Nano Archive

Electrochromism in mischmetal-based AB(2) alloy hydride thin film

Krishna Kumar, M. and Rajalakshmi, N. and Ramaprabhu, S. (2007) Electrochromism in mischmetal-based AB(2) alloy hydride thin film. JOURNAL OF PHYSICAL CHEMISTRY C, 111 (24). pp. 8532-8537. ISSN Print Edition ISSN: 1932-7447; Web Edition ISSN: 1932-7455

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Official URL: http://pubs.acs.org/doi/abs/10.1021/jp071163d

Abstract

Electrical resistivity studies on mischmetal-substituted, C15 type AB2 alloy (Mm0.2Tb0.8Co2) hydrides with varied hydrogen interstitial concentrations have been carried out in the temperature range 80−300 K. Hydrogen concentration-dependent metal-semiconductor-like transition has been observed and explained based on the charge transfer between hydrogen and the 3d band and the reduction in 6S component of the electron density. Polycrystalline thin film of the alloy capped with palladium has been obtained by electron beam evaporation technique on clean glass substrates. Switching properties from reflecting to a transparent state by electrochemical polarization in an alkaline electrolyte of pH 13 at room temperature have been investigated. In addition, the cyclic durability of the films has been studied and compared with that of rare-earth-based switchable mirror films. Preferential interstitial site occupancy for the hydrogen atoms has been analyzed based on the curent voltage characteristics of alloy thin film.

Item Type:Article
Subjects:Physical Science > Nanophysics
Physical Science > Nano objects
Material Science > Nanochemistry
Material Science > Nanostructured materials
Divisions:Faculty of Engineering, Science and Mathematics > School of Physics
Faculty of Engineering, Science and Mathematics > School of Chemistry
ID Code:6504
Deposited By:JNCASR
Deposited On:30 Jul 2009 07:13
Last Modified:30 Jul 2009 07:13

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