1
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Alabarse FG, Baptiste B, Guarnelli Y, Onodera Y, Kohara S, Haines J. Direct Single Crystal to Amorphous Transformation and Memory Effect in AlPO 4-17. J Phys Chem Lett 2024; 15:4612-4615. [PMID: 38640441 DOI: 10.1021/acs.jpclett.4c00853] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/21/2024]
Abstract
Pressure induced amorphization provides a distinct route to prepare novel amorphous materials. Single crystals of the porous aluminophosphate AlPO4-17 directly transform to an amorphous state beginning at 0.6 GPa, without fragmentation into polycrystalline material. Apart from a reduction in dimensions, the amorphous material retains the form of the initial single crystal. Remnant crystalline domains in the amorphous material also preserve the initial orientation of the single crystal. X-ray diffraction indicates the compression of the structure around the empty pores in the xy plane and such an amorphization mechanism is consistent with a direct structural relationship between the single crystal and amorphous forms. The collapse of the initial pore volume is almost complete at 2.5 GPa. A memory effect is observed in the amorphous form, which strongly expands on decompression. The present process opens the way for the synthesis of topologically ordered amorphous materials approaching "perfect glasses" with improved mechanical properties.
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Affiliation(s)
| | - Benoît Baptiste
- Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie, (IMPMC) UMR 7590 CNRS - Sorbonne Université - IRD - MNHN, 4 place Jussieu, 75252 Paris Cedex 5, France
| | - Yoann Guarnelli
- Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie, (IMPMC) UMR 7590 CNRS - Sorbonne Université - IRD - MNHN, 4 place Jussieu, 75252 Paris Cedex 5, France
| | - Yohei Onodera
- Center for Basic Research on Materials, National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan
| | - Shinji Kohara
- Center for Basic Research on Materials, National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan
| | - Julien Haines
- Institut Charles Gerhardt Montpellier, Université de Montpellier, CNRS, ENSCM, 34293 Montpellier, France
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2
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Li C, Liu K, Jiang D, Yan H, Chen E, Ma Y, Cheng H, Wen T, Yue B, Wang Y. Pressure-Driven Polymorphic Transition, Emergent Insulator-To-Metal Transition, and Photoconductivity Switching in Violet Phosphorus. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2306758. [PMID: 37852946 DOI: 10.1002/smll.202306758] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Indexed: 10/20/2023]
Abstract
Polymorphic phase transition is an essential phenomenon in condensed matter that the physical properties of materials may undergo significant changes due to the structural transformation. Phase transition has thus become an important means and dimension for regulating material properties. Herein, this study demonstrates the pressure-induced multi-transition of both structure and physical properties in violet phosphorus, a novel phosphorus allotrope. Under compression, violet phosphorus undergoes sequential polymorphic phase transitions. Concomitant with the first phase transition, violet phosphorus exhibits emergent insulator-metal transition, superconductivity, and dramatic switching from positive to negative photoconductivity. Remarkably, the resistance of violet phosphorus shows a sudden drop of around 107 along with the phase transition. In addition, piezochromism from translucent red to opaque black and suppression of photoluminescence are observed upon compression. Of particular interest is that the sample irreversibly transforms into black phosphorus with a pronounced discrepancy in physical properties from the pristine violet phosphorus after decompression. The abundant polymorphic transitions and property changes in violet phosphorus have significant implications for designing novel pressure-responsive electronic/optoelectronic devices and exploring concealed polymorphic transition materials.
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Affiliation(s)
- Chen Li
- School of Materials Science and Engineering, Peking University, Beijing, 100871, China
- Center for High Pressure Science and Technology Advanced Research (HPSTAR), Beijing, 100193, China
| | - Ke Liu
- Center for High Pressure Science and Technology Advanced Research (HPSTAR), Beijing, 100193, China
| | - Dequan Jiang
- School of Materials Science and Engineering, Peking University, Beijing, 100871, China
| | - Huacai Yan
- School of Materials Science and Engineering, Peking University, Beijing, 100871, China
| | - En Chen
- Center for High Pressure Science and Technology Advanced Research (HPSTAR), Beijing, 100193, China
| | - Yingying Ma
- Center for High Pressure Science and Technology Advanced Research (HPSTAR), Beijing, 100193, China
| | - Haoming Cheng
- Center for High Pressure Science and Technology Advanced Research (HPSTAR), Beijing, 100193, China
| | - Ting Wen
- Center for High Pressure Science and Technology Advanced Research (HPSTAR), Beijing, 100193, China
| | - Binbin Yue
- Center for High Pressure Science and Technology Advanced Research (HPSTAR), Beijing, 100193, China
| | - Yonggang Wang
- School of Materials Science and Engineering, Peking University, Beijing, 100871, China
- Center for High Pressure Science and Technology Advanced Research (HPSTAR), Beijing, 100193, China
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3
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Yun Q, Ge Y, Shi Z, Liu J, Wang X, Zhang A, Huang B, Yao Y, Luo Q, Zhai L, Ge J, Peng Y, Gong C, Zhao M, Qin Y, Ma C, Wang G, Wa Q, Zhou X, Li Z, Li S, Zhai W, Yang H, Ren Y, Wang Y, Li L, Ruan X, Wu Y, Chen B, Lu Q, Lai Z, He Q, Huang X, Chen Y, Zhang H. Recent Progress on Phase Engineering of Nanomaterials. Chem Rev 2023. [PMID: 37962496 DOI: 10.1021/acs.chemrev.3c00459] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2023]
Abstract
As a key structural parameter, phase depicts the arrangement of atoms in materials. Normally, a nanomaterial exists in its thermodynamically stable crystal phase. With the development of nanotechnology, nanomaterials with unconventional crystal phases, which rarely exist in their bulk counterparts, or amorphous phase have been prepared using carefully controlled reaction conditions. Together these methods are beginning to enable phase engineering of nanomaterials (PEN), i.e., the synthesis of nanomaterials with unconventional phases and the transformation between different phases, to obtain desired properties and functions. This Review summarizes the research progress in the field of PEN. First, we present representative strategies for the direct synthesis of unconventional phases and modulation of phase transformation in diverse kinds of nanomaterials. We cover the synthesis of nanomaterials ranging from metal nanostructures such as Au, Ag, Cu, Pd, and Ru, and their alloys; metal oxides, borides, and carbides; to transition metal dichalcogenides (TMDs) and 2D layered materials. We review synthesis and growth methods ranging from wet-chemical reduction and seed-mediated epitaxial growth to chemical vapor deposition (CVD), high pressure phase transformation, and electron and ion-beam irradiation. After that, we summarize the significant influence of phase on the various properties of unconventional-phase nanomaterials. We also discuss the potential applications of the developed unconventional-phase nanomaterials in different areas including catalysis, electrochemical energy storage (batteries and supercapacitors), solar cells, optoelectronics, and sensing. Finally, we discuss existing challenges and future research directions in PEN.
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Affiliation(s)
- Qinbai Yun
- Department of Chemistry, City University of Hong Kong, Kowloon, Hong Kong, China
- Department of Chemical and Biological Engineering & Energy Institute, The Hong Kong University of Science and Technology, Hong Kong, China
| | - Yiyao Ge
- School of Materials Science and Engineering, Peking University, Beijing 100871, China
| | - Zhenyu Shi
- Department of Chemistry, City University of Hong Kong, Kowloon, Hong Kong, China
| | - Jiawei Liu
- Institute of Sustainability for Chemicals, Energy and Environment, Agency for Science, Technology and Research (A*STAR), Singapore, 627833, Singapore
| | - Xixi Wang
- Department of Chemistry, City University of Hong Kong, Kowloon, Hong Kong, China
| | - An Zhang
- Department of Chemistry, City University of Hong Kong, Kowloon, Hong Kong, China
| | - Biao Huang
- Department of Chemistry, City University of Hong Kong, Kowloon, Hong Kong, China
- Hong Kong Branch of National Precious Metals Material Engineering Research Center (NPMM), City University of Hong Kong, Hong Kong, China
| | - Yao Yao
- Department of Chemistry, City University of Hong Kong, Kowloon, Hong Kong, China
| | - Qinxin Luo
- Department of Chemistry, City University of Hong Kong, Kowloon, Hong Kong, China
| | - Li Zhai
- Department of Chemistry, City University of Hong Kong, Kowloon, Hong Kong, China
- Hong Kong Branch of National Precious Metals Material Engineering Research Center (NPMM), City University of Hong Kong, Hong Kong, China
| | - Jingjie Ge
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR
| | - Yongwu Peng
- College of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou 310014, China
| | - Chengtao Gong
- College of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou 310014, China
| | - Meiting Zhao
- Institute of Molecular Aggregation Science, Department of Chemistry, Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Tianjin University, Tianjin 300072, China
| | - Yutian Qin
- Institute of Molecular Aggregation Science, Department of Chemistry, Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Tianjin University, Tianjin 300072, China
| | - Chen Ma
- Department of Chemistry, The Chinese University of Hong Kong, Shatin, Hong Kong, China
| | - Gang Wang
- Department of Chemistry, The Chinese University of Hong Kong, Shatin, Hong Kong, China
| | - Qingbo Wa
- Department of Chemistry, City University of Hong Kong, Kowloon, Hong Kong, China
| | - Xichen Zhou
- Department of Chemistry, City University of Hong Kong, Kowloon, Hong Kong, China
| | - Zijian Li
- Department of Chemistry, City University of Hong Kong, Kowloon, Hong Kong, China
| | - Siyuan Li
- Department of Chemistry, City University of Hong Kong, Kowloon, Hong Kong, China
| | - Wei Zhai
- Department of Chemistry, City University of Hong Kong, Kowloon, Hong Kong, China
| | - Hua Yang
- Department of Chemistry, City University of Hong Kong, Kowloon, Hong Kong, China
| | - Yi Ren
- Department of Chemistry, City University of Hong Kong, Kowloon, Hong Kong, China
| | - Yongji Wang
- Department of Chemistry, City University of Hong Kong, Kowloon, Hong Kong, China
| | - Lujing Li
- Department of Chemistry, City University of Hong Kong, Kowloon, Hong Kong, China
| | - Xinyang Ruan
- Department of Chemistry, City University of Hong Kong, Kowloon, Hong Kong, China
| | - Yuxuan Wu
- Department of Chemistry, City University of Hong Kong, Kowloon, Hong Kong, China
| | - Bo Chen
- State Key Laboratory of Organic Electronics and Information Displays & Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials, School of Chemistry and Life Sciences, Nanjing University of Posts and Telecommunications, Nanjing 210023, China
| | - Qipeng Lu
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Zhuangchai Lai
- Department of Applied Physics, The Hong Kong Polytechnic University, Hong Kong SAR, China
| | - Qiyuan He
- Department of Materials Science and Engineering, City University of Hong Kong, Hong Kong SAR, China
| | - Xiao Huang
- Institute of Advanced Materials (IAM), School of Flexible Electronics (SoFE), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (NanjingTech), Nanjing 211816, China
| | - Ye Chen
- Department of Chemistry, The Chinese University of Hong Kong, Shatin, Hong Kong, China
| | - Hua Zhang
- Department of Chemistry, City University of Hong Kong, Kowloon, Hong Kong, China
- Hong Kong Branch of National Precious Metals Material Engineering Research Center (NPMM), City University of Hong Kong, Hong Kong, China
- Shenzhen Research Institute, City University of Hong Kong, Shenzhen 518057, China
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4
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Zhao S, Wu X. Amorphization-mediated plasticity. NATURE MATERIALS 2023; 22:1057-1058. [PMID: 37644223 DOI: 10.1038/s41563-023-01638-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/31/2023]
Affiliation(s)
- Shiteng Zhao
- School of Materials Science and Engineering, Beihang University, Beijing, China.
- Tianmushan Laboratory, Hangzhou, China.
| | - Xiaolei Wu
- State Key Laboratory of Nonlinear Mechanics, Institute of Mechanics, Chinese Academy of Sciences, Beijing, China.
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Evidence for a rosiaite-structured high-pressure silica phase and its relation to lamellar amorphization in quartz. Nat Commun 2023; 14:606. [PMID: 36739276 PMCID: PMC9899207 DOI: 10.1038/s41467-023-36320-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2022] [Accepted: 01/26/2023] [Indexed: 02/06/2023] Open
Abstract
When affected by impact, quartz (SiO2) undergoes an abrupt transformation to glass lamellae, the planar deformation features (PDFs). This shock effect is the most reliable indicator of impacts and is decisive in identifying catastrophic collisions in the Earth´s record such as the Chicxulub impact. Despite the significance of PDFs, there is still no consensus how they form. Here, we present time-resolved in-situ synchroton X-ray diffraction data of single-crystal quartz rapidly compressed in a dynamic diamond anvil cell. These experiments provide evidence for the transformation of quartz at pressures above 15 GPa to lamellae of a metastable rosiaite (PbSb2O6)-type high-pressure phase with octahedrally coordinated silicon. This phase collapses during decompression to amorphous lamellae, which closely resemble PDFs in naturally shocked quartz. The identification of rosiaite-structured silica provides thus an explanation for lamellar amorphization of quartz. Furthermore, it suggests that the mixed phase region of the Hugoniot curve may be related to the progressive formation of rosiaite-structured silica.
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6
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Le Godec Y, Le Floch S. Recent Developments of High-Pressure Spark Plasma Sintering: An Overview of Current Applications, Challenges and Future Directions. MATERIALS (BASEL, SWITZERLAND) 2023; 16:ma16030997. [PMID: 36770003 PMCID: PMC9919817 DOI: 10.3390/ma16030997] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/16/2022] [Revised: 01/12/2023] [Accepted: 01/18/2023] [Indexed: 05/14/2023]
Abstract
Spark plasma sintering (SPS), also called pulsed electric current sintering (PECS) or field-assisted sintering technique (FAST) is a technique for sintering powder under moderate uniaxial pressure (max. 0.15 GPa) and high temperature (up to 2500 °C). It has been widely used over the last few years as it can achieve full densification of ceramic or metal powders with lower sintering temperature and shorter processing time compared to conventional processes, opening up new possibilities for nanomaterials densification. More recently, new frontiers of opportunities are emerging by coupling SPS with high pressure (up to ~10 GPa). A vast exciting field of academic research is now using high-pressure SPS (HP-SPS) in order to play with various parameters of sintering, like grain growth, structural stability and chemical reactivity, allowing the full densification of metastable or hard-to-sinter materials. This review summarizes the various benefits of HP-SPS for the sintering of many classes of advanced functional materials. It presents the latest research findings on various HP-SPS technologies with particular emphasis on their associated metrologies and their main outstanding results obtained. Finally, in the last section, this review lists some perspectives regarding the current challenges and future directions in which the HP-SPS field may have great breakthroughs in the coming years.
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Affiliation(s)
- Yann Le Godec
- Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie (IMPMC), Sorbonne Université, UMR CNRS 7590, Muséum National d’Histoire Naturelle, IRD UMR 206, 75005 Paris, France
- Correspondence: (Y.L.G.); (S.L.F.)
| | - Sylvie Le Floch
- Institut Lumière Matière, UMR5306 Université Lyon 1-CNRS, Université de Lyon, CEDEX, 69622 Villeurbanne, France
- Correspondence: (Y.L.G.); (S.L.F.)
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7
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Kobayashi T, Tsubokura Y, Oshima Y, Sasaki T, Kawaguchi K, Koga K, Uchida K, Shinohara N, Ajimi S, Kayashima T, Nakai M, Imatanaka N. Time‐course analysis of pulmonary inflammation induced by intratracheal instillation of nanosized crystalline silica particles in F344 rats. J Appl Toxicol 2022; 43:649-661. [PMID: 36317230 DOI: 10.1002/jat.4411] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2021] [Revised: 10/27/2022] [Accepted: 10/27/2022] [Indexed: 11/15/2022]
Abstract
Crystalline silica is an important cause of serious pulmonary diseases, and its toxic potential is known to be associated with its surface electrical properties. However, in vivo data clarifying the relevance of silica's toxic potential, especially its long-term effects, remain insufficient. To investigate the contribution of physico-chemical property including surface potential on the hazard of nanocrystalline silica, we performed single intratracheal instillation testing using five different crystalline silicas in a rat model and assessed time-course changes in pulmonary inflammation, lung burden, and thoracic lymph node loads. Silica-nanoparticles were prepared from two commercial products (Min-U-Sil5 [MS5] and SIO07PB [SPB]) using three different pretreatments: centrifugation (C), grinding (G), and surface dissolving (D). The five types of silica particles-MS5, MS5_C, SPB_C, SPB_G, and SPB_D-were intratracheally instilled into male F344 rats at doses of 0 mg/kg (purified water), 0.22 mg/kg (SPB), and 0.67, 2, or 6 mg/kg (MS5). Bronchoalveolar lavage, a lung burden analysis, and histopathological examination were performed at 3, 28, and 91 days after instillation. Granuloma formation was present in MS5 group at 91 days after instillation, although granuloma formation was suppressed in MS5_C group, which had a smaller particle size. SPB_C induced severe and progressive inflammation and kinetic lung overload, whereas SPB_G and SPB_D induced only slight and transient acute inflammation. Our results support that in vivo toxic potential of nanosilica by intratracheal instillation may involve with surface electrical properties leading to prolonged effect and may not be dependent not only on surface properties but also on other physico-chemical properties.
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Affiliation(s)
- Toshio Kobayashi
- Chemicals Evaluation and Research Institute, Japan, Hita 3‐822 Ishiimachi Hita‐shi Oita 877‐0061 Japan
| | - Yasuhiro Tsubokura
- Chemicals Evaluation and Research Institute, Japan, Hita 3‐822 Ishiimachi Hita‐shi Oita 877‐0061 Japan
| | - Yutaka Oshima
- Chemicals Evaluation and Research Institute, Japan, Hita 3‐822 Ishiimachi Hita‐shi Oita 877‐0061 Japan
| | - Takeshi Sasaki
- National Institute of Advanced Industrial Science and Technology Tsukuba Ibaraki Japan
| | - Kenji Kawaguchi
- National Institute of Advanced Industrial Science and Technology Tsukuba Ibaraki Japan
| | - Kenji Koga
- National Institute of Advanced Industrial Science and Technology Tsukuba Ibaraki Japan
| | - Kunio Uchida
- National Institute of Advanced Industrial Science and Technology Tsukuba Ibaraki Japan
| | - Naohide Shinohara
- National Institute of Advanced Industrial Science and Technology Tsukuba Ibaraki Japan
| | - Shozo Ajimi
- Chemicals Evaluation and Research Institute, Japan, Hita 3‐822 Ishiimachi Hita‐shi Oita 877‐0061 Japan
| | - Takakazu Kayashima
- Chemicals Evaluation and Research Institute, Japan, Hita 3‐822 Ishiimachi Hita‐shi Oita 877‐0061 Japan
| | - Makoto Nakai
- Chemicals Evaluation and Research Institute, Japan, Hita 3‐822 Ishiimachi Hita‐shi Oita 877‐0061 Japan
| | - Nobuya Imatanaka
- Chemicals Evaluation and Research Institute, Japan, Hita 3‐822 Ishiimachi Hita‐shi Oita 877‐0061 Japan
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8
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Yi S, Lee JH. Degenerate Lattice-Instability-Driven Amorphization under Compression in Metal Halide Perovskite CsPbI 3. J Phys Chem Lett 2022; 13:9449-9455. [PMID: 36194863 DOI: 10.1021/acs.jpclett.2c02047] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Halide perovskites have been intensively investigated for photovoltaic applications because of their good optoelectronic properties and low cost. Various high-pressure experiments have shown that these materials generally undergo reversible phase transitions between different crystalline phases as well as between crystalline and amorphous phases under external pressure. Herein, using first-principles density functional theory (DFT) and ab initio molecular dynamics (AIMD) calculations, we investigate the origin of the pressure-induced amorphization in CsPbI3. We find that the amorphous-like structures obtained from AIMD calculations become more stable than the orthorhombic Pbnm phase above 6.66 GPa, in good agreement with the experimental value (4.44 GPa). We further find that an imaginary flat band appears in the phonon dispersion of the orthorhombic CsPbI3 phase across the Brillouin zone at 10 GPa, leading to degenerate lattice instabilities. These energetically degenerate phonon modes are related to PbI6 octahedral tilting modes and provide random local distortions, leading to amorphization.
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Affiliation(s)
- Seho Yi
- Computational Science Research Center, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea
| | - Jung-Hoon Lee
- Computational Science Research Center, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea
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9
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Morphology Tuned Pressure Induced Amorphization in VO2(B) Nanobelts. INORGANICS 2022. [DOI: 10.3390/inorganics10080122] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Pressure-induced amorphization (PIA) has drawn great attention since it was first observed in ice. This process depends closely on the crystal structure, the size, the morphology and the correlated pressurization environments, among which the morphology-tuned PIA remains an open question on the widely concerned mesoscale. In this work, we report the synthesis and high-pressure research of VO2(B) nanobelts. XRD and TEM were performed to investigate the amorphization process. The amorphization pressure in VO2(B) nanobelts(~30 GPa) is much higher than that in previous reported 2D VO2(B) nanosheets(~21 GPa), the mechanism is the disruption of connectivity at particular relatively weaker bonds in the (010) plane. These results suggest a morphology-tuned pressure-induced amorphization, which could promote the fundamental understanding of PIA.
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10
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Wang K, Molteni C, Haynes PD. Localized Soft Vibrational Modes and Coherent Structural Phase Transformations in Rutile TiO 2 Nanoparticles under Negative Pressure. NANO LETTERS 2022; 22:5922-5928. [PMID: 35797495 PMCID: PMC9335867 DOI: 10.1021/acs.nanolett.2c01939] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
We study the effect of size on the vibrational modes and frequencies of nanoparticles, by applying a newly developed, robust, and efficient first-principles-based method that we present in outline. We focus on rutile TiO2, a technologically important material whose bulk exhibits a softening of a transverse acoustic mode close to q=(12,12,14), which becomes unstable with the application of negative pressure. We demonstrate that, under these conditions, nanoparticles above a critical size exhibit unstable localized modes and we calculate their characteristic localization length and decomposition with respect to bulk phonons. We propose that such localized soft modes could initiate coherent structural phase transformations in small nanoparticles above a critical size.
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Affiliation(s)
- Kang Wang
- Imperial
College London, Department of Materials, Exhibition Road, London SW7 2AZ, U.K.
| | - Carla Molteni
- King’s
College London, Department of Physics, Strand, London WC2R 2LS, U.K.
| | - Peter D. Haynes
- Imperial
College London, Department of Materials, Exhibition Road, London SW7 2AZ, U.K.
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11
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Coexistence of vitreous and crystalline phases of H 2O at ambient temperature. Proc Natl Acad Sci U S A 2022; 119:e2117281119. [PMID: 35763575 PMCID: PMC9271169 DOI: 10.1073/pnas.2117281119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Understanding the phase behavior of H2O is essential in geoscience, extreme biology, biological imaging, chemistry, and physics. Vitreous phases of H2O are of particular importance since these phases avoid the typical expansion of H2O during ice-crystal formation. Here, we confirm the existence of vitreous ice and ice VI in mixed-phase samples of H2O at room temperature and high pressure. We show how Raman scattering and X-ray diffraction alone lead to misleading characterization and understanding of the mixed-phase material, a conclusion supported by molecular dynamics simulations. The coexistence of vitreous and crystalline components of H2O under these conditions is crucial for experimental studies of biological systems. The results have implications for related metastable transitions in other materials under pressure. Formation of vitreous ice during rapid compression of water at room temperature is important for biology and the study of biological systems. Here, we show that Raman spectra of rapidly compressed water at greater than 1 GPa at room temperature exhibits the signature of high-density amorphous ice, whereas the X-ray diffraction (XRD) pattern is dominated by crystalline ice VI. To resolve this apparent contradiction, we used molecular dynamics simulations to calculate full vibrational spectra and diffraction patterns of mixtures of vitreous ice and ice VI, including embedded interfaces between the two phases. We show quantitatively that Raman spectra, which probe the local polarizability with respect to atomic displacements, are dominated by the vitreous phase, whereas a small amount of the crystalline component is readily apparent by XRD. The results of our combined experimental and theoretical studies have implications for detecting vitreous phases of water, survival of biological systems under extreme conditions, and biological imaging. The results provide additional insight into the stable and metastable phases of H2O as a function of pressure and temperature, as well as of other materials undergoing pressure-induced amorphization and other metastable transitions.
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12
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Tsuchiya T, Nakagawa S. A new high-pressure structure of SiO 2directly converted from α-quartz under nonhydrostatic compression. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2022; 34:304003. [PMID: 35552264 DOI: 10.1088/1361-648x/ac6f3a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2022] [Accepted: 05/12/2022] [Indexed: 06/15/2023]
Abstract
High-pressure behavior of SiO2is one of the prototypical subjects in several research areas including condensed matter physics, inorganic chemistry, mineralogy, materials science, and crystallography. Therefore, numerous studies have been performed on the structure evolution of SiO2under pressure. Here, we show a new structure directly converted fromα-quartz under uniaxial compression. Ourab initiocalculations elucidate a simple transition pathway fromα-quartz to the Fe2P-type phase, and an intermediate state with the Li2ZrF6-type structure appears in this structure conversion. Some interesting properties are found on this intermediate state. (1) The Li2ZrF6-type phase is metastable probably due to a volumetric unbalance between the Li and Zr sites but becomes more energetically stable thanα-quartz over ∼12 GPa. (2) It is vibrationally stable at 0 GPa, suggesting that this phase can be recovered down to ambient condition once synthesized. (3) The crystal structures of Li2ZrF6-type SiO2and phase D, one of dense magnesium hydrous silicates, are found identical, suggesting the stabilization of their solid solution under high-P,Tcondition.
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Affiliation(s)
- Taku Tsuchiya
- Geodynamics Research Center, Ehime University, Ehime 790-8577, Japan
| | - Saito Nakagawa
- Geodynamics Research Center, Ehime University, Ehime 790-8577, Japan
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13
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Zhu SC, Chen GW, Zhang D, Xu L, Liu ZP, Mao HK, Hu Q. Topological Ordering of Memory Glass on Extended Length Scales. J Am Chem Soc 2022; 144:7414-7421. [PMID: 35420809 DOI: 10.1021/jacs.2c01717] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Identifying ordering in non-crystalline solids has been a focus of natural science since the publication of Zachariasen's random network theory in 1932, but it still remains as a great challenge of the century. Literature shows that the hierarchical structures, from the short-range order of first-shell polyhedra to the long-range order of translational periodicity, may survive after amorphization. Here, in a piece of AlPO4, or berlinite, we combine X-ray diffraction and stochastic free-energy surface simulations to study its phase transition and structural ordering under pressure. From reversible single crystals to amorphous transitions, we now present an unambiguous view of the topological ordering in the amorphous phase, consisting of a swarm of Carpenter low-symmetry phases with the same topological linkage, trapped in a metastable intermediate stage. We propose that the remaining topological ordering is the origin of the switchable "memory glass" effect. Such topological ordering may hide in many amorphous materials through disordered short atomic displacements.
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Affiliation(s)
- Sheng-Cai Zhu
- School of Materials, Shenzhen Campus of Sun Yat-sen University, Shenzhen 518107, China
| | - Gu-Wen Chen
- School of Materials, Shenzhen Campus of Sun Yat-sen University, Shenzhen 518107, China
| | - Dongzhou Zhang
- Hawai'i Institute of Geophysics and Planetology, School of Ocean Earth Science and Technology, University of Hawai'i at Manoa, Honolulu, Hawaii 96822, United States
| | - Liang Xu
- National Key Laboratory of Shock Wave and Detonation Physics, Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621900, China
| | - Zhi-Pan Liu
- Collaborative Innovation Center of Chemistry for Energy Material, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Key Laboratory of Computational Physical Science, Department of Chemistry, Fudan University, Shanghai 200433, China
| | - Ho-Kwang Mao
- Center for High Pressure Science and Technology Advanced Research (HPSTAR), Beijing 100094, China
| | - Qingyang Hu
- Center for High Pressure Science and Technology Advanced Research (HPSTAR), Beijing 100094, China.,CAS Center for Excellence in Deep Earth Science, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
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14
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Marshall MC, Millot M, Fratanduono DE, Sterbentz DM, Myint PC, Belof JL, Kim YJ, Coppari F, Ali SJ, Eggert JH, Smith RF, McNaney JM. Metastability of Liquid Water Freezing into Ice VII under Dynamic Compression. PHYSICAL REVIEW LETTERS 2021; 127:135701. [PMID: 34623849 DOI: 10.1103/physrevlett.127.135701] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2021] [Revised: 07/23/2021] [Accepted: 08/30/2021] [Indexed: 06/13/2023]
Abstract
The ubiquitous nature and unusual properties of water have motivated many studies on its metastability under temperature- or pressure-induced phase transformations. Here, nanosecond compression by a high-power laser is used to create the nonequilibrium conditions where liquid water persists well into the stable region of ice VII. Through our experiments, as well as a complementary theoretical-computational analysis based on classical nucleation theory, we report that the metastability limit of liquid water under nearly isentropic compression from ambient conditions is at least 8 GPa, higher than the 7 GPa previously reported for lower loading rates.
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Affiliation(s)
- M C Marshall
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
- Laboratory for Laser Energetics, Rochester, New York 14623, USA
| | - M Millot
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - D E Fratanduono
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - D M Sterbentz
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
- Department of Mechanical and Aerospace Engineering, University of California, Davis, California 95616, USA
| | - P C Myint
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - J L Belof
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - Y-J Kim
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - F Coppari
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - S J Ali
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - J H Eggert
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - R F Smith
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - J M McNaney
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
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15
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Sereika R, Kim S, Nakagawa T, Ishii H, Ding Y, Mao HK. Quenchable amorphous glass-like material from VF 3. Dalton Trans 2021; 50:3005-3010. [PMID: 33566052 DOI: 10.1039/d1dt00033k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The quite simple but relatively stable VF3-type compounds are known to be of major interest due to their building blocks - octahedra that are extremely important in perovskites as well. Here, we show that the VF6 octahedron in VF3 varies over a fairly wide pressure range (0-50 GPa), maintaining undisturbed rhombohedral crystal symmetry. Half of this pressure, VF6 rotates easily while the other undergoes strong uniaxial deformation in a "super-dense" condition. The congested sphere packing ultimately does not endure and drives the material to amorphize. We observed that the amorphous state could be quenched and acquire a transparent glass-like appearance when unloaded to ambient conditions. Dramatic, pressure-induced changes are clarified by phonon dispersion curves with the imaginary phonon mode, the so-called phonon soft mode, which indicates the structural instability. The distortion of the VF6 octahedra is attributed to the distinctive amorphization that could be further searched for throughout the whole almost identical VF3-type series providing metal trifluorides of various amorphous species.
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Affiliation(s)
- Raimundas Sereika
- Center for High Pressure Science and Technology Advanced Research, Beijing 100094, China. and Vytautas Magnus University, K. Donelaičio Str. 58, Kaunas 44248, Lithuania.
| | - Sooran Kim
- Department of Physics Education, Kyungpook National University, Daegu 41566, Korea
| | - Takeshi Nakagawa
- Center for High Pressure Science and Technology Advanced Research, Beijing 100094, China.
| | - Hirofumi Ishii
- National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan
| | - Yang Ding
- Center for High Pressure Science and Technology Advanced Research, Beijing 100094, China.
| | - Ho-Kwang Mao
- Center for High Pressure Science and Technology Advanced Research, Beijing 100094, China.
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16
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Reddy KM, Guo D, Song S, Cheng C, Han J, Wang X, An Q, Chen M. Dislocation-mediated shear amorphization in boron carbide. SCIENCE ADVANCES 2021; 7:7/8/eabc6714. [PMID: 33597237 PMCID: PMC7888984 DOI: 10.1126/sciadv.abc6714] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Accepted: 12/23/2020] [Indexed: 05/09/2023]
Abstract
The failure of superhard materials is often associated with stress-induced amorphization. However, the underlying mechanisms of the structural evolution remain largely unknown. Here, we report the experimental measurements of the onset of shear amorphization in single-crystal boron carbide by nanoindentation and transmission electron microscopy. We verified that rate-dependent loading discontinuity, i.e., pop-in, in nanoindentation load-displacement curves results from the formation of nanosized amorphous bands via shear amorphization. Stochastic analysis of the pop-in events reveals an exceptionally small activation volume, slow nucleation rate, and lower activation energy of the shear amorphization, suggesting that the high-pressure structural transition is activated and initiated by dislocation nucleation. This dislocation-mediated amorphization has important implications in understanding the failure mechanisms of superhard materials at stresses far below their theoretical strengths.
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Affiliation(s)
- Kolan Madhav Reddy
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Dezhou Guo
- Chemical and Materials Engineering Department, University of Nevada, Reno, NV 89557, USA
| | - Shuangxi Song
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Chun Cheng
- WPI Advanced Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
| | - Jiuhui Han
- WPI Advanced Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
| | - Xiaodong Wang
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Qi An
- Chemical and Materials Engineering Department, University of Nevada, Reno, NV 89557, USA
| | - Mingwei Chen
- WPI Advanced Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan.
- Department of Materials Science and Engineering, Johns Hopkins University, Baltimore, MD 21218, USA
- Hopkins Extreme Materials Institute, Johns Hopkins University, Baltimore, MD 21218, USA
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17
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18
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Fonda E, Polian A, Shinmei T, Irifune T, Itié JP. Mechanism of pressure induced amorphization of SnI4: A combined x-ray diffraction—x-ray absorption spectroscopy study. J Chem Phys 2020; 153:064501. [DOI: 10.1063/5.0012802] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Emiliano Fonda
- Synchrotron SOLEIL, L’Orme des Merisiers, St. Aubin BP48, 91192 Gif sur Yvette Cedex, France
| | - Alain Polian
- Synchrotron SOLEIL, L’Orme des Merisiers, St. Aubin BP48, 91192 Gif sur Yvette Cedex, France
- Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie - CNRS UMR 7590, Sorbonne Université, 4 Place Jussieu, 75005 Paris, France
| | - Toru Shinmei
- Geodynamics Research Center, Ehime University, 2–5 Bunkyo-cho, Matsuyama 790-8577, Japan
| | - Tetsuo Irifune
- Geodynamics Research Center, Ehime University, 2–5 Bunkyo-cho, Matsuyama 790-8577, Japan
- Earth-Life Science Institute, Tokyo Institute of Technology, Tokyo 152-8500, Japan
| | - Jean-Paul Itié
- Synchrotron SOLEIL, L’Orme des Merisiers, St. Aubin BP48, 91192 Gif sur Yvette Cedex, France
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19
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Tracy SJ, Turneaure SJ, Duffy TS. Structural response of α-quartz under plate-impact shock compression. SCIENCE ADVANCES 2020; 6:eabb3913. [PMID: 32923639 PMCID: PMC7449673 DOI: 10.1126/sciadv.abb3913] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2020] [Accepted: 07/14/2020] [Indexed: 05/14/2023]
Abstract
Because of its far-reaching applications in geophysics and materials science, quartz has been one of the most extensively examined materials under dynamic compression. Despite 50 years of active research, questions remain concerning the structure and transformation of SiO2 under shock compression. Continuum gas-gun studies have established that under shock loading quartz transforms through an assumed mixed-phase region to a dense high-pressure phase. While it has often been assumed that this high-pressure phase corresponds to the stishovite structure observed in static experiments, there have been no crystal structure data confirming this. In this study, we use gas-gun shock compression coupled with in situ synchrotron x-ray diffraction to interrogate the crystal structure of shock-compressed α-quartz up to 65 GPa. Our results reveal that α-quartz undergoes a phase transformation to a disordered metastable phase as opposed to crystalline stishovite or an amorphous structure, challenging long-standing assumptions about the dynamic response of this fundamental material.
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Affiliation(s)
- Sally June Tracy
- Department of Geosciences, Princeton University, Princeton, NJ 08544, USA
- Geophysical Laboratory, Carnegie Institution for Science, Washington, DC 20015, USA
- Corresponding author.
| | - Stefan J. Turneaure
- Institute for Shock Physics, Washington State University, Pullman, WA 99164, USA
| | - Thomas S. Duffy
- Department of Geosciences, Princeton University, Princeton, NJ 08544, USA
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20
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Zhang H, Tóth O, Liu XD, Bini R, Gregoryanz E, Dalladay-Simpson P, De Panfilis S, Santoro M, Gorelli FA, Martoňák R. Pressure-induced amorphization and existence of molecular and polymeric amorphous forms in dense SO 2. Proc Natl Acad Sci U S A 2020; 117:8736-8742. [PMID: 32245813 PMCID: PMC7183191 DOI: 10.1073/pnas.1917749117] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
We report here the pressure-induced amorphization and reversible structural transformation between two amorphous forms of SO2: molecular amorphous and polymeric amorphous, with the transition found at 26 GPa over a broad temperature regime, 77 K to 300 K. The transformation was observed by both Raman spectroscopy and X-ray diffraction in a diamond anvil cell. The results were corroborated by ab initio molecular dynamics simulations, where both forward and reverse transitions were detected, opening a window to detailed analysis of the respective local structures. The high-pressure polymeric amorphous form was found to consist mainly of disordered polymeric chains made of three-coordinated sulfur atoms connected via oxygen atoms, with few residual intact molecules. This study provides an example of polyamorphism in a system consisting of simple molecules with multiple bonds.
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Affiliation(s)
- Huichao Zhang
- Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, China
- University of Science and Technology of China, Hefei 230026, China
| | - Ondrej Tóth
- Department of Experimental Physics, Faculty of Mathematics, Physics and Informatics, Comenius University, 842 48 Bratislava, Slovakia
| | - Xiao-Di Liu
- Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, China;
| | - Roberto Bini
- Department of Chemistry, University of Florence, 50121 Florence, Italy
- European Laboratory for Non-Linear Spectroscopy, 50019 Sesto Fiorentino, Italy
| | - Eugene Gregoryanz
- Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, China
- School of Physics and Astronomy, University of Edinburgh, Edinburgh EH9 3JZ, United Kingdom
- Centre for Science at Extreme Conditions, University of Edinburgh, Edinburgh EH9 3JZ, United Kingdom
- Center for High Pressure Science Technology Advanced Research, Shanghai, 201203, China
| | | | - Simone De Panfilis
- Centre for Life Nano Science, Istituto Italiano di Tecnologia, 00161 Rome, Italy
| | - Mario Santoro
- Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, China;
- European Laboratory for Non-Linear Spectroscopy, 50019 Sesto Fiorentino, Italy
- Istituto Nazionale di Ottica, Consiglio Nazionale delle Ricerche (CNR-INO), 50125 Florence, Italy
| | - Federico Aiace Gorelli
- Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, China;
- European Laboratory for Non-Linear Spectroscopy, 50019 Sesto Fiorentino, Italy
- Istituto Nazionale di Ottica, Consiglio Nazionale delle Ricerche (CNR-INO), 50125 Florence, Italy
| | - Roman Martoňák
- Department of Experimental Physics, Faculty of Mathematics, Physics and Informatics, Comenius University, 842 48 Bratislava, Slovakia;
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21
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Abstract
Phase has emerged as an important structural parameter - in addition to composition, morphology, architecture, facet, size and dimensionality - that determines the properties and functionalities of nanomaterials. In particular, unconventional phases in nanomaterials that are unattainable in the bulk state can potentially endow nanomaterials with intriguing properties and innovative applications. Great progress has been made in the phase engineering of nanomaterials (PEN), including synthesis of nanomaterials with unconventional phases and phase transformation of nanomaterials. This Review provides an overview on the recent progress in PEN. We discuss various strategies used to synthesize nanomaterials with unconventional phases and induce phase transformation of nanomaterials, by taking noble metals and layered transition metal dichalcogenides as typical examples. Moreover, we also highlight recent advances in the preparation of amorphous nanomaterials, amorphous-crystalline and crystal phase-based hetero-nanostructures. We also provide personal perspectives on challenges and opportunities in this emerging field, including exploration of phase-dependent properties and applications, rational design of phase-based heterostructures and extension of the concept of phase engineering to a wider range of materials.
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22
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Nabata H, Takagi M, Saita K, Maeda S. Computational searches for crystal structures of dioxides of group 14 elements (CO 2, SiO 2, GeO 2) under ultrahigh pressure. RSC Adv 2020; 10:22156-22163. [PMID: 35516614 PMCID: PMC9054535 DOI: 10.1039/d0ra03359f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2020] [Accepted: 06/03/2020] [Indexed: 01/20/2023] Open
Abstract
In this study, we focused on the effect of pressure on the crystal structures of dioxides of group 14 elements, i.e. SiO2, GeO2, and CO2.
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Affiliation(s)
- Hitoshi Nabata
- Graduate School of Chemical Sciences and Engineering
- Hokkaido University
- Sapporo 060-8628
- Japan
| | - Makito Takagi
- Graduate School of Nanobioscience
- Yokohama City University
- Yokohama
- Japan
| | - Kenichiro Saita
- Department of Chemistry
- Faculty of Science
- Hokkaido University
- Sapporo 060-0810
- Japan
| | - Satoshi Maeda
- Department of Chemistry
- Faculty of Science
- Hokkaido University
- Sapporo 060-0810
- Japan
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23
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Cheng B, Lou H, Sarkar A, Zeng Z, Zhang F, Chen X, Tan L, Prakapenka V, Greenberg E, Wen J, Djenadic R, Hahn H, Zeng Q. Pressure-induced tuning of lattice distortion in a high-entropy oxide. Commun Chem 2019. [DOI: 10.1038/s42004-019-0216-2] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Abstract
As a new class of multi-principal component oxides with high chemical disorder, high-entropy oxides (HEOs) have attracted much attention. The stability and tunability of their structure and properties are of great interest and importance, but remain unclear. By using in situ synchrotron radiation X-ray diffraction, Raman spectroscopy, ultraviolet–visible absorption spectroscopy, and ex situ high-resolution transmission electron microscopy, here we show the existence of lattice distortion in the crystalline (Ce0.2La0.2Pr0.2Sm0.2Y0.2)O2−δ HEO according to the deviation of bond angles from the ideal values, and discover a pressure-induced continuous tuning of lattice distortion (bond angles) and band gap. As continuous bending of bond angles, pressure eventually induces breakdown of the long-range connectivity of lattice and causes amorphization. The amorphous state can be partially recovered upon decompression, forming glass–nanoceramic composite HEO. These results reveal the unexpected flexibility of the structure and properties of HEOs, which could promote the fundamental understanding and applications of HEOs.
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24
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Bhattacharyya S, Sobczak S, Półrolniczak A, Roy S, Samanta D, Katrusiak A, Maji TK. Dynamic Resolution of Piezosensitivity in Single Crystals of π‐Conjugated Molecules. Chemistry 2019; 25:6092-6097. [DOI: 10.1002/chem.201900054] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2019] [Revised: 02/27/2019] [Indexed: 11/10/2022]
Affiliation(s)
- Sohini Bhattacharyya
- Chemistry and Physics of Materials Unit, School of Advanced Materials (SAMat)Jawaharlal Nehru Centre for Advanced Scientific Research Bangalore 560064 India
| | - Szymon Sobczak
- Faculty of ChemistryAdam Mickiewicz University Umultowska 89b 61-614 Poznań Poland
| | | | - Syamantak Roy
- Chemistry and Physics of Materials Unit, School of Advanced Materials (SAMat)Jawaharlal Nehru Centre for Advanced Scientific Research Bangalore 560064 India
| | - Debabrata Samanta
- Chemistry and Physics of Materials Unit, School of Advanced Materials (SAMat)Jawaharlal Nehru Centre for Advanced Scientific Research Bangalore 560064 India
| | - Andrzej Katrusiak
- Faculty of ChemistryAdam Mickiewicz University Umultowska 89b 61-614 Poznań Poland
| | - Tapas Kumar Maji
- Chemistry and Physics of Materials Unit, School of Advanced Materials (SAMat)Jawaharlal Nehru Centre for Advanced Scientific Research Bangalore 560064 India
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25
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Widmer RN, Lampronti GI, Anzellini S, Gaillac R, Farsang S, Zhou C, Belenguer AM, Wilson CW, Palmer H, Kleppe AK, Wharmby MT, Yu X, Cohen SM, Telfer SG, Redfern SAT, Coudert FX, MacLeod SG, Bennett TD. Pressure promoted low-temperature melting of metal-organic frameworks. NATURE MATERIALS 2019; 18:370-376. [PMID: 30886398 DOI: 10.1038/s41563-019-0317-4] [Citation(s) in RCA: 78] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2018] [Accepted: 02/08/2019] [Indexed: 06/09/2023]
Abstract
Metal-organic frameworks (MOFs) are microporous materials with huge potential for chemical processes. Structural collapse at high pressure, and transitions to liquid states at high temperature, have recently been observed in the zeolitic imidazolate framework (ZIF) family of MOFs. Here, we show that simultaneous high-pressure and high-temperature conditions result in complex behaviour in ZIF-62 and ZIF-4, with distinct high- and low-density amorphous phases occurring over different regions of the pressure-temperature phase diagram. In situ powder X-ray diffraction, Raman spectroscopy and optical microscopy reveal that the stability of the liquid MOF state expands substantially towards lower temperatures at intermediate, industrially achievable pressures and first-principles molecular dynamics show that softening of the framework coordination with pressure makes melting thermodynamically easier. Furthermore, the MOF glass formed by melt quenching the high-temperature liquid possesses permanent, accessible porosity. Our results thus imply a route to the synthesis of functional MOF glasses at low temperatures, avoiding decomposition on heating at ambient pressure.
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Affiliation(s)
- Remo N Widmer
- Department of Earth Sciences, University of Cambridge, Cambridge, UK
| | | | - Simone Anzellini
- Diamond Light Source Ltd, Harwell Science and Innovation Campus, Didcot, UK
| | - Romain Gaillac
- Chimie ParisTech, PSL University, CNRS, Institut de Recherche de Chimie Paris, Paris, France
| | - Stefan Farsang
- Department of Earth Sciences, University of Cambridge, Cambridge, UK
| | - Chao Zhou
- Department of Chemistry and Bioscience, Aalborg University, Aalborg, Denmark
| | - Ana M Belenguer
- Department of Chemistry, University of Cambridge, Cambridge, UK
| | | | - Hannah Palmer
- Department of Materials Sciences & Metallurgy, University of Cambridge, Cambridge, UK
| | - Annette K Kleppe
- Diamond Light Source Ltd, Harwell Science and Innovation Campus, Didcot, UK
| | - Michael T Wharmby
- Diamond Light Source Ltd, Harwell Science and Innovation Campus, Didcot, UK
- Deutsches Elektronen-Synchrotron (DESY), Hamburg, Germany
| | - Xiao Yu
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, CA, USA
| | - Seth M Cohen
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, CA, USA
| | - Shane G Telfer
- MacDiarmid Institute for Advanced Materials and Nanotechnology, Institute of Fundamental Sciences, Massey University, Palmerston North, New Zealand
| | - Simon A T Redfern
- Department of Earth Sciences, University of Cambridge, Cambridge, UK
| | - François-Xavier Coudert
- Chimie ParisTech, PSL University, CNRS, Institut de Recherche de Chimie Paris, Paris, France
| | - Simon G MacLeod
- Atomic Weapons Establishment, Aldermaston, UK
- SUPA, School of Physics & Astronomy, and Centre for Science at Extreme Conditions, University of Edinburgh, Edinburgh, UK
| | - Thomas D Bennett
- Department of Materials Sciences & Metallurgy, University of Cambridge, Cambridge, UK.
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26
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Guan Z, Li Q, Zhang H, Shen P, Zheng L, Chu S, Park C, Hong X, Liu R, Wang P, Liu B, Shen G. Pressure induced transformation and subsequent amorphization of monoclinic Nb 2O 5 and its effect on optical properties. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2019; 31:105401. [PMID: 30566910 DOI: 10.1088/1361-648x/aaf9bd] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Pressure-induced phase transitions of monoclinic H-Nb2O5 have been studied by in situ synchrotron x-ray diffraction, pair distribution function (PDF) analysis, and Raman and optical transmission spectroscopy. The initial monoclinic phase is found to transform into an orthorhombic phase at ~9 GPa and then change to an amorphous form above 21.4 GPa. The PDF data reveal that the amorphization is associated with disruptions of the long-range order of the NbO6 octahedra and the NbO7 pentagonal bipyramids, whereas the local edge-shares of octahedra and the local linkages of pentagonal bipyramids are largely preserved in their nearest neighbors. Upon compression, the transmittance of the sample in a region from visible to near infrared (450-1000 nm) starts to increase above 8.0 GPa and displays a dramatic enhancement above 22.2 GPa, indicating that the amorphous form has a high transmittance. The pressure-induced amorphous form is found to be recoverable under pressure release, and maintain high optical transmittance property at ambient conditions. The recoverable pressure induced amorphous material promises for applications in multifunctional materials.
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Affiliation(s)
- Zhou Guan
- State Key Laboratory of Superhard Materials, Jilin University, Changchun 130012, People's Republic of China
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27
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Zhang F, Lou H, Cheng B, Zeng Z, Zeng Q. High-Pressure Induced Phase Transitions in High-Entropy Alloys: A Review. ENTROPY 2019; 21:e21030239. [PMID: 33266954 PMCID: PMC7514720 DOI: 10.3390/e21030239] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/24/2019] [Revised: 02/22/2019] [Accepted: 02/26/2019] [Indexed: 11/28/2022]
Abstract
High-entropy alloys (HEAs) as a new class of alloy have been at the cutting edge of advanced metallic materials research in the last decade. With unique chemical and topological structures at the atomic level, HEAs own a combination of extraordinary properties and show potential in widespread applications. However, their phase stability/transition, which is of great scientific and technical importance for materials, has been mainly explored by varying temperature. Recently, pressure as another fundamental and powerful parameter has been introduced to the experimental study of HEAs. Many interesting reversible/irreversible phase transitions that were not expected or otherwise invisible before have been observed by applying high pressure. These recent findings bring new insight into the stability of HEAs, deepens our understanding of HEAs, and open up new avenues towards developing new HEAs. In this paper, we review recent results in various HEAs obtained using in situ static high-pressure synchrotron radiation x-ray techniques and provide some perspectives for future research.
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Affiliation(s)
- Fei Zhang
- Center for High Pressure Science and Technology Advanced Research, Pudong, Shanghai 201203, China
- State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China
| | - Hongbo Lou
- Center for High Pressure Science and Technology Advanced Research, Pudong, Shanghai 201203, China
| | - Benyuan Cheng
- Center for High Pressure Science and Technology Advanced Research, Pudong, Shanghai 201203, China
- China Academy of Engineering Physics, Mianyang 621900, China
| | - Zhidan Zeng
- Center for High Pressure Science and Technology Advanced Research, Pudong, Shanghai 201203, China
| | - Qiaoshi Zeng
- Center for High Pressure Science and Technology Advanced Research, Pudong, Shanghai 201203, China
- Jiangsu Key Laboratory of Advanced Metallic Materials, School of Materials Science and Engineering, Southeast University, Nanjing 211189, China
- Correspondence: ; Tel.: +86-021-8017-7102
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Huang Y, He Y, Sheng H, Lu X, Dong H, Samanta S, Dong H, Li X, Kim DY, Mao HK, Liu Y, Li H, Li H, Wang L. Li-ion battery material under high pressure: amorphization and enhanced conductivity of Li 4Ti 5O 12. Natl Sci Rev 2019; 6:239-246. [PMID: 34691862 PMCID: PMC8291545 DOI: 10.1093/nsr/nwy122] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2018] [Revised: 10/09/2018] [Accepted: 10/11/2018] [Indexed: 11/13/2022] Open
Abstract
Lithium titanium oxide (Li4Ti5O12, LTO), a 'zero-strain' anode material for lithium-ion batteries, exhibits excellent cycling performance. However, its poor conductivity highly limits its applications. Here, the structural stability and conductivity of LTO were studied using in situ high-pressure measurements and first-principles calculations. LTO underwent a pressure-induced amorphization (PIA) at 26.9 GPa. The impedance spectroscopy revealed that the conductivity of LTO improved significantly after amorphization and that the conductivity of decompressed amorphous LTO increased by an order of magnitude compared with its starting phase. Furthermore, our calculations demonstrated that the different compressibility of the LiO6 and TiO6 octahedra in the structure was crucial for the PIA. The amorphous phase promotes Li+ diffusion and enhances its ionic conductivity by providing defects for ion migration. Our results not only provide an insight into the pressure depended structural properties of a spinel-like material, but also facilitate exploration of the interplay between PIA and conductivity.
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Affiliation(s)
- Yanwei Huang
- Center for High Pressure Science and Technology Advanced Research, Shanghai 201203, China
- College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou 310018, China
| | - Yu He
- Center for High Pressure Science and Technology Advanced Research, Shanghai 201203, China
- Key Laboratory of High-temperature and High-pressure Study of the Earth's Interior, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China
| | - Howard Sheng
- Center for High Pressure Science and Technology Advanced Research, Shanghai 201203, China
- Department of Physics and Astronomy, George Mason University, Fairfax VA 22030, USA
| | - Xia Lu
- State Key Laboratory of Organic-Inorganic Composites, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, College of Energy, Beijing University of Chemical Engineering, Beijing 100029, China
| | - Haini Dong
- Center for High Pressure Science and Technology Advanced Research, Shanghai 201203, China
- Key Laboratory of High-temperature and High-pressure Study of the Earth's Interior, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China
| | - Sudeshna Samanta
- Center for High Pressure Science and Technology Advanced Research, Shanghai 201203, China
| | - Hongliang Dong
- Center for High Pressure Science and Technology Advanced Research, Shanghai 201203, China
| | - Xifeng Li
- School of Mechatronic Engineering and Automation, Shanghai University, Shanghai 200072, China
| | - Duck Young Kim
- Center for High Pressure Science and Technology Advanced Research, Shanghai 201203, China
| | - Ho-kwang Mao
- Center for High Pressure Science and Technology Advanced Research, Shanghai 201203, China
- Geophysical Laboratory, Carnegie Institution, Washington, DC 20015, USA
| | - Yuzi Liu
- Center for Nanoscale Materials, Argonne National Laboratory, Argonne, IL 60439, USA
| | - Heping Li
- Key Laboratory of High-temperature and High-pressure Study of the Earth's Interior, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China
| | - Hong Li
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Lin Wang
- Center for High Pressure Science and Technology Advanced Research, Shanghai 201203, China
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Earthquake lubrication and healing explained by amorphous nanosilica. Nat Commun 2019; 10:320. [PMID: 30659201 PMCID: PMC6338773 DOI: 10.1038/s41467-018-08238-y] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2017] [Accepted: 12/21/2018] [Indexed: 11/29/2022] Open
Abstract
During earthquake propagation, geologic faults lose their strength, then strengthen as slip slows and stops. Many slip-weakening mechanisms are active in the upper-mid crust, but healing is not always well-explained. Here we show that the distinct structure and rate-dependent properties of amorphous nanopowder (not silica gel) formed by grinding of quartz can cause extreme strength loss at high slip rates. We propose a weakening and related strengthening mechanism that may act throughout the quartz-bearing continental crust. The action of two slip rate-dependent mechanisms offers a plausible explanation for the observed weakening: thermally-enhanced plasticity, and particulate flow aided by hydrodynamic lubrication. Rapid cooling of the particles causes rapid strengthening, and inter-particle bonds form at longer timescales. The timescales of these two processes correspond to the timescales of post-seismic healing observed in earthquakes. In natural faults, this nanopowder crystallizes to quartz over 10s–100s years, leaving veins which may be indistinguishable from common quartz veins. Tectonic faults weaken during slip in order to accelerate and produce earthquakes. Here the authors show a mechanism for weakening faults through the transformation of quartz to amorphous nanoparticulate wear powders that lubricate friction experiments, and transform back to quartz under geologic conditions.
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30
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Huang C, Klinzing G, Procopio A, Yang F, Ren J, Burlage R, Zhu L, Su Y. Understanding Compression-Induced Amorphization of Crystalline Posaconazole. Mol Pharm 2018; 16:825-833. [DOI: 10.1021/acs.molpharmaceut.8b01122] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Chengbin Huang
- Pharmaceutical Sciences, MRL, Merck & Co., Inc., Kenilworth, New Jersey 07033 United States
- School of Pharmacy, University of Wisconsin-Madison, Madison, Wisconsin 53705 United States
| | - Gerard Klinzing
- Pharmaceutical Sciences, MRL, Merck & Co., Inc., Kenilworth, New Jersey 07033 United States
| | - Adam Procopio
- Pharmaceutical Sciences, MRL, Merck & Co., Inc., Kenilworth, New Jersey 07033 United States
| | - Fengyuan Yang
- Pharmaceutical Sciences, MRL, Merck & Co., Inc., Kenilworth, New Jersey 07033 United States
| | - Jie Ren
- Pharmaceutical Sciences, MRL, Merck & Co., Inc., Kenilworth, New Jersey 07033 United States
| | - Rubi Burlage
- Pharmaceutical Sciences, MRL, Merck & Co., Inc., Kenilworth, New Jersey 07033 United States
| | - Lei Zhu
- Pharmaceutical Sciences, MRL, Merck & Co., Inc., Kenilworth, New Jersey 07033 United States
| | - Yongchao Su
- Pharmaceutical Sciences, MRL, Merck & Co., Inc., Kenilworth, New Jersey 07033 United States
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31
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Lin C, Smith JS, Liu X, Tse JS, Yang W. Venture into Water's No Man's Land: Structural Transformations of Solid H_{2}O under Rapid Compression and Decompression. PHYSICAL REVIEW LETTERS 2018; 121:225703. [PMID: 30547611 DOI: 10.1103/physrevlett.121.225703] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2018] [Indexed: 06/09/2023]
Abstract
Pressure-induced formation of amorphous ices and the low-density amorphous (LDA) to high-density amorphous (HDA) transition have been believed to occur kinetically below a crossover temperature (T_{c}) above which thermodynamically driven crystalline-crystalline (e.g., ice I_{h}-to-II) transitions and crystallization of HDA and LDA are dominant. Here we show compression-rate-dependent formation of a high-density noncrystalline (HDN) phase transformed from ice I_{c} above T_{c}, bypassing crystalline-crystalline transitions under rapid compression. Rapid decompression above T_{c} transforms HDN to a low-density noncrystalline (LDN) phase which crystallizes spontaneously into ice I_{c}, whereas slow decompression of HDN leads to direct crystallization. The results indicate the formation of HDA and the HDN-to-LDN transition above T_{c} are results of competition between (de)compression rate, energy barrier, and temperature. The crossover temperature is shown to have an exponential relationship with the threshold compression rate. The present results provide important insight into the dynamic property of the phase transitions in addition to the static study.
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Affiliation(s)
- Chuanlong Lin
- Center for High Pressure Science and Technology Advanced Research, Shanghai 201203, China
| | - Jesse S Smith
- HPCAT, Geophysical Laboratory, Carnegie Institution of Washington, Argonne, Illinois 60439, USA
| | - Xuqiang Liu
- Center for High Pressure Science and Technology Advanced Research, Shanghai 201203, China
- Key Laboratory for Anisotropy and Texture of Materials, School of Material Science and Engineering, Northeastern University, Shenyang 110819, China
| | - John S Tse
- Center for High Pressure Science and Technology Advanced Research, Shanghai 201203, China
- Department of Physics and Engineering Physics, University of Saskatchewan, Saskatoon, S7N 5E2 Canada
| | - Wenge Yang
- Center for High Pressure Science and Technology Advanced Research, Shanghai 201203, China
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32
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Rodgers JM, Hemley RJ, Ichiye T. Quasiharmonic analysis of protein energy landscapes from pressure-temperature molecular dynamics simulations. J Chem Phys 2018; 147:125103. [PMID: 28964004 DOI: 10.1063/1.5003823] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Positional fluctuations of an atom in a protein can be described as motion in an effective local energy minimum created by the surrounding protein atoms. The dependence of atomic fluctuations on both temperature (T) and pressure (P) has been used to probe the nature of these minima, which are generally described as harmonic in experiments such as x-ray crystallography and neutron scattering. Here, a quasiharmonic analysis method is presented in which the P-T dependence of atomic fluctuations is in terms of an intrinsic isobaric thermal expansivity αP and an intrinsic isothermal compressibility κT. The method is tested on previously reported mean-square displacements from P-T molecular dynamics simulations of lysozyme, which were interpreted to have a pressure-independent dynamical transition Tg near 200 K and a change in the pressure dependence near 480 MPa. Our quasiharmonic analysis of the same data shows that the P-T dependence can be described in terms of αP and κT where below Tg, the temperature dependence is frozen at the Tg value. In addition, the purported transition at 480 MPa is reinterpreted as a consequence of the pressure dependence of Tg and the quasiharmonic frequencies. The former also indicates that barrier heights between substates are pressure dependent in these data. Furthermore, the insights gained from this quasiharmonic analysis, which was of the energy landscape near the native state of a protein, suggest that similar analyses of other simulations may be useful in understanding such phenomena as pressure-induced protein unfolding.
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Affiliation(s)
- Jocelyn M Rodgers
- Department of Chemistry, Georgetown University, Washington, DC 20057, USA
| | - Russell J Hemley
- Department of Civil and Environmental Engineering, The George Washington University, Washington, DC 20052, USA
| | - Toshiko Ichiye
- Department of Chemistry, Georgetown University, Washington, DC 20057, USA
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33
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Salke NP, Rao R, Achary SN, Nayak C, Garg AB, Krishna PSR, Shinde AB, Jha SN, Bhattacharyya D, Jagannath, Tyagi AK. High Pressure Phases and Amorphization of a Negative Thermal Expansion Compound TaVO 5. Inorg Chem 2018; 57:6973-6980. [PMID: 29877695 DOI: 10.1021/acs.inorgchem.8b00590] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Negative thermal expansion material TaVO5 is recently reported to have pressure induced structural phase transition and irreversible amorphization at 0.2 and above 8 GPa, respectively. Here, we have investigated the high pressure phase of TaVO5 using in situ neutron diffraction studies. The first high pressure phase is identified to be monoclinic P21/ c phase, same as the low temperature phase of TaVO5. On heating, amorphous TaVO5 transformed to a new crystalline phase, which showed signatures of higher coordination of vanadium indicating pressure induced amorphization (PIA). PIA observed in TaVO5 might be due to the kinetic hindrance of pressure induced decomposition (PID) into a compound with higher coordination of vanadium. Mechanism of PIA observed in TaVO5 is investigated by carrying out ex situ Raman, XRD, XPS, and XAS measurements. We have also proposed a pressure-temperature phase diagram of TaVO5 qualitatively delineating the phase boundaries between the ambient orthorhombic, monoclinic, and amorphous phases.
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34
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Liu X, Jia R, Zhang D, Yuan C, Shao C, Hong S. Pressure-jump induced rapid solidification of melt: a method of preparing amorphous materials. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2018; 30:154001. [PMID: 29504945 DOI: 10.1088/1361-648x/aab40b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
By using a self-designed pressure-jump apparatus, we investigated the melt solidification behavior in rapid compression process for several kinds of materials, such as elementary sulfur, polymer polyether-ether-ketone (PEEK) and poly-ethylene-terephthalate, alloy La68Al10Cu20Co2 and Nd60Cu20Ni10Al10. Experimental results clearly show that their melts could be solidified to be amorphous states through the rapid compression process. Bulk amorphous PEEK with 24 mm in diameter and 12 mm in height was prepared, which exceeds the size obtained by melt quenching method. The bulk amorphous sulfur thus obtained exhibited extraordinarily high thermal stability, and an abnormal exothermic transition to liquid sulfur was observed at around 396 K for the first time. Furthermore, it is suggested that the glass transition pressure and critical compression rate exist to form the amorphous phase. This approach of rapid compression is very attractive not only because it is a new technique of make bulk amorphous materials, but also because novel properties are expected in the amorphous materials solidified by the pressure-jump within milliseconds or microseconds.
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Affiliation(s)
- Xiuru Liu
- School of Physical Science and Technology, Key Laboratory of Advanced Technologies of Materials, Ministry of Education of China, Southwest Jiaotong University, Chengdu 610031, People's Republic of China
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35
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Izvekov S, Weingarten NS, Byrd EFC. Effect of a core-softened O–O interatomic interaction on the shock compression of fused silica. J Chem Phys 2018. [DOI: 10.1063/1.5017586] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Affiliation(s)
- Sergei Izvekov
- Weapons and Materials Research Directorate, U.S. Army Research Laboratory, Aberdeen Proving Ground, Aberdeen, Maryland 21005, USA
| | - N. Scott Weingarten
- Weapons and Materials Research Directorate, U.S. Army Research Laboratory, Aberdeen Proving Ground, Aberdeen, Maryland 21005, USA
| | - Edward F. C. Byrd
- Weapons and Materials Research Directorate, U.S. Army Research Laboratory, Aberdeen Proving Ground, Aberdeen, Maryland 21005, USA
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36
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Asscher Y, Dal Sasso G, Nodari L, Angelini I, Boffa Ballaran T, Artioli G. Differentiating between long and short range disorder in infra-red spectra: on the meaning of "crystallinity" in silica. Phys Chem Chem Phys 2018; 19:21783-21790. [PMID: 28783192 DOI: 10.1039/c7cp03446f] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Local atomic disorder and crystallinity are structural properties that influence greatly the resulting chemical and mechanical properties of inorganic solids, and are used as indicators for different pathways of material formation. Here, these structural properties are assessed in the crystals of quartz based on particle-size-related scattering processes in transmission infra-red spectroscopy. Independent determinations of particle size distributions in the range 2-100 μm of a single crystal of quartz and defective quartz with highly anisotropic micro-crystallites show that particle sizes below the employed wavelength (approx 10 μm) exhibit asymmetric narrowing of absorption peak widths, due to scattering processes that depend on the intra-particle structural defects and long range crystallinity. In particular, we observe that the 1079 cm-1 peak could be used to assess crystallinity, because it shows an asymmetric peak shape shift toward a higher wavelength, depending on the crystallite size. We observe that the 694 cm-1 peak could be used to assess local atomic disorder as it does not show scattering and peak shape changes when absorption effects dominate, below 2 μm. We propose coupling particle size assessments with infra-red peak shape analysis as a method to characterize crystallinity and short range order for studying recrystallization in natural silica, as well as defectivity in many different types of silicas used for industrial and technological applications.
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Affiliation(s)
- Yotam Asscher
- Department of Geosciences, University of Padova, Padova 35131, Italy.
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37
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Wang Y, Zhang H, Yang X, Jiang S, Goncharov AF. Kinetic boundaries and phase transformations of iceiat high pressure. J Chem Phys 2018; 148:044508. [DOI: 10.1063/1.5017507] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Affiliation(s)
- Yu Wang
- Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, Anhui, People’s Republic of China
- University of Science and Technology of China, Hefei 230026, Anhui, People’s Republic of China
| | - Huichao Zhang
- Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, Anhui, People’s Republic of China
- University of Science and Technology of China, Hefei 230026, Anhui, People’s Republic of China
| | - Xue Yang
- Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, Anhui, People’s Republic of China
| | - Shuqing Jiang
- Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, Anhui, People’s Republic of China
| | - Alexander F. Goncharov
- Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, Anhui, People’s Republic of China
- University of Science and Technology of China, Hefei 230026, Anhui, People’s Republic of China
- Geophysical Laboratory, Carnegie Institution of Washington, 5251 Broad Branch Road NW, Washington, DC 20015, USA
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38
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Abstract
We have used ab initio molecular dynamics and density-functional theory (DFT) calculations at the B3LYP/6-31G** level of theory to evaluate the energy and localisation of excess electrons at a number of representative interfaces of polymer nanocomposites.
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Affiliation(s)
- Fernan Saiz
- Department of Chemistry
- Imperial College
- London
- UK
| | - Nick Quirke
- Department of Chemistry
- Imperial College
- London
- UK
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39
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Abstract
High-pressure single-crystal X-ray diffraction method with precise control of hydrostatic conditions, typically with helium or neon as the pressure-transmitting medium, has significantly changed our view on what happens with low-density silica phases under pressure. Coesite is a prototype material for pressure-induced amorphization. However, it was found to transform into a high-pressure octahedral (HPO) phase, or coesite-II and coesite-III. Given that the pressure is believed to be hydrostatic in two recent experiments, the different transformation pathways are striking. Based on molecular dynamic simulations with an ab initio parameterized potential, we reproduced all of the above experiments in three transformation pathways, including the one leading to an HPO phase. This octahedral phase has an oxygen hcp sublattice featuring 2 × 2 zigzag octahedral edge-sharing chains, however with some broken points (i.e., point defects). It transforms into α-PbO2 phase when it is relaxed under further compression. We show that the HPO phase forms through a continuous rearrangement of the oxygen sublattice toward hcp arrangement. The high-pressure amorphous phases can be described by an fcc and hcp sublattice mixture.
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40
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Gleason AE, Bolme CA, Lee HJ, Nagler B, Galtier E, Kraus RG, Sandberg R, Yang W, Langenhorst F, Mao WL. Time-resolved diffraction of shock-released SiO 2 and diaplectic glass formation. Nat Commun 2017; 8:1481. [PMID: 29133910 PMCID: PMC5684137 DOI: 10.1038/s41467-017-01791-y] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2017] [Accepted: 10/13/2017] [Indexed: 11/18/2022] Open
Abstract
Understanding how rock-forming minerals transform under shock loading is critical for modeling collisions between planetary bodies, interpreting the significance of shock features in minerals and for using them as diagnostic indicators of impact conditions, such as shock pressure. To date, our understanding of the formation processes experienced by shocked materials is based exclusively on ex situ analyses of recovered samples. Formation mechanisms and origins of commonly observed mesoscale material features, such as diaplectic (i.e., shocked) glass, remain therefore controversial and unresolvable. Here we show in situ pump-probe X-ray diffraction measurements on fused silica crystallizing to stishovite on shock compression and then converting to an amorphous phase on shock release in only 2.4 ns from 33.6 GPa. Recovered glass fragments suggest permanent densification. These observations of real-time diaplectic glass formation attest that it is a back-transformation product of stishovite with implications for revising traditional shock metamorphism stages. Our understanding of shock metamorphism and thus the collision of planetary bodies is limited by a dependence on ex situ analyses. Here, the authors perform in situ analysis on shocked-produced densified glass and show that estimates of impactor size based on traditional techniques are likely inflated.
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Affiliation(s)
- A E Gleason
- Shock and Detonation Physics, Los Alamos National Laboratory, P.O. Box 1663, Los Alamos, NM, 87545, USA. .,Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, 2575 Sand Hill Rd., Menlo Park, CA, 94025, USA.
| | - C A Bolme
- Shock and Detonation Physics, Los Alamos National Laboratory, P.O. Box 1663, Los Alamos, NM, 87545, USA
| | - H J Lee
- Linac Coherent Light Source, SLAC National Accelerator Laboratory, 2575 Sand Hill Rd., Menlo Park, CA, 94025, USA
| | - B Nagler
- Linac Coherent Light Source, SLAC National Accelerator Laboratory, 2575 Sand Hill Rd., Menlo Park, CA, 94025, USA
| | - E Galtier
- Linac Coherent Light Source, SLAC National Accelerator Laboratory, 2575 Sand Hill Rd., Menlo Park, CA, 94025, USA
| | - R G Kraus
- Shock Physics, Lawrence Livermore National Laboratory, 7000 East Ave., Livermore, CA, 94550, USA
| | - R Sandberg
- Center for Integrated Nanotechnologies, Los Alamos National Laboratory, P.O. Box 1663, Los Alamos, NM, 87545, USA
| | - W Yang
- Center for High Pressure Science and Technology Advanced Research, Shanghai, 201203, China.,HPSynC, Carnegie Institution of Washington, Argonne, IL, 60439, USA
| | - F Langenhorst
- Institut für Geowissenschaften, Friedrich-Schiller-Universität Jena, D-07745, Jena, Germany
| | - W L Mao
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, 2575 Sand Hill Rd., Menlo Park, CA, 94025, USA.,Geological Sciences, Stanford University, 367 Panama St., Stanford, CA, 94305, USA
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41
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Yong X, Tse JS, English NJ. optPBE-vdW density functional theory study of liquid water and pressure-induced structural evolution in ice Ih. CAN J CHEM 2017. [DOI: 10.1139/cjc-2017-0201] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The accuracy of several local and non-local van der Waals (vdW) corrected exchange correlation functionals on the description of the effect of pressure on ice has been investigated. In a preliminary survey, the non-local vdW correction used in conjunction with the optPBE functional was shown to provide the best overall agreement on the structural parameters of ice Ih with experiments. More importantly, this combination reproduced correctly the recently observed crystal → crystal transformation in ice Ih at 80 K prior to amorphisation. The predicted transition pressure of 1.9 GPa is somewhat higher, showing that the current generation of vdW functionals are still not sufficiently accurate for the ice system. The existence of an intermediate crystalline state with a shear-hexagonal structure confirms the earlier prediction that the collapse of crystalline structure under compression originates from the softening of phonon modes in ice Ih’s basal plane.
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Affiliation(s)
- Xue Yong
- Department of Physics and Engineering Physics, University of Saskatchewan, Saskatoon, SK S7N 5E2, Canada
| | - John S. Tse
- Department of Physics and Engineering Physics, University of Saskatchewan, Saskatoon, SK S7N 5E2, Canada
| | - Niall J. English
- School of Chemical and Bioprocess Engineering, University College Dublin, Belfield, Dublin 4, Ireland
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42
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Lin C, Yong X, Tse JS, Smith JS, Sinogeikin SV, Kenney-Benson C, Shen G. Kinetically Controlled Two-Step Amorphization and Amorphous-Amorphous Transition in Ice. PHYSICAL REVIEW LETTERS 2017; 119:135701. [PMID: 29341714 DOI: 10.1103/physrevlett.119.135701] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2017] [Indexed: 05/09/2023]
Abstract
We report the results of in situ structural characterization of the amorphization of crystalline ice Ih under compression and the relaxation of high-density amorphous (HDA) ice under decompression at temperatures between 96 and 160 K by synchrotron x-ray diffraction. The results show that ice Ih transforms to an intermediate crystalline phase at 100 K prior to complete amorphization, which is supported by molecular dynamics calculations. The phase transition pathways show clear temperature dependence: direct amorphization without an intermediate phase is observed at 133 K, while at 145 K a direct Ih-to-IX transformation is observed; decompression of HDA shows a transition to low-density amorphous ice at 96 K and ∼1 Pa, to ice Ic at 135 K and to ice IX at 145 K. These observations show that the amorphization of compressed ice Ih and the recrystallization of decompressed HDA are strongly dependent on temperature and controlled by kinetic barriers. Pressure-induced amorphous ice is an intermediate state in the phase transition from the connected H-bond water network in low pressure ices to the independent and interpenetrating H-bond network of high-pressure ices.
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Affiliation(s)
- Chuanlong Lin
- HPCAT, Geophysical Laboratory, Carnegie Institution of Washington, Argonne, Illinois 60439, USA
| | - Xue Yong
- Department of Physics and Engineering Physics, University of Saskatchewan, Saskatoon, S7N 5E2 Canada
| | - John S Tse
- Department of Physics and Engineering Physics, University of Saskatchewan, Saskatoon, S7N 5E2 Canada
| | - Jesse S Smith
- HPCAT, Geophysical Laboratory, Carnegie Institution of Washington, Argonne, Illinois 60439, USA
| | - Stanislav V Sinogeikin
- HPCAT, Geophysical Laboratory, Carnegie Institution of Washington, Argonne, Illinois 60439, USA
| | - Curtis Kenney-Benson
- HPCAT, Geophysical Laboratory, Carnegie Institution of Washington, Argonne, Illinois 60439, USA
| | - Guoyin Shen
- HPCAT, Geophysical Laboratory, Carnegie Institution of Washington, Argonne, Illinois 60439, USA
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43
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Prescher C, Prakapenka VB, Stefanski J, Jahn S, Skinner LB, Wang Y. Beyond sixfold coordinated Si in SiO 2 glass at ultrahigh pressures. Proc Natl Acad Sci U S A 2017; 114:10041-10046. [PMID: 28874582 PMCID: PMC5617297 DOI: 10.1073/pnas.1708882114] [Citation(s) in RCA: 68] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
We investigated the structure of SiO2 glass up to 172 GPa using high-energy X-ray diffraction. The combination of a multichannel collimator with diamond anvil cells enabled the measurement of structural changes in silica glass with total X-ray diffraction to previously unachievable pressures. We show that SiO2 first undergoes a change in Si-O coordination number from fourfold to sixfold between 15 and 50 GPa, in agreement with previous investigations. Above 50 GPa, the estimated coordination number continuously increases from 6 to 6.8 at 172 GPa. Si-O bond length shows first an increase due to the fourfold to sixfold coordination change and then a smaller linear decrease up to 172 GPa. We reconcile the changes in relation to the oxygen-packing fraction, showing that oxygen packing decreases at ultrahigh pressures to accommodate the higher than sixfold Si-O coordination. These results give experimental insight into the structural changes of silicate glasses as analogue materials for silicate melts at ultrahigh pressures.
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Affiliation(s)
- Clemens Prescher
- Institut für Geologie und Mineralogie, Universität zu Köln, 50674 Köln, Germany;
- Center for Advanced Radiation Sources, University of Chicago, Chicago, IL 60637
| | - Vitali B Prakapenka
- Center for Advanced Radiation Sources, University of Chicago, Chicago, IL 60637
| | - Johannes Stefanski
- Institut für Geologie und Mineralogie, Universität zu Köln, 50674 Köln, Germany
| | - Sandro Jahn
- Institut für Geologie und Mineralogie, Universität zu Köln, 50674 Köln, Germany
| | - Lawrie B Skinner
- X-Ray Science Division, Advanced Photon Source, Argonne National Laboratory, Argonne, IL 60439
- Mineral Physics Institute, Stony Brook University, Stony Brook, NY 11794-2100
| | - Yanbin Wang
- Center for Advanced Radiation Sources, University of Chicago, Chicago, IL 60637
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44
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Zhao S, Kad B, Wehrenberg CE, Remington BA, Hahn EN, More KL, Meyers MA. Generating gradient germanium nanostructures by shock-induced amorphization and crystallization. Proc Natl Acad Sci U S A 2017; 114:9791-9796. [PMID: 28847926 PMCID: PMC5604032 DOI: 10.1073/pnas.1708853114] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Gradient nanostructures are attracting considerable interest due to their potential to obtain superior structural and functional properties of materials. Applying powerful laser-driven shocks (stresses of up to one-third million atmospheres, or 33 gigapascals) to germanium, we report here a complex gradient nanostructure consisting of, near the surface, nanocrystals with high density of nanotwins. Beyond there, the structure exhibits arrays of amorphous bands which are preceded by planar defects such as stacking faults generated by partial dislocations. At a lower shock stress, the surface region of the recovered target is completely amorphous. We propose that germanium undergoes amorphization above a threshold stress and that the deformation-generated heat leads to nanocrystallization. These experiments are corroborated by molecular dynamics simulations which show that supersonic partial dislocation bursts play a role in triggering the crystalline-to-amorphous transition.
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Affiliation(s)
- Shiteng Zhao
- Materials Science and Engineering Program, University of California, San Diego, La Jolla, CA 92093
| | - Bimal Kad
- Department of Structural Engineering, University of California, San Diego, La Jolla, CA 92093
| | | | | | - Eric N Hahn
- Materials Science and Engineering Program, University of California, San Diego, La Jolla, CA 92093
| | | | - Marc A Meyers
- Materials Science and Engineering Program, University of California, San Diego, La Jolla, CA 92093;
- Department of Mechanical and Aerospace Engineering, University of California, San Deigo, La Jolla, CA 92093
- Department of Nanoengineering, University of California, San Deigo, La Jolla, CA 92093
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45
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Chiba A, Inui M, Kajihara Y, Fuchizaki K, Akiyama R. Isotactic poly(4-methyl-1-pentene) melt as a porous liquid: Reduction of compressibility due to penetration of pressure medium. J Chem Phys 2017; 146:194503. [PMID: 28527460 DOI: 10.1063/1.4983508] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
A pressure-induced structural change of a polymer isotactic poly(4-methyl-1-pentene) (P4MP1) in the melted state at 270 °C has been investigated by high-pressure in situ x-ray diffraction, where high pressures up to 1.8 kbar were applied using helium gas. The first sharp diffraction peak (FSDP) position of the melt shows a less pressure dependence than that of the normal compression using a solid pressure transmitting medium. The contraction using helium gas was about 10% at 2 kbar, smaller than about 20% at the same pressure using a solid medium. The result indicates that helium entered the interstitial space between the main chains. The helium/monomer molar ratio was estimated to be 0.3 at 2 kbar from the FSDP positions. These results suggest that the compressibility of the P4MP1 melt can be largely dependent on the pressure transmitting media. As the pore size is reversibly and continuously controllable by compression, we suggest that the P4MP1 melt can be an ideal porous liquid for investigating a novel mechanical response of the pores in a non-crystalline substance.
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Affiliation(s)
- Ayano Chiba
- Department of Physics, Keio University, Yokohama 223-8522, Japan
| | - Masanori Inui
- Graduate School of Integrated Arts and Sciences, Hiroshima University, Higashi-Hiroshima, Hiroshima 739-8521, Japan
| | - Yukio Kajihara
- Graduate School of Integrated Arts and Sciences, Hiroshima University, Higashi-Hiroshima, Hiroshima 739-8521, Japan
| | | | - Ryo Akiyama
- Department of Chemistry, Kyushu University, Fukuoka 819-0395, Japan
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46
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Misawa M, Ryuo E, Yoshida K, Kalia RK, Nakano A, Nishiyama N, Shimojo F, Vashishta P, Wakai F. Picosecond amorphization of SiO 2 stishovite under tension. SCIENCE ADVANCES 2017; 3:e1602339. [PMID: 28508056 PMCID: PMC5429036 DOI: 10.1126/sciadv.1602339] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/22/2016] [Accepted: 03/13/2017] [Indexed: 06/07/2023]
Abstract
It is extremely difficult to realize two conflicting properties-high hardness and toughness-in one material. Nano-polycrystalline stishovite, recently synthesized from Earth-abundant silica glass, proved to be a super-hard, ultra-tough material, which could provide sustainable supply of high-performance ceramics. Our quantum molecular dynamics simulations show that stishovite amorphizes rapidly on the order of picosecond under tension in front of a crack tip. We find a displacive amorphization mechanism that only involves short-distance collective motions of atoms, thereby facilitating the rapid transformation. The two-step amorphization pathway involves an intermediate state akin to experimentally suggested "high-density glass polymorphs" before eventually transforming to normal glass. The rapid amorphization can catch up with, screen, and self-heal a fast-moving crack. This new concept of fast amorphization toughening likely operates in other pressure-synthesized hard solids.
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Affiliation(s)
- Masaaki Misawa
- Collaboratory for Advanced Computing and Simulations, Department of Physics and Astronomy, Department of Computer Science, Department of Chemical Engineering and Materials Science, and Department of Biological Sciences, University of Southern California, Los Angeles, CA 90089–0242, USA
- Department of Physics, Kumamoto University, Kumamoto 860-8555, Japan
| | - Emina Ryuo
- Department of Physics, Kumamoto University, Kumamoto 860-8555, Japan
| | - Kimiko Yoshida
- Materials and Structures Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta, Midori, Yokohama 226-8503, Japan
| | - Rajiv K. Kalia
- Collaboratory for Advanced Computing and Simulations, Department of Physics and Astronomy, Department of Computer Science, Department of Chemical Engineering and Materials Science, and Department of Biological Sciences, University of Southern California, Los Angeles, CA 90089–0242, USA
| | - Aiichiro Nakano
- Collaboratory for Advanced Computing and Simulations, Department of Physics and Astronomy, Department of Computer Science, Department of Chemical Engineering and Materials Science, and Department of Biological Sciences, University of Southern California, Los Angeles, CA 90089–0242, USA
| | | | - Fuyuki Shimojo
- Department of Physics, Kumamoto University, Kumamoto 860-8555, Japan
| | - Priya Vashishta
- Collaboratory for Advanced Computing and Simulations, Department of Physics and Astronomy, Department of Computer Science, Department of Chemical Engineering and Materials Science, and Department of Biological Sciences, University of Southern California, Los Angeles, CA 90089–0242, USA
| | - Fumihiro Wakai
- Materials and Structures Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta, Midori, Yokohama 226-8503, Japan
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47
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Shephard JJ, Ling S, Sosso GC, Michaelides A, Slater B, Salzmann CG. Is High-Density Amorphous Ice Simply a "Derailed" State along the Ice I to Ice IV Pathway? J Phys Chem Lett 2017; 8:1645-1650. [PMID: 28323429 DOI: 10.1021/acs.jpclett.7b00492] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
The structural nature of high-density amorphous ice (HDA), which forms through low-temperature pressure-induced amorphization of the "ordinary" ice I, is heavily debated. Clarifying this question is important for understanding not only the complex condensed states of H2O but also in the wider context of pressure-induced amorphization processes, which are encountered across the entire materials spectrum. We first show that ammonium fluoride (NH4F), which has a similar hydrogen-bonded network to ice I, also undergoes a pressure collapse upon compression at 77 K. However, the product material is not amorphous but NH4F II, a high-pressure phase isostructural with ice IV. This collapse can be rationalized in terms of a highly effective mechanism. In the case of ice I, the orientational disorder of the water molecules leads to a deviation from this mechanism, and we therefore classify HDA as a "derailed" state along the ice I to ice IV pathway.
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Affiliation(s)
- Jacob J Shephard
- Department of Chemistry, University College London , 20 Gordon Street, London WC1H 0AJ, United Kingdom
| | - Sanliang Ling
- Department of Chemistry, University College London , 20 Gordon Street, London WC1H 0AJ, United Kingdom
| | - Gabriele C Sosso
- Thomas Young Centre, Department of Physics and Astronomy, and London Centre for Nanotechnology, University College London , Gower Street, London WC1E 6BT, United Kingdom
| | - Angelos Michaelides
- Thomas Young Centre, Department of Physics and Astronomy, and London Centre for Nanotechnology, University College London , Gower Street, London WC1E 6BT, United Kingdom
| | - Ben Slater
- Department of Chemistry, University College London , 20 Gordon Street, London WC1H 0AJ, United Kingdom
| | - Christoph G Salzmann
- Department of Chemistry, University College London , 20 Gordon Street, London WC1H 0AJ, United Kingdom
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48
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Modak P, Verma AK. Prediction of a novel 10-fold gold coordinated structure in AuIn 2 above 10 GPa. Phys Chem Chem Phys 2017; 19:3532-3537. [PMID: 28111659 DOI: 10.1039/c6cp07805b] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A 10-fold gold coordinated tetragonal structure is predicted for AuIn2 above 10 GPa by employing the first-principles crystal structure search method. This structure remains the lowest enthalpy structure up to the highest pressure of this study. Detailed electronic structure analysis is carried out to figure out the underlying factors responsible for the transition. Pressure induced electronic topological transition is found to be one of the main factors behind this transition. Phonon calculations show the softening of TA mode phonons and destruction of the giant Kohn anomaly in close proximity to the transition. Bader charge analysis shows the charge transfer increase from the In to Au atom under pressure. So this study has solved a long-standing structural puzzle of the AuIn2 above 10 GPa. This study is also expected to play an important role in our understanding of the pressure induced metallization of geophysically relevant oxides such as SiO2 and TiO2.
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Affiliation(s)
- P Modak
- High Pressure and Synchrotron Radiation Physics Division, Bhabha Atomic Research Centre, Trombay, Mumbai - 400085, India.
| | - Ashok K Verma
- High Pressure and Synchrotron Radiation Physics Division, Bhabha Atomic Research Centre, Trombay, Mumbai - 400085, India.
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49
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Zhang XJ, Shang C, Liu ZP. Pressure-induced silica quartz amorphization studied by iterative stochastic surface walking reaction sampling. Phys Chem Chem Phys 2017; 19:4725-4733. [DOI: 10.1039/c6cp06895b] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The origin of the pressure-induced amorphization of SiO2 is resolved from theory based on pathways on the global potential energy surface.
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Affiliation(s)
- Xiao-Jie Zhang
- Collaborative Innovation Center of Chemistry for Energy Material
- Key Laboratory of Computational Physical Science (Ministry of Education)
- Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials
- Department of Chemistry
- Fudan University
| | - Cheng Shang
- Collaborative Innovation Center of Chemistry for Energy Material
- Key Laboratory of Computational Physical Science (Ministry of Education)
- Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials
- Department of Chemistry
- Fudan University
| | - Zhi-Pan Liu
- Collaborative Innovation Center of Chemistry for Energy Material
- Key Laboratory of Computational Physical Science (Ministry of Education)
- Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials
- Department of Chemistry
- Fudan University
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50
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Sahle CJ, Rosa AD, Rossi M, Cerantola V, Spiekermann G, Petitgirard S, Jacobs J, Huotari S, Moretti Sala M, Mirone A. Direct tomography imaging for inelastic X-ray scattering experiments at high pressure. JOURNAL OF SYNCHROTRON RADIATION 2017; 24:269-275. [PMID: 28009566 DOI: 10.1107/s1600577516017100] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2016] [Accepted: 10/24/2016] [Indexed: 06/06/2023]
Abstract
A method to separate the non-resonant inelastic X-ray scattering signal of a micro-metric sample contained inside a diamond anvil cell (DAC) from the signal originating from the high-pressure sample environment is described. Especially for high-pressure experiments, the parasitic signal originating from the diamond anvils, the gasket and/or the pressure medium can easily obscure the sample signal or even render the experiment impossible. Another severe complication for high-pressure non-resonant inelastic X-ray measurements, such as X-ray Raman scattering spectroscopy, can be the proximity of the desired sample edge energy to an absorption edge energy of elements constituting the DAC. It is shown that recording the scattered signal in a spatially resolved manner allows these problems to be overcome by separating the sample signal from the spurious scattering of the DAC without constraints on the solid angle of detection. Furthermore, simple machine learning algorithms facilitate finding the corresponding detector pixels that record the sample signal. The outlined experimental technique and data analysis approach are demonstrated by presenting spectra of the Si L2,3-edge and O K-edge of compressed α-quartz. The spectra are of unprecedented quality and both the O K-edge and the Si L2,3-edge clearly show the existence of a pressure-induced phase transition between 10 and 24 GPa.
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Affiliation(s)
- Ch J Sahle
- European Synchrotron Radiation Facility, 71 Avenue des Martyrs, 38000 Grenoble, France
| | - A D Rosa
- European Synchrotron Radiation Facility, 71 Avenue des Martyrs, 38000 Grenoble, France
| | - M Rossi
- European Synchrotron Radiation Facility, 71 Avenue des Martyrs, 38000 Grenoble, France
| | - V Cerantola
- European Synchrotron Radiation Facility, 71 Avenue des Martyrs, 38000 Grenoble, France
| | - G Spiekermann
- Institute of Earth and Environmental Science, Universität Potsdam, Potsdam, Germany
| | - S Petitgirard
- Bayerisches Geoinstitut, University of Bayreuth, Bayreuth, Germany
| | - J Jacobs
- European Synchrotron Radiation Facility, 71 Avenue des Martyrs, 38000 Grenoble, France
| | - S Huotari
- Department of Physics, POB 64, FI-00014, University of Helsinki, Helsinki, Finland
| | - M Moretti Sala
- European Synchrotron Radiation Facility, 71 Avenue des Martyrs, 38000 Grenoble, France
| | - A Mirone
- European Synchrotron Radiation Facility, 71 Avenue des Martyrs, 38000 Grenoble, France
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