Materials Literature
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(TMTTF)2AsF6 and (TMTTF)2SbF6 are both known to undergo a charge ordering phase transition, though their ground states are different. The ground state of the first is Spin-Peierls, and the second is an antiferromagnet. We study the effect of pressure on the ground states and the charge-ordering using 13C NMR spectrosc…
Abstract A mild chemical reduction method was developed to synthesize selenium nanoparticles. The observation of the particle growth within a five‐minute time frame at an elevated temperature is achieved, and it was evidenced by analyzing the particle sizes from electron micrographs. The samples at individual growth s…
To decrease light reflection from the surface of cathode-ray tube (CRT) and liquid crystal display (LCD), anti reflection (AR) technology has been investigated. In this work, we demonstrate the use of high-quality two-layer AR films (luminous reflection under 1.0) using numerous micropores to create a low-refractive-i…
Colloidal silica (SiO2) is perhaps the most undesirable inorganic deposit formed in process cooling waters, especially on metallic surfaces such as heat exchangers or pipelines. Conventional mineral scale inhibitors do not inhibit its formation. Chemical cleaning is difficult and not free of hazards. Research on silic…
To confirm the applicability of thermally induced ultrasonic emission from nanocrystalline silicon (nc-Si) devices as radiation pressure generators, the dynamic response has been investigated under a pulse operation mode. The nc-Si emitter is fabricated on a p-type Si wafer by conventional electrochemical anodization…
Abstract Polarized Raman and IR spectra were obtained for Ca 4 GdO(BO 3 ) 3 crystal at ambient temperature. The assignment of the observed bands to the respective internal and external phonons is proposed on the basis of lattice dynamics calculations. This study also shows that significant LO–TO splitting exists for s…
The Taguchi design of experiments was used to test the relative importance of medium components and environmental factors on poly(β-hydroxybutyrate)(PHB) production by Ralstonia eutropha. The optimum condition was obtained as: fructose concentration, 15 g/L; C/N ratio, 7.4; agitation speed 200 rpm; culture time, 40 h;…
Abstract At present, there are intensive research efforts towards intermediate temperature solid oxide fuel cells (IT‐SOFCs) with a thin film electrolyte and electrode. In view of the nature of molecular level reaction and the great potential of CVD processes for IT‐SOFCs and even Micro‐SOFC fabrication, various novel…
Abstract A reduced nonlinear model of a planar molten carbonate fuel cell is presented. The model is derived from a spatially distributed dynamic model of the cell by applying the Karhunen Loève Galerkin procedure. The reduced model is of considerably lower order than the original one and requires much less computatio…
Archaeal dehydrogenases are often found to be of a specific class of dehydrogenase which has low sequence identity to the equivalent bacterial and eukaryotic counterparts. This paper focuses on two different types of hyperthermophilic dehydrogenase enzyme that have been cloned and over-expressed in Escherichia coli. T…
By anodizing an aluminum surface that has been patterned with different guiding lattices using a focused ion beam, the resulting anodic alumina nanochannel arrays exhibit different degree of order arrangement. Long-range order is achieved only when the guiding lattice is carefully matched to that of the self-organized…
Densification and grain growth of alumina were studied with yttria or yttrium‐aluminum garnet (YAG) additives at the relatively low temperatures of 1200°–1300°C. Yttria doping was found to inhibit densification and grain growth of alumina at 1200°C and, depending on dopant level, had a lesser effect at 1300°C. At 1200…
The growth and characterization of single grains of the primitive icosahedral quasicrystal R–Mg–Cd (R=Y, Gd, Tb or Dy) are described. From the thermodynamic properties, it is confirmed that the system is a spin glass exhibiting the characteristic spin-freezing transition of such systems. There is no evidence for two d…
A brief review is presented of recent results derived from the random field theory approach to describing relaxor ferroelectric properties. The key point in this approach is that the random field originating f rom chemical disorder of relaxor ferroelectrics destroys long range polar order, which could otherwise exist…
The stabilization of the n = 3 member of the Ruddlesden−Popper series has been investigated in the Sr−Nd−Fe−O system. A new series of phases closely derived from RP-type structures has been synthesized and characterized by X-ray diffraction and electron microscopy. The control of the oxygen stoichiometry first allowed…
We studied the magnetic and electronic properties of the insulating charge-transfer salt (TMTTF) 2 AsF 6 by electron spin resonance (ESR), SQUID magnetometer and optical conductivity measurements. For the first time, the lattice dynamics was investigated in the vicinity of the charge order transition. We found a split…
Realizations of double negative (DNG) metamaterials using lumped element representations of lossless and lossy transmission lines are reported. Double negative media are artificial materials in which the permittivity and permeability are both negative. Analytical and numerical results for a variety of transmission lin…
The results of polishing (using suspensions of nanodiamonds (NDs) produced by detonation synthesis at different plants) of the surfaces of 23 solid materials having different chemical compositions, production processes, structure, electronic properties, hardness, reactivity, and application are described. Atomic force…
Lanthanum‐doped lead zirconate stannate titanate ceramics were successfully compacted to full density by spark plasma sintering (SPS). SPS samples densified at 900° or 950°C exhibit nearly full density and fine grain size (about 300 nm). Compared with samples from conventional sintering (CS), SPS samples show larger p…
The effect of selective inhibition of nanodiamond oxidation upon heating of detonation carbon in air is used to extract nanodiamonds from the detonation products. The methods for cleaning nanodiamonds from nondiamond carbon modifications are described depending on the synthesis conditions.