Revealing oxidation kinetics of dielectric-embedded Ag nanoparticles via in situ optical microspectroscopy

J. A. Jiménez, M. Sendova, K. McAlpine

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Abstract

The oxidation kinetics of Ag nanoparticles (NPs) embedded in an aluminum oxide film deposited on quartz have been assessed via an in situ real-time monitoring of plasmonic evolution during thermal processing in air. A temperature-dependent exponential decay in the peak intensity of Ag NPs' absorption was revealed, which was analyzed through first-order kinetics. An activation energy of 3.28 (±0.27) × 10 4 J mol -1 was estimated in good agreement with the oxidative dissolution of similar-sized Ag NPs in liquid phase reported by Ho et al. [11]. Results are discussed in the context of mechanistic parallelisms and physico-chemical interactions in the air-atmosphere/nanocomposite-film/substrate system.

Original languageEnglish (US)
Pages (from-to)107-112
Number of pages6
JournalChemical Physics Letters
Volume523
DOIs
Publication statusPublished - Jan 27 2012
Externally publishedYes

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ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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