Author
M. Okada
Bio: M. Okada is an academic researcher. The author has contributed to research in topics: Thin film & Hydride. The author has an hindex of 1, co-authored 1 publications receiving 148 citations.
Topics: Thin film, Hydride, Sputter deposition, Optical coating
Papers
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TL;DR: In this article, the optical transmittance of these Mg-rich MgNi thin films in the hydride state is much improved compared with that of Mg2Ni thin film.
Abstract: Mg–Ni alloy thin films were prepared by dc magnetron sputtering using Mg and Ni targets, and their optical switching property for hydrogen exposure has been investigated. Pd-capped MgNix (0.1
155 citations
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TL;DR: In this article, the hydrogen storage in metal hydrides with particular interest in Mg as it has potential to become one of the most promising storage materials, and the possibility of commercialization of Mg based alloys has been discussed.
922 citations
TL;DR: In this paper, the authors reviewed the methods used by the authors to synthesize Mg-based hydrogen storage materials with nanostructure as well as some novel techniques from other researchers, and focus on how these nanotechnology processing methods could change kinetics and thermodynamics in Mgbased materials for hydrogen storage.
233 citations
TL;DR: Great interest has been drawn to the electrochromic effect exhibited by inorganic materials, because of their possible applications in information displays, light shutters, and the application of an electrical voltage.
Abstract: Chromogenic materials can change their optical properties in response to external stimuli, such as light irradiation [ 1–3 ] (photochromic materials), temperature change [ 4 , 5 ] (thermochromic materials), exposure to gas [ 6 , 7 ] (gaschromic materials), and the application of an electrical voltage [ 8–14 ] (electrochromic materials). Great interest has been drawn to the electrochromic effect exhibited by inorganic materials, because of their possible applications in information displays, [ 15 , 16 ] light shutters, [ 17 , 18 ]
95 citations
TL;DR: The electrochromic properties were significantly enhanced by applying nanostructures, resulting in faster switching responses, higher stability and higher optical contrast.
Abstract: The recent progress in application of nanostructures in electrochromic materials and devices is reviewed. ZnO nanowire array modified by viologen and WO₃, crystalline WO₃ nanoparticles and nanorods, mesoporous WO₃ and TiO₂, poly(3,4-ethylenedioxythiophene) nanotubes, Prussian blue nanoinks and nanostructures in switchable mirrors are reviewed. The electrochromic properties were significantly enhanced by applying nanostructures, resulting in faster switching responses, higher stability and higher optical contrast. A perspective on the development trends in electrochromic materials and devices is also proposed.
91 citations
TL;DR: In this paper, the Pd/Mg thin films on Si substrates at 295 K showed drastic optical changes in reflectance within 5 s. XPS analysis reveals that there exists an intermixing layer of Pd and Mg near the surface, and that MgH2 is formed very quickly in this inter mixinging layer.
81 citations