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Ma S, Hester BR, Lloyd AJ, dos Santos AM, Molaison JJ, Wilkinson AP. Synthesis and Properties of the Helium Clathrate and Defect Perovskite [He 2-x □ x ][CaNb]F 6. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2024; 128:11006-11013. [PMID: 38983596 PMCID: PMC11229063 DOI: 10.1021/acs.jpcc.4c02174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/02/2024] [Revised: 06/04/2024] [Accepted: 06/14/2024] [Indexed: 07/11/2024]
Abstract
The defect double perovskite [He2-x □ x ][CaNb]F6, with helium on its A-site, can be prepared by the insertion of helium into ReO3-type CaNbF6 at high pressure. Upon cooling from 300 to 100 K under 0.4 GPa helium, ∼60% of the A-sites become occupied. Helium uptake was quantified by both neutron powder diffraction and gas insertion and release measurements. After the conversion of gauge pressure to fugacity, the uptake of helium by CaNbF6 can be described by a Langmuir isotherm. The enthalpy of absorption for helium in [He2-x □ x ][CaNb]F6 is estimated to be ∼+3(1) kJ mol-1, implying that its formation is entropically favored. Helium is able to diffuse through the material on a time scale of minutes at temperatures down to ∼150 K but is trapped at 100 K and below. The insertion of helium into CaNbF6 reduces the magnitude of its negative thermal expansion, increases the bulk modulus, and modifies its phase behavior. On compressing pristine CaNbF6, at 50 and 100 K, a cubic (Fm3̅m) to rhombohedral (R3̅) phase transition was observed at <0.20 GPa. However, a helium-containing sample remained cubic at 0.4 GPa and 50 K. CaNbF6, compressed in helium at room temperature, remained cubic to >3.7 GPa, the limit of our X-ray diffraction measurements, in contrast to prior reports that upon compression in a nonpenetrating medium, a phase transition is detected at ∼0.4 GPa.
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Affiliation(s)
- Shangye Ma
- School
of Chemistry and Biochemistry, Georgia Institute
of Technology, Atlanta, Georgia 30332-0400, United States
| | - Brett R. Hester
- School
of Chemistry and Biochemistry, Georgia Institute
of Technology, Atlanta, Georgia 30332-0400, United States
| | - Anthony J. Lloyd
- School
of Chemistry and Biochemistry, Georgia Institute
of Technology, Atlanta, Georgia 30332-0400, United States
| | - Antonio M. dos Santos
- Neutron
Scattering Division, Oak Ridge National
Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Jamie J. Molaison
- Neutron
Scattering Division, Oak Ridge National
Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Angus P. Wilkinson
- School
of Chemistry and Biochemistry, Georgia Institute
of Technology, Atlanta, Georgia 30332-0400, United States
- School
of Materials Science and Engineering, Georgia
Institute of Technology, Atlanta, Georgia 30332-0245, United States
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Kukhtetskiy SV, Fomenko EV, Anshits AG. Anomalous Diffusion of Helium and Neon in Low-Density Silica Glass. MEMBRANES 2023; 13:754. [PMID: 37755176 PMCID: PMC10534533 DOI: 10.3390/membranes13090754] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2023] [Revised: 08/15/2023] [Accepted: 08/23/2023] [Indexed: 09/28/2023]
Abstract
The diffusion properties of low-density non-porous silica glasses (expanded silica glasses) were researched with the aim of searching for the molecular structure of membrane materials intended for the effective separation of helium-neon gas mixtures. It has been shown on a large number (84) of computer models of such glasses that there are molecular structures of silica in which various helium and neon diffusion mechanisms are simultaneously implemented: superdiffusion for helium and subdiffusion for neon. This makes it possible to significantly (by 3-5 orders of magnitude) increase the helium permeability of such glasses at room temperature and maintain a high selectivity for the separation of helium and neon (at the level of 104-105) at the same time.
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Affiliation(s)
- Sergey V Kukhtetskiy
- Federal Research Center "Krasnoyarsk Science Center SB RAS", Institute of Chemistry and Chemical Technology SB RAS, Akademgorodok 50/24, Krasnoyarsk 660036, Russia
| | - Elena V Fomenko
- Federal Research Center "Krasnoyarsk Science Center SB RAS", Institute of Chemistry and Chemical Technology SB RAS, Akademgorodok 50/24, Krasnoyarsk 660036, Russia
| | - Alexander G Anshits
- Federal Research Center "Krasnoyarsk Science Center SB RAS", Institute of Chemistry and Chemical Technology SB RAS, Akademgorodok 50/24, Krasnoyarsk 660036, Russia
- Department of Chemistry, Siberian Federal University, Svobodnyi pr. 79, Krasnoyarsk 660041, Russia
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3
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Mijit E, Elias F S Rodrigues J, Tchoudinov G, Paparoni F, Shinmei T, Irifune T, Mathon O, Dorothea Rosa A, Di Cicco A. EXAFS investigations on the pressure induced local structural changes of GeSe 2glass under different hydrostatic conditions. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2023; 35:264001. [PMID: 36990102 DOI: 10.1088/1361-648x/acc8b1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/03/2023] [Accepted: 03/28/2023] [Indexed: 06/19/2023]
Abstract
Pressure-induced transformations in glassy GeSe2have been studied using the x-ray absorption spectroscopy. Experiments have been carried out at the scanning-energy beamline BM23 (European Synchrotron Radiation Facility) providing a micrometric x-ray focal spot up to pressures of about 45 GPa in a diamond anvil cell. Both Se and Ge K-edge experiments were performed under different hydrostatic conditions identifying the metallization onsets by accurate determinations of the edge shifts. The semiconductor-metal transition was observed to be completed around 20 GPa when neon was used as a pressure transmitting medium (PTM), while this transition was slightly shifted to lower pressures when no PTM was used. Accurate double-edge extended x-ray absorption fine structure (EXAFS) refinements were carried out using advanced data-analysis methods. EXAFS data-analysis confirmed the trend shown by the edge shifts for this disordered material, showing that the transition from tetrahedral to octahedral coordination for Ge sites is not fully achieved at 45 GPa. Results of present high pressure EXAFS experiments have shown the absence of significant neon incorporation into the glass within the pressure range up to 45 GPa.
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Affiliation(s)
- Emin Mijit
- Physics Division, School of Science and Technology, Università di Camerino, Via Madonna delle Carceri 9, I-62032 Camerino, (MC), Italy
| | - João Elias F S Rodrigues
- European Synchrotron Radiation Facility, 71, Avenue des Martyrs, CS 40220, 38043 Grenoble, Cedex 9, France
| | - Georghii Tchoudinov
- Physics Division, School of Science and Technology, Università di Camerino, Via Madonna delle Carceri 9, I-62032 Camerino, (MC), Italy
| | - Francesco Paparoni
- Physics Division, School of Science and Technology, Università di Camerino, Via Madonna delle Carceri 9, I-62032 Camerino, (MC), Italy
| | - Toru Shinmei
- Geodynamics Research Center, Ehime University, Matsuyama 790-8577, Japan
| | - Tetsuo Irifune
- Geodynamics Research Center, Ehime University, Matsuyama 790-8577, Japan
| | - Olivier Mathon
- European Synchrotron Radiation Facility, 71, Avenue des Martyrs, CS 40220, 38043 Grenoble, Cedex 9, France
| | - Angelika Dorothea Rosa
- European Synchrotron Radiation Facility, 71, Avenue des Martyrs, CS 40220, 38043 Grenoble, Cedex 9, France
| | - Andrea Di Cicco
- Physics Division, School of Science and Technology, Università di Camerino, Via Madonna delle Carceri 9, I-62032 Camerino, (MC), Italy
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4
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Poręba T, Comboni D, Mezouar M, Garbarino G, Hanfland M. Tracking structural phase transitions via single crystal x-ray diffraction at extreme conditions: advantages of extremely brilliant source. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2022; 35:054001. [PMID: 36541495 DOI: 10.1088/1361-648x/aca50b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2022] [Accepted: 11/22/2022] [Indexed: 06/17/2023]
Abstract
Highly brilliant synchrotron source is indispensable to track pressure-induced phenomena in confined crystalline samples in megabar range. In this article, a number of experimental variables affecting the quality high-pressure single-crystal x-ray diffraction data is discussed. An overview of the recent advancements in x-ray diffraction techniques at extreme conditions, in the frame of European Synchrotron Radiation Facility (ESRF)- Extremely Bright Source (EBS), is presented. Particularly, ID15b and ID27 beamlines have profited from the source upgrade, allowing for measurements of a few-micron crystals in megabar range. In case of ID27, a whole new beamline has been devised, including installation of double-multilayer mirrors and double crystal monochromator and construction of custom-made experimental stations. Two case studies from ID27 and ID15b are presented. Hypervalent CsI3crystals, studied up to 24 GPa, have shown a series of phase transitions:Pnma → P-3c1→ Pm-3n. First transition leads to formation of orthogonal linear iodine chains made of I3-. Transformation to the cubic phase at around 21.7 GPa leads to equalization of interatomic I-I distances and formation of homoleptic Inm-chains. The second study investigates elastic properties and structure of jadarite, which undergoes isosymmetric phase transition around 16.6 GPa. Despite a few-micron crystal size, twinning and dramatic loss of crystal quality, associated with pressure-induced phase transitions, crystal structures of both compounds have been determined in a straightforward matter, thanks to the recent developments within ESRF-EBS.
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Affiliation(s)
- Tomasz Poręba
- European Synchrotron Radiation Facility, 71 Avenue des Martyrs, 38000 Grenoble, France
| | - Davide Comboni
- European Synchrotron Radiation Facility, 71 Avenue des Martyrs, 38000 Grenoble, France
| | - Mohamed Mezouar
- European Synchrotron Radiation Facility, 71 Avenue des Martyrs, 38000 Grenoble, France
| | - Gaston Garbarino
- European Synchrotron Radiation Facility, 71 Avenue des Martyrs, 38000 Grenoble, France
| | - Michael Hanfland
- European Synchrotron Radiation Facility, 71 Avenue des Martyrs, 38000 Grenoble, France
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Zeng Z, Wen J, Lou H, Zhang X, Yang L, Tan L, Cheng B, Zuo X, Yang W, Mao WL, Mao HK, Zeng Q. Preservation of high-pressure volatiles in nanostructured diamond capsules. Nature 2022; 608:513-517. [PMID: 35978124 DOI: 10.1038/s41586-022-04955-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2021] [Accepted: 06/08/2022] [Indexed: 11/09/2022]
Abstract
High pressure induces dramatic changes and novel phenomena in condensed volatiles1,2 that are usually not preserved after recovery from pressure vessels. Here we report a process that pressurizes volatiles into nanopores of type 1 glassy carbon precursors, converts glassy carbon into nanocrystalline diamond by heating and synthesizes free-standing nanostructured diamond capsules (NDCs) capable of permanently preserving volatiles at high pressures, even after release back to ambient conditions for various vacuum-based diagnostic probes including electron microscopy. As a demonstration, we perform a comprehensive study of a high-pressure argon sample preserved in NDCs. Synchrotron X-ray diffraction and high-resolution transmission electron microscopy show nanometre-sized argon crystals at around 22.0 gigapascals embedded in nanocrystalline diamond, energy-dispersive X‑ray spectroscopy provides quantitative compositional analysis and electron energy-loss spectroscopy details the chemical bonding nature of high-pressure argon. The preserved pressure of the argon sample inside NDCs can be tuned by controlling NDC synthesis pressure. To test the general applicability of the NDC process, we show that high-pressure neon can also be trapped in NDCs and that type 2 glassy carbon can be used as the precursor container material. Further experiments on other volatiles and carbon allotropes open the possibility of bringing high-pressure explorations on a par with mainstream condensed-matter investigations and applications.
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Affiliation(s)
- Zhidan Zeng
- Center for High Pressure Science and Technology Advanced Research, Shanghai, China
| | - Jianguo Wen
- Center for Nanoscale Materials, Argonne National Laboratory, Lemont, IL, USA
| | - Hongbo Lou
- Center for High Pressure Science and Technology Advanced Research, Shanghai, China
| | - Xin Zhang
- Center for High Pressure Science and Technology Advanced Research, Shanghai, China
| | - Liuxiang Yang
- Center for High Pressure Science and Technology Advanced Research, Shanghai, China
| | - Lijie Tan
- Center for High Pressure Science and Technology Advanced Research, Shanghai, China
| | - Benyuan Cheng
- Center for High Pressure Science and Technology Advanced Research, Shanghai, China.,Shanghai Institute of Laser Plasma, Shanghai, China
| | - Xiaobing Zuo
- X-ray Science Division, Argonne National Laboratory, Lemont, IL, USA
| | - Wenge Yang
- Center for High Pressure Science and Technology Advanced Research, Shanghai, China
| | - Wendy L Mao
- Department of Geological Sciences, Stanford University, Stanford, CA, USA. .,Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, CA, USA.
| | - Ho-Kwang Mao
- Center for High Pressure Science and Technology Advanced Research, Shanghai, China.
| | - Qiaoshi Zeng
- Center for High Pressure Science and Technology Advanced Research, Shanghai, China.
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6
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Dong X, Oganov AR, Cui H, Zhou XF, Wang HT. Electronegativity and chemical hardness of elements under pressure. Proc Natl Acad Sci U S A 2022; 119:e2117416119. [PMID: 35238642 PMCID: PMC8915985 DOI: 10.1073/pnas.2117416119] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2021] [Accepted: 01/21/2022] [Indexed: 11/18/2022] Open
Abstract
SignificanceOver the years, many unusual chemical phenomena have been discovered at high pressures, yet our understanding of them is still very fragmentary. Our paper addresses this from the fundamental level by exploring the key chemical properties of atoms-electronegativity and chemical hardness-as a function of pressure. We have made an appropriate modification to the definition of Mulliken electronegativity to extend its applicability to high pressures. The change in atomic properties, which we observe, allows us to provide a unified framework explaining (and predicting) many chemical phenomena and the altered behavior of many elements under pressure.
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Affiliation(s)
- Xiao Dong
- Key Laboratory of Weak-Light Nonlinear Photonics and School of Physics, Nankai University, Tianjin 300071, China
| | - Artem R. Oganov
- Skolkovo Institute of Science and Technology, Skolkovo Innovation Center, Moscow 121205, Russia
| | - Haixu Cui
- College of Physics and Materials Science, Tianjin Normal University, Tianjin 300387, China
| | - Xiang-Feng Zhou
- Center for High-Pressure Science, State Key Laboratory of Metastable Materials Science and Technology, School of Science, Yanshan University, Qinhuangdao 066004, China
| | - Hui-Tian Wang
- National Laboratory of Solid-State Microstructures, School of Physics, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China
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7
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Lobanov SS, Speziale S, Winkler B, Milman V, Refson K, Schifferle L. Electronic, Structural, and Mechanical Properties of SiO_{2} Glass at High Pressure Inferred from its Refractive Index. PHYSICAL REVIEW LETTERS 2022; 128:077403. [PMID: 35244414 DOI: 10.1103/physrevlett.128.077403] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2021] [Revised: 11/29/2021] [Accepted: 12/23/2021] [Indexed: 06/14/2023]
Abstract
We report the first direct measurements of the refractive index of silica glass up to 145 GPa that allowed quantifying its density, bulk modulus, Lorenz-Lorentz polarizability, and band gap. These properties show two major anomalies at ∼10 and ∼40 GPa. The anomaly at ∼10 GPa signals the onset of the increase in Si coordination, and the anomaly at ∼40 GPa corresponds to a nearly complete vanishing of fourfold Si. More generally, we show that the compressibility and density of noncrystalline solids can be accurately measured in simple optical experiments up to at least 110 GPa.
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Affiliation(s)
- Sergey S Lobanov
- Deutsches GeoForschungsZentrum GFZ, Telegrafenberg, 14473 Potsdam, Germany
- Institut für Geowissenschaften, Universität Potsdam, Karl-Liebknecht-Str. 24-25, Golm 14476, Germany
| | - Sergio Speziale
- Deutsches GeoForschungsZentrum GFZ, Telegrafenberg, 14473 Potsdam, Germany
| | - Björn Winkler
- Institut für Geowissenschaften, Goethe-Universität Frankfurt, Altenhöferallee 1, 60438 Frankfurt am Main, Germany
| | - Victor Milman
- Dassault Systèmes BIOVIA, 334 Science Park, Cambridge CB4 0WN, United Kingdom
| | - Keith Refson
- ISIS Facility, Rutherford Appleton Laboratory, Chilton, Didcot, Oxfordshire OX11 0QX, United Kingdom
| | - Lukas Schifferle
- Deutsches GeoForschungsZentrum GFZ, Telegrafenberg, 14473 Potsdam, Germany
- Institut für Geowissenschaften, Universität Potsdam, Karl-Liebknecht-Str. 24-25, Golm 14476, Germany
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8
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Micoulaut M, Laurent O. Noble gas in densified liquid and amorphous silica and thermodynamic conditions for the emergence of bubbles. J Chem Phys 2021; 155:054504. [PMID: 34364356 DOI: 10.1063/5.0056362] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Different noble gases (He, Ne, and Ar) containing densified silica liquids and glasses are investigated from molecular dynamics simulations at different system densities using a dedicated force field. The results for pure silica are first compared to reference potentials prior to an investigation of the thermodynamic diagram, the diffusivity, and the structure under different (T, P) conditions. It is found that the equation of state and the diffusivity are weakly sensitive to the nature of the incorporated noble gas, leading to a similar trend with density for all systems. The network structure is weakly altered by the presence of the gas, and pressure induced structural changes are those usually found for amorphous and liquid silica, i.e., Si coordination increase, tetrahedral to octahedral conversion of the base geometry, and collapse of large rings under pressure. Ne- and Ar-based systems display an increased structuration, however, as preferential distances appear in gas-gas correlations at large densities in both the liquid and amorphous states. Finally, we focus on the conditions of heterogeneity that are driven by the formation of noble gas bubbles, and these appear for a threshold density ρc that is observed for all systems.
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Affiliation(s)
- M Micoulaut
- Sorbonne Université, Laboratoire de Physique Théorique de la Matière Condensée, CNRS UMR 7600, 4 Place Jussieu, 75252 Paris Cedex 05, France
| | - O Laurent
- Sorbonne Université, Laboratoire de Physique Théorique de la Matière Condensée, CNRS UMR 7600, 4 Place Jussieu, 75252 Paris Cedex 05, France
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9
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Li Y, Ye M, Tang R, Chen J, Qu X, Yang B, Wang X, Yue H, Zhu P. Pressure-induced isostructural phase transition in Ti 3AlC 2: experimental and theoretical investigation. Phys Chem Chem Phys 2020; 22:13136-13142. [PMID: 32490452 DOI: 10.1039/d0cp01023e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The structural stability of Ti3AlC2 under high pressure is important for understanding its mechanical properties. Here, we conducted a high hydrostatic pressure synchrotron X-ray diffraction experiment and no structural phase transition was observed. Like most other MAX phases, Ti3AlC2 showed an anisotropic compression behavior. Most importantly, an anomaly in c/a ratio was observed at 20.3 GPa, indicating that a pressure-induced isostructural phase transition occurred here. Analysis of the electronic band structure and Fermi surface revealed that three bands crossed the Fermi surface under compression, which suggested that this isostructural phase transition can be considered to be motivated by an electronic topological transition. The subsequent Hall-effect measurements reconfirmed this variation of the electronic band at the Fermi surface, which can be regarded as the electronic origin for the observed isostructural phase transition. These results enrich the basic property data of Ti3AlC2 and would benefit the further understanding of this promising material.
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Affiliation(s)
- Yan Li
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun, 130012, China.
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10
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Abstract
The structure of hydrous amorphous SiO2 is fundamental in order to investigate the effects of water on the physicochemical properties of oxide glasses and magma. The hydrous SiO2 glass with 13 wt.% D2O was synthesized under high-pressure and high-temperature conditions and its structure was investigated by small angle X-ray scattering, X-ray diffraction, and neutron diffraction experiments at pressures of up to 10 GPa and room temperature. This hydrous glass is separated into two phases: a major phase rich in SiO2 and a minor phase rich in D2O molecules distributed as small domains with dimensions of less than 100 Å. Medium-range order of the hydrous glass shrinks compared to the anhydrous SiO2 glass by disruption of SiO4 linkage due to the formation of Si–OD deuterioxyl, while the response of its structure to pressure is almost the same as that of the anhydrous SiO2 glass. Most of D2O molecules are in the small domains and hardly penetrate into the void space in the ring consisting of SiO4 tetrahedra.
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11
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Bai Y, Liu Z, Botana J, Yan D, Lin HQ, Sun J, Pickard CJ, Needs RJ, Miao MS. Electrostatic force driven helium insertion into ammonia and water crystals under pressure. Commun Chem 2019. [DOI: 10.1038/s42004-019-0204-6] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
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12
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Dulski M, Peszke J, Włodarczyk J, Sułowicz S, Piotrowska-Seget Z, Dudek K, Podwórny J, Malarz K, Mrozek-Wilczkiewicz A, Zubko M, Nowak A. Physicochemical and structural features of heat treated silver-silica nanocomposite and their impact on biological properties. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 103:109790. [PMID: 31349451 DOI: 10.1016/j.msec.2019.109790] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/11/2018] [Revised: 05/23/2019] [Accepted: 05/23/2019] [Indexed: 12/28/2022]
Abstract
In the last few decades, many nanostructures with varying properties and possible applications have been developed. These materials have been intended to work in various environmental temperature conditions. In this context, the main challenge has been to comprehend the impact of synergic interaction between individual elements included in non-annealed materials in relation to systems subjected to temperature impact. Another problem has corresponded to the impact of thermal modification on organisms such as bacteria and human cells. Such problems can be solved by the fabrication of a nanocomposite with mono-dispersed 8 nm silver (Ag0 or Ag+) embedded into a silica carrier, followed by the analysis of the impact of heat treatment under various temperature conditions on its physicochemical features. Therefore, methodical studies reported in this text have shown an increase of silver particle size up to 170 nm, a decrease of its concentration, as well as the formation of sub-nanometer Ag+ and/or Ag2+ clusters as the temperature rises to 1173 K. In turn, the structurally disordered silica carrier had been entirely transformed to cristobalite and tridymite only at 1473 K as well as partial reduction of Ag2+ to Ag+. Simultaneously, inhibition of growth of Gram-positive and Gram-negative bacteria, as well as an increase in cytotoxicity towards human cells was observed as the temperature rose. As a final point, for the first time, a "pseudo" phase diagram of the structural alterations in the Ag/SiO2 nanocomposite has been created, as well as a model of silver-silica transformation to biological systems has been developed.
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Affiliation(s)
- M Dulski
- Institute of Material Science, University of Silesia, 75 Pułku Piechoty 1a, 41-500 Chorzów, Poland; Silesian Center for Education and Interdisciplinary Research, 75 Pułku Piechoty 1A, 41-500 Chorzów, Poland.
| | - J Peszke
- Silesian Center for Education and Interdisciplinary Research, 75 Pułku Piechoty 1A, 41-500 Chorzów, Poland; A. Chełkowski Institute of Physics, University of Silesia, 75 Pułku Piechoty 1, 41-500 Chorzów, Poland
| | - J Włodarczyk
- Institute of Material Science, University of Silesia, 75 Pułku Piechoty 1a, 41-500 Chorzów, Poland
| | - S Sułowicz
- Department of Microbiology, University of Silesia, Jagiellońska 28, 40-032 Katowice, Poland
| | - Z Piotrowska-Seget
- Department of Microbiology, University of Silesia, Jagiellońska 28, 40-032 Katowice, Poland
| | - K Dudek
- Łukasiewicz R&D Network, Institute of Ceramics and Building Materials, Refractory Materials Division in Gliwice, Toszecka 99, 44-100 Gliwice, Poland
| | - J Podwórny
- Łukasiewicz R&D Network, Institute of Ceramics and Building Materials, Refractory Materials Division in Gliwice, Toszecka 99, 44-100 Gliwice, Poland
| | - K Malarz
- Silesian Center for Education and Interdisciplinary Research, 75 Pułku Piechoty 1A, 41-500 Chorzów, Poland; A. Chełkowski Institute of Physics, University of Silesia, 75 Pułku Piechoty 1, 41-500 Chorzów, Poland
| | - A Mrozek-Wilczkiewicz
- Silesian Center for Education and Interdisciplinary Research, 75 Pułku Piechoty 1A, 41-500 Chorzów, Poland; A. Chełkowski Institute of Physics, University of Silesia, 75 Pułku Piechoty 1, 41-500 Chorzów, Poland
| | - M Zubko
- Institute of Material Science, University of Silesia, 75 Pułku Piechoty 1a, 41-500 Chorzów, Poland; Silesian Center for Education and Interdisciplinary Research, 75 Pułku Piechoty 1A, 41-500 Chorzów, Poland; Department of Physics, University of Hradec Králové, 500-03 Rokitanského 62, Hradec Králové, Czech Republic
| | - A Nowak
- Silesian Center for Education and Interdisciplinary Research, 75 Pułku Piechoty 1A, 41-500 Chorzów, Poland; A. Chełkowski Institute of Physics, University of Silesia, 75 Pułku Piechoty 1, 41-500 Chorzów, Poland
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13
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Mir AH, Hinks JA, Delaye JM, Peuget S, Donnelly SE. Xenon solubility and formation of supercritical xenon precipitates in glasses under non-equilibrium conditions. Sci Rep 2018; 8:15320. [PMID: 30333499 PMCID: PMC6192981 DOI: 10.1038/s41598-018-33556-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2018] [Accepted: 09/27/2018] [Indexed: 11/28/2022] Open
Abstract
Estimates of noble gas solubility in glasses and minerals are important to understand the origin of these gases, particularly xenon, in the atmosphere. However, technical difficulties and ambiguities in quantifying the dissolved gases introduce large uncertainties in the solubility estimates. We present here the use of transmission electron microscopy (TEM) with in-situ noble gas ion implantation as a non-equilibrium approach for noble gas solubility estimates. Using a suitable Xe equation of state and Monte-Carlo simulations of TEM images, a clear distinction between Xe filled precipitates and empty voids is made. Furthermore, implantation-induced changes in the solubility are estimated using molecular dynamics simulations. These studies allow us to evaluate the xenon solubility of irradiated and pristine silica glasses and monitor in-situ the diffusion-mediated dynamics between the precipitates and voids — otherwise impossible to capture. On exceeding the solubility limit, supercritical xenon precipitates, stable at least up to 1155 K, are formed. The results highlight the high capacity of silicates to store xenon and, predict higher solubility of radiogenic xenon due to the accompanying radiation damage.
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Affiliation(s)
- Anamul H Mir
- Electron Microscopy and Materials Analysis, School of Computing and Engineering, University of Huddersfield, Queensgate, Huddersfield, HD1 3DH, United Kingdom.
| | - J A Hinks
- Electron Microscopy and Materials Analysis, School of Computing and Engineering, University of Huddersfield, Queensgate, Huddersfield, HD1 3DH, United Kingdom
| | - Jean-Marc Delaye
- CEA, DEN, Laboratoire d'Étude des Matériaux et Procédés Actif, 30207, Bagnols-sur-Cèze, France
| | - Sylvain Peuget
- CEA, DEN, Laboratoire d'Étude des Matériaux et Procédés Actif, 30207, Bagnols-sur-Cèze, France
| | - S E Donnelly
- Electron Microscopy and Materials Analysis, School of Computing and Engineering, University of Huddersfield, Queensgate, Huddersfield, HD1 3DH, United Kingdom
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14
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Guńka PA, Hapka M, Hanfland M, Dranka M, Chałasiński G, Zachara J. How and Why Does Helium Permeate Nonporous Arsenolite Under High Pressure? Chemphyschem 2018; 19:857-864. [PMID: 29341365 DOI: 10.1002/cphc.201701156] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2017] [Revised: 12/06/2017] [Indexed: 11/06/2022]
Abstract
Investigations into the helium permeation of arsenolite, the cubic, molecular arsenic(III) oxide polymorph As4 O6 , were carried out to understand how and why arsenolite helium clathrate As4 O6 ⋅2 He is formed. High-pressure synchrotron X-ray diffraction experiments on arsenolite single crystals revealed that the permeation of helium into nonporous arsenolite depends on the time for which the crystal is subjected to high pressure and on the crystal history. The single crystal was totally transformed into As4 O6 ⋅2 He within 45 h under 5 GPa. After release of the pressure, arsenolite was recovered and a repeated increase in pressure up to 3 GPa led to practically instant As4 O6 ⋅2 He formation. However, when a pristine arsenolite single crystal was quickly subjected to a pressure of 13 GPa, no helium permeation was observed at all. No neon permeation was observed in analogous experiments. Quantum mechanical computations indicate that there are no specific attractive interactions between He atoms and As4 O6 molecules at the distances observed in the As4 O6 ⋅2 He crystal structure. Detailed analysis of As4 O6 molecular structure changes has shown that the introduction of He into the arsenolite crystal lattice significantly reduces molecular deformations by decreasing the anisotropy of stress exerted on the As4 O6 molecules. This effect and the pΔV term, rather than any specific As⋅⋅⋅He binding, are the driving forces for the formation As4 O6 ⋅2 He.
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Affiliation(s)
- Piotr A Guńka
- Faculty of Chemistry, Warsaw University of Technology, Noakowskiego 3, 00-664, Warszawa, Poland
| | - Michał Hapka
- Faculty of Chemistry, University of Warsaw, Pasteura 1, 02-093, Warszawa, Poland
| | - Michael Hanfland
- European Synchrotron Radiation Facility, 71 avenue des Martyrs, CS 40220, 38043, Grenoble Cedex 9, France
| | - Maciej Dranka
- Faculty of Chemistry, Warsaw University of Technology, Noakowskiego 3, 00-664, Warszawa, Poland
| | - Grzegorz Chałasiński
- Faculty of Chemistry, University of Warsaw, Pasteura 1, 02-093, Warszawa, Poland
| | - Janusz Zachara
- Faculty of Chemistry, Warsaw University of Technology, Noakowskiego 3, 00-664, Warszawa, Poland
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15
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Liu Z, Botana J, Hermann A, Valdez S, Zurek E, Yan D, Lin HQ, Miao MS. Reactivity of He with ionic compounds under high pressure. Nat Commun 2018; 9:951. [PMID: 29507302 PMCID: PMC5838161 DOI: 10.1038/s41467-018-03284-y] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2017] [Accepted: 02/02/2018] [Indexed: 11/26/2022] Open
Abstract
Until very recently, helium had remained the last naturally occurring element that was known not to form stable solid compounds. Here we propose and demonstrate that there is a general driving force for helium to react with ionic compounds that contain an unequal number of cations and anions. The corresponding reaction products are stabilized not by local chemical bonds but by long-range Coulomb interactions that are significantly modified by the insertion of helium atoms, especially under high pressure. This mechanism also explains the recently discovered reactivity of He and Na under pressure. Our work reveals that helium has the propensity to react with a broad range of ionic compounds at pressures as low as 30 GPa. Since most of the Earth’s minerals contain unequal numbers of positively and negatively charged atoms, our work suggests that large quantities of He might be stored in the Earth’s lower mantle. Helium was long thought to be unable to form stable solid compounds, until a recent discovery that helium reacts with sodium at high pressure. Here, the authors demonstrate the driving force for helium reactivity, showing that it can form new compounds under pressure without forming any local chemical bonds.
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Affiliation(s)
- Zhen Liu
- Beijing Computational Science Research Centre, Beijing, 100193, China.,Department of Physics, Beijing Normal University, Beijing, 100875, China.,Department of Chemistry and Biochemistry, California State University Northridge, Northridge, CA, 91330-8262, USA
| | - Jorge Botana
- Beijing Computational Science Research Centre, Beijing, 100193, China.,Department of Chemistry and Biochemistry, California State University Northridge, Northridge, CA, 91330-8262, USA
| | - Andreas Hermann
- Centre for Science at Extreme Conditions and SUPA, School of Physics and Astronomy, The University of Edinburgh, Edinburgh, EH9 3FD, UK
| | - Steven Valdez
- Department of Chemistry and Biochemistry, California State University Northridge, Northridge, CA, 91330-8262, USA
| | - Eva Zurek
- Department of Chemistry, State University of New York at Buffalo, Buffalo, NY, 14260-3000, USA
| | - Dadong Yan
- Department of Physics, Beijing Normal University, Beijing, 100875, China
| | - Hai-Qing Lin
- Beijing Computational Science Research Centre, Beijing, 100193, China
| | - Mao-Sheng Miao
- Beijing Computational Science Research Centre, Beijing, 100193, China. .,Department of Chemistry and Biochemistry, California State University Northridge, Northridge, CA, 91330-8262, USA.
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16
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Clark AN, Lesher CE. Elastic properties of silicate melts: Implications for low velocity zones at the lithosphere-asthenosphere boundary. SCIENCE ADVANCES 2017; 3:e1701312. [PMID: 29255800 PMCID: PMC5733110 DOI: 10.1126/sciadv.1701312] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/24/2017] [Accepted: 11/13/2017] [Indexed: 06/07/2023]
Abstract
Low seismic velocity regions in the mantle and crust are commonly attributed to the presence of silicate melts. Determining melt volume and geometric distribution is fundamental to understanding planetary dynamics. We present a new model for seismic velocity reductions that accounts for the anomalous compressibility of silicate melt, rendering compressional wave velocities more sensitive to melt fraction and distribution than previous estimates. Forward modeling predicts comparable velocity reductions for compressional and shear waves for partially molten mantle, and for low velocity regions associated with the lithosphere-asthenosphere boundary (LAB), melt present at <5% distributed in near-textural equilibrium. These findings reconcile seismic observations for the LAB regionally and locally and favor models of strong coupling across the LAB rather than melt channeling due to shear deformation.
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Affiliation(s)
- Alisha N. Clark
- Department of Earth and Planetary Sciences, University of California, Davis, Davis, CA 95616, USA
- UMR CNRS 7590, Institut de minéralogie et de physique des milieux condensés, Université Pierre-et-Marie-Curie, 75005 Paris, France
- Department of Earth and Planetary Science, Northwestern University, Evanston, IL 60208, USA
| | - Charles E. Lesher
- Department of Earth and Planetary Sciences, University of California, Davis, Davis, CA 95616, USA
- Department of Geoscience, Aarhus University, DK-8000 Aarhus C, Denmark
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17
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Petitgirard S, Malfait WJ, Journaux B, Collings IE, Jennings ES, Blanchard I, Kantor I, Kurnosov A, Cotte M, Dane T, Burghammer M, Rubie DC. SiO_{2} Glass Density to Lower-Mantle Pressures. PHYSICAL REVIEW LETTERS 2017; 119:215701. [PMID: 29219420 DOI: 10.1103/physrevlett.119.215701] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2016] [Indexed: 06/07/2023]
Abstract
The convection or settling of matter in the deep Earth's interior is mostly constrained by density variations between the different reservoirs. Knowledge of the density contrast between solid and molten silicates is thus of prime importance to understand and model the dynamic behavior of the past and present Earth. SiO_{2} is the main constituent of Earth's mantle and is the reference model system for the behavior of silicate melts at high pressure. Here, we apply our recently developed x-ray absorption technique to the density of SiO_{2} glass up to 110 GPa, doubling the pressure range for such measurements. Our density data validate recent molecular dynamics simulations and are in good agreement with previous experimental studies conducted at lower pressure. Silica glass rapidly densifies up to 40 GPa, but the density trend then flattens to become asymptotic to the density of SiO_{2} minerals above 60 GPa. The density data present two discontinuities at ∼17 and ∼60 GPa that can be related to a silicon coordination increase from 4 to a mixed 5/6 coordination and from 5/6 to sixfold, respectively. SiO_{2} glass becomes denser than MgSiO_{3} glass at ∼40 GPa, and its density becomes identical to that of MgSiO_{3} glass above 80 GPa. Our results on SiO_{2} glass may suggest that a variation of SiO_{2} content in a basaltic or pyrolitic melt with pressure has at most a minor effect on the final melt density, and iron partitioning between the melts and residual solids is the predominant factor that controls melt buoyancy in the lowermost mantle.
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Affiliation(s)
| | - Wim J Malfait
- Laboratory for Building Energy Materials and Components, Swiss Federal Laboratories for Materials Science and Technology, Empa, 8600 Dübendorf, Switzerland
| | - Baptiste Journaux
- Institut des Géosciences de l'Environnement-UMR 5001, Université Grenoble Alpes CS 40700, 38 058 Grenoble Cedex 9, France
| | - Ines E Collings
- Laboratory of Crystallography, University of Bayreuth, Bayreuth D-95440, Germany
- European Synchrotron Radiation Facility, BP 220, Grenoble F-38043, France
| | - Eleanor S Jennings
- Bayerisches Geoinstitut, University of Bayreuth, Bayreuth D-95440, Germany
| | - Ingrid Blanchard
- Bayerisches Geoinstitut, University of Bayreuth, Bayreuth D-95440, Germany
| | | | - Alexander Kurnosov
- Bayerisches Geoinstitut, University of Bayreuth, Bayreuth D-95440, Germany
| | - Marine Cotte
- European Synchrotron Radiation Facility, BP 220, Grenoble F-38043, France
- Sorbonne Universités, UPMC Univ Paris 06, CNRS, UMR 8220, Laboratoire d'archéologie moléculaire et structurale (LAMS), 4 Place Jussieu 75005 Paris, France
| | - Thomas Dane
- European Synchrotron Radiation Facility, BP 220, Grenoble F-38043, France
| | - Manfred Burghammer
- European Synchrotron Radiation Facility, BP 220, Grenoble F-38043, France
| | - David C Rubie
- Bayerisches Geoinstitut, University of Bayreuth, Bayreuth D-95440, Germany
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18
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Hester BR, Dos Santos AM, Molaison JJ, Hancock JC, Wilkinson AP. Synthesis of Defect Perovskites (He 2-x□ x)(CaZr)F 6 by Inserting Helium into the Negative Thermal Expansion Material CaZrF 6. J Am Chem Soc 2017; 139:13284-13287. [PMID: 28892378 DOI: 10.1021/jacs.7b07860] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Defect perovskites (He2-x□x)(CaZr)F6 can be prepared by inserting helium into CaZrF6 at high pressure. They can be recovered to ambient pressure at low temperature. There are no prior examples of perovskites with noble gases on the A-sites. The insertion of helium gas into CaZrF6 both elastically stiffens the material and reduces the magnitude of its negative thermal expansion. It also suppresses the onset of structural disorder, which is seen on compression in other media. Measurements of the gas released on warming to room temperature and Rietveld analyses of neutron diffraction data at low temperature indicate that exposure to helium gas at 500 MPa leads to a stoichiometry close to (He1□1)(CaZr)F6. Helium has a much higher solubility in CaZrF6 than silica glass or crystobalite. An analogue with composition (H2)2(CaZr)F6 would have a volumetric hydrogen storage capacity greater than current US DOE targets. We anticipate that other hybrid perovskites with small neutral molecules on the A-site can also be prepared and that they will display a rich structural chemistry.
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Affiliation(s)
- Brett R Hester
- School of Chemistry and Biochemistry, Georgia Institute of Technology , Atlanta, Georgia 30332-0400, United States
| | - António M Dos Santos
- Neutron Science Directorate, Oak Ridge National Laboratory , Oak Ridge, Tennessee 37831, United States
| | - Jamie J Molaison
- Neutron Science Directorate, Oak Ridge National Laboratory , Oak Ridge, Tennessee 37831, United States
| | - Justin C Hancock
- School of Chemistry and Biochemistry, Georgia Institute of Technology , Atlanta, Georgia 30332-0400, United States
| | - Angus P Wilkinson
- School of Chemistry and Biochemistry, Georgia Institute of Technology , Atlanta, Georgia 30332-0400, United States.,School of Materials Science and Engineering, Georgia Institute of Technology , Atlanta, Georgia 30332-0245, United States
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19
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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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20
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Antioxidant property of SiO2-eugenol liposome loaded nanofibrous membranes on beef. Food Packag Shelf Life 2017. [DOI: 10.1016/j.fpsl.2017.01.001] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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21
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Peszke J, Dulski M, Nowak A, Balin K, Zubko M, Sułowicz S, Nowak B, Piotrowska-Seget Z, Talik E, Wojtyniak M, Mrozek-Wilczkiewicz A, Malarz K, Szade J. Unique properties of silver and copper silica-based nanocomposites as antimicrobial agents. RSC Adv 2017. [DOI: 10.1039/c7ra00720e] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The paper reports a new route for the fabrication and determination of physicochemical properties and biological activity, of metallic silica-based nanostructure (Ag/SiO2, Cu/SiO2).
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22
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Collings IE, Bykova E, Bykov M, Petitgirard S, Hanfland M, Paliwoda D, Dubrovinsky L, Dubrovinskaia N. Neon-Bearing Ammonium Metal Formates: Formation and Behaviour under Pressure. Chemphyschem 2016; 17:3369-3372. [PMID: 27500946 DOI: 10.1002/cphc.201600854] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2016] [Revised: 05/02/2016] [Indexed: 11/05/2022]
Abstract
The incorporation of noble gas atoms, in particular neon, into the pores of network structures is very challenging due to the weak interactions they experience with the network solid. Using high-pressure single-crystal X-ray diffraction, we demonstrate that neon atoms enter into the extended network of ammonium metal formates, thus forming compounds Nex [NH4 ][M(HCOO)3 ]. This phenomenon modifies the compressional and structural behaviours of the ammonium metal formates under pressure. The neon atoms can be clearly localised within the centre of [M(HCOO)3 ]5 cages and the total saturation of this site is achieved after ∼1.5 GPa. We find that by using argon as the pressure-transmitting medium, the inclusion inside [NH4 ][M(HCOO)3 ] is inhibited due to the larger size of the argon. This study illustrates the size selectivity of [NH4 ][M(HCOO)3 ] compounds between neon and argon insertion under pressure, and the effect of inclusion on the high-pressure behaviour of neon-bearing ammonium metal formates.
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Affiliation(s)
- Ines E Collings
- Laboratory of Crystallography, University of Bayreuth, 95440, Bayreuth, Germany
| | - Elena Bykova
- Bayerisches Geoinstitut, University of Bayreuth, 95440, Bayreuth, Germany
| | - Maxim Bykov
- Bayerisches Geoinstitut, University of Bayreuth, 95440, Bayreuth, Germany
| | | | - Michael Hanfland
- European Radiation Synchrotron Facility, BP 220, 38043, Grenoble, Cedex 9, France
| | - Damian Paliwoda
- European Radiation Synchrotron Facility, BP 220, 38043, Grenoble, Cedex 9, France
| | - Leonid Dubrovinsky
- Bayerisches Geoinstitut, University of Bayreuth, 95440, Bayreuth, Germany
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23
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Zakharov BA, Seryotkin YV, Tumanov NA, Paliwoda D, Hanfland M, Kurnosov AV, Boldyreva EV. The role of fluids in high-pressure polymorphism of drugs: different behaviour of β-chlorpropamide in different inert gas and liquid media. RSC Adv 2016. [DOI: 10.1039/c6ra17750f] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Compression of β-chlorpropamide gives different phases depending on the choice of non-dissolving pressure-transmitting fluid (paraffin, neon and helium).
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Affiliation(s)
- B. A. Zakharov
- Institute of Solid State Chemistry and Mechanochemistry SB RAS
- Novosibirsk 630128
- Russia
- Novosibirsk State University
- Novosibirsk 630090
| | - Y. V. Seryotkin
- Institute of Solid State Chemistry and Mechanochemistry SB RAS
- Novosibirsk 630128
- Russia
- Novosibirsk State University
- Novosibirsk 630090
| | - N. A. Tumanov
- Institute of Condensed Matter and Nanosciences
- Université catholique de Louvain
- Louvain-la-Neuve 1348
- Belgium
- Université de Namur
| | - D. Paliwoda
- European Synchrotron Radiation Facility
- Grenoble 38000
- France
| | - M. Hanfland
- European Synchrotron Radiation Facility
- Grenoble 38000
- France
| | - A. V. Kurnosov
- Bayerisches Geoinstitut
- Universität Bayreuth
- Bayreuth D-95447
- Germany
| | - E. V. Boldyreva
- Institute of Solid State Chemistry and Mechanochemistry SB RAS
- Novosibirsk 630128
- Russia
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24
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Polymorphic phase transition mechanism of compressed coesite. Nat Commun 2015; 6:6630. [PMID: 25791830 DOI: 10.1038/ncomms7630] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2014] [Accepted: 02/13/2015] [Indexed: 11/08/2022] Open
Abstract
Silicon dioxide is one of the most abundant natural compounds. Polymorphs of SiO₂ and their phase transitions have long been a focus of great interest and intense theoretical and experimental pursuits. Here, compressing single-crystal coesite SiO₂ under hydrostatic pressures of 26-53 GPa at room temperature, we discover a new polymorphic phase transition mechanism of coesite to post-stishovite, by means of single-crystal synchrotron X-ray diffraction experiment and first-principles computational modelling. The transition features the formation of multiple previously unknown triclinic phases of SiO₂ on the transition pathway as structural intermediates. Coexistence of the low-symmetry phases results in extensive splitting of the original coesite X-ray diffraction peaks that appear as dramatic peak broadening and weakening, resembling an amorphous material. This work sheds light on the long-debated pressure-induced amorphization phenomenon of SiO₂, but also provides new insights into the densification mechanism of tetrahedrally bonded structures common in nature.
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25
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Funamori N, Kojima KM, Wakabayashi D, Sato T, Taniguchi T, Nishiyama N, Irifune T, Tomono D, Matsuzaki T, Miyazaki M, Hiraishi M, Koda A, Kadono R. Muonium in stishovite: implications for the possible existence of neutral atomic hydrogen in the earth's deep mantle. Sci Rep 2015; 5:8437. [PMID: 25675890 PMCID: PMC4326963 DOI: 10.1038/srep08437] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2014] [Accepted: 01/19/2015] [Indexed: 11/09/2022] Open
Abstract
Hydrogen in the Earth's deep interior has been thought to exist as a hydroxyl group in high-pressure minerals. We present Muon Spin Rotation experiments on SiO2 stishovite, which is an archetypal high-pressure mineral. Positive muon (which can be considered as a light isotope of proton) implanted in stishovite was found to capture electron to form muonium (corresponding to neutral hydrogen). The hyperfine-coupling parameter and the relaxation rate of spin polarization of muonium in stishovite were measured to be very large, suggesting that muonium is squeezed in small and anisotropic interstitial voids without binding to silicon or oxygen. These results imply that hydrogen may also exist in the form of neutral atomic hydrogen in the deep mantle.
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Affiliation(s)
- Nobumasa Funamori
- Department of Earth and Planetary Science, University of Tokyo, Tokyo 113-0033, Japan
| | - Kenji M Kojima
- Muon Science Laboratory, Institute of Materials Structure Science, High Energy Accelerator Research Organization, Tsukuba 305-0801, Japan
| | - Daisuke Wakabayashi
- Department of Earth and Planetary Science, University of Tokyo, Tokyo 113-0033, Japan
| | - Tomoko Sato
- Department of Earth and Planetary Systems Science, Hiroshima University, Higashi-Hiroshima 739-8526, Japan
| | | | - Norimasa Nishiyama
- Geodynamics Research Center, Ehime University, Matsuyama 790-8577, Japan
| | - Tetsuo Irifune
- 1] Geodynamics Research Center, Ehime University, Matsuyama 790-8577, Japan [2] Earth-Life Science Institute, Tokyo Institute of Technology, Tokyo 152-8550, Japan
| | - Dai Tomono
- Nishina Center for Accelerator-Based Science, RIKEN, Wako 351-0198, Japan
| | | | - Masanori Miyazaki
- Muon Science Laboratory, Institute of Materials Structure Science, High Energy Accelerator Research Organization, Tsukuba 305-0801, Japan
| | - Masatoshi Hiraishi
- Muon Science Laboratory, Institute of Materials Structure Science, High Energy Accelerator Research Organization, Tsukuba 305-0801, Japan
| | - Akihiro Koda
- Muon Science Laboratory, Institute of Materials Structure Science, High Energy Accelerator Research Organization, Tsukuba 305-0801, Japan
| | - Ryosuke Kadono
- Muon Science Laboratory, Institute of Materials Structure Science, High Energy Accelerator Research Organization, Tsukuba 305-0801, Japan
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26
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Coasne B, Weigel C, Polian A, Kint M, Rouquette J, Haines J, Foret M, Vacher R, Rufflé B. Poroelastic theory applied to the adsorption-induced deformation of vitreous silica. J Phys Chem B 2014; 118:14519-25. [PMID: 25383694 DOI: 10.1021/jp5094383] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
When vitreous silica is submitted to high pressures under a helium atmosphere, the change in volume observed is much smaller than expected from its elastic properties. It results from helium penetration into the interstitial free volume of the glass network. We present here the results of concurrent spectroscopic experiments using either helium or neon and molecular simulations relating the amount of gas adsorbed to the strain of the network. We show that a generalized poromechanical approach, describing the elastic properties of microporous materials upon adsorption, can be applied successfully to silica glass in which the free volume exists only at the subnanometer scale. In that picture, the adsorption-induced deformation accounts for the small apparent compressibility of silica observed in experiments.
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Affiliation(s)
- Benoit Coasne
- Institut Charles Gerhardt Montpellier, CNRS/Université Montpellier 2/ENSCM/UMR 5253 , F-34095 Montpellier, France
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27
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Shin J, Park K, Ryu WH, Jung JW, Kim ID. Graphene wrapping as a protective clamping layer anchored to carbon nanofibers encapsulating Si nanoparticles for a Li-ion battery anode. NANOSCALE 2014; 6:12718-12726. [PMID: 25219404 DOI: 10.1039/c4nr03173c] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Carbon nanofibers encapsulating Si nanoparticles (CNFs/SiNPs) were prepared via an electrospinning method and chemically functionalized with 3-aminopropyltriethoxysilane (APS) to be grafted onto graphene oxide (GO). As a result, the thin and flexible GO, which exhibits a negative charge in aqueous solution, fully wrapped around the APS-functionalized CNFs with a positive surface charge via electrostatic self-assembly. After the formation of chemical bonds between the epoxy groups on GO and the amine groups in APS via an epoxy ring opening reaction, the GO was chemically reduced to a reduced graphene oxide (rGO). Electrochemical and morphological characterizations showed that capacity loss by structural degradation and electrolyte decomposition on Si surface were significantly suppressed in the rGO-wrapped CNFs/SiNPs (CNFs/SiNPs@rGO). Superior capacities were consequently maintained for up to 200 cycles at a high current density (1048 mA h g(-1) at 890 mA g(-1)) compared to CNFs/SiNPs without the rGO wrapping (304 mA h g(-1) at 890 mA g(-1)). Moreover, the resistance of the SEI layer and charge transfer resistance were also considerably reduced by 24% and 88%, respectively. The described graphene wrapping offers a versatile way to enhance the mechanical integrity and electrochemical stability of Si composite anode materials.
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Affiliation(s)
- Jungwoo Shin
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, 291 Daehak-ro, Yuseong-gu, Daejeon 305-701, Republic of Korea.
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Meersman F, McMillan PF. High hydrostatic pressure: a probing tool and a necessary parameter in biophysical chemistry. Chem Commun (Camb) 2014; 50:766-75. [PMID: 24286104 DOI: 10.1039/c3cc45844j] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
High pressures extending up to several thousands of atmospheres provide extreme conditions for biological organisms to survive. Recent studies are investigating the survival mechanisms and biological function of microorganisms under natural and laboratory conditions extending into the GigaPascal range, with applications to understanding the Earth's deep biosphere and food technology. High pressure has also emerged as a useful tool and physical parameter for probing changes in the structure and functional properties of biologically important macromolecules and polymers encountered in soft matter science. Here we highlight some areas of current interest in high pressure biophysics and physical chemistry that are emerging at the frontier of this cross-disciplinary field.
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Affiliation(s)
- Filip Meersman
- Department of Chemistry, University College London, 20 Gordon St., London WC1H 0AJ, UK.
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Efimchenko VS, Fedotov VK, Kuzovnikov MA, Meletov KP, Bulychev BM. Hydrogen Solubility in Cristobalite at High Pressure. J Phys Chem A 2014; 118:10268-72. [DOI: 10.1021/jp509470q] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Vadim S. Efimchenko
- Institute of Solid State Physics RAS, 142432 Chernogolovka, Moscow
District, Russia
| | - Vladimir K. Fedotov
- Institute of Solid State Physics RAS, 142432 Chernogolovka, Moscow
District, Russia
| | - Mikhail A. Kuzovnikov
- Institute of Solid State Physics RAS, 142432 Chernogolovka, Moscow
District, Russia
- Institute of Physical Chemistry PAS, Kasprzaka 44/52, 01-224 Warsaw, Poland
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Rozsa VF, Strobel TA. Triple Guest Occupancy and Negative Compressibility in Hydrogen-Loaded β-Hydroquinone Clathrate. J Phys Chem Lett 2014; 5:1880-1884. [PMID: 26273868 DOI: 10.1021/jz5005895] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The molecular interactions and structural behavior of a previously unexplored clathrate system, hydrogen-loaded β-hydroquinone (β-HQ+H2), were investigated under high pressure with synchrotron X-ray diffraction and Raman/infrared spectroscopies. The β-HQ+H2 system exhibits coupling of two independently rare phenomena: multiple occupancy and negative compressibility. The number of H2 molecules per cavity increases from one to three, causing unit cell volume increase by way of unique crystallographic interstitial guest positioning. We anticipate these occupancy-derived trends may be general to a range of inclusion compounds and may aid the chemical and crystallographic design of both high-occupancy hydrogen storage clathrates and novel, variable-composition materials with tunable mechanical properties.
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Affiliation(s)
- Viktor F Rozsa
- †Geophysical Laboratory, Carnegie Institution of Washington, Washington, DC 20015, United States
- ‡Department of Physics, Hillsdale College, Hillsdale, Michigan 49242, United States
| | - Timothy A Strobel
- †Geophysical Laboratory, Carnegie Institution of Washington, Washington, DC 20015, United States
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Smedskjaer MM, Rzoska SJ, Bockowski M, Mauro JC. Mixed alkaline earth effect in the compressibility of aluminosilicate glasses. J Chem Phys 2014; 140:054511. [DOI: 10.1063/1.4863998] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
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Diffraction at extreme conditions: a window into the Earth’s interior. RENDICONTI LINCEI 2013. [DOI: 10.1007/s12210-012-0216-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Efimchenko VS, Fedotov VK, Kuzovnikov MA, Zhuravlev AS, Bulychev BM. Hydrogen Solubility in Amorphous Silica at Pressures up to 75 kbar. J Phys Chem B 2012; 117:422-5. [DOI: 10.1021/jp309991x] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Vadim S. Efimchenko
- Institute of Solid State Physics RAS,
142432 Chernogolovka, Moscow District, Russia
| | - Vladimir K. Fedotov
- Institute of Solid State Physics RAS,
142432 Chernogolovka, Moscow District, Russia
| | | | - Andrey S. Zhuravlev
- Institute of Solid State Physics RAS,
142432 Chernogolovka, Moscow District, Russia
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Weigel C, Polian A, Kint M, Rufflé B, Foret M, Vacher R. Vitreous silica distends in helium gas: acoustic versus static compressibilities. PHYSICAL REVIEW LETTERS 2012; 109:245504. [PMID: 23368344 DOI: 10.1103/physrevlett.109.245504] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2012] [Indexed: 06/01/2023]
Abstract
Sound velocities of vitreous silica are measured under He compression in the pressure range of 0-6 GPa by Brillouin light scattering. It is found that the well-known anomalous maximum in the pressure dependence of the compressibility is suppressed by He incorporation into the silica network. This shows that the elastic anomaly relates to the collapse of the largest interstitial voids in the structure. The huge difference between the static and the acoustic compressibilities indicates that the amount of incorporated helium still increases at 6 GPa.
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Affiliation(s)
- Coralie Weigel
- Université Montpellier 2, Laboratoire Charles Coulomb UMR 5221, F-34095 Montpellier, France
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Salmon PS, Drewitt JWE, Whittaker DAJ, Zeidler A, Wezka K, Bull CL, Tucker MG, Wilding MC, Guthrie M, Marrocchelli D. Density-driven structural transformations in network forming glasses: a high-pressure neutron diffraction study of GeO2 glass up to 17.5 GPa. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2012; 24:415102. [PMID: 22951604 DOI: 10.1088/0953-8984/24/41/415102] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The structure of GeO(2) glass was investigated at pressures up to 17.5(5) GPa using in situ time-of-flight neutron diffraction with a Paris-Edinburgh press employing sintered diamond anvils. A new methodology and data correction procedure were developed, enabling a reliable measurement of structure factors that are largely free from diamond Bragg peaks. Calibration curves, which are important for neutron diffraction work on disordered materials, were constructed for pressure as a function of applied load for both single and double toroid anvil geometries. The diffraction data are compared to new molecular-dynamics simulations made using transferrable interaction potentials that include dipole-polarization effects. The results, when taken together with those from other experimental methods, are consistent with four densification mechanisms. The first, at pressures up to approximately equal 5 GPa, is associated with a reorganization of GeO(4) units. The second, extending over the range from approximately equal 5 to 10 GPa, corresponds to a regime where GeO(4) units are replaced predominantly by GeO(5) units. In the third, as the pressure increases beyond ~10 GPa, appreciable concentrations of GeO(6) units begin to form and there is a decrease in the rate of change of the intermediate-range order as measured by the pressure dependence of the position of the first sharp diffraction peak. In the fourth, at about 30 GPa, the transformation to a predominantly octahedral glass is achieved and further densification proceeds via compression of the Ge-O bonds. The observed changes in the measured diffraction patterns for GeO(2) occur at similar dimensionless number densities to those found for SiO(2), indicating similar densification mechanisms for both glasses. This implies a regime from about 15 to 24 GPa where SiO(4) units are replaced predominantly by SiO(5) units, and a regime beyond ~24 GPa where appreciable concentrations of SiO(6) units begin to form.
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