Peak shape analysis of Ag 3d core-level X-ray photoelectron spectra of Au@Ag core-shell nanoparticles using an asymmetric Gaussian-Lorentzian mixed function

Shinya Maenosono, Jaedong Lee, Thi Ngoc Anh Dao, Derrick Michael Mott

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

This article reports on the peak shape analysis of X-ray photoelectron spectra of gold-silver core-shell (Au@Ag) nanoparticles (NPs) using an asymmetric Gaussian-Lorentzian mixed function. Unlike Ag NPs, Au@Ag NPs have no oxide peak and show asymmetric line shape with a high energy tail in Ag 3d core-level spectra. A monotonic increase in the Ag 3d binding energy and a decrease in the degree of asymmetry with increasing the Ag shell thickness were observed supporting the occurrence of charge transfer from Au core to Ag shell.

Original languageEnglish
Pages (from-to)1611-1614
Number of pages4
JournalSurface and Interface Analysis
Volume44
Issue number13
DOIs
Publication statusPublished - 2012 Dec 1
Externally publishedYes

Keywords

  • Gaussian-Lorentzian mixed function
  • XPS
  • asymmetric line shape
  • charge transfer
  • gold
  • nanoparticle
  • silver

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

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