Materials Literature
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Reactions of NO and CO with Fe(II) complexes of the tripodal trithiolate ligands NS3 and PS3* yield trigonal-bipyramidal (TBP) complexes with varying redox states and reactivity patterns with respect to dissociation of the diatomic ligand. The previously reported four-coordinate [Fe(II)(NS3)](-) complex reacts irrever…
This paper describes a novel, versatile system for measuring the stress sensitivity of magnetostriction of Epstein strips of grain-oriented electrical steel, an analysis of results of measurements on several grades of commercial material, and an attempt to relate their stress sensitivity characteristics to material pr…
The structural and vibrational properties of two uncharged 2:1 phyllosilicates, talc and pyrophyllite, are investigated via ab initio and classical molecular dynamics simulations. The quantum mechanical simulations are based on plane−wave pseudopotential density functional theory (DFT), which is shown to be sufficient…
(1− x )(Na 0.5 K 0.5 )NbO 3 –(Bi 0.5 K 0.5 )TiO 3 solid solution ceramics were successfully fabricated, exhibiting a continuous phase transition with changing x at room temperature from orthorhombic, to tetragonal, to cubic, and finally to tetragonal symmetries. A morphotropic phase boundary (MPB) between orthorhombic…
Thermal management of microprocessors has become an increasing challenge in recent years because of localized high flux hot spots which cannot be effectively removed by conventional cooling techniques. This paper describes the use of the silicon chip itself as a thermoelectric cooler to suppress the hot spot temperatu…
We report the shape transformation of gold nanorods to spherical nanoparticles, assisted by cupric ions. The reaction proceeds through a series of structures and could be arrested at any stage to produce particles of desired shape. In the presence of a larger concentration of cetyltrimethylammonium bromide (CTAB), sel…
We present a robust and general method for embedding nanoparticles, such as quantum dots (QD) or colloidal gold (Au) nanocrystals, into a highly water-soluble thin silica shell doped with paramagnetic gadolinium (Gd 3+ ) ions without negatively impacting the optical properties of the QD or Au nanoparticle cores. The u…
The illitization process of Fe-rich smectite (nontronite NAu-2) promoted by microbial reduction of structural Fe 3+ was investigated by using a thermophilic metal-reducing bacterium, Thermoanaerobacter ethanolicus, isolated from the deep subsurface. T. ethanolicus was incubated with lactate as the sole electron donor…
A novel Λ-shaped pyridinium salt 2,8-(6 H,12 H -5,11-methanodibenzo[ b,f ]diazocineylene)-di( p -ethenyl-N-methyl-pyridinium) ditosylate (abbreviated as DMDPS ) based on Tröger's base was designed, synthesized and characterized. DMDPS exhibits a typical aggregation-induced emission (AIE) behavior that is virtually non…
Silicon-micromachining techniques have been combined with conventional material-synthesis methods to develop microelectrodes for 3-D microbatteries. The resulting electrodes feature an organized array of high-aspect-ratio microscale posts fabricated on the current collector to increase their surface area and volume fo…
Rare earth ion-doped yttrium oxide (Y2O3) nanocrystals are nontoxic and can be prepared as upconversion materials for cellular imaging, but they do not suspend well in water. In contrast to their tendency to dissolve in acidic media, yttria (Y2O3) nanoparticles readily react with phosphonic acids to give phosphonate-b…
This study focused on the effect of single jersey, single pique, double pique and honeycomb structures and structural cell stitch length (SCSL) on ring and compact yarn single jersey fabric properties. Compact yarn fabrics showed better performance in all the structures and their respective SCSL. With increased SCSL,…
As a natural filling material, the goose down is well known for its superior thermal insulating properties and is widely used as an insulated filling material for winter outerwear and quilters. However, our understanding of the material is so poor that we still cannot fully explain the mechanisms or the sources for it…
Formation of biomineral structures is increasingly attributed to directed growth of a mineral phase from an amorphous precursor on an organic matrix. While many in vitro studies have used calcite formation on organothiol self-assembled monolayers (SAMs) as a model system to investigate this process, they have generall…
The use of polymers and polymeric structures in the treatment, diagnosis, and monitoring of biological systems is continuing to increase in sophistication. Research exploring the use of nanoparticles for drug delivery applications has included the exploration and development of nanocolloids, liposomes, micelles, nanog…
Vitreous samples were prepared in the (100 - x)% NaPO(3)-x% MoO(3) (0 <or= x <or= 70) glass-forming system by a modified melt method that allowed good optical quality samples to be obtained. The structural evolution of the vitreous network was monitored as a function of composition by differential scanning calorimetry…
A simple wet chemical route to the novel dendritic Pd nanostructure is reported. The nanostructure evolves from the initially generated spherical particles by the reaction of Pd(II) ions with hydrazine in the presence of polyglycol into urchinlike particles and then into the final dendrites. It is found that the polyg…
We describe a relatively simple, reliable, and reproducible preparation technique, the precursor oxidation process, for making VO2 films with strong semiconductor-to-metal phase transition. Sputter-deposited metal precursor V films were oxidized in situ in the deposition chamber for 2.5–7h at 370–415°C in 0.2Torr O2 t…
BACKGROUND: Nephrogenic systemic fibrosis (NSF), previously known as nephrogenic fibrosing dermopathy, is an idiopathic condition seen in patients with renal disease that is characterized by cutaneous sclerosis that can often result in contractures, pain, and functional disability as well as systemic complications. Re…
This work is the continuation of our previous experimental and theoretical studies aiming at designing efficient nonlinear optical (NLO) switches derived from the benzazolo-oxazolidine core. Here, we report the synthesis and the characterization of the linear and nonlinear optical properties of benzothiazolo[2,3-b]oxa…