Materials Literature
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Unique temperature dependence of deep ultraviolet emission intensity for diamond light emitting diodes, Kuwabara, Daisuke, Makino, Toshiharu, Takeuchi, Daisuke, Kato, Hiromitsu, Ogura, Masahiko, Okushi, Hideyo, Yamasaki, Satoshi
In recent years the potential of slow highly charged ions (HCI) as tools for nanostructuring purposes has received considerable attention and a wide range of material classes, from insulating ionic crystals, polymers and ultrathin films, to semiconducting and conducting substrates have been investigated regarding thei…
To reduce particulate matter (PM) in diesel exhaust gas, a diesel particulate filter (DPF) has been developed. The thermal durability of existing platinum catalyst-supported DPFs is inadequate. We are focusing on a non-catalytic after-treatment of silicon carbide (SiC) fibers with highly thermal durability. In this st…
The syntheses and crystal structures of two iridium complexes, (dfppy)2IrPyCl (1) and [(dfppy)2Ir(Py)2]PF6 (2), are reported. 1 can selectively detect Ag+ with UV–vis absorption and emission spectra. In the presence of Ag+, the obvious decrease of the luminescence intensity at 476 nm was observed, which could be monit…
Abstract We have performed first‐principles calculations of the magnetic properties of the overdoped (x=0.25) LSCO and Fe‐LSCO systems. Originally, without impurities of iron, La1.75Sr0.25CuO4 is nonmagnetic. Replacing one of Cu atoms in a unit cell with an Fe atom (3 or 6% of Fe relatively to the Cu content) results…
Potential sputtering was studied using highly charged ions impacting on SiO 2 and Au surface. A threshold effect for potential sputtering was found for gold.
To investigate which type of bond is likely to be cleaved by soft X-ray exposure to an adenosine 5'-triphosphate (ATP), we observed spectral changes in X-ray absorption near edge structure (XANES) around nitrogen and oxygen K -edge of an ATP film by soft X-ray irradiation. Experiments were performed at a synchrotron s…
In order to clarify changes in the electronic structures, especially Fe partial density of states (DOS), of Li 2 Fe 1− x MnxP 2 O 7 with Mn substitution, we have performed x-ray absorption spectroscopy and resonant photoemission spectroscopy (RPES) experiments for Li 2 Fe 1− x Mn x P 2 O 7 . Using RPES teqniques, we h…
The energy-loss spectrum of scattered electrons due to the excitation of the 1 sn 1 l 1 n 2 l 2 autoionizing states and the ejected-electron spectrum arising from the decay of these states in lithium atoms were measured at scattering angle 54.7° and 80 eV impact energy. A comparative analysis of excitation and decay c…
The radiation damage rates in the Al-303-1-alloy cladding of the Syrian Miniature Neutron Source Reactor reactor has been numerically estimated with the The MCNP-4C and NJOY93 codes and the ENDF/B-VI library. The calculations showed that the Al-cladding alloy had received a maximum radiation damage rate equal to 7.01×…
The origin of the analysis of concentration dependent diffusivities in solids is closely related to a method nowadays referred to as the Boltzmann-Matano method. This chapter recalls the scientific environment of the emergence of this method first described in a paper by C. Matano in 1933. The unique contributions by…
We investigated the optical characteristics and microstructures of wave plates composed of Ta2O5(100−x)+TiO2(x) and prepared by the so-called serial bideposition technique. While a single-layer film prepared by conventional oblique deposition technique has a tilted columnar structure (i.e., tilted optical axis), a ser…
Carrier transport properties of organic field effect transistors in dinaphtho[2,3-b:2',3'-f]thieno[3,2-b]thiophene single crystals have been investigated under high pressure. In contrast to the typical pressure effect of monotonic increase in charge transfer rates according to the application of external hydrostatic p…
The electronic states of tetrathiafulvalene (TTF: TTF = C6H4S4) molecule in organic ferroelectric TTF-p-bromanil (TTF-BA: BA = C6Br4O2) and TTF crystals have been investigated by x-ray absorption spectroscopy (XAS) measurement at S K-edge. We elucidated that the peak structure at 2470.5 eV directly reflects the existe…
This research aims in characterizing modified cement mortar with carbon nanotubes (CNTs) that act as nanoreinforcements leading to the development of innovative materials possessing multi-functionality and smartness. Such multifunctional properties include enhanced mechanical behavior, electrical and thermal conductiv…
Electrophoretically deposited graphene (HG) on silicon is irradiated using a cobalt-60 gamma radiation source with the radiation dose up to 22.7 kGy. The effect of gamma irradiation on the field emission current noise behavior of HG is investigated. The power spectra of pristine and irradiated HG exhibit 1/fα type of…
In order to understand observations that the wall conditioning, wall material and the way of fuelling of neutral particles influence the core confinement in magnetic confinement devices, possible roles of particle fuelling to enhance edge turbulence are discussed. Bootstrapping of edge turbulence by the coupling with…
The process of lithium-intercalation in spinel-structured lithium manganese oxide (LiMn 2 O 4 ) particles was probed by a highly spatially resolved X-ray photoelectron microscopy technique using our "3D nano-ESCA" (three-dimensional nanoscale electron spectroscopy for chemical analysis) equipment. We found the change…
The mechanically activated oxides MnO2, Mn2O3, Mn3O4 and MnO were studied under ambient and non-ambient temperature conditions. Regimes of mechanical treatment were found that allowed one to preserve the single-phase state without an essential change of oxide chemical composition. New data about the temperatures and s…
Most NASA missions require the use of a launch lock for securing moving components during the launch or securing the payload before release. A launch lock is a device used to prevent unwanted motion and secure the controlled components. The current launch locks are based on pyrotechnic, electro mechanically or NiTi dr…