Materials Literature
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We have recently commissioned the 2nd generation redshift(z) and Early Universe Spectrometer (ZEUS-2) at the Caltech Submillimeter Observatory. ZEUS-2 is a long-slit grating spectrometer (R~1000) for observations in the submillimeter wavelength regime that is optimized for observations of redshifted far-infrared spect…
Abstract Core‐shell structures of hydrogen‐beryllium clusters are predicted to be higher energy isomers relative to the separate H2 and Ben components, the hydrogen molecule dissociating inside the beryllium cage due to strong charge transfer. Variations of the system shape and stability with the relative orientation…
Abstract Using density functional theory, we evaluate the redox potentials of inorganic dyes (hole injectors) used in the p ‐type dye sensitized solar cells. First, the theoretical level has been benchmarked for a prototypical case, by carefully considering all aspects of the model (basis set, pseudopotential, functio…
In this work, the performance of a-C:H films produced by the hybrid Plasma Immersion Ion Implantation and Deposition technique as lubricating layers for a steel forming tool has been investigated. Hardened steel (AISI M2, 64 HRC) plates coated with a commercial TiN layer were used as substrates and the films were depo…
We investigate quantum heat transport in a one-dimensional harmonic system with random couplings. In the presence of randomness, phonon modes may normally be classified as ballistic, diffusive or localized. We show that these modes can roughly be characterized by the local nearest-neighbor level spacing distribution,…
In environmental remediation after nuclear accidents, radioactive wastes have to be appropriately managed in existing exposure situations with contamination resulting from the emission of radionuclides by such accidents. In this paper, a framework of radiation protection from radioactive waste management in existing e…
We present a detailed analysis of nanoparticle trapping using plasmonic nanostructures, which predicts an improvement of two orders of magnitude in trapping force obtained by optimizing the plasmon resonance of the nanostructures. As the result, a total of four orders of magnitude enhancement in trapping force can be…
: Samples containing single silver nanoparticles have been irradiated by intense femtosecond laser pulses to gain a persistent transformation of their shape to ellipsoidal forms. Irradiated and non-irradiated regions of these samples have been analyzed by microscope spectrometry as well as near-field scanning optical…
Si–Mo–Cr oxidation protective coating has been prepared on the surface of C/SiC coated carbon/carbon (C/C) composites by pack cementation technique. The phase composition and microstructure of the as prepared coatings were characterised by X-ray diffraction, scanning electron microscopy (SEM) and energy dispersion spe…
Considerable quantities of residual oilseed rape straw are available as lignocellulosic fillers in composites of thermoplastic polymers. Composites manufactured from polypropylene filled with crushed oilseed rape straw have favourable mechanical properties and increased sound absorption. Unfortunately, the straw of oi…
Failed rail can be repaired using self-shielded flux cored wire. Aluminium powder is always added to the flux cored wire to protect the weld pool. However, the Al content affects the microstructure and property of the surfacing layer significantly. Therefore, the microstructure and impact property of the surfacing lay…
Pulp from the alkaline peroxide mechanical pulping (APMP) of oil palm empty fruit bunch, EFB, was fractionated with varying mesh-size screens to examine the effects imposed by size-specific fines on the produced pulp network. Occurring mainly as a result of refining, fines elements with dimensions almost resembling EF…
Abstract Not Provided
A new cationic silver N-alkylpyridylporphyrin complex is able to 'sense' nanometric conductive particles with a diameter below 10 nm. The luminescence of the molecule changes its maximum from red to blue when it embraces a conductive (metallic or semiconducting) nanoparticle. The change is explained on the basis of a…
Abstract Attempts were made to prepare the polypropylene (PP) /ethylene‐propylene‐diene monomer (EPDM) blends with zinc dimethacrylate (ZDMA) via peroxide dynamic vulcanization. PP was melt‐mixed with EPDM and ZDMA at different compositions (PP/EPDM/ZDMA, i.e., 70/30/0, 70/30/3, 70/30/6, and 70/30/9, w/w/w) using an i…
PURPOSE: Vessel damage after clamping may affect the success of surgical operations. A new pressure controlled clamp (SMA clamp) was designed using super elastic property of shape memory alloy (SMA) to realize atraumatic vessel occlusion. The ability and biological effect of the SMA clamp to control pressure was inves…
Abstract Recently, sulfur‐containing copolyimides have attracted increasing attention as membrane materials for the separation of gaseous, vaporous, or liquid mixtures because of their superior separation properties. Therefore, a novel sulfur‐containing copolyimide based on 4,4′‐(hexafluoroisopropylidene)diphthalic an…
Biomedical implants such as prosthetic hips and heart stents and instruments used in vivo all have negative performance issues. A common solution, which can also be appropriate for other devices, is to apply a diamond-like carbon thin film in order to enhance the performance of the devices. The films were produced by…
The effects of the Electron Beam Plasma treatment on natural polysaccharide chitosan were studied experimentally. Low molecular water-soluble products of chitosan and chitooligosaccharides were obtained by treating the original polymers in the Electron Beam Plasma of oxygen and water vapor. The molecular mass of the p…
A homogeneous chemiluminescence (CL) reaction was initiated by ultrasound irradiation. Luminol sonochemiluminescence (SCL) reaction kinetics were determined under pseudo-first-order conditions, and the reaction followed the model for simple rise-fall kinetics. In addition, SCL quenching reactions induced by purines we…