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Fluorinated Metal Hydrides for the Catalytic Hydrolysis of Metal - Hydrogen Complexes
Suda, S,Zhou, Y,Sun, Y M,Uchida, M,Liu, B H,Mormitu, S,Arai, K,Tsukamoto, N,Candra, Y,LI, Z P 대한금속재료학회(대한금속학회) 2001 METALS AND MATERIALS International Vol.7 No.1
This paper is related to the hydrogen storage (H-storage) system composed of an alkaline solution that contains metal-hydrogen complex ions. The BH₄^--complex ions stabilized when it is dissolved in aqueous KOH or NaOH to form homogeneous solutions. However, it is necessary to apply an appropriate catalyst for a high rate generation of hydrogen under atmospheric pressure and temperature conditions. The authors intended to develop catalysts suitable for the hydrolysis of BH₄^--complex ion solutions and found that Mg₂Ni exhibits excellent catalytic functions in the hydrolysis, in particular, after the fluorination treatment (F-treatment). In this work, the effects of F-treatment on the rates of hydrolysis were evaluated between the hydrided and unhydrided Mg₂Ni. No hydrogenation in addition to F-treatment is required in view of hydrolysis kinetics and cost-effectiveness.
Lee, H.-S.,Kim, B.-S.,Kim, H.-M.,Wi, J.-S.,Nam, S.-W.,Jin, K.-B.,Arai, Y.,Kim, K.-B. WILEY-VCH Verlag 2007 Advanced Materials Vol.19 No.23
<B>Graphic Abstract</B> <P>An electron beam projection lithography technique that employs the various crystalline lattice images available in high-resolution transmission electron microscopy is reported. We successfully fabricated periodic arrays of various patterned structures with feature sizes of about 25 nm using single-crystalline Si and &bgr;-Si<SUB>3</SUB>N<SUB>4</SUB> as the mask materials. <img src='wiley_img/09359648-2007-19-23-ADMA200701119-content.gif' alt='wiley_img/09359648-2007-19-23-ADMA200701119-content'> </P>
Abdellaoui, G.,Abe, S.,Adams Jr., J.H.,Ahriche Jr., A.,Allard Jr., D.,Allen Jr., L.,Alonso Jr., G.,Anchordoqui Jr., L.,Anzalone Jr., A.,Arai Jr., Y.,Asano Jr., K.,Attallah Jr., R.,Attoui Jr., H.,Ave P North-Holland 2019 Astroparticle physics Vol.111 No.-
<P><B>Abstract</B></P> <P>The JEM-EUSO (Joint Experiment Missions for the Extreme Universe Space Observatory) program aims at developing Ultra-Violet (UV) fluorescence telescopes for efficient detections of Extensive Air Showers (EASs) induced by Ultra-High Energy Cosmic Rays (UHECRs) from satellite orbit. In order to demonstrate key technologies for JEM-EUSO, we constructed the EUSO-Balloon instrument that consists of a ∼1 m<SUP>2</SUP> refractive telescope with two Fresnel lenses and an array of multi-anode photo-multiplier tubes at the focus. Distinguishing it from the former balloon-borne experiments, EUSO-Balloon has the capabilities of single photon counting with a gate time of 2.3 µs and of imaging with a total of 2304 pixels. As a pathfinder mission, the instrument was launched for an 8 h stratospheric flight on a moonless night in August 2014 over Timmins, Canada. In this work, we analyze the count rates over ∼2.5 h intervals. The measurements are of diffuse light, e.g. of airglow emission, back-scattered from the Earth’s atmosphere as well as artificial light sources. Count rates from such diffuse light are a background for EAS detections in future missions and relevant factor for the analysis of EAS events. We also obtain the geographical distribution of the count rates over a ∼780 km<SUP>2</SUP> area along the balloon trajectory. In developed areas, light sources such as the airport, mines, and factories are clearly identified. This demonstrates the correct location of signals that will be required for the EAS analysis in future missions. Although a precise determination of count rates is relevant for the existing instruments, the absolute intensity of diffuse light is deduced for the limited conditions by assuming spectra models and considering simulations of the instrument response. Based on the study of diffuse light by EUSO-Balloon, we also discuss the implications for coming pathfinders and future space-based UHECR observation missions.</P>
철 및 코발트 - 철합금석출 양극산화피막의 초기석출부가 자기특성에 미치는 영향
강희우(H. W. Kang),荒井賢一(Ken-Ichi Arai) 한국자기학회 1995 韓國磁氣學會誌 Vol.5 No.6
The micro particles shapes of the magnetic films obtained by electrodeposition of Iron ions and Cobalt-Iron mixed ions in aluminum anodic oxidized films are dependent on the size of particle diameter. When the diameter of deposited particles is larger than 300 Å, the film plane anisotropy caused by bottom extremity increases, and the crystalization orientation of FeC deposited unusually in the part of the bottom extremities affects on the coercive force He and the magnetic anisotropy energy Ku. It was confirmed that the shape anisotropy of particle affects on the both He and Ku because the FeC did not deposit in the Iron deposited samples entirely, but in the Cobalt-Iron alloy deposited samples, the effects by the very strong crystalization orientation of the FeC is larger than that of the shape anisotropy. From these results, the Cobalt-Iron alloyed films could switchover the film plane magnetic anisotropy to the perpendicular magnetic anisotropy energy by using the constrainting method of FeC deposition with Cu deposition instead of Cobalt-Iron alloy in the bottom extremities.