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Yu X, Cheng Y, Li Y, Polo-Garzon F, Liu J, Mamontov E, Li M, Lennon D, Parker SF, Ramirez-Cuesta AJ, Wu Z. Neutron Scattering Studies of Heterogeneous Catalysis. Chem Rev 2023. [PMID: 37315192 DOI: 10.1021/acs.chemrev.3c00101] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Understanding the structural dynamics/evolution of catalysts and the related surface chemistry is essential for establishing structure-catalysis relationships, where spectroscopic and scattering tools play a crucial role. Among many such tools, neutron scattering, though less-known, has a unique power for investigating catalytic phenomena. Since neutrons interact with the nuclei of matter, the neutron-nucleon interaction provides unique information on light elements (mainly hydrogen), neighboring elements, and isotopes, which are complementary to X-ray and photon-based techniques. Neutron vibrational spectroscopy has been the most utilized neutron scattering approach for heterogeneous catalysis research by providing chemical information on surface/bulk species (mostly H-containing) and reaction chemistry. Neutron diffraction and quasielastic neutron scattering can also supply important information on catalyst structures and dynamics of surface species. Other neutron approaches, such as small angle neutron scattering and neutron imaging, have been much less used but still give distinctive catalytic information. This review provides a comprehensive overview of recent advances in neutron scattering investigations of heterogeneous catalysis, focusing on surface adsorbates, reaction mechanisms, and catalyst structural changes revealed by neutron spectroscopy, diffraction, quasielastic neutron scattering, and other neutron techniques. Perspectives are also provided on the challenges and future opportunities in neutron scattering studies of heterogeneous catalysis.
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Affiliation(s)
- Xinbin Yu
- Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37381, United States
| | - Yongqiang Cheng
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Yuanyuan Li
- Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37381, United States
| | - Felipe Polo-Garzon
- Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37381, United States
| | - Jue Liu
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Eugene Mamontov
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Meijun Li
- Manufacturing Science Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - David Lennon
- School of Chemistry, Joseph Black Building, University of Glasgow, Glasgow G12 8QQ, United Kingdom
| | - Stewart F Parker
- ISIS Pulsed Neutron and Muon Facility, STFC Rutherford Appleton Laboratory, Chilton, Didcot, Oxon OX11 0QX, United Kingdom
| | - Anibal J Ramirez-Cuesta
- Neutron Technologies Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Zili Wu
- Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37381, United States
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
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2
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Yatoo MA, Seymour ID, Skinner SJ. Neutron diffraction and DFT studies of oxygen defect and transport in higher-order Ruddlesden-Popper phase materials. RSC Adv 2023; 13:13786-13797. [PMID: 37152577 PMCID: PMC10160924 DOI: 10.1039/d3ra01772a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2023] [Accepted: 04/24/2023] [Indexed: 05/09/2023] Open
Abstract
A series of higher-order Ruddlesden-Popper phase materials - La3PrNi3O10-δ , La2Pr2Ni3O10-δ and LaPr3Ni3O10-δ - were synthesised and investigated by neutron powder diffraction to understand the oxygen defect structure and propose possible pathways for oxygen transport in these materials. Further complimentary DFT calculations of the materials were performed to support the experimental analysis. All of the phases were hypostoichiometric and it was observed that the majority of the oxygen vacancies were confined to the perovskite layers, with a preference for equatorial oxygen sites. A particular preference for vacancies in O(1) and O(5) sites at high temperatures was observed from neutron diffraction measurements which were further complimented by DFT calculations wherein the vacancy formation energy was found to be lowest at the O(1) site. Also, a preference for a curved oxygen transport pathway around the NiO6 octahedra was observed which agrees with the published literature for Ruddlesden-Popper phase materials. Lattice parameters for all three compositions showed a linear increase with increasing temperature, but the increase was greatest in the c parameter while the b parameter showed only a slight increase when compared to the a parameter. The thermal expansion coefficient was calculated for all compositions and was found to be in the range 13.0-13.4 × 10-6 °C-1, which is compatible with the commonly used electrolyte materials for solid oxide fuel cells.
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Affiliation(s)
- Mudasir A Yatoo
- Imperial College London, Department of Materials, Faculty of Engineering Exhibition Road London SW7 2AZ UK
- EPSRC Centre for Doctoral Training in Advanced Characterisation of Materials Exhibition Road London SW7 2AZ UK
| | - Ieuan D Seymour
- Imperial College London, Department of Materials, Faculty of Engineering Exhibition Road London SW7 2AZ UK
| | - Stephen J Skinner
- Imperial College London, Department of Materials, Faculty of Engineering Exhibition Road London SW7 2AZ UK
- EPSRC Centre for Doctoral Training in Advanced Characterisation of Materials Exhibition Road London SW7 2AZ UK
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3
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Messegee ZT, Cho JS, Craig AJ, Garlea VO, Xin Y, Kang CJ, Proffen TE, Bhandari H, Kelly JC, Ghimire NJ, Aitken JA, Jang JI, Tan X. Multifunctional Cu 2TSiS 4 (T = Mn and Fe): Polar Semiconducting Antiferromagnets with Nonlinear Optical Properties. Inorg Chem 2023; 62:530-542. [PMID: 36538625 DOI: 10.1021/acs.inorgchem.2c03754] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Cu2TSiS4 (T = Mn and Fe) polycrystalline and single-crystal materials were prepared with high-temperature solid-state and chemical vapor transport methods, respectively. The polar crystal structure (space group Pmn21) consists of chains of corner-sharing and distorted CuS4, Mn/FeS4, and SiS4 tetrahedra, which is confirmed by Rietveld refinement using neutron powder diffraction data, X-ray single-crystal refinement, electron diffraction, energy-dispersive X-ray spectroscopy, and second harmonic generation (SHG) techniques. Magnetic measurements indicate that both compounds order antiferromagnetically at 8 and 14 K, respectively, which is supported by the temperature-dependent (100-2 K) neutron powder diffraction data. Additional magnetic reflections observed at 2 K can be modeled by magnetic propagation vectors k = (1/2,0,1/2) and k = (1/2,1/2,1/2) for Cu2MnSiS4 and Cu2FeSiS4, respectively. The refined antiferromagnetic structure reveals that the Mn/Fe spins are canted away from the ac plane by about 14°, with the total magnetic moments of Mn and Fe being 4.1(1) and 2.9(1) μB, respectively. Both compounds exhibit an SHG response with relatively modest second-order nonlinear susceptibilities. Density functional theory calculations are used to describe the electronic band structures.
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Affiliation(s)
- Zachary T Messegee
- Department of Chemistry and Biochemistry, George Mason University, Fairfax, Virginia22030, United States
| | - Jun Sang Cho
- Department of Physics, Sogang University, Seoul04017, Republic of Korea
| | - Andrew J Craig
- Department of Chemistry and Biochemistry, Duquesne University, Pittsburgh, Pennsylvania15282, United States
| | - V Ovidiu Garlea
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee37831, United States
| | - Yan Xin
- National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida32310, United States
| | - Chang-Jong Kang
- Department of Physics, Chungnam National University, Daejeon34134, Republic of Korea.,Institute of Quantum Systems, Chungnam National University, Daejeon34134, Republic of Korea
| | - Thomas E Proffen
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee37831, United States
| | - Hari Bhandari
- Department of Physics and Astronomy, George Mason University, Fairfax, Virginia22030, United States.,Quantum Science and Engineering Center, George Mason University, Fairfax, Virginia22030, United States
| | - Jordan C Kelly
- Department of Chemistry and Biochemistry, Duquesne University, Pittsburgh, Pennsylvania15282, United States
| | - Nirmal J Ghimire
- Department of Physics and Astronomy, George Mason University, Fairfax, Virginia22030, United States.,Quantum Science and Engineering Center, George Mason University, Fairfax, Virginia22030, United States
| | - Jennifer A Aitken
- Department of Chemistry and Biochemistry, Duquesne University, Pittsburgh, Pennsylvania15282, United States
| | - Joon I Jang
- Department of Physics, Sogang University, Seoul04017, Republic of Korea
| | - Xiaoyan Tan
- Department of Chemistry and Biochemistry, George Mason University, Fairfax, Virginia22030, United States
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4
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Messegee ZT, Gall P, Bhandari H, Siegfried PE, Kang CJ, Chen B, Conti CR, Chen B, Croft M, Zhang Q, Qadri SN, Prestigiacomo J, Ghimire NJ, Gougeon P, Tan X. LiMo 8O 10: Polar Crystal Structure with Infinite Edge-Sharing Molybdenum Octahedra. Inorg Chem 2022; 61:13924-13932. [PMID: 35993886 DOI: 10.1021/acs.inorgchem.2c01917] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Polycrystalline LiMo8O10 was prepared in a sealed Mo crucible at 1380 °C for 48 h using the conventional high-temperature solid-state method. The polar tetragonal crystal structure (space group I41md) is confirmed based on the Rietveld refinement of powder neutron diffraction and 7Li/6Li solid-state NMR. The crystal structure features infinite chains of Mo4O5 (i.e., Mo2Mo4/2O6/2O6/3) as a repeat unit containing edge-sharing Mo6 octahedra with strong Mo-Mo metal bonding along the chain. X-ray absorption near-edge spectroscopy of the Mo-L3 edge is consistent with the formal Mo valence/configuration. Magnetic measurements reveal that LiMo8O10 is paramagnetic down to 1.8 K. Temperature-dependent resistivity [ρ(T)] measurement indicates a semiconducting behavior that can be fitted with Mott's variable range hopping conduction mechanism in the temperature range of 215 and 45 K. The ρ(T) curve exhibits an exponential increase below 5 K with a large ratio of ρ1.8/ρ300 = 435. LiMo8O10 shows a negative field-dependent magnetoresistance between 2 and 25 K. Heat capacity measurement fitted with the modified Debye model yields the Debye temperature of 365 K.
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Affiliation(s)
- Zachary T Messegee
- Department of Chemistry and Biochemistry, George Mason University, Fairfax, Virginia 22030, United States
| | - Philippe Gall
- Sciences Chimiques de Rennes, UMR 6226 CNRS─INSA─Université de Rennes 1, Avenue du Général Leclerc, Rennes 35042, France
| | - Hari Bhandari
- Department of Physics and Astronomy, George Mason University, Fairfax, Virginia 22030, United States.,Quantum Science and Engineering Center, George Mason University, Fairfax, Virginia 22030, United States
| | - Peter E Siegfried
- Department of Physics and Astronomy, George Mason University, Fairfax, Virginia 22030, United States.,Quantum Science and Engineering Center, George Mason University, Fairfax, Virginia 22030, United States
| | - Chang-Jong Kang
- Department of Physics, Chungnam National University, Daejeon 34134, Republic of Korea.,Institute of Quantum Systems, Chungnam National University, Daejeon 34134, Republic of Korea
| | - Benjamin Chen
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | - Carl R Conti
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | - Banghao Chen
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | - Mark Croft
- Department of Physics and Astronomy, Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854, United States
| | - Qiang Zhang
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Syed N Qadri
- U.S. Naval Research Laboratory, Washington, District of Columbia 20375, United States
| | - Joseph Prestigiacomo
- U.S. Naval Research Laboratory, Washington, District of Columbia 20375, United States
| | - Nirmal J Ghimire
- Department of Physics and Astronomy, George Mason University, Fairfax, Virginia 22030, United States.,Quantum Science and Engineering Center, George Mason University, Fairfax, Virginia 22030, United States
| | - Patrick Gougeon
- Sciences Chimiques de Rennes, UMR 6226 CNRS─INSA─Université de Rennes 1, Avenue du Général Leclerc, Rennes 35042, France
| | - Xiaoyan Tan
- Department of Chemistry and Biochemistry, George Mason University, Fairfax, Virginia 22030, United States
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5
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Sacci RL, McAuliffe RD, Malkowski TF, Kidder N, Chen XC, Huq A, Kirkham M, Armstrong BL, Daemen LL, Veith GM. La 2Zr 2O 7 Nanoparticle-Mediated Synthesis of Porous Al-Doped Li 7La 3Zr 2O 12 Garnet. Inorg Chem 2021; 60:10012-10021. [PMID: 34143616 DOI: 10.1021/acs.inorgchem.1c01300] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In this work, we modified the reaction pathway to quickly (minutes) incorporate lithium and stabilize the ionic conducting garnet phase by decoupling the formation of a La-Zr-O network from the addition of lithium. To do this, we synthesized La2Zr2O7 (LZO) nanoparticles to which LiNO3 was added. This method is a departure from typical solid-state synthesis methods that require high-energy milling to promote mixing and intimate particle-particle contact and from sol-gel syntheses as a unique porous microstructure is obtained. We show that the reaction time is limited by the rate of nitrate decomposition and that this method produces a porous high-Li-ion-conducting cubic phase, within an hour, that may be used as a starting structure for a composite electrolyte.
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Affiliation(s)
- Robert L Sacci
- Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Rebecca D McAuliffe
- Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Thomas F Malkowski
- Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Nathan Kidder
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - X Chelsea Chen
- Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Ashfia Huq
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Melanie Kirkham
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Beth L Armstrong
- Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Luke L Daemen
- Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Gabriel M Veith
- Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
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6
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Todd PK, Wustrow A, McAuliffe RD, McDermott MJ, Tran GT, McBride BC, Boeding ED, O'Nolan D, Liu CH, Dwaraknath SS, Chapman KW, Billinge SJL, Persson KA, Huq A, Veith GM, Neilson JR. Defect-Accommodating Intermediates Yield Selective Low-Temperature Synthesis of YMnO 3 Polymorphs. Inorg Chem 2020; 59:13639-13650. [PMID: 32866379 DOI: 10.1021/acs.inorgchem.0c02023] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In the synthesis of complex oxides, solid-state metathesis provides low-temperature reactions where product selectivity can be achieved through simple changes in precursor composition. The influence of precursor structure, however, is less understood in solid-state synthesis. Here we present the ternary metathesis reaction (LiMnO2 + YOCl → YMnO3 + LiCl) to target two yttrium manganese oxide products, hexagonal and orthorhombic YMnO3, when starting from three different LiMnO2 precursors. Using temperature-dependent synchrotron X-ray and neutron diffraction, we identify the relevant intermediates and temperature regimes of reactions along the pathway to YMnO3. Manganese-containing intermediates undergo a charge disproportionation into a reduced Mn(II,III) tetragonal spinel and oxidized Mn(III,IV) cubic spinel, which lead to hexagonal and orthorhombic YMnO3, respectively. Density functional theory calculations confirm that the presence of Mn(IV) caused by a small concentration of cation vacancies (∼2.2%) in YMnO3 stabilizes the orthorhombic polymorph over the hexagonal. Reactions over the course of 2 weeks yield o-YMnO3 as the majority product at temperatures below 600 °C, which supports an equilibration of cation defects over time. Controlling the composition and structure of these defect-accommodating intermediates provides new strategies for selective synthesis of complex oxides at low temperatures.
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Affiliation(s)
- Paul K Todd
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523-1872, United States
| | - Allison Wustrow
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523-1872, United States
| | - Rebecca D McAuliffe
- Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Matthew J McDermott
- Energy Technologies Area, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, California 94720, United States.,Department of Materials Science and Engineering, University of California, Berkeley, California 94720, United States
| | - Gia Thinh Tran
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523-1872, United States
| | - Brennan C McBride
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523-1872, United States
| | - Ethan D Boeding
- Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Daniel O'Nolan
- Department of Chemistry, Stony Brook University, Stony Brook, New York 11790-3400, United States
| | - Chia-Hao Liu
- Department of Applied Physics, Columbia University, New York, New York 10027, United States.,Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Shyam S Dwaraknath
- Energy Technologies Area, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, California 94720, United States
| | - Karena W Chapman
- Department of Chemistry, Stony Brook University, Stony Brook, New York 11790-3400, United States
| | - Simon J L Billinge
- Department of Applied Physics, Columbia University, New York, New York 10027, United States.,Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Kristin A Persson
- Energy Technologies Area, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, California 94720, United States.,Department of Materials Science and Engineering, University of California, Berkeley, California 94720, United States
| | - Ashfia Huq
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Gabriel M Veith
- Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - James R Neilson
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523-1872, United States
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7
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Huq A, Kirkham M, Peterson PF, Hodges JP, Whitfield PS, Page K, Hűgle T, Iverson EB, Parizzi A, Rennich G. POWGEN: rebuild of a third-generation powder diffractometer at the Spallation Neutron Source. J Appl Crystallogr 2019; 52:1189-1201. [PMID: 31636522 PMCID: PMC6782079 DOI: 10.1107/s160057671901121x] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2019] [Accepted: 08/11/2019] [Indexed: 11/25/2022] Open
Abstract
This work describes the design principles and upgrade of the neutron powder diffractometer POWGEN at the Spallation Neutron Source. The neutron powder diffractometer POWGEN at the Spallation Neutron Source has recently (2017–2018) undergone an upgrade which resulted in an increased detector complement along with a full overhaul of the structural design of the instrument. The current instrument has a solid angular coverage of 1.2 steradians and maintains the original third-generation concept, providing a single-histogram data set over a wide d-spacing range and high resolution to access large unit cells, detailed structural refinements and in situ/operando measurements.
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Affiliation(s)
- Ashfia Huq
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831-6475, USA
| | - Melanie Kirkham
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831-6475, USA
| | - Peter F Peterson
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831-6475, USA
| | - Jason P Hodges
- Neutron Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831-6475, USA
| | - Pamela S Whitfield
- Excelsus Structural Solutions, Park Innovaare, 5234 Villigen, Switzerland
| | - Katharine Page
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831-6475, USA
| | - Thomas Hűgle
- Neutron Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831-6475, USA
| | - Erik B Iverson
- Neutron Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831-6475, USA
| | - Andre Parizzi
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831-6475, USA
| | - George Rennich
- Neutron Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831-6475, USA
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