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Xu M, Kumar A, LeBeau JM. Correlating local chemical and structural order using Geographic Information Systems-based spatial statistics. Ultramicroscopy 2022; 243:113642. [DOI: 10.1016/j.ultramic.2022.113642] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2022] [Revised: 10/12/2022] [Accepted: 11/06/2022] [Indexed: 11/13/2022]
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2
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Wang R, Gebretsadik A, Ubaid-Kassis S, Schroeder A, Vojta T, Baker PJ, Pratt FL, Blundell SJ, Lancaster T, Franke I, Möller JS, Page K. Quantum Griffiths Phase Inside the Ferromagnetic Phase of Ni_{1-x}V_{x}. PHYSICAL REVIEW LETTERS 2017; 118:267202. [PMID: 28707923 DOI: 10.1103/physrevlett.118.267202] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2016] [Indexed: 06/07/2023]
Abstract
We study by means of bulk and local probes the d-metal alloy Ni_{1-x}V_{x} close to the quantum critical concentration, x_{c}≈11.6%, where the ferromagnetic transition temperature vanishes. The magnetization-field curve in the ferromagnetic phase takes an anomalous power-law form with a nonuniversal exponent that is strongly x dependent and mirrors the behavior in the paramagnetic phase. Muon spin rotation experiments demonstrate inhomogeneous magnetic order and indicate the presence of dynamic fluctuating magnetic clusters. These results provide strong evidence for a quantum Griffiths phase on the ferromagnetic side of the quantum phase transition.
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Affiliation(s)
- Ruizhe Wang
- Physics Department, Kent State University, Kent, Ohio 44242, USA
| | | | | | - Almut Schroeder
- Physics Department, Kent State University, Kent, Ohio 44242, USA
| | - Thomas Vojta
- Department of Physics, Missouri University of Science and Technology, Rolla, Missouri 65409, USA
| | - Peter J Baker
- ISIS Facility, STFC Rutherford Appleton Laboratory, Harwell Oxford, Oxfordshire OX11 0QX, United Kingdom
| | - Francis L Pratt
- ISIS Facility, STFC Rutherford Appleton Laboratory, Harwell Oxford, Oxfordshire OX11 0QX, United Kingdom
| | - Stephen J Blundell
- Clarendon Laboratory, Department of Physics, Oxford University, Parks Road, Oxford OX1 3PU, United Kingdom
| | - Tom Lancaster
- Clarendon Laboratory, Department of Physics, Oxford University, Parks Road, Oxford OX1 3PU, United Kingdom
| | - Isabel Franke
- Clarendon Laboratory, Department of Physics, Oxford University, Parks Road, Oxford OX1 3PU, United Kingdom
| | - Johannes S Möller
- Clarendon Laboratory, Department of Physics, Oxford University, Parks Road, Oxford OX1 3PU, United Kingdom
| | - Katharine Page
- Spallation Neutron Source, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
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3
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Parra JB, Ania CO, Arenillas A, Rubiera F, Pis JJ, Palacios JM. Structural Changes in Polyethylene Terephthalate (PET) Waste Materials Caused by Pyrolysis and CO2Activation. ADSORPT SCI TECHNOL 2016. [DOI: 10.1260/026361706779849735] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Affiliation(s)
- José B. Parra
- Instituto Nacional del Carbón, CSIC, Apartado 73, 33080 Oviedo, Spain
| | - Conchi O. Ania
- Instituto Nacional del Carbón, CSIC, Apartado 73, 33080 Oviedo, Spain
| | - Ana Arenillas
- Instituto Nacional del Carbón, CSIC, Apartado 73, 33080 Oviedo, Spain
| | - Fernando Rubiera
- Instituto Nacional del Carbón, CSIC, Apartado 73, 33080 Oviedo, Spain
| | - José J. Pis
- Instituto Nacional del Carbón, CSIC, Apartado 73, 33080 Oviedo, Spain
| | - José M. Palacios
- Instituto de Catálisis y Petroleoquímica, CSIC, Campus UAM-Cantoblanco, 28049 Madrid, Spain
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Ahmmed KF, Balogh L, Idrees Y, Yu H, Long F, Daymond MR. Quantitative characterization of the microstructure of heat-treated Zr-Excel by neutron line profile analysis. J Appl Crystallogr 2016. [DOI: 10.1107/s1600576716011924] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
Neutron diffraction line profile analysis (DLPA) and transmission electron microscopy were used to characterize the components of the bimodal microstructure of Zr-Excel (Zr–3.5Sn–0.8Mo–0.8Nb), a nuclear structural material. The dual microstructure, consisting of equiaxed primary grains and martensitic domains both having hexagonal close-packed (h.c.p.) α crystal structure, forms when the as-received Zr-Excel alloy is heat treated at a high temperature and subsequently quenched, i.e. is solution treated. Because both microstructure components have the same crystal structure the reflections from the two components overlap significantly. The article presents how the multi-phase analysis capability of modern DLPA methods can be used to model the measured neutron diffraction patterns as the sum of two sub-patterns corresponding to the components of such a bimodal microstructure, which can be found in many hexagonal alloys relevant for industrial applications. The results show that the large equiaxed primary h.c.p. α grains have a highly correlated low-density dislocation structure and large sub-grains (∼300 nm), while the large martensitic domains have a randomly arranged very high density dislocation structure and sub-grains the size of ∼30 nm. The significantly different defect structures of the primary and martensitic phases manifest as large differences in the hardness and ductility of the individual components. As a result of this duality of the mechanical properties, solution-treated Zr-Excel materials can be considered as analogous to metal matrix composites where a softer ductile matrix contains a harder brittle reinforcing phase.
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Feygenson M, Neuefeind JC, Tyson TA, Schieber N, Han WQ. Average and Local Crystal Structures of (Ga(1-x)Znx)(N(1-x)Ox) Solid Solution Nanoparticles. Inorg Chem 2015; 54:11226-35. [PMID: 26544911 DOI: 10.1021/acs.inorgchem.5b01605] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We report a comprehensive study of the crystal structure of (Ga(1-x)Znx)(N(1-x)Ox) solid solution nanoparticles by means of neutron and synchrotron X-ray scattering. In our study, we used four different types of (Ga(1-x)Znx)(N(1-x)Ox) nanoparticles, with diameters of 10-27 nm and x = 0.075-0.51, which show energy band gaps from 2.21 to 2.61 eV. Rietveld analysis of the neutron diffraction data revealed that the average crystal structure is hexagonal wurtzite (space group P63mc) for the larger nanoparticles, while the crystal structure of smaller nanoparticles is disordered hexagonal. Pair-distribution-function analysis found that the intermediate crystal structure retains a "motif" of the average one; however, the local structure is more disordered. The implications of disorder on the reduced energy band gap are discussed.
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Affiliation(s)
- Mikhail Feygenson
- Chemical and Engineering Materials Division, Spallation Neutron Source (SNS), Oak Ridge National Laboratory , Oak Ridge, Tennessee 37831, United States
| | - Joerg C Neuefeind
- Chemical and Engineering Materials Division, Spallation Neutron Source (SNS), Oak Ridge National Laboratory , Oak Ridge, Tennessee 37831, United States
| | - Trevor A Tyson
- Department of Physics, New Jersey Institute of Technology , Newark, New Jersey 07102, United States
| | - Natalie Schieber
- Vanderbilt University , Nashville, Tennessee 37235, United States
| | - Wei-Qiang Han
- Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences , Ningbo 315201, China
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6
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Petkov V, Ren Y, Shan S, Luo J, Zhong CJ. A distinct atomic structure-catalytic activity relationship in 3-10 nm supported Au particles. NANOSCALE 2014; 6:532-538. [PMID: 24232747 DOI: 10.1039/c3nr05362h] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Bulk Au is very inert but Au nanoparticles less than 5 nm in size have been found to be catalytically active for several reactions, in particular for low-temperature oxidation of CO. Using high-energy X-ray diffraction coupled with atomic pair distribution function analysis and computer simulations we determine the structure of 3 nm and 10 nm Au particles supported on titania and silica as typical representatives of reducible and irreducible supports, respectively. We find that the synthesis protocol adopted in our work affects strongly and differently the structure of the Au nanoparticles on the different supports. This leads to clearly distinct dependences of the catalytic activity of the nanoparticles on their size. In the case of the silica support the catalytic activity of Au nanoparticles increases and in the case of the titania support it decreases with decreasing nanoparticle size. The experimental results are considered in terms of current theoretical predictions and found to be in good accord with them.
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Affiliation(s)
- Valeri Petkov
- Department of Physics, Central Michigan University, Mt. Pleasant, Michigan 48859, USA.
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Petkov V, Shan S, Chupas P, Yin J, Yang L, Luo J, Zhong CJ. Noble-transition metal nanoparticle breathing in a reactive gas atmosphere. NANOSCALE 2013; 5:7379-7387. [PMID: 23828235 DOI: 10.1039/c3nr02582a] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
In situ high-energy X-ray diffraction coupled to atomic pair distribution function analysis is used to obtain fundamental insight into the effect of the reactive gas environment on the atomic-scale structure of metallic particles less than 10 nm in size. To substantiate our recent discovery we investigate a wide range of noble-transition metal nanoparticles and confirm that they expand and contract radially when treated in oxidizing (O2) and reducing (H2) atmospheres, respectively. The results are confirmed by supplementary XAFS experiments. Using computer simulations guided by the experimental diffraction data we quantify the effect in terms of both relative lattice strain and absolute atomic displacements. In particular, we show that the effect leads to a small percent of extra surface strain corresponding to several tenths of Ångström displacements of the atoms at the outmost layer of the particles. The effect then gradually decays to zero within 4 atomic layers inside the particles. We also show that, reminiscent of a breathing type structural transformation, the effect is reproducible and reversible. We argue that because of its significance and widespread occurrence the effect should be taken into account in nanoparticle research.
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Affiliation(s)
- Valeri Petkov
- Department of Physics, Central Michigan University, Mt. Pleasant, Michigan 48859, USA.
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Tuaev X, Rudi S, Petkov V, Hoell A, Strasser P. In situ study of atomic structure transformations of Pt-Ni nanoparticle catalysts during electrochemical potential cycling. ACS NANO 2013; 7:5666-5674. [PMID: 23805992 DOI: 10.1021/nn402406k] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
When exposed to corrosive anodic electrochemical environments, Pt alloy nanoparticles (NPs) undergo selective dissolution of the less noble component, resulting in catalytically active bimetallic Pt-rich core-shell structures. Structural evolution of PtNi6 and PtNi3 NP catalysts during their electrochemical activation and catalysis was studied by in situ anomalous small-angle X-ray scattering to obtain insight in element-specific particle size evolution and time-resolved insight in the intraparticle structure evolution. Ex situ high-energy X-ray diffraction coupled with pair distribution function analysis was employed to obtain detailed information on the atomic-scale ordering, particle phases, structural coherence lengths, and particle segregation. Our studies reveal a spontaneous electrochemically induced formation of PtNi particles of ordered Au3Cu-type alloy structures from disordered alloy phases (solid solutions) concomitant with surface Ni dissolution, which is coupled to spontaneous residual Ni metal segregation during the activation of PtNi6. Pt-enriched core-shell structures were not formed using the studied Ni-rich nanoparticle precursors. In contrast, disordered PtNi3 alloy nanoparticles lose Ni more rapidly, forming Pt-enriched core-shell structures with superior catalytic activity. Our X-ray scattering results are confirmed by STEM/EELS results on similar nanoparticles.
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Affiliation(s)
- Xenia Tuaev
- Technical University Berlin, Strasse des 17. Juni 124, 10623 Berlin, Germany.
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9
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Yang L, Shan S, Loukrakpam R, Petkov V, Ren Y, Wanjala BN, Engelhard MH, Luo J, Yin J, Chen Y, Zhong CJ. Role of Support–Nanoalloy Interactions in the Atomic-Scale Structural and Chemical Ordering for Tuning Catalytic Sites. J Am Chem Soc 2012; 134:15048-60. [DOI: 10.1021/ja3060035] [Citation(s) in RCA: 82] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Lefu Yang
- Department of Chemistry, State University of New York at Binghamton, Binghamton,
New York 13902, United States
| | - Shiyao Shan
- Department of Chemistry, State University of New York at Binghamton, Binghamton,
New York 13902, United States
| | - Rameshwori Loukrakpam
- Department of Chemistry, State University of New York at Binghamton, Binghamton,
New York 13902, United States
| | - Valeri Petkov
- Department of Physics, Central Michigan University, Mt. Pleasant, Michigan
48859, United States
| | - Yang Ren
- Advanced Photon
Source, Argonne National Laboratory, Argonne,
Illinois 60439,
United States
| | - Bridgid N. Wanjala
- Department of Chemistry, State University of New York at Binghamton, Binghamton,
New York 13902, United States
| | - Mark H. Engelhard
- EMSL, Pacific Northwest National Laboratory, Richland, Washington 99352, United
States
| | - Jin Luo
- Department of Chemistry, State University of New York at Binghamton, Binghamton,
New York 13902, United States
| | - Jun Yin
- Department of Chemistry, State University of New York at Binghamton, Binghamton,
New York 13902, United States
| | - Yongsheng Chen
- EMS Energy
Institute and Department
of Energy and Mineral Engineering, Pennsylvania State University, University Park, Pennsylvania 16802, United
States
| | - Chuan-Jian Zhong
- Department of Chemistry, State University of New York at Binghamton, Binghamton,
New York 13902, United States
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10
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Petkov V, Wanjala BN, Loukrakpam R, Luo J, Yang L, Zhong CJ, Shastri S. Pt-Au alloying at the nanoscale. NANO LETTERS 2012; 12:4289-4299. [PMID: 22784003 DOI: 10.1021/nl302329n] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The formation of nanosized alloys between a pair of elements, which are largely immiscible in bulk, is examined in the archetypical case of Pt and Au. Element specific resonant high-energy X-ray diffraction experiments coupled to atomic pair distribution functions analysis and computer simulations prove the formation of Pt-Au alloys in particles less than 10 nm in size. In the alloys, Au-Au and Pt-Pt bond lengths differing in 0.1 Å are present leading to extra structural distortions as compared to pure Pt and Au particles. The alloys are found to be stable over a wide range of Pt-Au compositions and temperatures contrary to what current theory predicts. The alloy-type structure of Pt-Au nanoparticles comes along with a high catalytic activity for electrooxidation of methanol making an excellent example of the synergistic effect of alloying at the nanoscale on functional properties.
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Affiliation(s)
- Valeri Petkov
- Department of Physics, Central Michigan University, Mt. Pleasant, Michigan 48859, USA.
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11
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Tyrsted C, Pauw BR, Jensen KMØ, Becker J, Christensen M, Iversen BB. Watching Nanoparticles Form: An In Situ (Small-/Wide-Angle X-ray Scattering/Total Scattering) Study of the Growth of Yttria-Stabilised Zirconia in Supercritical Fluids. Chemistry 2012; 18:5759-66. [DOI: 10.1002/chem.201102826] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2011] [Revised: 12/15/2011] [Indexed: 11/11/2022]
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13
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Atassi F, Mao C, Masadeh AS, Byrn SR. Solid-State Characterization of Amorphous and Mesomorphous Calcium Ketoprofen. J Pharm Sci 2010; 99:3684-97. [DOI: 10.1002/jps.21925] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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14
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Jolley CC, Uchida M, Reichhardt C, Harrington R, Kang S, Klem MT, Parise JB, Douglas T. Size and crystallinity in protein-templated inorganic nanoparticles. CHEMISTRY OF MATERIALS : A PUBLICATION OF THE AMERICAN CHEMICAL SOCIETY 2010; 22:4612-4618. [PMID: 23997427 PMCID: PMC3756833 DOI: 10.1021/cm100657w] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Protein cages such as ferritins and virus capsids have been used as containers to synthesize a wide variety of protein-templated inorganic nanoparticles. While identification of the inorganic crystal phase has been successful in some cases, very little is known about the detailed nanoscale structure of the inorganic component. We have used pair distribution function analysis of total X-ray scattering to measure the crystalline domain size in nanoparticles of ferrihydrite, γ-Fe2O3, Mn3O4, CoPt, and FePt grown inside 24-meric ferritin cages from H. sapiens and P. furiosus. The material properties of these protein-templated nanoparticles are influenced by processes at a variety of length scales: the chemistry of the material determines the precise arrangement of atoms at very short distances, while the interior volume of the protein cage constrains the maximum nanoparticle size attainable. At intermediate length scales, the size of coherent crystalline domains appears to be constrained by the arrangement of crystal nucleation sites on the interior of the cage. Based on these observations, some potential synthetic strategies for the control of crystalline domain size in protein-templated nanoparticles are suggested.
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Affiliation(s)
- Craig C. Jolley
- Department of Chemistry & Biochemistry, Montana State University
- Astrobiology Biogeocatalysis Research Center, Montana State University
| | - Masaki Uchida
- Department of Chemistry & Biochemistry, Montana State University
- Center for Bio-Inspired Nanomaterials, Montana State University
| | | | - Richard Harrington
- Department of Chemistry and Department of Geosciences, Stony Brook University
| | - Sebyung Kang
- Department of Chemistry & Biochemistry, Montana State University
| | - Michael T. Klem
- Department of Chemistry & Biochemistry, Montana State University
| | - John B. Parise
- Department of Chemistry and Department of Geosciences, Stony Brook University
| | - Trevor Douglas
- Department of Chemistry & Biochemistry, Montana State University
- Astrobiology Biogeocatalysis Research Center, Montana State University
- Center for Bio-Inspired Nanomaterials, Montana State University
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15
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Proffen T, Page KL. Obtaining structural information from the atomic pair distribution function. ACTA ACUST UNITED AC 2009. [DOI: 10.1524/zkri.219.3.130.29100] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Abstract
The knowledge of the detailed atomic structure of modern materials is the key to understanding the their macroscopic properties. The atomic pair distribution function (PDF) reveals short-range and medium-range structural information. In this paper we present an overview of refinement and modelling techniques. In short, we will be trying to answer the question: What can I learn from my PDF?
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Proffen T, Page KL, McLain SE, Clausen B, Darling TW, TenCate JA, Lee SY, Ustundag E. Atomic pair distribution function analysis of materials containing crystalline and amorphous phases. ACTA ACUST UNITED AC 2009. [DOI: 10.1524/zkri.2005.220.12.1002] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Abstract
The atomic pair distribution function (PDF) approach has been used to study the local structure of liquids, glasses and disordered crystalline materials. In this paper, we demonstrate the use of the PDF method to investigate systems containing a crystalline and an amorphous structural phase. We present two examples: Bulk metallic glass with crystalline reinforcements and Fontainebleau sandstone, where an unexpected glassy phase was discovered. In this paper we also discuss the refinement methods used in detail.
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Affiliation(s)
| | - Katharine L. Page
- Los Alamos National Laboratory, Lujan Neutron Scattering Center, Los Alamos, U.S.A
| | - Sylvia E. McLain
- Los Alamos National Laboratory, Lujan Neutron Scattering Center, Los Alamos, U.S.A
| | - Bjorn Clausen
- Los Alamos National Laboratory, Lujan Neutron Scattering Center, Los Alamos, U.S.A
| | - Timothy W. Darling
- Los Alamos National Laboratory, Material Science and Technology, Los Alamos, U.S.A
| | - James A. TenCate
- Los Alamos National Center, Earth and Environmenntal Science, Los Alamos, U.S.A
| | - Seung-Yub Lee
- California Institute of Technology, Department of Materials Science and Engineering, Pasadena, U.S.A
| | - Ersan Ustundag
- Iowa State University, Department of Materials Science and Engineering, Ames, U.S.A
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17
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Abeykoon AMM, Donner W, Brunelli M, Castro-Colin M, Jacobson AJ, Moss SC. From Average to Local Structure: A Rietveld and an Atomic Pair Distribution Function (PDF) Study of Selenium Clusters in Zeolite-NdY. J Am Chem Soc 2009; 131:13230-1. [DOI: 10.1021/ja905164e] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- A. M. Milinda Abeykoon
- Department of Physics, University of Houston, Houston, Texas 77204, Department of Chemistry, University of Houston, Houston, Texas 77204, Texas Center for Superconductivity at the University of Houston (TcSUH), Houston, Texas 77204, European Synchrotron Radiation Facility (ESRF), Grenoble, France, Department of Physics, University of Texas, El Paso, Texas 79968, and Institute of Materials Science, Darmstadt University of Technology, 64291 Darmstadt, Germany
| | - Wolfgang Donner
- Department of Physics, University of Houston, Houston, Texas 77204, Department of Chemistry, University of Houston, Houston, Texas 77204, Texas Center for Superconductivity at the University of Houston (TcSUH), Houston, Texas 77204, European Synchrotron Radiation Facility (ESRF), Grenoble, France, Department of Physics, University of Texas, El Paso, Texas 79968, and Institute of Materials Science, Darmstadt University of Technology, 64291 Darmstadt, Germany
| | - Michela Brunelli
- Department of Physics, University of Houston, Houston, Texas 77204, Department of Chemistry, University of Houston, Houston, Texas 77204, Texas Center for Superconductivity at the University of Houston (TcSUH), Houston, Texas 77204, European Synchrotron Radiation Facility (ESRF), Grenoble, France, Department of Physics, University of Texas, El Paso, Texas 79968, and Institute of Materials Science, Darmstadt University of Technology, 64291 Darmstadt, Germany
| | - Miguel Castro-Colin
- Department of Physics, University of Houston, Houston, Texas 77204, Department of Chemistry, University of Houston, Houston, Texas 77204, Texas Center for Superconductivity at the University of Houston (TcSUH), Houston, Texas 77204, European Synchrotron Radiation Facility (ESRF), Grenoble, France, Department of Physics, University of Texas, El Paso, Texas 79968, and Institute of Materials Science, Darmstadt University of Technology, 64291 Darmstadt, Germany
| | - Allan J. Jacobson
- Department of Physics, University of Houston, Houston, Texas 77204, Department of Chemistry, University of Houston, Houston, Texas 77204, Texas Center for Superconductivity at the University of Houston (TcSUH), Houston, Texas 77204, European Synchrotron Radiation Facility (ESRF), Grenoble, France, Department of Physics, University of Texas, El Paso, Texas 79968, and Institute of Materials Science, Darmstadt University of Technology, 64291 Darmstadt, Germany
| | - Simon C. Moss
- Department of Physics, University of Houston, Houston, Texas 77204, Department of Chemistry, University of Houston, Houston, Texas 77204, Texas Center for Superconductivity at the University of Houston (TcSUH), Houston, Texas 77204, European Synchrotron Radiation Facility (ESRF), Grenoble, France, Department of Physics, University of Texas, El Paso, Texas 79968, and Institute of Materials Science, Darmstadt University of Technology, 64291 Darmstadt, Germany
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18
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Hui Q, Dove MT, Tucker MG, Redfern SAT, Keen DA. Neutron total scattering and reverse Monte Carlo study of cation ordering in Ca(x)Sr(1-x)TiO(3). JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2007; 19:335214. [PMID: 21694137 DOI: 10.1088/0953-8984/19/33/335214] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
We use neutron total scattering measurements with reverse Monte Carlo analysis methods incorporating an atom-swapping algorithm to identify the short-range Ca/Sr cation ordering within the Ca(x)Sr(1-x)TiO(3) solid solution (compositions x = 0.2,0.5,0.8). Our results show that nearest-neighbour pairs have a strong tendency for unlike Ca/Sr first-neighbour coordination in the x = 0.2 and 0.5 cases. In the x = 0.5 case the Ca/Sr ordering results in a structure with space group P 2(1)nm. In contrast, there is much less short-range cation ordering in the x = 0.8 case.
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Affiliation(s)
- Qun Hui
- Department of Earth Sciences, University of Cambridge, Downing Street, Cambridge CB2 3EQ, UK
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19
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Proffen T, Page KL, McLain SE, Clausen B, Darling TW, TenCate JA, Lee SY, Ustundag E. Atomic pair distribution function analysis of materials containing crystalline and amorphous phases. ACTA ACUST UNITED AC 2005. [DOI: 10.1524/zkri.2005.220.12_2005.1002] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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20
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Garcia-Adeva AJ, Conradson DR, Villella P, Conradson SD. Signatures of Collective Local and Nanoscale Distortions in Diffraction Experiments. J Phys Chem B 2003. [DOI: 10.1021/jp034016y] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Angel J. Garcia-Adeva
- Materials Science and Technology Division (MST-8), Mailstop G755, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, and Department of Physics, University of Colorado, Boulder, Colorado 80309
| | - Dylan R. Conradson
- Materials Science and Technology Division (MST-8), Mailstop G755, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, and Department of Physics, University of Colorado, Boulder, Colorado 80309
| | - Phillip Villella
- Materials Science and Technology Division (MST-8), Mailstop G755, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, and Department of Physics, University of Colorado, Boulder, Colorado 80309
| | - Steven D. Conradson
- Materials Science and Technology Division (MST-8), Mailstop G755, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, and Department of Physics, University of Colorado, Boulder, Colorado 80309
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