Materials Literature
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In vitro bone marrow stromal cell (BMSC) growth may be enhanced through culture medium supplementation, mimicking the biochemical environment in which cells optimally proliferate and differentiate. We hypothesize that the sequential administration of growth factors to first proliferate and then differentiate BMSCs cul…
Individual carbon nanotubes (CNTs) often occur in randomly dispersed two-dimensional as well as three-dimensional configurations that make device fabrication difficult. Making electrical contact to such CNTs is of practical interest. To this end, we make contact to individual metallic single-walled carbon nanotubes (S…
M -plane and A -plane ZnO films were grown on M -plane and R -plane sapphire substrates respectively. At high growth temperatures and/or VI/II ratios, ZnO grew along the direction perpendicular to the c -axis. On the other hand, at low growth temperatures and/or VI/II ratios, ZnO grew along the c -axis direction. A ve…
A two-component multiblock copolymer with undecablock two of them on both chain ends are long and nine of them are short was successfully prepared by anionic polymerization using the six-step sequential monomer addition technique. Polymer components are polystyrene (S) and polyisoprene (I), its total molecular weight…
This article presents a review of the state of the art of materials used in spintronics. It is devoted to materials exhibiting novel and exciting electronic properties: manganites, double perovskites, spinel ferrites and diluted magnetic semiconductors. We present the main features of these classes of materials as wel…
Diesel particulate filters (DPF) made from an advanced ceramic material (ACM) based on mullite have demonstrated high filtration efficiency, low‐pressure drop, high‐temperature handling capability, and excellent mechanical integrity at a porosity of 60% or higher. Due to the ability to control microstructure, total po…
A new application for corrugated waveguides as left-handed (LH) meta-material guided-wave structures is investigated. The waveguide is operated below the cutoff of the dominant mode, where the waveguide has an inherent shunt inductance. The dielectric-filled corrugations are used to provide a series capacitance, which…
It is shown that the dependence of self-interstitial cluster diffusivity in Fe–Cr alloys on Cr concentration correlates with that of swelling in these alloys under neutron irradiation; namely, with increasing chromium concentration the cluster diffusivity first decreases and then increases. The origin of such behaviou…
A reinvestigation of nearly stoichiometric RTiO 3 samples shows that (1) the transition from ferromagnetic to antiferromagnetic Ti–O–Ti interactions with increasing R 3+ -ion radius r 3+ occurs at r 3+ ≈1.11 Å where orthorhombic ( Pbnm ) RMO 3 perovskites universally change structure from a cooperative rotation of und…
Presenting breakthrough research pertinent to scientists in a wide range of disciplines-from medicine and biotechnology to cosmetics and pharmacy-this Second Edition provides practical approaches to complex formulation problems encountered in the development of particulate delivery systems at the micro- and nano-size…
An innovative infrared nonlinear optical crystal CsGeBr3 was synthesized. Ab initio calculations on CsGeBr3 were also carried out in order to analyse the second-order nonlinear susceptibilities. From its powder x-ray diffraction pattern, this crystal was characterized as a rhombohedral structure with an (R3m, No 160)…
While several studies have suggested that secondary electrons dominate electron beam induced deposition (EBID), we demonstrate that primary electrons (PE’s) contribute significantly to the deposition for nanoscale EBID over the electron beam energy range (500–20keV). High-aspect ratio pillar growth is a signature of E…
Two Anderson-type heteropolyanion-supported copper phenanthroline complexes, [Al(OH) 6 Mo 6 O 18 {Cu(phen)(H 2 O) 2 } 2 ] 1+ ( 1c ) and [Al(OH) 6 Mo 6 O 18 {Cu(phen)(H 2 O)Cl} 2 ] 1 - ( 1a ) complement their charges in one of the title compounds [Al(OH) 6 Mo 6 O 18 {Cu(phen)(H 2 O) 2 } 2 ][Al(OH) 6 Mo 6 O 18 {Cu(phen)…
A series of glasses (TeO2)x (B2O3)1-x with x = 0.6, 0.63, 0.65, 0.70, 0.73, 0.75, 0.78 and 0.80 were synthesized by rapid quenching. Longitudinal and shear ultrasonic velocity were measured at room temperature and at 5 MHz frequency. Elastic properties, Poisson’s ratio and micro hardness have been calculated from the…
The band structure and the magnetic and elastic characteristics of SrFeO 3 and LaFeO 3 perovskites with ferromagnetic and antiferromagnetic collinear spin configurations (of the A, C , and G types) are investigated using the ab initio pseudopotential method (the VASP program package) with the inclusion of the single-s…
Four series of liquid crystal dimers have been prepared containing either ether‐linked or methylene‐linked spacers. Changing the spacer from being ether‐linked, i.e. O(CH2) n O, to methylene‐linked, i.e. (CH2) n +2, results in decreased nematic–isotropic transition temperatures, and this reduction is more pronounced f…
Five mutations in the ENAM gene have been found to cause hypoplastic amelogenesis imperfecta (AI), with phenotypes ranging from localized enamel pitting in carriers to severe hypoplastic AI. To determine the generality of ENAM mutations in hypoplastic AI, we sequenced the ENAM gene in ten Turkish families segregating…
Au/Fe2O3 catalysts prepared using co-precipitation are described and discussed for the preferential oxidation of CO in the presence of H2, H2O and CO2. A catalyst prepared using a two-stage calcination procedure (400 °C followed by 550 °C) achieves target conversion and selectivity (>99.5% CO conversion and >50% selec…
ADVERTISEMENT RETURN TO ISSUEPREVNoteNEXTSoluble Nylon-Functionalized Carbon Nanotubes from Anionic Ring-Opening Polymerization from Nanotube SurfaceLiangwei Qu, L. Monica Veca, Yi Lin, Alex Kitaygorodskiy, Bailin Chen, Alecia M. McCall, John W. Connell, and Ya-Ping SunView Author Information Department of Chemistry a…
Specialty chemicals based on renewable resources are desirable commodities due to their eco-friendly nature and "green" product characteristics. These chemicals can demonstrate physical and chemical properties comparable to those of conventional petroleum-based products. Suitably functionalized amines in the triacylgl…