Materials Literature
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In Murata vortex spinning, the highspeed whirled airflow twists the open-end trailing fibers converged at the inlet of the hollow spindle into a yarn. The twisted strength acting on the vortex spun yarn by the whirled airflow was investigated by an analytical model based on simulating the flow field inside the nozzle…
In this paper, we report the measurements of the thermal conductivity and longitudinal sound velocity of four types of hydrogenated amorphous carbon films. The measurements were made with an ultrafast optical pump-probe apparatus. The films were deposited at various temperatures by plasma enhanced chemical vapor depos…
The correlation between defect structure, metal segregation, and electrical resistivity of indium-tin-oxide nanopowder upon treatment in reducing atmosphere was investigated. Morphology and defect structure have been investigated by in situ synchrotron x-ray diffraction and transmission electron microscopy, while trac…
Next generation PEEK-WC membranes have been fabricated by using an innovative self-assembly technique. Patterned architectures have been achieved via a solvent-reduced and water-assisted process, resulting in honeycomb packed geometry. The membranes exhibit monodisperse pores with size and shape comparable to those le…
Thin films of molybdenum trioxide were deposited onto glass and electrically conducting substrates fluorine doped tin oxide coated glass (FTO) by spray pyrolysis technique. The effect of concentration (5mM, 10mM, 15 mM) on the structural, morphological, optical and electrochromic properties of MoO3 thin films were stu…
Abstract The uniform polyaniline (PANI) nanotubes, with inner diameter, outer diameter, and tubular thickness of 40, 60, and 10 nm, respectively, were prepared successfully by using natural tubular aluminosilicates as templates. The halloysite nanotubes were coated with PANI via the in situ chemical oxidation polymeri…
We report on the preparation and characterization of indium tin oxide (ITO) nanofiber films with a patterned architecture that are transparent and conductive with a uniform fiber size. ITO nanofiber films with a crisscross pattern were prepared by the electrospinning of a precursor solution containing ethanol, dimethy…
Abstract Thrombus formation and blood coagulation is a major problem associated with blood contacting products such as catheters, vascular grafts, arteries, artificial hearts and heart valves. An intense research is being conducted towards the synthesis of new hemocompatible materials and modifications of surfaces wit…
Abstract Summary: Polymer‐capped metal nanoparticles can be recognized as a kind of macromolecule‐metal nanoparticle complexes. Here the preparations of the capped bimetallic and trimetallic nanoparticles, in which each particle contains two and three elements of metal, respectively, are presented. They may have a ran…
Thin films of multiferroic Bi 2 NiMnO 6 (BNMO) have been epitaxially stabilized on various lattice-matched substrates using the pulsed laser deposition technique. BNMO films deposited on conducting Nb doped SrTiO 3 substrates exhibit a magnetodielectric effect, in which the effective dielectric constant is dependent o…
We introduce a pulsed electro acoustic (PEA) device enabling space charge measurement inside dielectric films without the need of sample to excitation unit contact. The new device -called open PEA because one face of the film is at a floating potential- has been used to investigate the internal charge of electron beam…
As part of an ongoing project to establish a reference facility for acoustic cavitation at the National Physical Laboratory (NPL), carefully controlled studies on a 25 kHz, 1.8 kW cylindrical vessel are described. Using a patented high-frequency acoustic emission detection method and a sonar hydrophone, results are pr…
Non-viral vectors have gained increasing attention in gene therapy because of their safety, but with the shortcoming of low transfection efficiency. We have developed a hybrid material as a novel non-viral vector, which combines the advantages of both biopolymer and clay in a gene delivery system. Quaternized chitosan…
Abstract Cathodoluminescence (CL) imaging and spectroscopy are outstanding methods in several fields of geosciences. Cathodoluminescence can be examined using a wide variety of electron-beam equipment. Of special interest to geologists are optical microscopes (OMs) equipped with an electron gun. scanning electron micr…
Solid preceramic polyaluminasilazane was synthesized through the reaction between liquid cyclosilazane and aluminum tri‐sec‐butoxide at 160°C. Electrospinning of polyaluminasilazane/polyethyleneoxide (1/0.0001 mass ratio) in chloroform solutions generated smooth fibers while the electrospun fibers from the chloroform/…
Resumen.-El gnero Chaetoceros es un componente importante del plancton marino, de amplia distribucin mundial en trminos de diversidad y biomasa. El presente trabajo est abocado a la morfologa, taxonoma y distribucin de las especies pertenecientes al gnero Chaetoceros encontradas en aguas costeras marinas de la Provinc…
The new principle of electronic paper that can display two-dimensional (2D) or even stereoscopic three-dimensional (3D) images was developed by us. We review the structure of the display unit that is the light printable rewritable matter with polarization dependent gray scale. It consists of one or two liquid crystal…
The electrical properties of polyaniline changes by orders of magnitude upon exposure to analytes such as acids or bases, making it a useful material for detection of these analytes in the gas phase. The objectives of this lab are to synthesize different diameter polyaniline nanofibers and compare them as sensor mater…
We report on the in-situ controlled tuning of the particle gap in single pairs of gold nanodisks by photochemical metal deposition. The optically induced growth of nanodisk dimers fabricated by electron beam lithography leads to a decrease of the interparticle gap width down to 0 nm. Due to the increasing particle siz…
We consider the evolution of a multi-phase system where the motion of the interfaces is driven by anisotropic curvature and some of the phases are subject to volume constraints. The dynamics of the phase boundaries is modeled by a system of Allen–Cahn type equations for phase field variables resulting from a gradient…