Materials Literature
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A brief review is given of electronic and transport properties of carbon nanotubes obtained mainly in a k · p scheme. The topics include a giant Aharonov–Bohm effect on the band gap and a Landau-level formation in magnetic fields, magnetic properties, interaction effects on the band structure, optical absorption spect…
An overview of the wide range of nanoreactors that have been constructed from synthetic and biological building blocks using both covalent and noncovalent approaches is given. Focus is on self-assembled systems, varying in size from a few nanometers to tens of micrometers. The review is divided into several sections t…
Applications of nanotechnology for treatment, diagnosis, monitoring, and control of biological systems has recently been referred to as "nanomedicine" by the National Institutes of Health. Research into the rational delivery and targeting of pharmaceutical, therapeutic, and diagnostic agents is at the forefront of pro…
Abstract The electrical conductivity and conductivity relaxation of x K 2 O–(100– x )TeO 2 glasses have been investigation in the frequency range 40 Hz to 200 kHz and temperature range 300 to 473 K. From the density and molar volume, it may be noticed that with increasing K 2 O content the density decreases while the…
This paper provides some experimental investigation on the influence of the surface roughness on the flashover performance of ceramics in vacuum. The test samples were prepared with four kinds of ceramics (99.9% Alumina) which were polished by four different SiC abrasives. The flashover performances of 20 kinds of tes…
Abstract The correlation between sizing formulation, bundle mechanical characteristics, and bundle–matrix static and dynamic interactions are investigated. Two glass‐fiber sizing formulations are considered, one containing polyvinyl acetate (PVAc) and the other polyester/PVAc, as conventionally used in sheet molding c…
The multivariate statistical method is introduced in this paper to diagnose insulation performance and identify its aging stages. Based on the lifetime model obtained by lifetime tests, a reasonable experimental condition is chosen to age several oil-paper samples for about 240 hours. Determination of partial discharg…
Radiation-induced damage during plasma processing of semiconductor materials can adversely affect device reliability. However, it has been shown that vacuum ultraviolet (VUV) radiation (8–20 eV) can beneficially deplete previously deposited charge on the surface of dielectrics by temporarily increasing their conductiv…
Abstract Summary: Pulsed‐IR laser‐induced decomposition of poly(vinyl acetate) (PVAC) differs remarkably from its conventional pyrolysis, which results in the formation of acetic acid and non‐polar carbonaceous residue. In contrast, the products in the former case are (i) vinyl acetate (low energy channel), (ii) produ…
Creep motion of the charge-density wave (CDW) and its change through optical excitation in the low-temperature plastic state of ${\mathrm{K}}_{0.3}{\mathrm{MoO}}_{3}$ is analyzed in terms of a local pinning theory. The nonlinear $I\text{\ensuremath{-}}V$ curve below the sliding threshold field can be well reproduced w…
Peter C. Junk * E-mail: peter.junk@sci.monash.edu.au a School of Chemistry, Monash University , Clayton, Vic, 3800, Australia Potassium tris(oxalato)ferrate(III) trihydrate crystallises in the monoclinic space group P21/c with a = 7.7422(10), b = 19.9168(10), c = 10.3457(10) Å, β = 107.846(10)°, V = 1518.5(3) Å3, for…
Abstract Ethylene vinyl alcohol (EVOH) copolymer is studied as a host for low concentrations, up to 1 wt%, of organically treated clay. The clay develops a high interaction level with EVOH and thus high torque levels accompany the structuring process leading to the formation of nanocomposites. Extrusion residence time…
Tetranuclear heterometallic complexes, [Tb2Zn2(Bzo)10(phen)2] (1) and [Tb2Zn2(TPA)10(phen)2] (2) ( , phen = 1,10-phenanthroline), were synthesized by the rheological phase reaction method and characterized by elemental analysis, IR and X-ray crystallography. Both complexes are tetrameric and the carboxylate ligands di…
Abstract ABA triblock copolymers of L ‐lactide (LL) and ε ‐caprolactone (CL), designated as PLL‐P(LL‐co‐CL)‐PLL, were synthesized via a two‐step ring‐opening polymerization in bulk using diethylene glycol and stannous octoate as the initiating system. In the first‐step reaction, an approximately 50:50 mol% P(LL‐co‐CL)…
In fcc crystals, dislocations are dissociated on the {111} glide plane into pairs of partial dislocations. Since each partial interacts individually with the Peierls potential and is coupled to its neighbour by a stacking fault, periodic variations in the separation distance d of the partials occur when dislocations r…
The electric-field-induced birefringence has been investigated by using a photoelastic modulator, with a view to obtaining a molecular model for the subphases produced by the frustration between ferroelectricity and antiferroelectricity in the chiral smectic liquid crystals. It has been found that even in the bulk, th…
Abstract The development of composites displaying electrical conductivity has attracted significant research attention over the last decade due to the possibility of new applications. For the first time, we describe the preparation of composites in which perlite particles have been combined with the well‐known conduct…
A sodium calcium borate, NaCaBO3, has been synthesized by the solid-state reaction method and the structure solved from X-ray powder diffraction data. The compound crystallizes in space group Pmmn and has a desired structure type containing isolated planar BO3(3-) anions. Mixed occupancy is found to exist in the Ca si…
Nanoscale particles of metals such as gold can interact with light by means of a plasmon resonance, even though they are much smaller than the wavelengths of visible light. The proportions of light that are absorbed and scattered vary with wavelength. Any light that is absorbed will cause heating of the particles, and…
This study uses molecular dynamics simulations performed in a parallel computing environment to investigate the adsorption of water molecules surrounding Au nanoparticles of various sizes. An observation of the oxygen and hydrogen atom distributions reveals that the adsorption of the water molecules creates two shell-…