Materials Literature
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Nanocomposite materials were obtained using a latex of natural rubber as the matrix and an aqueous suspension of waxy maize starch nanocrystals as the reinforcing phase. Starch nanocrystals were obtained after sulfuric acid hydrolysis of waxy maize starch granules. They consisted of crystalline platelets 6−8 nm thick,…
Abstract The mechanical performance of short randomly oriented banana and sisal hybrid fiber reinforced polyester composites was investigated with reference to the relative volume fraction of the two fibers at a constant total fiber loading of 0.40 volume fraction (V f ), keeping banana as the skin material and sisal…
The EMBL-Hamburg Automated Crystal Structure Determination Platform is a system that combines a number of existing macromolecular crystallographic computer programs and several decision-makers into a software pipeline for automated and efficient crystal structure determination. The pipeline can be invoked as soon as X…
We show that the capacitance of single-walled carbon nanotubes (SWNTs) is highly sensitive to a broad class of chemical vapors and that this transduction mechanism can form the basis for a fast, low-power sorption-based chemical sensor. In the presence of a dilute chemical vapor, molecular adsorbates are polarized by…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSupramolecular Nanotube Architectures Based on Amphiphilic MoleculesToshimi Shimizu, Mitsutoshi Masuda, and Hiroyuki MinamikawaView Author Information Nanoarchitectonics Research Center (NARC), National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba…
The singlet oxygen generator development is the basic problem of fullerene oxygen iodine laser design. Physival principles of singlet oxygen generator on the base of solid-state fullerene-containing structures were investigated. The solid-state singlet oxygen generator is a surface of membranous structures with embedd…
Complex refractive index and Complex dielectric permittivity and loss tangent data for polyethylene, polypropylene, poly-4 methyl pentene-1 (TPX) and polytetrafluoroethylene (Teflon) are presented over the frequency range 40-300 GHz. All of these non-polar polymers are extremely low loss material. Like the microwave r…
Novel isoxazole-fused chlorins and isobacteriochlorins were synthesized by the 1,3-dipolar cycloaddition reactions of meso-tetraphenylporphyrins with nitrile oxide.
The dynamics of porphyrin ring inversion of a number of Fe(III) complexes of octamethyltetraphenylporphyrin, (OMTPP)Fe(III); octaethyltetraphenylporphyrin, (OETPP)Fe(III); octaethyltetra(perfluorophenyl)porphyrin, (F(20)OETPP)Fe(III); and tetra-beta,beta'-tetramethylenetetraphenyl-porphyrin, (TC(6)TPP)Fe(III), having…
A potentially serious problem that may arise with nonradiative dielectric ( NRD ) guide circuitry is described. First, a small unwanted air gap would generate a leaky hybrid mode that could produce cross talk between components of a circuit, and, second, if the plate width were also finite another type of leaky mode w…
Structure and Photoluminescence of Nano-ZnO Films Grown on a Si (100) Substrate by Oxygen- and Argon-Plasma-Assisted Thermal Evaporation of Metallic Zn, Lu Li-Xia, Tang Qin-Xin, Shao Chang-Lu, Liu Yi-Chun
Hexagonal strontium ferrite (SrFe 12 O 19 ) powders were synthesized by the conventional ceramic techniques. They were then characterized by the X-ray diffraction method and incorporated in the natural rubber matrix according to a specific recipe for various loadings of ferrite to produce rubber ferrite composites (RF…
Fringing electric fields emanating from an electrode edge in electromechanically coupled materials can potentially lead to cracking from a strain incompatibility of the active and inactive regions. Partial electrodes and specimen geometry are studied in single crystal PZN-4.5%PT to characterize the fracture behavior n…
The S = 2 complex, manganese(III) meso-tetra(4-sulfonatophenyl)porphine chloride (Mn(III)TSPP) is a highly efficient relaxation agent with respect to water protons and has been studied extensively as a possible MRI contrast agent. The NMR relaxation mechanism has several unique aspects, key among which is the unusual…
[reaction: see text] A novel synthetic approach to diversely functionalized "locked" chlorins is described. A suitably substituted 2,5-diformylpyrrole undergoes the macrocyclization reaction with tripyrranes, thereby generating porphyrins. Upon the reaction with 1,3-dipoles these porphyrins regioselectively furnish py…
Abstract The use of polymers containing metal salts as ceramic high‐temperature superconductor (HTSC) precursors may provide a relatively simple and rapid method for producing materials that can take advantage of advanced polymer processing and then be pyrolyzed to HTSCs. The mechanisms of thermal degradation in these…
The application of a novel kaoline in the natural rubber (NR) system is studied. First, the cure properties are tested; second, the mechanical properties of the novel kaoline-filled system are studied; third, its replacement of carbon black in NR system is compared; meanwhile, the application of the novel kaoline into…
Ag-doped Ge2Sb2Te5 films were deposited by rf magnetron sputtering on SiO2/Si substrates. The content of Ag ranging from 4.5 to 11.3 at.% is determined by inductively coupled plasma atomic emission spectrometry. The crystallization temperature of Ag-doped Ge2Sb2Te5 increases with the increasing Ag content and the stab…
Abstract The investigation of CdCl 2 ‐HIO 3 system, in aqueous and HNO 3 solutions, revealed that anhydrous cadmium iodate presents a marked polymorphism. No less than four new Cd(IO 3 ) 2 polymorphs have been isolated and characterized, two of which showing second harmonic generation activity. Single crystals of ε‐Cd…
A study has been made of the scanning properties of solid dielectric bifocal lenses. In two dimensions, a bifocal lens is a two-surface lens, symmetric about an axis, designed to collimate the rays from a primary point source lccated at either of two conjugate off-axis positions into plane waves making angles+\alphaan…