Achieving Surface Sensitivity in Ultrafast XUV Spectroscopy: M2,3-Edge Reflection–Absorption of Transition Metal Oxides

Cirri, Anthony; Husek, Jakub; Biswas, Somnath; Baker, L. Robert

doi:10.1021/acs.jpcc.7b05127

Title: Achieving Surface Sensitivity in Ultrafast XUV Spectroscopy: M_2,3-Edge Reflection–Absorption of Transition Metal Oxides

Abstract

Ultrafast extreme ultraviolet (XUV) spectroscopy is a powerful tool for probing electronic structure and charge carrier dynamics in catalytic materials because of its elemental, oxidation, coordination, and electronic spin-state sensitivity. To extend the benefits of this technique to investigating charge carrier dynamics at surfaces, we have developed near grazing-angle XUV reflection–absorption (RA) spectroscopy. Because RA spectra probe both the real (i.e., reflection) and the imaginary (i.e., attenuation) parts of the refractive index, a general method is required to analyze RA spectra. Using semiempirical calculations, we demonstrate that XUV RA spectra of first row transition metal oxides retain the element and chemical state specificity of XUV absorption spectroscopy. Finally, we find that the imaginary part of the refractive index reports on the chemical state of the metal center, while the real part is additionally sensitive to the surface morphology of the material.

Authors:

^[1];

^[1]; Biswas, Somnath ^[1];

^[1]

The Ohio State Univ., Columbus, OH (United States)

Publication Date:: Wed Jun 28 00:00:00 EDT 2017

Research Org.:: The Ohio State Univ., Columbus, OH (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences, and Biosciences Division; US Air Force Office of Scientific Research (AFOSR)

OSTI Identifier:: 1594147

Grant/Contract Number:: SC0014051; FA9550-15-1-0204

Resource Type:: Accepted Manuscript

Journal Name:: Journal of Physical Chemistry. C

Additional Journal Information:: Journal Volume: 121; Journal Issue: 29; Journal ID: ISSN 1932-7447

Publisher:: American Chemical Society

Country of Publication:: United States

Language:: English

Subject:: 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; oxides; surface morphology; optical properties; quantum mechanics materials

Citation Formats


                    Cirri, Anthony, Husek, Jakub, Biswas, Somnath, and Baker, L. Robert. Achieving Surface Sensitivity in Ultrafast XUV Spectroscopy: M2,3-Edge Reflection–Absorption of Transition Metal Oxides.  United States: N. p., 2017. 
Web.  doi:10.1021/acs.jpcc.7b05127.

Copy to clipboard


                    Cirri, Anthony, Husek, Jakub, Biswas, Somnath, & Baker, L. Robert. Achieving Surface Sensitivity in Ultrafast XUV Spectroscopy: M2,3-Edge Reflection–Absorption of Transition Metal Oxides.  United States.  https://doi.org/10.1021/acs.jpcc.7b05127

Copy to clipboard


                    Cirri, Anthony, Husek, Jakub, Biswas, Somnath, and Baker, L. Robert. Wed .  
"Achieving Surface Sensitivity in Ultrafast XUV Spectroscopy: M2,3-Edge Reflection–Absorption of Transition Metal Oxides".  United States.  https://doi.org/10.1021/acs.jpcc.7b05127.  https://www.osti.gov/servlets/purl/1594147.

Copy to clipboard


                    
@article{osti_1594147,

  title        = {Achieving Surface Sensitivity in Ultrafast XUV Spectroscopy: M2,3-Edge Reflection–Absorption of Transition Metal Oxides},

  author       = {Cirri, Anthony and Husek, Jakub and Biswas, Somnath and Baker, L. Robert},

  abstractNote = {Ultrafast extreme ultraviolet (XUV) spectroscopy is a powerful tool for probing electronic structure and charge carrier dynamics in catalytic materials because of its elemental, oxidation, coordination, and electronic spin-state sensitivity. To extend the benefits of this technique to investigating charge carrier dynamics at surfaces, we have developed near grazing-angle XUV reflection–absorption (RA) spectroscopy. Because RA spectra probe both the real (i.e., reflection) and the imaginary (i.e., attenuation) parts of the refractive index, a general method is required to analyze RA spectra. Using semiempirical calculations, we demonstrate that XUV RA spectra of first row transition metal oxides retain the element and chemical state specificity of XUV absorption spectroscopy. Finally, we find that the imaginary part of the refractive index reports on the chemical state of the metal center, while the real part is additionally sensitive to the surface morphology of the material.},

  doi          = {10.1021/acs.jpcc.7b05127},

  journal      = {Journal of Physical Chemistry. C},

  number       = 29,

  volume       = 121,

  place        = {United States},

  year         = {Wed Jun 28 00:00:00 EDT 2017},

  month        = {Wed Jun 28 00:00:00 EDT 2017}

}

Copy to clipboard

Journal Article:

Free Publicly Available Full Text

Accepted Manuscript (DOE)

Publisher's Version of Record

https://doi.org/10.1021/acs.jpcc.7b05127

Other availability

Search WorldCat to find libraries that may hold this journal

Citation Metrics:

Cited by: 29 works

Citation information provided by
Web of Science

Save / Share:

Export Metadata

Save to My Library

Works referenced in this record:

Ultrafast Carrier Dynamics in Hematite Films: The Role of Photoexcited Electrons in the Transient Optical Response
journal, October 2014

Sorenson, Shayne; Driscoll, Eric; Haghighat, Shima
The Journal of Physical Chemistry C, Vol. 118, Issue 41
DOI: 10.1021/jp508273f

Revealing the Relationship between Semiconductor Electronic Structure and Electron Transfer Dynamics at Metal Oxide–Chromophore Interfaces
journal, November 2013

Knauf, Robin R.; Brennaman, M. Kyle; Alibabaei, Leila
The Journal of Physical Chemistry C, Vol. 117, Issue 48
DOI: 10.1021/jp407587r

Finding the Way to Solar Fuels with Dye-Sensitized Photoelectrosynthesis Cells
journal, September 2016

Brennaman, M. Kyle; Dillon, Robert J.; Alibabaei, Leila
Journal of the American Chemical Society, Vol. 138, Issue 40
DOI: 10.1021/jacs.6b06466

Charge-State Control of Mn ²⁺ Spin Relaxation Dynamics in Colloidal n -Type Zn _{1– x} Mn _x O Nanocrystals
journal, April 2015

Schimpf, Alina M.; Rinehart, Jeffrey D.; Ochsenbein, Stefan T.
The Journal of Physical Chemistry Letters, Vol. 6, Issue 9
DOI: 10.1021/acs.jpclett.5b00621

Multiplet effects in X-ray spectroscopy
journal, January 2005

Groot, Frank de
Coordination Chemistry Reviews, Vol. 249, Issue 1-2
DOI: 10.1016/j.ccr.2004.03.018

Shrinking the Synchrotron: Tabletop Extreme Ultraviolet Absorption of Transition-Metal Complexes
journal, August 2016

Zhang, Kaili; Lin, Ming-Fu; Ryland, Elizabeth S.
The Journal of Physical Chemistry Letters, Vol. 7, Issue 17
DOI: 10.1021/acs.jpclett.6b01393

Characterization of Photo-Induced Charge Transfer and Hot Carrier Relaxation Pathways in Spinel Cobalt Oxide (Co ₃ O ₄ )
journal, September 2014

Jiang, Chang-Ming; Baker, L. Robert; Lucas, J. Matthew
The Journal of Physical Chemistry C, Vol. 118, Issue 39
DOI: 10.1021/jp5071133

Charge Carrier Dynamics of Photoexcited Co ₃ O ₄ in Methanol: Extending High Harmonic Transient Absorption Spectroscopy to Liquid Environments
journal, September 2014

Baker, L. Robert; Jiang, Chang-Ming; Kelly, Stephen T.
Nano Letters, Vol. 14, Issue 10
DOI: 10.1021/nl502817a

Femtosecond M _2,3 -Edge Spectroscopy of Transition-Metal Oxides: Photoinduced Oxidation State Change in α-Fe ₂ O ₃
journal, October 2013

Vura-Weis, Josh; Jiang, Chang-Ming; Liu, Chong
The Journal of Physical Chemistry Letters, Vol. 4, Issue 21
DOI: 10.1021/jz401997d

Femtosecond Extreme Ultraviolet Photoemission Spectroscopy: Observation of Ultrafast Charge Transfer at the n-TiO ₂ /p-Si(100) Interface with Controlled TiO ₂ Oxygen Vacancies
journal, January 2016

Vaida, Mihai E.; Leone, Stephen R.
The Journal of Physical Chemistry C, Vol. 120, Issue 5
DOI: 10.1021/acs.jpcc.5b11161

Dispersion versus absorption: spectral line shape analysis for radiofrequency and microwave spectrometry
journal, May 1978

Marshall, Alan G.; Roe, D. Christopher.
Analytical Chemistry, Vol. 50, Issue 6
DOI: 10.1021/ac50027a023

Chapter 9. Conduction electron spin resonance in metallic systems
journal, January 1985

Edmonds, R. N.; Harrison, M. R.; Edwards, P. P.
Annual Reports Section "C" (Physical Chemistry), Vol. 82
DOI: 10.1039/pc9858200265

Distortions of Band Shapes in External Reflection Infrared Spectra of Thin Polymer Films on Metal Substrates
journal, November 1978

Allara, D. L.; Baca, A.; Pryde, C. A.
Macromolecules, Vol. 11, Issue 6
DOI: 10.1021/ma60066a028

Investigation of Surface Structures of Supported Vanadium Oxide Catalysts by UV−vis−NIR Diffuse Reflectance Spectroscopy
journal, February 2000

Gao, Xingtao; Wachs, Israel E.
The Journal of Physical Chemistry B, Vol. 104, Issue 6
DOI: 10.1021/jp992867t

High-order laser harmonics and synchrotron study of transition metals $M_{2, 3}$ edges
journal, March 2006

Berlasso, R.; Dallera, C.; Borgatti, F.
Physical Review B, Vol. 73, Issue 11
DOI: 10.1103/PhysRevB.73.115101

Band-gap measurements of bulk and nanoscale hematite by soft x-ray spectroscopy
journal, January 2009

Gilbert, B.; Frandsen, C.; Maxey, E. R.
Physical Review B, Vol. 79, Issue 3
DOI: 10.1103/PhysRevB.79.035108

Rate Law Analysis of Water Oxidation on a Hematite Surface
journal, May 2015

Le Formal, Florian; Pastor, Ernest; Tilley, S. David
Journal of the American Chemical Society, Vol. 137, Issue 20
DOI: 10.1021/jacs.5b02576

Photoelectrochemical CO ₂ Reduction to Acetate on Iron–Copper Oxide Catalysts
journal, December 2016

Yang, Xin; Fugate, Elizabeth A.; Mueanngern, Yutichai
ACS Catalysis, Vol. 7, Issue 1
DOI: 10.1021/acscatal.6b02984

Surface-roughness effects on the determination of optical properties of materials by the reflection method
journal, January 1991

Stagg, B. J.; Charalampopoulos, T. T.
Applied Optics, Vol. 30, Issue 28
DOI: 10.1364/AO.30.004113

Influence of surface roughness on near-surface depth analysis from X-ray reflectivity measurements
journal, September 2010

Fujii, Yoshikazu
Surface and Interface Analysis, Vol. 42, Issue 10-11
DOI: 10.1002/sia.3600

Line shape distortion effects in infrared spectroscopy
journal, January 2012

Miljković, Miloš; Bird, Benjamin; Diem, Max
The Analyst, Vol. 137, Issue 17
DOI: 10.1039/c2an35582e

The CTM4XAS program for EELS and XAS spectral shape analysis of transition metal L edges
journal, October 2010

Stavitski, Eli; de Groot, Frank M. F.
Micron, Vol. 41, Issue 7
DOI: 10.1016/j.micron.2010.06.005

Role of Catalyst on Refractive Index Tunability of Porous Silica Antireflective Coatings by Sol−Gel Technique
journal, June 2007

Vincent, Abhilash; Babu, Suresh; Brinley, Erik
The Journal of Physical Chemistry C, Vol. 111, Issue 23
DOI: 10.1021/jp0700736

Influence of annealing temperature on the properties of titanium oxide thin film
journal, September 2003

Hou, Ya-Qi; Zhuang, Da-Ming; Zhang, Gong
Applied Surface Science, Vol. 218, Issue 1-4
DOI: 10.1016/S0169-4332(03)00569-5

dc reactive magnetron sputtering of titanium‐structural and optical characterization of TiO ₂ films
journal, February 1992

Suhail, M. H.; Rao, G. Mohan; Mohan, S.
Journal of Applied Physics, Vol. 71, Issue 3
DOI: 10.1063/1.351264

X-Ray Interactions: Photoabsorption, Scattering, Transmission, and Reflection at E = 50-30,000 eV, Z = 1-92
journal, July 1993

Henke, B. L.; Gullikson, E. M.; Davis, J. C.
Atomic Data and Nuclear Data Tables, Vol. 54, Issue 2, p. 181-342
DOI: 10.1006/adnd.1993.1013

Localized Electronic Excitations in NiO Studied with Resonant Inelastic X-Ray Scattering at the Ni $M$ Threshold: Evidence of Spin Flip
journal, October 2005

Chiuzbăian, S. G.; Ghiringhelli, G.; Dallera, C.
Physical Review Letters, Vol. 95, Issue 19
DOI: 10.1103/PhysRevLett.95.197402

Ti 2p X-ray absorption in titanium dioxides (TiO ₂ ): the influence of the cation site environment
journal, December 1994

Crocombette, J. P.; Jollet, F.
Journal of Physics: Condensed Matter, Vol. 6, Issue 49
DOI: 10.1088/0953-8984/6/49/022

Interaction and ordering of vacancy defects in NiO
journal, April 2008

Park, Sohee; Ahn, Hyo-Shin; Lee, Choong-Ki
Physical Review B, Vol. 77, Issue 13
DOI: 10.1103/PhysRevB.77.134103

X-ray photoelectron spectroscopic chemical state quantification of mixed nickel metal, oxide and hydroxide systems
journal, April 2009

Biesinger, Mark C.; Payne, Brad P.; Lau, Leo W. M.
Surface and Interface Analysis, Vol. 41, Issue 4
DOI: 10.1002/sia.3026

New interpretations of XPS spectra of nickel metal and oxides
journal, May 2006

Grosvenor, Andrew P.; Biesinger, Mark C.; Smart, Roger St. C.
Surface Science, Vol. 600, Issue 9
DOI: 10.1016/j.susc.2006.01.041

Electronic structures of NiO, CoO, and FeO studied by 2 p core-level x-ray photoelectron spectroscopy
journal, June 1991

Lee, Geunseop; Oh, S. -J.
Physical Review B, Vol. 43, Issue 18
DOI: 10.1103/PhysRevB.43.14674

Band gaps and electronic structure of transition-metal compounds
journal, July 1985

Zaanen, J.; Sawatzky, G. A.; Allen, J. W.
Physical Review Letters, Vol. 55, Issue 4
DOI: 10.1103/PhysRevLett.55.418

Direct probe of Mott-Hubbard to charge-transfer insulator transition and electronic structure evolution in transition-metal systems
journal, June 2011

Olalde-Velasco, P.; Jiménez-Mier, J.; Denlinger, J. D.
Physical Review B, Vol. 83, Issue 24
DOI: 10.1103/PhysRevB.83.241102

Accurate screened exchange band structures for the transition metal monoxides MnO, FeO, CoO and NiO
journal, April 2013

Gillen, Roland; Robertson, John
Journal of Physics: Condensed Matter, Vol. 25, Issue 16
DOI: 10.1088/0953-8984/25/16/165502

Mapping of the Photoinduced Electron Traps in TiO ₂ by Picosecond X-ray Absorption Spectroscopy
journal, May 2014

Rittmann-Frank, M. Hannelore; Milne, Chris J.; Rittmann, Jochen
Angewandte Chemie International Edition, Vol. 53, Issue 23
DOI: 10.1002/anie.201310522

Femtosecond X-ray absorption study of electron localization in photoexcited anatase TiO2
journal, October 2015

Santomauro, F. G.; Lübcke, A.; Rittmann, J.
Scientific Reports, Vol. 5, Issue 1
DOI: 10.1038/srep14834

Oxygen vacancies in transition metal and rare earth oxides: Current state of understanding and remaining challenges
journal, June 2007

Ganduglia-Pirovano, M. Verónica; Hofmann, Alexander; Sauer, Joachim
Surface Science Reports, Vol. 62, Issue 6
DOI: 10.1016/j.surfrep.2007.03.002

Control of Charge Carriers Trapping and Relaxation in Hematite by Oxygen Vacancy Charge: Ab Initio Non-adiabatic Molecular Dynamics
journal, May 2017

Zhou, Zhaohui; Liu, Jin; Long, Run
Journal of the American Chemical Society, Vol. 139, Issue 19
DOI: 10.1021/jacs.7b02121

Works referencing / citing this record:

Identifying the acceptor state in NiO hole collection layers: direct observation of exciton dissociation and interfacial hole transfer across a Fe ₂ O ₃ /NiO heterojunction
journal, January 2018

Biswas, Somnath; Husek, Jakub; Londo, Stephen
Physical Chemistry Chemical Physics, Vol. 20, Issue 38
DOI: 10.1039/c8cp04502j

Controlling polaron formation at hematite surfaces by molecular functionalization probed by XUV reflection-absorption spectroscopy
journal, September 2019

Biswas, Somnath; Wallentine, Spencer; Bandaranayake, Savini
The Journal of Chemical Physics, Vol. 151, Issue 10
DOI: 10.1063/1.5115163

Transient absorption spectroscopy using high harmonic generation: a review of ultrafast X-ray dynamics in molecules and solids
journal, April 2019

Geneaux, Romain; Marroux, Hugo J. B.; Guggenmos, Alexander
Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, Vol. 377, Issue 2145
DOI: 10.1098/rsta.2017.0463

Retrieval of the complex-valued refractive index of germanium near the M _4,5 absorption edge
journal, January 2019

Kaplan, Christopher J.; Kraus, Peter M.; Gullikson, Eric M.
Journal of the Optical Society of America B, Vol. 36, Issue 6
DOI: 10.1364/josab.36.001716

Similar Records in DOE PAGES and OSTI.GOV collections:

Elucidating ultrafast electron dynamics at surfaces using extreme ultraviolet (XUV) reflection–absorption spectroscopy

Journal Article Biswas, Somnath ; Husek, Jakub ; Baker, L. Robert - ChemComm

Here we review the recent development of extreme ultraviolet reflection–absorption (XUV-RA) spectroscopy. This method combines the benefits of X-ray absorption spectroscopy, such as element, oxidation, and spin state specificity, with surface sensitivity and ultrafast time resolution, having a probe depth of only a few nm and an instrument response less than 100 fs. Using this technique we investigated the ultrafast electron dynamics at a hematite (α-Fe₂O₃) surface. Surface electron trapping and small polaron formation both occur in 660 fs following photoexcitation. These kinetics are independent of surface morphology indicating that electron trapping is not mediated by defects. Instead, small polaronmore »« less
Cited by 21
https://doi.org/10.1039/c8cc01745j

Full Text Available
Surface electron dynamics in hematite (α-Fe ₂ O ₃ ): correlation between ultrafast surface electron trapping and small polaron formation

Journal Article Husek, Jakub ; Cirri, Anthony ; Biswas, Somnath ; ... - Chemical Science

Spectroscopically following charge carrier dynamics in catalytic materials has proven to be a difficult task due to the ultrafast timescales involved in charge trapping and the lack of spectroscopic tools available to selectively probe surface electronic structure. Transient extreme ultraviolet reflection-absorption (XUV-RA) spectroscopy is able to follow surface electron dynamics due to its element, oxidation-state, and surface specificity, as well as the ultrafast time-resolution which can be achieved with XUV pulses produced by high harmonic generation. Here, we use ultrafast XUV-RA spectroscopy to show that charge localization and small polaron formation in Fe₂O₃ occur within ~660 fs. The photoexcitation ofmore »« less
Cited by 57
https://doi.org/10.1039/C7SC02826A
Identifying the acceptor state in NiO hole collection layers: direct observation of exciton dissociation and interfacial hole transfer across a Fe₂O₃/NiO heterojunction

Journal Article Biswas, Somnath ; Husek, Jakub ; Londo, Stephen ; ... - Physical Chemistry Chemical Physics. PCCP

NiO is widely utilized as a hole transport layer in solar energy devices where light absorption in a photoactive layer is followed by charge separation and hole injection into a NiO collection layer. Due to the complex electronic structure of the hybridized valence band in NiO, the chemical nature of the hole acceptor state has remained an open question, despite the fact that hole localization in this material significantly influences device efficiency. To comment on this, we present results of ultrafast charge carrier dynamics in a NiO based model heterojunction (Fe₂O₃/NiO) using extreme ultraviolet reflection–absorption (XUV-RA) spectroscopy. Element specific XUV-RAmore »« less
Cited by 23
https://doi.org/10.1039/c8cp04502j

Full Text Available
Small Polarons and Surface Defects in Metal Oxide Photocatalysts Studied Using XUV Reflection–Absorption Spectroscopy

Journal Article Bandaranayake, Savini ; Hruska, Emily ; Londo, Stephen ; ... - Journal of Physical Chemistry. C

In photocatalytic transition metal oxides, the surface electronic structure and carrier kinetics are complicated by both charge trapping at defects and self-trapping by small polaron formation. These effects are specific to both the material and the type of defect or surface states involved. Here we review recent studies on ultrafast photoexcited charge carrier dynamics at the surfaces of alpha-Fe₂O₃ (hematite) and NiO and at the interface of a alpha-Fe₂O₃/NiO heterojunction using extreme ultraviolet (XUV) reflection-absorption spectroscopy. We study dynamics of small polaron formation at hematite surfaces showing that the rate of carrier self-trapping is slower than in the bulk duemore »« less
https://doi.org/10.1021/acs.jpcc.0c07047

Full Text Available
Time-resolved THz studies of carrier dynamics in semiconductors, superconductors, and strongly-correlated electron materials

Book Kaindl, Robert A ; Averitt, Richard D

Perhaps the most important aspect of contemporary condensed matter physics involves understanding strong Coulomb interactions between the large number of electrons in a solid. Electronic correlations lead to the emergence of new system properties, such as metal-insulator transitions, superconductivity, magneto-resistance, Bose-Einstein condensation, the formation of excitonic gases, or the integer and fractional Quantum Hall effects. The discovery of high-Tc superconductivity in particular was a watershed event, leading to dramatic experimental and theoretical advances in the field of correlated-electron systems. Such materials often exhibit competition between the charge, lattice, spin, and orbital degrees of freedom, whose cause-effect relationships are difficult tomore »« less
Full Text Available

Similar Records

Title: Achieving Surface Sensitivity in Ultrafast XUV Spectroscopy: M2,3-Edge Reflection–Absorption of Transition Metal Oxides

Abstract

Citation Formats

Ultrafast Carrier Dynamics in Hematite Films: The Role of Photoexcited Electrons in the Transient Optical Response journal, October 2014

Revealing the Relationship between Semiconductor Electronic Structure and Electron Transfer Dynamics at Metal Oxide–Chromophore Interfaces journal, November 2013

Finding the Way to Solar Fuels with Dye-Sensitized Photoelectrosynthesis Cells journal, September 2016

Charge-State Control of Mn 2+ Spin Relaxation Dynamics in Colloidal n -Type Zn 1– x Mn x O Nanocrystals journal, April 2015

Multiplet effects in X-ray spectroscopy journal, January 2005

Shrinking the Synchrotron: Tabletop Extreme Ultraviolet Absorption of Transition-Metal Complexes journal, August 2016

Characterization of Photo-Induced Charge Transfer and Hot Carrier Relaxation Pathways in Spinel Cobalt Oxide (Co 3 O 4 ) journal, September 2014

Charge Carrier Dynamics of Photoexcited Co 3 O 4 in Methanol: Extending High Harmonic Transient Absorption Spectroscopy to Liquid Environments journal, September 2014

Femtosecond M 2,3 -Edge Spectroscopy of Transition-Metal Oxides: Photoinduced Oxidation State Change in α-Fe 2 O 3 journal, October 2013

Femtosecond Extreme Ultraviolet Photoemission Spectroscopy: Observation of Ultrafast Charge Transfer at the n-TiO 2 /p-Si(100) Interface with Controlled TiO 2 Oxygen Vacancies journal, January 2016

Dispersion versus absorption: spectral line shape analysis for radiofrequency and microwave spectrometry journal, May 1978

Chapter 9. Conduction electron spin resonance in metallic systems journal, January 1985

Distortions of Band Shapes in External Reflection Infrared Spectra of Thin Polymer Films on Metal Substrates journal, November 1978

Investigation of Surface Structures of Supported Vanadium Oxide Catalysts by UV−vis−NIR Diffuse Reflectance Spectroscopy journal, February 2000

High-order laser harmonics and synchrotron study of transition metals M 2 , 3 edges journal, March 2006

Band-gap measurements of bulk and nanoscale hematite by soft x-ray spectroscopy journal, January 2009

Rate Law Analysis of Water Oxidation on a Hematite Surface journal, May 2015

Photoelectrochemical CO 2 Reduction to Acetate on Iron–Copper Oxide Catalysts journal, December 2016

Surface-roughness effects on the determination of optical properties of materials by the reflection method journal, January 1991

Influence of surface roughness on near-surface depth analysis from X-ray reflectivity measurements journal, September 2010

Line shape distortion effects in infrared spectroscopy journal, January 2012

The CTM4XAS program for EELS and XAS spectral shape analysis of transition metal L edges journal, October 2010

Role of Catalyst on Refractive Index Tunability of Porous Silica Antireflective Coatings by Sol−Gel Technique journal, June 2007

Influence of annealing temperature on the properties of titanium oxide thin film journal, September 2003

dc reactive magnetron sputtering of titanium‐structural and optical characterization of TiO 2 films journal, February 1992

X-Ray Interactions: Photoabsorption, Scattering, Transmission, and Reflection at E = 50-30,000 eV, Z = 1-92 journal, July 1993

Localized Electronic Excitations in NiO Studied with Resonant Inelastic X-Ray Scattering at the Ni M Threshold: Evidence of Spin Flip journal, October 2005

Ti 2p X-ray absorption in titanium dioxides (TiO 2 ): the influence of the cation site environment journal, December 1994

Interaction and ordering of vacancy defects in NiO journal, April 2008

X-ray photoelectron spectroscopic chemical state quantification of mixed nickel metal, oxide and hydroxide systems journal, April 2009

New interpretations of XPS spectra of nickel metal and oxides journal, May 2006

Electronic structures of NiO, CoO, and FeO studied by 2 p core-level x-ray photoelectron spectroscopy journal, June 1991

Band gaps and electronic structure of transition-metal compounds journal, July 1985

Direct probe of Mott-Hubbard to charge-transfer insulator transition and electronic structure evolution in transition-metal systems journal, June 2011

Accurate screened exchange band structures for the transition metal monoxides MnO, FeO, CoO and NiO journal, April 2013

Mapping of the Photoinduced Electron Traps in TiO 2 by Picosecond X-ray Absorption Spectroscopy journal, May 2014

Femtosecond X-ray absorption study of electron localization in photoexcited anatase TiO2 journal, October 2015

Oxygen vacancies in transition metal and rare earth oxides: Current state of understanding and remaining challenges journal, June 2007

Control of Charge Carriers Trapping and Relaxation in Hematite by Oxygen Vacancy Charge: Ab Initio Non-adiabatic Molecular Dynamics journal, May 2017

Identifying the acceptor state in NiO hole collection layers: direct observation of exciton dissociation and interfacial hole transfer across a Fe 2 O 3 /NiO heterojunction journal, January 2018

Controlling polaron formation at hematite surfaces by molecular functionalization probed by XUV reflection-absorption spectroscopy journal, September 2019

Transient absorption spectroscopy using high harmonic generation: a review of ultrafast X-ray dynamics in molecules and solids journal, April 2019

Retrieval of the complex-valued refractive index of germanium near the M 4,5 absorption edge journal, January 2019

Title: Achieving Surface Sensitivity in Ultrafast XUV Spectroscopy: M_2,3-Edge Reflection–Absorption of Transition Metal Oxides

Ultrafast Carrier Dynamics in Hematite Films: The Role of Photoexcited Electrons in the Transient Optical Response
journal, October 2014

Revealing the Relationship between Semiconductor Electronic Structure and Electron Transfer Dynamics at Metal Oxide–Chromophore Interfaces
journal, November 2013

Finding the Way to Solar Fuels with Dye-Sensitized Photoelectrosynthesis Cells
journal, September 2016

Charge-State Control of Mn ²⁺ Spin Relaxation Dynamics in Colloidal n -Type Zn _{1– x} Mn _x O Nanocrystals
journal, April 2015

Multiplet effects in X-ray spectroscopy
journal, January 2005

Shrinking the Synchrotron: Tabletop Extreme Ultraviolet Absorption of Transition-Metal Complexes
journal, August 2016

Characterization of Photo-Induced Charge Transfer and Hot Carrier Relaxation Pathways in Spinel Cobalt Oxide (Co ₃ O ₄ )
journal, September 2014

Charge Carrier Dynamics of Photoexcited Co ₃ O ₄ in Methanol: Extending High Harmonic Transient Absorption Spectroscopy to Liquid Environments
journal, September 2014

Femtosecond M _2,3 -Edge Spectroscopy of Transition-Metal Oxides: Photoinduced Oxidation State Change in α-Fe ₂ O ₃
journal, October 2013

Femtosecond Extreme Ultraviolet Photoemission Spectroscopy: Observation of Ultrafast Charge Transfer at the n-TiO ₂ /p-Si(100) Interface with Controlled TiO ₂ Oxygen Vacancies
journal, January 2016

Dispersion versus absorption: spectral line shape analysis for radiofrequency and microwave spectrometry
journal, May 1978

Chapter 9. Conduction electron spin resonance in metallic systems
journal, January 1985

Distortions of Band Shapes in External Reflection Infrared Spectra of Thin Polymer Films on Metal Substrates
journal, November 1978

Investigation of Surface Structures of Supported Vanadium Oxide Catalysts by UV−vis−NIR Diffuse Reflectance Spectroscopy
journal, February 2000

High-order laser harmonics and synchrotron study of transition metals $M_{2, 3}$ edges
journal, March 2006

Band-gap measurements of bulk and nanoscale hematite by soft x-ray spectroscopy
journal, January 2009

Rate Law Analysis of Water Oxidation on a Hematite Surface
journal, May 2015

Photoelectrochemical CO ₂ Reduction to Acetate on Iron–Copper Oxide Catalysts
journal, December 2016

Surface-roughness effects on the determination of optical properties of materials by the reflection method
journal, January 1991

Influence of surface roughness on near-surface depth analysis from X-ray reflectivity measurements
journal, September 2010

Line shape distortion effects in infrared spectroscopy
journal, January 2012

The CTM4XAS program for EELS and XAS spectral shape analysis of transition metal L edges
journal, October 2010

Role of Catalyst on Refractive Index Tunability of Porous Silica Antireflective Coatings by Sol−Gel Technique
journal, June 2007

Influence of annealing temperature on the properties of titanium oxide thin film
journal, September 2003

dc reactive magnetron sputtering of titanium‐structural and optical characterization of TiO ₂ films
journal, February 1992

X-Ray Interactions: Photoabsorption, Scattering, Transmission, and Reflection at E = 50-30,000 eV, Z = 1-92
journal, July 1993

Localized Electronic Excitations in NiO Studied with Resonant Inelastic X-Ray Scattering at the Ni $M$ Threshold: Evidence of Spin Flip
journal, October 2005

Ti 2p X-ray absorption in titanium dioxides (TiO ₂ ): the influence of the cation site environment
journal, December 1994

Interaction and ordering of vacancy defects in NiO
journal, April 2008

X-ray photoelectron spectroscopic chemical state quantification of mixed nickel metal, oxide and hydroxide systems
journal, April 2009

New interpretations of XPS spectra of nickel metal and oxides
journal, May 2006

Electronic structures of NiO, CoO, and FeO studied by 2 p core-level x-ray photoelectron spectroscopy
journal, June 1991

Band gaps and electronic structure of transition-metal compounds
journal, July 1985

Direct probe of Mott-Hubbard to charge-transfer insulator transition and electronic structure evolution in transition-metal systems
journal, June 2011

Accurate screened exchange band structures for the transition metal monoxides MnO, FeO, CoO and NiO
journal, April 2013

Mapping of the Photoinduced Electron Traps in TiO ₂ by Picosecond X-ray Absorption Spectroscopy
journal, May 2014

Femtosecond X-ray absorption study of electron localization in photoexcited anatase TiO2
journal, October 2015

Oxygen vacancies in transition metal and rare earth oxides: Current state of understanding and remaining challenges
journal, June 2007

Control of Charge Carriers Trapping and Relaxation in Hematite by Oxygen Vacancy Charge: Ab Initio Non-adiabatic Molecular Dynamics
journal, May 2017

Identifying the acceptor state in NiO hole collection layers: direct observation of exciton dissociation and interfacial hole transfer across a Fe ₂ O ₃ /NiO heterojunction
journal, January 2018

Controlling polaron formation at hematite surfaces by molecular functionalization probed by XUV reflection-absorption spectroscopy
journal, September 2019

Transient absorption spectroscopy using high harmonic generation: a review of ultrafast X-ray dynamics in molecules and solids
journal, April 2019

Retrieval of the complex-valued refractive index of germanium near the M _4,5 absorption edge
journal, January 2019