Multiscale theoretical modeling of plasmonic sensing of hydrogen uptake in palladium nanodisks

M. Ameen Poyli, Vyacheslav Mikhaylovich Silkin, I. P. Chernov, P. M. Echenique, R. Díez Muiño, J. Aizpurua

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Abstract

We study theoretically the optical properties of palladium nanodisks during hydrogen uptake. A combination of an ab initio quantum mechanical description of the Pd-H dielectric properties and a full electrodynamical study of light scattering in the H-modified Pd nanodisks allows us to trace the shift of the localized surface plasmon as a function of the H concentration in the Pd-H disk. We follow the evolution of the plasmon peak energy for different admixtures of the Pd-H α and β phases and interpret quantitatively the experimental sensitivity of the plasmon energy shift to the structural inhomogeneity upon H absorption. Our multiscale theoretical framework provides a solid background for plasmonic sensing of structural domains, as well as for identifying H saturation conditions in metal hydride systems.

Original languageEnglish
Pages (from-to)2556-2561
Number of pages6
JournalJournal of Physical Chemistry Letters
Volume3
Issue number18
DOIs
Publication statusPublished - 20 Sep 2012

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Keywords

  • Hard Matter
  • Optical Materials
  • Plasmonics

ASJC Scopus subject areas

  • Materials Science(all)

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