Evaluating the Internal Structure of Core-Shell Nanoparticles Using X-ray Photoelectron Intensities and Simulated Spectra

The Journal of Physical Chemistry. C, Nanomaterials and Interfaces
M ChudzickiC J Powell

Abstract

The functionality of a new version of the National Institute of Standards and Technology database Simulation of Electron Spectra for Surface Analysis (SESSA) has been extended by implementing a new geometry engine. The engine enables users to simulate Auger-electron spectra and X-ray photoelectron spectra for different predefined morphologies (planar, islands, spheres, multi-layer core-shell particles). We compared shell thicknesses of core-shell nanoparticles derived from core-shell XPS peak intensities using Shard's method, which allows one to estimate shell thicknesses of core-shell nanoparticles, and a series of SESSA simulations for a wide range of nanoparticle dimensions. We obtained very good agreement of the shell thicknesses for cases where elastic scattering within the shell can be neglected, a result that is in accordance with the underlying assumptions of the Shard model. If elastic-scattering effects are important, there can be thickness uncertainties of up to 25 %. Experimental spectra of functionalized gold nanoparticles obtained by Techane et al. were analyzed with SESSA 2.0 both with respect to the relevant peak intensities as well as the spectral shape. Good agreement between experiment and theory was found fo...Continue Reading

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Citations

Apr 19, 2016·Surface and Interface Analysis : SIA·David J H CantAlexander G Shard
Mar 1, 2016·Surface Science·Gilad ZornDavid G Castner
Aug 31, 2016·Microscopy Today·Donald R BaerDavid G Castner
Apr 3, 2016·Analytical and Bioanalytical Chemistry·Pablo Darío QuevedoUte Resch-Genger
Sep 12, 2017·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Marit KjærvikWolfgang E S Unger
Oct 7, 2020·International Journal of Radiation Biology·Roger W Howell
Jun 12, 2018·The Journal of Physical Chemistry. C, Nanomaterials and Interfaces·C J PowellD G Castner
Oct 29, 2019·Chemical Reviews·Jamie A TrindellRichard M Crooks
Feb 1, 2017·The Journal of Physical Chemistry. C, Nanomaterials and Interfaces·C J PowellD G Castner

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