Li i…
Control over supramolecular assemblies of donor and acceptor arrays in nanoscale dimension that facilitate efficient energy transfer resulting in tunable emission is an outstanding challenge. In pursuit of this goal, we have designed a supramolecular donor-acceptor organogel with tunable emission from green to red thr…
Explicit expressions for the behavior of statistically isotropic composites with viscoelastic matrices and linear elastic inclusions are determined by application of the correspondence principle. The behavior of the matrix is linear in dilatation and governed by the standard linear model in shear. We demonstrate that…
We analyze the effect of microscopic disorder on the macroscopic properties of composite metamaterials and study how weak statistically independent fluctuations of the parameters of the structure elements can modify their collective magnetic response and left-handed properties. We demonstrate that even a weak microsco…
Superluminal phenomena have been reported in many experiments of electromagnetic wave propagation, where the superluminal behaviors of evanescent waves are the most interesting ones with the important physical significances. Consider that evanescent waves are related to the near-zone fields of electromagnetic sources,…
This article presents a review of the recent development of mixed conducting ceramic materials and membranes, and their potential applications in separations and chemical reactions. A basic knowledge of the materials, including their structure, composition, and properties, is first introduced briefly, followed by a sh…
Zinc oxide flower-like bunches were directly synthesized on indium-doped tin oxide (ITO) glass substrates through a simple chemical bath deposition process. By adjusting precursor concentration, other morphologies (spindles and rods) were also obtained. All of them are hexagonal and single crystalline in nature and gr…
The catalytic mechanisms of transition-metal compounds during the hydrogen sorption reaction of magnesium-based hydrides were investigated through relevant experiments. Catalytic activity was found to be influenced by four distinct physico-thermodynamic properties of the transition-metal compound: a high number of str…
Superhydrophobic surfaces as well as low adhesion and friction are desirable for various industrial applications. Certain plant leaves are known to be hydrophobic in nature due to their roughness and the presence of a thin wax film on the surface of the leaf. The purpose of this study is to fully characterize the leaf…
A comprehensive analysis is presented for the acid-base double-exchange reaction as well as the associated acid-displacement and base-displacement "half-reactions" with the goal of elucidating the meaning of the hard/soft acid/base (HSAB) principle and the conditions for its validity. When electron-transfer effects ar…