Materials Literature
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Prussian blue molecule-based magnets can be designed to exhibit various magnetic properties. One of them based on chromicyanide and vanadium is a magnet at room temperature. Its properties are very sensitive to the synthetic reaction conditions, solvent effects and counterions which can be used to tune the Tc. To stud…
High‐toughness and high‐strength lead zirconate titanate (PZT) composites that contain fine silver particles were successfully fabricated at low sintering temperatures. Addition of silver to a PZT matrix did not result in unwanted reaction phases; however, some silver diffused toward the perovskite crystal structure.…
The transformation from ionic to neutral phases in tetrathiafulvalene-p-chloranil crystals is induced by exciting the charge-transfer absorption band below the transition temperature. The transformation takes place only above a threshold intensity of excitation, and the efficiency of generating neutral-phase domains i…
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTSynthesis of Comb-Type Biodegradable Polylactide through Depsipeptide−Lactide Copolymer Containing Serine ResiduesFumitaka Tasaka, Hidetake Miyazaki, Yuichi Ohya, and Tatsuro OuchiView Author Information Department of Applied Chemis…
A nanoindentation technique has been applied to demonstrate the mechanical actuation of thin films fabricated by glancing angle deposition. The films were comprised of a porous layer whose microstructures consisted of helical columns that resembled springs. Surmounting the porous layer was a dense capping layer which…
The deformation processes in crystalline polymers have been studie ever since the discovery of chain folding in 1957. Since then, scientists have been intrigued by the different steps of the transformation of the folded-chain lamellar structure of single crystals or of macroscopically isotropic, often spherulitic, pol…
Type 1 Cu centers in cupredoxins, nitrite reductases, and multi-copper oxidases utilize the same trigonal core ligation to His-Cys-His, with a weak axial ligand generally provided by a Met sulfur. In azurin, an additional axial ligand, a carbonyl oxygen from a Gly, is present. The importance of these axial ligands and…
Bacterial resistance to existing antibiotics poses a serious threat to human health. Because the peptidoglycan layer surrounding bacterial cells is essential for survival, the enzymes involved in peptidoglycan biosynthesis are attractive targets for the design of new antibiotics. Unfortunately, many of these enzymes a…
We report detailed lattice dynamical calculations of the large isotropic negative thermal expansion (NTE) over 0--1050 K in ${\mathrm{ZrW}}_{2}{\mathrm{O}}_{8}$ in its cubic phase. The results bring out the unusually dominant quantitative contributions to NTE of the transverse acoustic, and librational and translation…
We have deposited nanocrystalline diamond films on p-type Si(100) substrates using plasma enhanced chemical vapor deposition (CVD). The diamond films were deposited at substrate temperatures between 950 and 980 °C using a high methane concentration of 5% in H2. The films obtained showed good field emission properties…
With the aim to construct synthetic systems that function according to the principles of enzymes, molecular clips based on diphenylglycoluril were covalently attached to (metallo)porphyrins. Two different porphyrin clips, 1 and 2, were synthesized that differ in the length and position of the linker between the clip a…
Seven different aqueous or ethanolic precursors were used to continuously coat monazite (LaPO 4 ) on Nextel 720™ fiber tows. Immiscible liquid displacement was used to minimize bridging of coating between filaments. Precursor viscosities, densities, and concentrations were measured, and solids were characterized by DT…
Tin-doped and undoped amorphous indium oxide films were prepared by dc magnetron sputtering without substrate heating at relatively high total gas pressures and relatively large target-substrate distance. The structural and electrical properties of these films were investigated by X-ray diffraction and Hall-effect mea…
Abstract A template carbonization technique was applied for synthesizing carbon nanotubes and metal filled nanotubes. An anodic aluminum oxide film that has uniform and straight channels with a diameter at nanometer level was used as a one-dimensional template. The pyrolytic carbon deposition on the channel wall was c…
In an attempt to strengthen the surface of materials, the potential of using a cavitating jet to form compressive residual stress has been investigated. Introducing compressive residual stress to a material surface provides improvement of the fatigue strength and resistance to stress corrosion cracking. In general, ca…
SrBi 4 Ti 4 O 15 ceramics were prepared via ordinary firing (OF) and hot forging (HF). Characterization using scanning electron microscopy and X‐ray diffractometry shows platelike grains that were highly oriented ( F = 0.95) after hot forging. Ferroelectric, dielectric, and piezoelectric characterizations revealed tha…
The development of a surface-enhanced Raman scattering (SERS) method and instrument for use in biomedical and genomics analysis is described. The technology uses DNA gene probes based on SERS labels for gene detection and DNA mapping. The detection method uses nanostructured metallic substrates as SERS-active platform…
Phthalocyanines (Pc) modified at eight positions with benzyloxyethoxy groups (CuPc(OC 2 OBz) 8 and H 2 Pc(OC 2 OBz) 8 ) form discotic mesophases in the bulk and self-assemble into cofacial rodlike aggregates in monolayers. These Pc aggregates form close packed arrays which are simple to process into highly coherent mu…
We have performed magnetic and transport measurements on several series of ${\mathrm{La}}_{0.7}{\mathrm{Ca}}_{0.3}{\mathrm{MnO}}_{3}$ polycrystalline pellets and thin films. The aim is to discriminate the effects of structural and chemical disorder on the electronic transport properties of polycrystalline manganites.…
A series of titanium compounds have been studied by x-ray photoelectron spectroscopy within the Auger parameter formalism. Two different titanium Auger parameters are reported, both calculated from binding energies resulting from photoemission from Ti 2p3/2 core-level states. Of the two values, one has been commonly u…