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Title: Resolving local structural motifs across the phase evolution of zinc titanates with computational x-ray absorption spectroscopy

Journal Article · · Physical Review Materials

Resolving the local structure motifs that characterize phase evolution as a function of composition is a key challenge in structure characterization of complex materials. Here, in this study, we combine first-principles simulations and x-ray absorption near-edge structures (XANES) analysis to gain insights into the structure evolution revealed by measurements across a combinatorial zinc titanate thin film, which was grown with smoothly varying composition over a wide range of the Ti:Zn ratio. Specifically, we propose a cluster blind-signal-separation (cBSS) method for XANES spectral analysis based on a library of the structures and spectra of representative local motifs. In addition to motifs from zinc titanate crystals, two types of Ti-defect models constructed in this study are key to the understanding of the structure characteristics in the Zn-rich region. The cBSS method makes use of both spectral clustering of the simulated site-XANES spectra library and the BSS procedure to construct high-fidelity spectral basis functions from an experimental spectral sequence. The method provides a rigorous measure of the spectral sensitivity and basis completeness. The results of the XANES analysis are corroborated with other experimental modalities, including x-ray diffraction and spectroscopic ellipsometry, to validate the cBSS method. The calculated motif weights resulting from fitting the XANES spectra with the cBSS basis probe the atomic structure characteristics of both crystalline and amorphous phases as a function of the Ti/Zn composition. The insights of the local structure motif evolution are pivotal to the understanding of the nonmonotonic trend in the optical gap, which may lead to potential applications through tuning the optical properties of zinc titanate. The workflow of the XANES spectral analysis developed in this work can be generalized to construct the structure-property relationship in a broad material space.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities (SUF)
Grant/Contract Number:
SC0012704
OSTI ID:
2525845
Report Number(s):
BNL--227631-2025-JAAM
Journal Information:
Physical Review Materials, Journal Name: Physical Review Materials Journal Issue: 2 Vol. 9; ISSN 2475-9953
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

References (65)

Dehydrogenation of Isobutane over Zinc Titanate Thin Film Catalysts journal July 1996
Efficiency of ab-initio total energy calculations for metals and semiconductors using a plane-wave basis set journal July 1996
Independent component analysis: algorithms and applications journal June 2000
Multivariate curve resolution: A review of advanced and tailored applications and challenges journal February 2013
Band structures and nitrogen doping effects in zinc titanate photocatalysts journal June 2013
Phase transformation and dielectric properties of sputtering-prepared Zn–Ti–O thin films journal July 2019
On the hydration and hydrolysis of carbon dioxide journal October 2011
Development of photocatalysts for selective and efficient organic transformations journal July 2015
The properties of Ti-doped ZnO films deposited by simultaneous RF and DC magnetron sputtering journal February 2005
Atomic insights into the oxidative degradation mechanisms of sulfide solid electrolytes journal April 2024
The Powder Diffraction File: a quality materials characterization database journal November 2019
Density Functional Theory Based Methods for the Calculation of X-ray Spectroscopy journal July 2020
Resolving the Evolution of Atomic Layer-Deposited Thin-Film Growth by Continuous In Situ X-Ray Absorption Spectroscopy journal February 2021
Robust Machine Learning Inference from X-ray Absorption Near Edge Spectra through Featurization journal March 2024
Understanding X-ray Spectroscopy of Carbonaceous Materials by Combining Experiments, Density Functional Theory, and Machine Learning. Part I: Fingerprint Spectra journal October 2019
Understanding X-ray Spectroscopy of Carbonaceous Materials by Combining Experiments, Density Functional Theory, and Machine Learning. Part II: Quantitative Fitting of Spectra journal October 2019
Core-Level Binding Energies from GW : An Efficient Full-Frequency Approach within a Localized Basis journal August 2018
X-ray Spectroscopy Fingerprints of Pristine and Functionalized Graphene journal August 2021
Harnessing Neural Networks for Elucidating X-ray Absorption Structure–Spectrum Relationships in Amorphous Carbon journal August 2023
Supervised Machine-Learning-Based Determination of Three-Dimensional Structure of Metallic Nanoparticles journal October 2017
Accurate Absolute and Relative Core-Level Binding Energies from GW journal February 2020
Ultrathin Amorphous Titania on Nanowires: Optimization of Conformal Growth and Elucidation of Atomic-Scale Motifs journal April 2019
Multi-Stage Structural Transformations in Zero-Strain Lithium Titanate Unveiled by in Situ X-ray Absorption Fingerprints journal November 2017
Evolution and Eu3+ Doping of Sol−Gel Derived Ternary ZnxTiyOz - Nanocrystals journal January 2010
Global Impact and Balancing Act: Deciphering the Effect of Fluorination on B 1s Binding Energies in Fluorinated h-BN Nanosheets journal May 2024
Learning the parts of objects by non-negative matrix factorization journal October 1999
Precision and efficiency in solid-state pseudopotential calculations journal December 2018
Simulated sulfur K-edge X-ray absorption spectroscopy database of lithium thiophosphate solid electrolytes journal June 2023
High-throughput computational X-ray absorption spectroscopy journal July 2018
A new anode material made of Zn2Ti3O8nanowires: synthesis and electrochemical properties journal January 2010
Solving local structure around dopants in metal nanoparticles with ab initio modeling of X-ray absorption near edge structure journal January 2016
Advances in the ocean-3 spectroscopy package journal January 2022
Oxide ultra-thin films on metals: new materials for the design of supported metal catalysts journal January 2008
Parameter-free calculations of X-ray spectra with FEFF9 journal January 2010
Zinc titanate nanopowder: an advanced nanotechnology based recyclable heterogeneous catalyst for the one-pot selective synthesis of self-aggregated low-molecular mass acceptor–donor–acceptor–acceptor systems and acceptor–donor–acceptor triads journal January 2012
The Analysis of Mixtures: Application of Principal Component Analysis to XAS Spectra journal April 1997
Large and abrupt optical band gap variation in In-doped ZnO journal January 2001
Study of active surface defects in Ti doped ZnO nanoparticles journal June 2010
Observation of the amorphous zinc oxide recrystalline process by molecular dynamics simulation journal February 2013
Commentary: The Materials Project: A materials genome approach to accelerating materials innovation journal July 2013
A high-resolution XAS study of aqueous Cu(II) in liquid and frozen solutions: Pyramidal, polymorphic, and non-centrosymmetric journal February 2015
Effects of domain size on x-ray absorption spectra of boron nitride doped graphenes journal August 2016
QUANTUM ESPRESSO: a modular and open-source software project for quantum simulations of materials journal September 2009
Advanced capabilities for materials modelling with Quantum ESPRESSO journal October 2017
Deciphering phase evolution in complex metal oxide thin films via high-throughput materials synthesis and characterization journal January 2023
A Simplex Method for Function Minimization journal January 1965
Ab initiomolecular dynamics for liquid metals journal January 1993
Efficient iterative schemes for ab initio total-energy calculations using a plane-wave basis set journal October 1996
Ti K -edge XANES studies of Ti coordination and disorder in oxide compounds: Comparison between theory and experiment journal July 1997
First-principles calculations of electron-energy-loss near-edge structure and near-edge x-ray-absorption fine structure of BN polytypes using model clusters journal August 1999
Combined Bethe-Saltpeter equations and time-dependent density-functional theory approach for x-ray absorption calculations journal April 2005
Native point defects in ZnO journal October 2007
Understanding the L 2 , 3 x-ray absorption spectra of early 3 d transition elements journal November 2010
Effects of electron-phonon coupling on absorption spectrum: K edge of hexagonal boron nitride journal December 2018
New Technique for Investigating Noncrystalline Structures: Fourier Analysis of the Extended X-Ray—Absorption Fine Structure journal November 1971
Generalized Gradient Approximation Made Simple journal October 1996
X-Ray Absorption Spectra of Water from First Principles Calculations journal May 2006
Multicode benchmark on simulated Ti K-edge x-ray absorption spectra of Ti-O compounds journal January 2024
Extended x-ray absorption fine structure—its strengths and limitations as a structural tool journal October 1981
Theoretical approaches to x-ray absorption fine structure journal July 2000
Phase Equilibria in the System ZnO-TiO2 journal March 1960
Titanium Incorporation in Zn 2 TiO 4 Spinel Ceramics journal May 2001
Structural, electrical, and optical properties of Ti-doped ZnO films fabricated by atomic layer deposition journal January 2013
Lightshow: a Python package for generating computational x-ray absorption spectroscopy input files journal July 2023
Self Modeling Curve Resolution journal August 1971