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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
Author(s) -
Maenosono Shinya,
Lee JaeDong,
Dao Anh Thi Ngoc,
Mott Derrick
Publication year - 2012
Publication title -
surface and interface analysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.52
H-Index - 90
eISSN - 1096-9918
pISSN - 0142-2421
DOI - 10.1002/sia.5078
Subject(s) - spectral line , shell (structure) , x ray photoelectron spectroscopy , nanoparticle , asymmetry , gaussian , core (optical fiber) , chemistry , molecular physics , binding energy , gaussian function , analytical chemistry (journal) , materials science , atomic physics , nanotechnology , physics , computational chemistry , nuclear magnetic resonance , composite material , quantum mechanics , chromatography
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. Copyright © 2012 John Wiley & Sons, Ltd.
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