Atomic-Scale Interface for Pt Nanoparticles on SrTiO3 (001)

Yanna Chen; Anusheela Das; Isaiah D. Duplessis; Denis T. Keane; Michael J. Bedzyk

doi:10.1021/acsami.3c19560

Atomic-Scale Interface for Pt Nanoparticles on SrTiO₃ (001)

Yanna Chen, Anusheela Das, Isaiah D. Duplessis, Denis T. Keane, Michael J. Bedzyk^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

The interfacial structure formed by Pt nanoparticles grown epitaxially on a SrTiO₃ (001) surface by pulsed laser deposition was studied by X-ray standing-wave (XSW) excited core-level photoelectron emission. The XSW-generated 3D atomic map of the Pt and interfacial oxygens for the oxidized Pt/SrTiO₃ interface differs significantly from that of the as-deposited interface. After oxidation, the Pt atoms shifted upward and their atomic occupation at fcc-like sites evolved as the oxidation temperature increased. Interfacial oxygen atoms were differentiated from bulk O atoms by the chemical shift in the binding energy of their 1s electrons. After oxidation, the interfacial oxygen atoms rearranged to form a TiO₂ bilayer at the interface. These results provide a more complete description of the strong metal-support interaction process at the interface.

Original language	English (US)
Pages (from-to)	26862-26869
Number of pages	8
Journal	ACS Applied Materials and Interfaces
Volume	16
Issue number	20
DOIs	https://doi.org/10.1021/acsami.3c19560
State	Published - May 22 2024

Keywords

X-ray standing waves
interface
nanoparticles
platinum
strontium titanate

ASJC Scopus subject areas

General Materials Science

Access to Document

10.1021/acsami.3c19560

Cite this

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title = "Atomic-Scale Interface for Pt Nanoparticles on SrTiO3 (001)",

abstract = "The interfacial structure formed by Pt nanoparticles grown epitaxially on a SrTiO3 (001) surface by pulsed laser deposition was studied by X-ray standing-wave (XSW) excited core-level photoelectron emission. The XSW-generated 3D atomic map of the Pt and interfacial oxygens for the oxidized Pt/SrTiO3 interface differs significantly from that of the as-deposited interface. After oxidation, the Pt atoms shifted upward and their atomic occupation at fcc-like sites evolved as the oxidation temperature increased. Interfacial oxygen atoms were differentiated from bulk O atoms by the chemical shift in the binding energy of their 1s electrons. After oxidation, the interfacial oxygen atoms rearranged to form a TiO2 bilayer at the interface. These results provide a more complete description of the strong metal-support interaction process at the interface.",

keywords = "X-ray standing waves, interface, nanoparticles, platinum, strontium titanate",

author = "Yanna Chen and Anusheela Das and Duplessis, {Isaiah D.} and Keane, {Denis T.} and Bedzyk, {Michael J.}",

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T1 - Atomic-Scale Interface for Pt Nanoparticles on SrTiO3 (001)

AU - Chen, Yanna

AU - Das, Anusheela

AU - Duplessis, Isaiah D.

AU - Keane, Denis T.

AU - Bedzyk, Michael J.

PY - 2024/5/22

Y1 - 2024/5/22

N2 - The interfacial structure formed by Pt nanoparticles grown epitaxially on a SrTiO3 (001) surface by pulsed laser deposition was studied by X-ray standing-wave (XSW) excited core-level photoelectron emission. The XSW-generated 3D atomic map of the Pt and interfacial oxygens for the oxidized Pt/SrTiO3 interface differs significantly from that of the as-deposited interface. After oxidation, the Pt atoms shifted upward and their atomic occupation at fcc-like sites evolved as the oxidation temperature increased. Interfacial oxygen atoms were differentiated from bulk O atoms by the chemical shift in the binding energy of their 1s electrons. After oxidation, the interfacial oxygen atoms rearranged to form a TiO2 bilayer at the interface. These results provide a more complete description of the strong metal-support interaction process at the interface.

AB - The interfacial structure formed by Pt nanoparticles grown epitaxially on a SrTiO3 (001) surface by pulsed laser deposition was studied by X-ray standing-wave (XSW) excited core-level photoelectron emission. The XSW-generated 3D atomic map of the Pt and interfacial oxygens for the oxidized Pt/SrTiO3 interface differs significantly from that of the as-deposited interface. After oxidation, the Pt atoms shifted upward and their atomic occupation at fcc-like sites evolved as the oxidation temperature increased. Interfacial oxygen atoms were differentiated from bulk O atoms by the chemical shift in the binding energy of their 1s electrons. After oxidation, the interfacial oxygen atoms rearranged to form a TiO2 bilayer at the interface. These results provide a more complete description of the strong metal-support interaction process at the interface.

KW - X-ray standing waves

KW - interface

KW - nanoparticles

KW - platinum

KW - strontium titanate

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