1
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Novikov VN. Temperature dependence of spatial nanoheterogeneities of shear modulus in supercooled glycerol. J Chem Phys 2024; 161:054501. [PMID: 39087539 DOI: 10.1063/5.0215095] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2024] [Accepted: 07/15/2024] [Indexed: 08/02/2024] Open
Abstract
The boson peak in the terahertz vibrational spectrum carries information about nano-heterogeneities in the shear modulus in glass formers. Its evolution upon heating or cooling in a supercooled liquid state may shed light on the temperature dependence of heterogeneities. For this purpose, an analysis of the light scattering spectra of supercooled glycerol in the spectral range of the boson peak and fast relaxation was carried out and the parameters of the boson peak in the temperature range 180-330 K were determined. The temperature dependent frequency of the boson peak was then expressed in terms of the mean-square amplitude of the shear modulus fluctuations. This was done using the heterogeneous elasticity theory in combination with the perturbation theory on small fluctuations and Ioffe-Regel criterion for transverse vibrations in glass formers. The contribution of structural relaxation effects to phonon damping becomes significant with increasing temperature. It is shown here that structural relaxation largely determines the temperature dependence of the mean-square fluctuations of the shear modulus at high temperatures. By solving the inverse problem, the temperature dependence of shear modulus fluctuations was obtained. It shows a rapid decrease above ∼250 K with a linear extrapolation going to zero at the so-called Arrhenius temperature TA = 350 K. Comparison with literature data on the Landau-Placzek ratio shows that they have a similar temperature dependence at T < TA, which is explained by the appearance of nanometer scale spatial heterogeneities below TA. This is confirmed by the temperature dependence of the amplitude of the boson peak.
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Affiliation(s)
- V N Novikov
- Institute of Automation and Electrometry of the Russian Academy of Sciences, 1 Koptyug Ave., Novosibirsk 630090, Russia
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2
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Cassetta M, Giannetta B, Enrichi F, Zaccone C, Mariotto G, Giarola M, Nodari L, Zanatta M, Daldosso N. Effect of the alkali vs iron ratio on glass transition temperature and vibrational properties of synthetic basalt-like glasses. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 293:122430. [PMID: 36780741 DOI: 10.1016/j.saa.2023.122430] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/22/2022] [Revised: 11/12/2022] [Accepted: 01/30/2023] [Indexed: 06/18/2023]
Abstract
Volcanic eruptions generate huge amounts of material with a wide range of compositions and therefore different physicochemical properties. We present a combined Raman and calorimetric study carried out on four synthetic basaltic glasses with different alkali vs iron ratio which spans the typical compositions of basalts on Earth. Differential scanning calorimetry shows that changes of this ratio modify the glass transition interval whereas Raman spectra allow to gain insight about the structure of the glass in the microscopic and macroscopic range. Indeed, our Raman analysis is extended from the high frequency region, characterized by the molecular peaks, to the very low frequency region where glasses exhibit the boson peak. Spectra show a variation of the non-bridging oxygens number that affects the medium range order of the glass and the network interconnections. In the considered substitution interval, the boson peak shape is conserved while its position shift upwards. This means that increasing the alkali vs iron content, the elastic medium hardens but it does not change nature. This study emphasizes the importance of considering the full-range spectra when analysing multicomponent or natural systems with small chemical variations.
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Affiliation(s)
- Michele Cassetta
- Department of Computer Sciences, University of Verona, I-37134 Verona, Italy.
| | - Beatrice Giannetta
- Department of Biotechnology, University of Verona, I-37134 Verona, Italy
| | - Francesco Enrichi
- Department of Computer Sciences, University of Verona, I-37134 Verona, Italy
| | - Claudio Zaccone
- Department of Biotechnology, University of Verona, I-37134 Verona, Italy; National Institute of Geophysics and Volcanology, I-00143 Roma, Italy
| | - Gino Mariotto
- Department of Computer Sciences, University of Verona, I-37134 Verona, Italy
| | - Marco Giarola
- Centre for Technological Platform (CPT), University of Verona, I-37134 Verona, Italy
| | - Luca Nodari
- Institute of Condensed Matter Chemistry and Technologies for Energy, National Research Council (ICMATE-CNR), I-35127 Padova, Italy
| | - Marco Zanatta
- Department of Physics, University of Trento, I-38123 Trento, Italy
| | - Nicola Daldosso
- Department of Computer Sciences, University of Verona, I-37134 Verona, Italy
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3
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Papadopoulos AG, Tagiara NS, Stavrou E, Li F, Yang G, Kamitsos EI. Pressure-Induced Structural Transformations and Electronic Transitions in TeO 2 Glass by Raman Spectroscopy. J Phys Chem Lett 2023; 14:387-394. [PMID: 36622290 DOI: 10.1021/acs.jpclett.2c03612] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
TeO2 glass has been studied by Raman spectroscopy up to the record pressure of 70 GPa. The boson peak frequency ωb exhibits a decrease of the ∂ωb/∂P slope at 5-6 GPa and saturates above 30 GPa with a practically constant value up to 70 GPa. Experiment and theory indicate that pressures up to 20 GPa induce the transformation of single Te-O-Te bridges to double Te-O2-Te bridges, leading to a more compact structure, while Raman activity developing at higher pressures around 580 cm-1 signals the increase of Te coordination from 4- to 6-fold. Natural bond orbital analysis shows that double Te-O2-Te bridges favor the s → d transition and promote the increase of Te coordination through d2sp3 hybridization. This transition leads to the formation of TeO6 octahedra, in strict difference with crystalline TeO2 at the same pressure range, and to the development of a 3D network that freezes the medium range order.
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Affiliation(s)
- Anastasios G Papadopoulos
- Theoretical and Physical Chemistry Institute, National Hellenic Research Foundation, 48 Vassileos Constantinou Avenue, 116 35Athens, Greece
| | - Nagia S Tagiara
- Theoretical and Physical Chemistry Institute, National Hellenic Research Foundation, 48 Vassileos Constantinou Avenue, 116 35Athens, Greece
| | - Elissaios Stavrou
- Materials Science and Engineering Program, Guangdong Technion-Israel Institute of Technology, Shantou, Guangdong515063, China
- Department of Materials Science and Engineering, Technion-Israel Institute of Technology, Haifa32000, Israel
| | - Fei Li
- State Key Laboratory of Metastable Materials Science & Technology and Key Laboratory for Microstructural Materials Physics of Hebei Province, School of Science, Yanshan University, Qinhuangdao066004, China
| | - Guochun Yang
- State Key Laboratory of Metastable Materials Science & Technology and Key Laboratory for Microstructural Materials Physics of Hebei Province, School of Science, Yanshan University, Qinhuangdao066004, China
| | - Efstratios I Kamitsos
- Theoretical and Physical Chemistry Institute, National Hellenic Research Foundation, 48 Vassileos Constantinou Avenue, 116 35Athens, Greece
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4
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González-Jiménez M, Barnard T, Russell BA, Tukachev NV, Javornik U, Hayes LA, Farrell AJ, Guinane S, Senn HM, Smith AJ, Wilding M, Mali G, Nakano M, Miyazaki Y, McMillan P, Sosso GC, Wynne K. Understanding the emergence of the boson peak in molecular glasses. Nat Commun 2023; 14:215. [PMID: 36639380 PMCID: PMC9839737 DOI: 10.1038/s41467-023-35878-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Accepted: 01/05/2023] [Indexed: 01/15/2023] Open
Abstract
A common feature of glasses is the "boson peak", observed as an excess in the heat capacity over the crystal or as an additional peak in the terahertz vibrational spectrum. The microscopic origins of this peak are not well understood; the emergence of locally ordered structures has been put forward as a possible candidate. Here, we show that depolarised Raman scattering in liquids consisting of highly symmetric molecules can be used to isolate the boson peak, allowing its detailed observation from the liquid into the glass. The boson peak in the vibrational spectrum matches the excess heat capacity. As the boson peak intensifies on cooling, wide-angle x-ray scattering shows the simultaneous appearance of a pre-peak due to molecular clusters consisting of circa 20 molecules. Atomistic molecular dynamics simulations indicate that these are caused by over-coordinated molecules. These findings represent an essential step toward our understanding of the physics of vitrification.
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Affiliation(s)
| | - Trent Barnard
- grid.7372.10000 0000 8809 1613Department of Chemistry, University of Warwick, Warwick, UK
| | - Ben A. Russell
- grid.8756.c0000 0001 2193 314XSchool of Chemistry, University of Glasgow, Glasgow, UK
| | - Nikita V. Tukachev
- grid.8756.c0000 0001 2193 314XSchool of Chemistry, University of Glasgow, Glasgow, UK
| | - Uroš Javornik
- grid.454324.00000 0001 0661 0844Slovenian NMR Centre, National Institute of Chemistry, Ljubljana, Slovenia
| | - Laure-Anne Hayes
- grid.8756.c0000 0001 2193 314XSchool of Chemistry, University of Glasgow, Glasgow, UK
| | - Andrew J. Farrell
- grid.8756.c0000 0001 2193 314XSchool of Chemistry, University of Glasgow, Glasgow, UK
| | - Sarah Guinane
- grid.8756.c0000 0001 2193 314XSchool of Chemistry, University of Glasgow, Glasgow, UK
| | - Hans M. Senn
- grid.8756.c0000 0001 2193 314XSchool of Chemistry, University of Glasgow, Glasgow, UK
| | - Andrew J. Smith
- grid.18785.330000 0004 1764 0696Diamond Light Source, Harwell Science and Innovation Campus, Harwell, UK
| | - Martin Wilding
- grid.5600.30000 0001 0807 5670School of Chemistry, University of Cardiff, Cardiff, UK
| | - Gregor Mali
- grid.454324.00000 0001 0661 0844Department of Inorganic Chemistry and Technology, National Institute of Chemistry, Ljubljana, Slovenia
| | - Motohiro Nakano
- grid.136593.b0000 0004 0373 3971Research Center for Thermal and Entropic Science, Osaka University, Osaka, Japan
| | - Yuji Miyazaki
- grid.136593.b0000 0004 0373 3971Research Center for Thermal and Entropic Science, Osaka University, Osaka, Japan
| | - Paul McMillan
- grid.83440.3b0000000121901201Department of Chemistry, University College London, London, UK
| | - Gabriele C. Sosso
- grid.7372.10000 0000 8809 1613Department of Chemistry, University of Warwick, Warwick, UK
| | - Klaas Wynne
- School of Chemistry, University of Glasgow, Glasgow, UK.
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5
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Extensive study on the optical and structural characteristics of Nd3+ doped Lead-Borate-Strontium-Tungsten glass system: Judd–Ofelt analysis. RESULTS IN CHEMISTRY 2023. [DOI: 10.1016/j.rechem.2023.100869] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/02/2023] Open
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6
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Benzine O, Pan Z, Calahoo C, Bockowski M, Smedskjaer MM, Schirmacher W, Wondraczek L. Vibrational disorder and densification-induced homogenization of local elasticity in silicate glasses. Sci Rep 2021; 11:24454. [PMID: 34961778 PMCID: PMC8712522 DOI: 10.1038/s41598-021-04045-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2021] [Accepted: 12/14/2021] [Indexed: 11/13/2022] Open
Abstract
We report the effect of structural compaction on the statistics of elastic disorder in a silicate glass, using heterogeneous elasticity theory with the coherent potential approximation (HET-CPA) and a log-normal distribution of the spatial fluctuations of the shear modulus. The object of our study, a soda lime magnesia silicate glass, is compacted by hot-compression up to 2 GPa (corresponding to a permanent densification of ~ 5%). Using THz vibrational spectroscopic data and bulk mechanical properties as inputs, HET-CPA evaluates the degree of disorder in terms of the length-scale of elastic fluctuations and the non-affine part of the shear modulus. Permanent densification decreases the extent of non-affine elasticity, resulting in a more homogeneous distribution of strain energy, while also decreasing the correlation length of elastic heterogeneity. Complementary 29Si magic angle spinning NMR spectroscopic data provide a short-range rationale for the effect of compression on glass structure in terms of a narrowing of the Si-O-Si bond-angle and the Si-Si distance.
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Affiliation(s)
- Omar Benzine
- Otto Schott Institute of Materials Research, University of Jena, 07743, Jena, Germany
| | - Zhiwen Pan
- Otto Schott Institute of Materials Research, University of Jena, 07743, Jena, Germany
| | - Courtney Calahoo
- Otto Schott Institute of Materials Research, University of Jena, 07743, Jena, Germany
| | - Michal Bockowski
- Institute of High-Pressure Physics, Polish Academy of Sciences, 01-142, Warsaw, Poland
| | - Morten M Smedskjaer
- Department of Chemistry and Bioscience, Aalborg University, 9220, Aalborg, Denmark
| | | | - Lothar Wondraczek
- Otto Schott Institute of Materials Research, University of Jena, 07743, Jena, Germany.
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7
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Mori T, Jiang Y, Fujii Y, Kitani S, Mizuno H, Koreeda A, Motoji L, Tokoro H, Shiraki K, Yamamoto Y, Kojima S. Detection of boson peak and fractal dynamics of disordered systems using terahertz spectroscopy. Phys Rev E 2020; 102:022502. [PMID: 32942491 DOI: 10.1103/physreve.102.022502] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2020] [Accepted: 08/10/2020] [Indexed: 06/11/2023]
Abstract
The boson peak is a largely unexplained excitation found universally in the terahertz vibrational spectra of disordered systems; the so-called fracton is a vibrational excitation associated with the self-similar structure of monomers in polymeric glasses. We demonstrate that such excitations can be detected using terahertz spectroscopy. In the case of fractal structures, we determine the infrared light-vibration coupling coefficient for the fracton region and show that information concerning the fractal and fracton dimensions appears in the exponent of the absorption coefficient. Finally, using terahertz time-domain spectroscopy and low-frequency Raman scattering, we experimentally observe these universal excitations in a protein (lysozyme) system that has an intrinsically disordered and fractal structure and argue that the system should be considered a single supramolecule. These findings are applicable to amorphous and fractal objects in general and will be valuable for understanding universal dynamics of disordered systems via terahertz light.
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Affiliation(s)
- Tatsuya Mori
- Division of Materials Science, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8573, Japan
| | - Yue Jiang
- Division of Materials Science, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8573, Japan
| | - Yasuhiro Fujii
- Department of Physical Sciences, Ritsumeikan University, 1-1-1 Noji-higashi, Kusatsu, Shiga 525-8577, Japan
| | - Suguru Kitani
- Laboratory for Materials and Structures, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama 226-8503, Japan
| | - Hideyuki Mizuno
- Graduate School of Arts and Sciences, The University of Tokyo, Tokyo 153-8902, Japan
| | - Akitoshi Koreeda
- Department of Physical Sciences, Ritsumeikan University, 1-1-1 Noji-higashi, Kusatsu, Shiga 525-8577, Japan
| | - Leona Motoji
- Division of Materials Science, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8573, Japan
| | - Hiroko Tokoro
- Division of Materials Science, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8573, Japan
| | - Kentaro Shiraki
- Division of Materials Science, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8573, Japan
| | - Yohei Yamamoto
- Division of Materials Science, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8573, Japan
| | - Seiji Kojima
- Division of Materials Science, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8573, Japan
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8
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Benzine O, Bruns S, Pan Z, Durst K, Wondraczek L. Local Deformation of Glasses is Mediated by Rigidity Fluctuation on Nanometer Scale. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2018; 5:1800916. [PMID: 30356973 PMCID: PMC6193166 DOI: 10.1002/advs.201800916] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2018] [Revised: 07/23/2018] [Indexed: 05/06/2023]
Abstract
Microscopic deformation processes determine defect formation on glass surfaces and, thus, the material's resistance to mechanical failure. While the macroscopic strength of most glasses is not directly dependent on material composition, local deformation and flaw initiation are strongly affected by chemistry and atomic arrangement. Aside from empirical insight, however, the structural origin of the fundamental deformation modes remains largely unknown. Experimental methods that probe parameters on short or intermediate length-scale such as atom-atom or superstructural correlations are typically applied in the absence of alternatives. Drawing on recent experimental advances, spatially resolved Raman spectroscopy is now used in the THz-gap for mapping local changes in the low-frequency vibrational density of states. From direct observation of deformation-induced variations on the characteristic length-scale of molecular heterogeneity, it is revealed that rigidity fluctuation mediates the deformation process of inorganic glasses. Molecular field approximations, which are based solely on the observation of short-range (interatomic) interactions, fail in the prediction of mechanical behavior. Instead, glasses appear to respond to local mechanical contact in a way that is similar to that of granular media with high intergranular cohesion.
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Affiliation(s)
- Omar Benzine
- Otto Schott Institute of Materials ResearchUniversity of JenaFraunhoferstrasse 607743JenaGermany
| | - Sebastian Bruns
- Department of Materials SciencePhysical MetallurgyTechnical University of DarmstadtAlarich‐Weiss‐Straße 264287DarmstadtGermany
| | - Zhiwen Pan
- Otto Schott Institute of Materials ResearchUniversity of JenaFraunhoferstrasse 607743JenaGermany
| | - Karsten Durst
- Department of Materials SciencePhysical MetallurgyTechnical University of DarmstadtAlarich‐Weiss‐Straße 264287DarmstadtGermany
| | - Lothar Wondraczek
- Otto Schott Institute of Materials ResearchUniversity of JenaFraunhoferstrasse 607743JenaGermany
- Abbe Center of PhotonicsUniversity of JenaAlbert‐Einstein‐Strasse 607745JenaGermany
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9
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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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10
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Baldi G, Benassi P, Fontana A, Giugni A, Monaco G, Nardone M, Rossi F. Damping of vibrational excitations in glasses at terahertz frequency: The case of 3-methylpentane. J Chem Phys 2017; 147:164501. [PMID: 29096506 DOI: 10.1063/1.4998696] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We report a compared analysis of inelastic X ray scattering (IXS) and of low frequency Raman data of glassy 3-methylpentane. The IXS spectra have been analysed allowing for the existence of two distinct excitations at each scattering wavevector obtaining a consistent interpretation of the spectra. In particular, this procedure allows us to interpret the linewidth of the modes in terms of a simple model which relates them to the width of the first sharp diffraction peak in the static structure factor. In this model, the width of the modes arises from the blurring of the dispersion curves which increases approaching the boundary of the first pseudo-Brillouin zone. The position of the boson peak contribution to the density of vibrational states derived from the Raman scattering measurements is in agreement with the interpretation of the two excitations in terms of a longitudinal mode and a transverse mode, the latter being a result of the mixed character of the transverse modes away from the center of the pseudo-Brillouin zone.
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Affiliation(s)
- Giacomo Baldi
- Dipartimento di Fisica, Università di Trento, 38050 Povo, Trento, Italy
| | - Paola Benassi
- Dipartimento di Scienze Fisiche e Chimiche, Università degli Studi dell'Aquila, 67100 L'Aquila, Italy
| | - Aldo Fontana
- Dipartimento di Fisica, Università di Trento, 38050 Povo, Trento, Italy
| | - Andrea Giugni
- PSE and BESE Divisions, King Abdullah University of Science and Technology, Thuwal 23955-6900, Saudi Arabia
| | - Giulio Monaco
- Dipartimento di Fisica, Università di Trento, 38050 Povo, Trento, Italy
| | - Michele Nardone
- Dipartimento di Scienze Fisiche e Chimiche, Università degli Studi dell'Aquila, 67100 L'Aquila, Italy
| | - Flavio Rossi
- Dipartimento di Fisica, Università di Trento, 38050 Povo, Trento, Italy
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11
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Ishikawa MS, Lima TA, Ferreira FF, Martinho HS. Unusual specific heat of almost dry L-cysteine and L-cystine amino acids. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2015; 91:032709. [PMID: 25871146 DOI: 10.1103/physreve.91.032709] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2014] [Indexed: 06/04/2023]
Abstract
A detailed quantitative analysis of the specific heat in the 0.5- to 200-K temperature range for almost dry L-cysteine and its dimer, L-cystine, amino acids is presented. We report the occurrence of a sharp first-order transition at ∼76 K for L-cysteine associated with the thiol group ordering which was successfully modeled with the two-dimensional Ising model. We demonstrated that quantum rotors, two-level systems (TLS), Einstein oscillators, and acoustic phonons (the Debye model) are essential ingredients to correctly describe the overall experimental data. Our analysis pointed out the absence of the TLS contribution to the low temperature specific heat of L-cysteine. This result was similar to that found in other noncrystalline amorphous materials, e.g., amorphous silicon, low density amorphous water, and ultrastable glasses. L-cystine presented an unusual nonlinear acoustic dispersion relation ω(q)=vq0.95 and a Maxwell-Boltzmann-type distribution of tunneling barriers. The presence of Einstein oscillators with ΘE∼70 K was common in both systems and adequately modeled the boson peak contributions.
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Affiliation(s)
- M S Ishikawa
- Centro de Ciências Naturais e Humanas, Universidade Federal do ABC, Avenida dos Estados, 5001, Santo André-SP, BR-09210-580, Brazil
| | - T A Lima
- Centro de Ciências Naturais e Humanas, Universidade Federal do ABC, Avenida dos Estados, 5001, Santo André-SP, BR-09210-580, Brazil
| | - F F Ferreira
- Centro de Ciências Naturais e Humanas, Universidade Federal do ABC, Avenida dos Estados, 5001, Santo André-SP, BR-09210-580, Brazil
| | - H S Martinho
- Centro de Ciências Naturais e Humanas, Universidade Federal do ABC, Avenida dos Estados, 5001, Santo André-SP, BR-09210-580, Brazil
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12
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Lin J, Li YQ. Ultralow frequency Stokes and anti-Stokes Raman spectroscopy of single living cells and microparticles using a hot rubidium vapor filter. OPTICS LETTERS 2014; 39:108-110. [PMID: 24365834 DOI: 10.1364/ol.39.000108] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
We report on ultralow frequency Stokes and anti-Stokes Raman spectroscopy of single living cells and microsized particles in an aqueous medium with a frequency shift down to 10 cm(-1) by the combination of a hot rubidium (Rb) vapor filter, a confocal pinhole, and optical trapping. A single frequency-stabilized diode laser beam at 780.2 nm is used to optically trap and excite a single living cell or microparticle, and the Rayleigh scattering light from the particle is effectively blocked with a Rb vapor cell and a confocal pinhole. Ultralow frequency Raman spectra of the trapped cells or microparticles in both Stokes and anti-Stokes regions are then measured with a single-stage CCD spectrograph.
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13
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Corezzi S, Caponi S, Rossi F, Fioretto D. Stress-Induced Modification of the Boson Peak Scaling Behavior. J Phys Chem B 2013; 117:14477-85. [DOI: 10.1021/jp4054742] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Silvia Corezzi
- Dipartimento
di Fisica, Universitá di Perugia, Via A. Pascoli, Perugia 06123, Italy
| | - Silvia Caponi
- Dipartimento
di Fisica, Universitá di Trento, Via Sommarive 14, Povo (Trento) 38123, Italy
- IOM-CNR
c/o Dipartimento di Fisica, Universitá di Perugia, Via A. Pascoli, Perugia 06123, Italy
| | - Flavio Rossi
- Dipartimento
di Fisica, Universitá di Trento, Via Sommarive 14, Povo (Trento) 38123, Italy
| | - Daniele Fioretto
- Dipartimento
di Fisica, Universitá di Perugia, Via A. Pascoli, Perugia 06123, Italy
- Centro
di Eccellenza sui Materiali Innovativi Nanostrutturati (CEMIN), Universitá di Perugia, via Elce di Sotto 8, Perugia 06123, Italy
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14
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Acoustic-like dynamics of amorphous drugs in the THz regime. Sci Rep 2013; 3:2518. [PMID: 23989304 PMCID: PMC3757359 DOI: 10.1038/srep02518] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2013] [Accepted: 08/09/2013] [Indexed: 11/08/2022] Open
Abstract
The high frequency dynamics of Indomethacin and Celecoxib glasses has been investigated by inelastic x-ray scattering, accessing a momentum-energy region still unexplored in amorphous pharmaceuticals. We find evidence of phonon-like acoustic dynamics, and determine the THz behavior of sound velocity and acoustic attenuation. Connections with ordinary sound propagation are discussed, along with the relation between fast and slow degrees of freedom as represented by non-ergodicity factor and kinetic fragility, respectively.
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15
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Marruzzo A, Schirmacher W, Fratalocchi A, Ruocco G. Heterogeneous shear elasticity of glasses: the origin of the boson peak. Sci Rep 2013; 3:1407. [PMID: 23470597 PMCID: PMC3591752 DOI: 10.1038/srep01407] [Citation(s) in RCA: 75] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2012] [Accepted: 02/19/2013] [Indexed: 11/09/2022] Open
Abstract
The local elasticity of glasses is known to be inhomogeneous on a microscopic scale compared to that of crystalline materials. Their vibrational spectrum strongly deviates from that expected from Debye's elasticity theory: The density of states deviates from Debye's law, the sound velocity shows a negative dispersion in the boson-peak frequency regime and there is a strong increase of the sound attenuation near the boson-peak frequency. By comparing a mean-field theory of shear-elastic heterogeneity with a large-scale simulation of a soft-sphere glass we demonstrate that the observed anomalies in glasses are caused by elastic heterogeneity. By observing that the macroscopic bulk modulus is frequency independent we show that the boson-peak-related vibrational anomalies are predominantly due to the spatially fluctuating microscopic shear stresses. It is demonstrated that the boson-peak arises from the steep increase of the sound attenuation at a frequency which marks the transition from wave-like excitations to disorder-dominated ones.
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Affiliation(s)
- Alessia Marruzzo
- Dipartimento di Fisica, Universitá di Roma La Sapienza, Roma, Italy
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16
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Petzold N, Schmidtke B, Kahlau R, Bock D, Meier R, Micko B, Kruk D, Rössler EA. Evolution of the dynamic susceptibility in molecular glass formers: Results from light scattering, dielectric spectroscopy, and NMR. J Chem Phys 2013; 138:12A510. [DOI: 10.1063/1.4770055] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
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17
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Probing the different spatial scales of Kel F-800 polymeric glass under pressure. Sci Rep 2013; 3:1290. [PMID: 23411501 PMCID: PMC3573337 DOI: 10.1038/srep01290] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2012] [Accepted: 01/21/2013] [Indexed: 11/08/2022] Open
Abstract
One of the fundamental open questions in condensed matter science is the origin of the unique universal characteristics of glasses. Among them, the Boson peak (BP) and the first sharp diffraction peak (FSDP) are directly related with the disordered nature of these solids. The lack of widely accepted understanding of the origin of these features makes the characterization of glass forming systems on the microscopic level challenging. Moreover a strong and open debate exists on the possible correlation between BP and FSDP and its origin. Here we present the first detailed concomitant Raman and x-ray diffraction study of these two features under hydrostatic pressure. Surprisingly, we find that the previously proposed correlations between the positions of BP and FSDP do not hold under pressure. Based on the anticorrelation of the characteristic dimensions, we conclude that, BP and FSDP probe different spatial scales corresponding to dynamical and structural dimensions, respectively.
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18
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Rossi B, Caponi S, Castiglione F, Corezzi S, Fontana A, Giarola M, Mariotto G, Mele A, Petrillo C, Trotta F, Viliani G. Networking Properties of Cyclodextrin-Based Cross-Linked Polymers Probed by Inelastic Light-Scattering Experiments. J Phys Chem B 2012; 116:5323-7. [DOI: 10.1021/jp302047u] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Barbara Rossi
- Dipartimento di Fisica, Università di Trento, Via Sommarive 14, I-38123
Povo, Trento (Italy)
| | - Silvia Caponi
- Dipartimento di Fisica, Università di Trento, Via Sommarive 14, I-38123
Povo, Trento (Italy)
- Istituto
di Biofisica, Consiglio Nazionale delle Ricerche, via alla Cascata
56/C, I-38123 Trento (Italy)
| | - Franca Castiglione
- Dipartimento di Chimica, Materiali
e Ingegneria Chimica “G. Natta”, Politecnico di Milano, Piazza L. Da Vinci 32, I-20133 Milano (Italy)
| | - Silvia Corezzi
- Dipartimento di Fisica, Università di Perugia, Via Pascoli, I-06123
Perugia (Italy)
| | - Aldo Fontana
- Dipartimento di Fisica, Università di Trento, Via Sommarive 14, I-38123
Povo, Trento (Italy)
| | - Marco Giarola
- Dipartimento
di Informatica, Università di Verona, Strada le Grazie 15, I-37134
Verona (Italy)
| | - Gino Mariotto
- Dipartimento
di Informatica, Università di Verona, Strada le Grazie 15, I-37134
Verona (Italy)
| | - Andrea Mele
- Dipartimento di Chimica, Materiali
e Ingegneria Chimica “G. Natta”, Politecnico di Milano, Piazza L. Da Vinci 32, I-20133 Milano (Italy)
| | - Caterina Petrillo
- Istituto
di Biofisica, Consiglio Nazionale delle Ricerche, via alla Cascata
56/C, I-38123 Trento (Italy)
- Dipartimento di Fisica, Università di Perugia, Via Pascoli, I-06123
Perugia (Italy)
| | - Francesco Trotta
- Dipartimento di
Chimica IFM, Università di Torino, Via Pietro Giuria 7, I-10125
Torino (Italy)
| | - Gabriele Viliani
- Dipartimento di Fisica, Università di Trento, Via Sommarive 14, I-38123
Povo, Trento (Italy)
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19
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Zanatta M, Baldi G, Caponi S, Fontana A, Petrillo C, Rossi F, Sacchetti F. Debye to non-Debye scaling of the Boson peak dynamics: Critical behavior and local disorder in vitreous germania. J Chem Phys 2011; 135:174506. [DOI: 10.1063/1.3656697] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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20
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Rovigatti L, Kob W, Sciortino F. The vibrational density of states of a disordered gel model. J Chem Phys 2011; 135:104502. [DOI: 10.1063/1.3626869] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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21
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Deschamps T, Martinet C, de Ligny D, Bruneel JL, Champagnon B. Correlation between boson peak and anomalous elastic behavior in GeO2 glass: An in situ Raman scattering study under high-pressure. J Chem Phys 2011; 134:234503. [PMID: 21702563 DOI: 10.1063/1.3599939] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- T Deschamps
- Laboratoire de Physico-Chimie des Matériaux Luminescents, Domaine scientifique de la Doua, Université de Lyon, Université Lyon-1, UMR5620 CNRS, Bât. Kastler, 10 rue Ada Byron, 69622 Villeurbanne, France.
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22
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Stavrou E, Tsiantos C, Tsopouridou RD, Kripotou S, Kontos AG, Raptis C, Capoen B, Bouazaoui M, Turrell S, Khatir S. Raman scattering boson peak and differential scanning calorimetry studies of the glass transition in tellurium-zinc oxide glasses. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2010; 22:195103. [PMID: 21386447 DOI: 10.1088/0953-8984/22/19/195103] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Raman scattering and differential scanning calorimetry (DSC) measurements have been carried out on four mixed tellurium-zinc oxide (TeO(2))(1 - x)(ZnO)(x) (x = 0.1, 0.2, 0.3, 0.4) glasses under variable temperature, with particular attention being given to the respective glass transition region. From the DSC measurements, the glass transition temperature T(g) has been determined for each glass, showing a monotonous decrease of T(g) with increasing ZnO content. The Raman study is focused on the low-frequency band of the glasses, the so-called boson peak (BP), whose frequency undergoes an abrupt decrease at a temperature T(d) very close to the respective T(g) values obtained by DSC. These results show that the BP is highly sensitive to dynamical effects over the glass transition and provides a means for an equally reliable (to DSC) determination of T(g) in tellurite glasses and other network glasses. The discontinuous temperature dependence of the BP frequency at the glass transition, along with the absence of such a behaviour by the high-frequency Raman bands (due to local atomic vibrations), indicates that marked changes of the medium range order (MRO) occur at T(g) and confirms the correlation between the BP and the MRO of glasses.
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Affiliation(s)
- E Stavrou
- Department of Physics, National Technical University of Athens, Athens, Greece
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23
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Novikov VN, Duval E. Comment on "Raman scattering and the low-frequency vibrational spectrum of glasses". PHYSICAL REVIEW LETTERS 2009; 103:169701-169702. [PMID: 19905731 DOI: 10.1103/physrevlett.103.169701] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2008] [Indexed: 05/28/2023]
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24
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Pérez-Madrid A, Lapas LC, Rubí JM. Heat exchange between two interacting nanoparticles beyond the fluctuation-dissipation regime. PHYSICAL REVIEW LETTERS 2009; 103:048301. [PMID: 19659404 DOI: 10.1103/physrevlett.103.048301] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2008] [Indexed: 05/28/2023]
Abstract
We show that the observed nonmonotonic behavior of the thermal conductance between two nanoparticles when they are brought into contact is originated by an intricate phase space dynamics. Here it is assumed that this dynamics results from the thermally activated jumping through a rough energy landscape. A hierarchy of relaxation times plays the key role in the description of this complex phase space behavior. Our theory enables us to analyze the heat transfer just before and at the moment of contact.
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Affiliation(s)
- Agustin Pérez-Madrid
- Departament de Física Fonamental, Facultat de Física, Universitat de Barcelona, 08028 Barcelona, Spain.
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25
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Caponi S, Corezzi S, Fioretto D, Fontana A, Monaco G, Rossi F. Raman-scattering measurements of the vibrational density of states of a reactive mixture during polymerization: effect on the boson peak. PHYSICAL REVIEW LETTERS 2009; 102:027402. [PMID: 19257317 DOI: 10.1103/physrevlett.102.027402] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2008] [Revised: 10/07/2008] [Indexed: 05/27/2023]
Abstract
Raman-scattering measurements are used to follow the modification of the vibrational density of states in a reactive epoxy-amine mixture during isothermal polymerization. Combining them with Brillouin light and inelastic x-ray scattering measurements, we analyze the variations of the boson peak and of the Debye level while the system changes from liquid to glass upon increasing the number of covalent bonds among the constituent molecules. The shift and intensity variation of the boson peak are explained by the modification of the elastic properties throughout the reaction, and a master curve for the boson peak can therefore be obtained. Surprisingly, bond-induced modifications of the structure do not affect this master curve.
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Affiliation(s)
- S Caponi
- Dipartimento di Fisica, Università di Trento, Via Sommarive 14, I-38050 Povo (Trento), Italy
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26
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Kulik LV, Rapatsky LL, Pivtsov AV, Surovtsev NV, Adichtchev SV, Grigor’ev IA, Dzuba SA. Electron-nuclear double resonance study of molecular librations of nitroxides in molecular glasses: Quantum effects at low temperatures, comparison with low-frequency Raman scattering. J Chem Phys 2009; 131:064505. [DOI: 10.1063/1.3206909] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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