Bulletin of Materials Science

, Volume 31, Issue 3, pp 225–231

Hydrogen-induced electrical and optical switching in Pd capped Pr nanoparticle layers

Authors

  • Shubhra Kala
    • Department of PhysicsIndian Institute of Technology Delhi
    • Department of PhysicsIndian Institute of Technology Delhi
Article

DOI: 10.1007/s12034-008-0040-2

Cite this article as:
Kala, S. & Mehta, B.R. Bull Mater Sci (2008) 31: 225. doi:10.1007/s12034-008-0040-2
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Abstract

In this study, modification in the properties of hydrogen-induced switchable mirror based on Pr nanoparticle layers is reported. The reversible changes in hydrogen-induced electrical and optical properties of Pd capped Pr nanoparticle layers have been studied as a function of hydrogenation time and compared with the conventional device based on Pd capped Pr thin films. Faster electrical and optical response, higher optical contrast and presence of single absorption edge corresponding to Pr trihydride state in hydrogen loaded state have been observed in the case of nanoparticle layers. The improvement in the electrical and optical properties have been explained in terms of blue shift in the absorption edge due to quantum confinement effect, larger number of interparticle boundaries, presence of defects, loose adhesion to the substrate and enhanced surface to volume atom ratio at nanodimension.

Keywords

Praseodymium nanoparticlesswitchable mirrorelectrical and optical properties

Copyright information

© Indian Academy of Sciences 2008