XPS primary excitation spectra of Zn 2p, Fe 2p, and Ce 3d from ZnO, α-Fe2O3, and CeO2

Nicolas Pauly*, Francisco Yubero, Juan Pedro Espinós, Sven Tougaard

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Metal oxides are important for current development in nanotechnology. X-ray photoelectron spectroscopy(XPS) is a widely used technique to study the oxidation states of metals, and a basic understanding of the photoexcitation process is important to obtain the full information from XPS. We have studied core level excitations of Zn 2p, Fe 2p, and Ce 3d photoelectron emissions from ZnO, α-Fe2O3, and CeO2. Using an effective energy-differential XPS inelastic-scattering cross section evaluated within the semiclassical dielectric response model for XPS, we analysed the experimental spectra to determine the corresponding primary excitation spectra, ie, the initial excitation processes. We find that simple emission (Zn 2p) as well as complex multiplet photoemission spectra (Fe 2p and Ce 3d) can be quantitatively analysed with our procedure. Moreover, for α-Fe2O3, it is possible to use the software package CTM4XAS (Charge Transfer Multiplet program for X-ray Absorption Spectroscopy) to calculate its primary excitation spectrum within a quantum mechanical model, and it was found to be in good agreement with the spectrum determined by analysis of the experiment.

Original languageEnglish
JournalSurface and Interface Analysis
Volume51
Issue number3
Pages (from-to)353-360
ISSN0142-2421
DOIs
Publication statusPublished - 1. Mar 2019

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X ray photoelectron spectroscopy
photoelectron spectroscopy
excitation
x rays
Metals
Inelastic scattering
X ray absorption spectroscopy
fine structure
Core levels
Photoexcitation
Photoemission
Photoelectrons
Nanotechnology
Software packages
Oxides
Charge transfer
nanotechnology
photoexcitation
scattering cross sections
metal oxides

Bibliographical note

Early View
Online Version of Record before inclusion in an issue

Keywords

  • background correction
  • CeO
  • oxide
  • photoelectron spectroscopy
  • primary excitation spectrum
  • XPS
  • ZnO
  • α-FeO

Cite this

Pauly, Nicolas ; Yubero, Francisco ; Espinós, Juan Pedro ; Tougaard, Sven. / XPS primary excitation spectra of Zn 2p, Fe 2p, and Ce 3d from ZnO, α-Fe2O3, and CeO2. In: Surface and Interface Analysis. 2019 ; Vol. 51, No. 3. pp. 353-360.
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title = "XPS primary excitation spectra of Zn 2p, Fe 2p, and Ce 3d from ZnO, α-Fe2O3, and CeO2",
abstract = "Metal oxides are important for current development in nanotechnology. X-ray photoelectron spectroscopy(XPS) is a widely used technique to study the oxidation states of metals, and a basic understanding of the photoexcitation process is important to obtain the full information from XPS. We have studied core level excitations of Zn 2p, Fe 2p, and Ce 3d photoelectron emissions from ZnO, α-Fe2O3, and CeO2. Using an effective energy-differential XPS inelastic-scattering cross section evaluated within the semiclassical dielectric response model for XPS, we analysed the experimental spectra to determine the corresponding primary excitation spectra, ie, the initial excitation processes. We find that simple emission (Zn 2p) as well as complex multiplet photoemission spectra (Fe 2p and Ce 3d) can be quantitatively analysed with our procedure. Moreover, for α-Fe2O3, it is possible to use the software package CTM4XAS (Charge Transfer Multiplet program for X-ray Absorption Spectroscopy) to calculate its primary excitation spectrum within a quantum mechanical model, and it was found to be in good agreement with the spectrum determined by analysis of the experiment.",
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XPS primary excitation spectra of Zn 2p, Fe 2p, and Ce 3d from ZnO, α-Fe2O3, and CeO2. / Pauly, Nicolas; Yubero, Francisco; Espinós, Juan Pedro; Tougaard, Sven.

In: Surface and Interface Analysis, Vol. 51, No. 3, 01.03.2019, p. 353-360.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - XPS primary excitation spectra of Zn 2p, Fe 2p, and Ce 3d from ZnO, α-Fe2O3, and CeO2

AU - Pauly, Nicolas

AU - Yubero, Francisco

AU - Espinós, Juan Pedro

AU - Tougaard, Sven

N1 - Early View Online Version of Record before inclusion in an issue

PY - 2019/3/1

Y1 - 2019/3/1

N2 - Metal oxides are important for current development in nanotechnology. X-ray photoelectron spectroscopy(XPS) is a widely used technique to study the oxidation states of metals, and a basic understanding of the photoexcitation process is important to obtain the full information from XPS. We have studied core level excitations of Zn 2p, Fe 2p, and Ce 3d photoelectron emissions from ZnO, α-Fe2O3, and CeO2. Using an effective energy-differential XPS inelastic-scattering cross section evaluated within the semiclassical dielectric response model for XPS, we analysed the experimental spectra to determine the corresponding primary excitation spectra, ie, the initial excitation processes. We find that simple emission (Zn 2p) as well as complex multiplet photoemission spectra (Fe 2p and Ce 3d) can be quantitatively analysed with our procedure. Moreover, for α-Fe2O3, it is possible to use the software package CTM4XAS (Charge Transfer Multiplet program for X-ray Absorption Spectroscopy) to calculate its primary excitation spectrum within a quantum mechanical model, and it was found to be in good agreement with the spectrum determined by analysis of the experiment.

AB - Metal oxides are important for current development in nanotechnology. X-ray photoelectron spectroscopy(XPS) is a widely used technique to study the oxidation states of metals, and a basic understanding of the photoexcitation process is important to obtain the full information from XPS. We have studied core level excitations of Zn 2p, Fe 2p, and Ce 3d photoelectron emissions from ZnO, α-Fe2O3, and CeO2. Using an effective energy-differential XPS inelastic-scattering cross section evaluated within the semiclassical dielectric response model for XPS, we analysed the experimental spectra to determine the corresponding primary excitation spectra, ie, the initial excitation processes. We find that simple emission (Zn 2p) as well as complex multiplet photoemission spectra (Fe 2p and Ce 3d) can be quantitatively analysed with our procedure. Moreover, for α-Fe2O3, it is possible to use the software package CTM4XAS (Charge Transfer Multiplet program for X-ray Absorption Spectroscopy) to calculate its primary excitation spectrum within a quantum mechanical model, and it was found to be in good agreement with the spectrum determined by analysis of the experiment.

KW - background correction

KW - CeO

KW - oxide

KW - photoelectron spectroscopy

KW - primary excitation spectrum

KW - XPS

KW - ZnO

KW - α-FeO

U2 - 10.1002/sia.6587

DO - 10.1002/sia.6587

M3 - Journal article

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VL - 51

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JO - Surface and Interface Analysis

JF - Surface and Interface Analysis

SN - 0142-2421

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