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Mizuno Y, Zhao Y, Akiba H, Kohara S, Ohara K, Tucker MG, McDonnell MT, Yamamuro O. Intermolecular correlations of liquid and glassy CS2 studied by synchrotron radiation x-ray diffraction. J Chem Phys 2022; 156:034503. [DOI: 10.1063/5.0073210] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Yuki Mizuno
- Neutron Science Laboratory, Institute for Solid State Physics, University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8581, Japan
- Japan Synchrotron Radiation Research Institute (JASRI), 1-1-1, Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198, Japan
| | - Yuansheng Zhao
- Neutron Science Laboratory, Institute for Solid State Physics, University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8581, Japan
| | - Hiroshi Akiba
- Neutron Science Laboratory, Institute for Solid State Physics, University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8581, Japan
| | - Shinji Kohara
- National Institute for Materials Science (NIMS), 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan
| | - Koji Ohara
- Japan Synchrotron Radiation Research Institute (JASRI), 1-1-1, Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198, Japan
| | - Matthew G. Tucker
- Oak Ridge National Laboratory (ORNL), 1 Bethel Valley Road, Oak Ridge, Tennessee 37830, USA
| | - Marshall T. McDonnell
- Oak Ridge National Laboratory (ORNL), 1 Bethel Valley Road, Oak Ridge, Tennessee 37830, USA
| | - Osamu Yamamuro
- Neutron Science Laboratory, Institute for Solid State Physics, University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8581, Japan
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Gautam S, Kolesnikov AI, Rother G, Dai S, Qiao ZA, Cole D. Effects of Confinement and Pressure on the Vibrational Behavior of Nano-Confined Propane. J Phys Chem A 2018; 122:6736-6745. [PMID: 30040898 DOI: 10.1021/acs.jpca.8b05028] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Fluids confined in nanopores exhibit significant deviations in their structure and dynamics from the bulk behavior. Although phase, structural, and diffusive behaviors of confined fluids have been investigated and reported extensively, confinement effects on the vibrational properties are less understood. We study the vibrational behavior of propane confined in 1.5 nm nanopores of MCM-41-S using inelastic neutron scattering (INS) and molecular dynamics (MD) simulations. Vibrational spectra have been obtained from INS data as functions of temperature and pressure. At ambient pressure, a strong quasielastic signal observed in the INS spectrum at 80 K suggests that confined propane remains liquid below the bulk phase melting point of 85 K. The quasielastic signal is heavily suppressed when either the pressure is increased to 1 kbar or the temperature is lowered to 30 K, indicating solidification of pore-confined propane. Confinement in MCM-41-S pores results in a glass-like state of propane that exhibits a relatively featureless low-energy vibrational spectrum compared to that of the bulk crystalline propane. Increasing the pressure to 3 kbar results in hardening of the intermolecular and methyl torsional modes. The INS data are used for estimating the isochoric specific heat of confined propane, which is compared with the specific heat of bulk propane reported in literature. Data from MD simulations are used to calculate the vibrational power spectra that agree qualitatively with the experimental data. Simulation data also suggest a reduction of the structural ordering (positional, orientational, and intramolecular) of propane under confinement.
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Affiliation(s)
- Siddharth Gautam
- School of Earth Sciences , The Ohio State University , Columbus , 43210 , Ohio United States
| | | | | | | | - Zhen-An Qiao
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry , Jilin University , Changchun 130012 , China
| | - David Cole
- School of Earth Sciences , The Ohio State University , Columbus , 43210 , Ohio United States
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Kofu M, Inamura Y, Moriya Y, Podlesnyak A, Ehlers G, Yamamuro O. Inelastic neutron scattering study on boson peaks of imidazolium-based ionic liquids. J Mol Liq 2015. [DOI: 10.1016/j.molliq.2015.07.021] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Tatsumi S, Aso S, Yamamuro O. Thermodynamic study of simple molecular glasses: universal features in their heat capacity and the size of the cooperatively rearranging regions. PHYSICAL REVIEW LETTERS 2012; 109:045701. [PMID: 23006098 DOI: 10.1103/physrevlett.109.045701] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2011] [Indexed: 06/01/2023]
Abstract
We have obtained some universal thermodynamic properties on glass transitions of molecular liquids. The heat capacity C(p) of glassy propene, which was vitrified by using a vapor-deposition technique, was measured with a newly developed adiabatic calorimeter. Propene has the lowest glass transition temperature (T(g)=56 K), the largest C(p) jump at T(g) (C(p)(lq)/C(p)(gl)~2.5), and the lowest residual entropy (S(res)~Rln2) compared with glass-forming molecules measured before. We have analyzed the present data with other hydrocarbon molecules vitrified by liquid quenching and obtained the following results: (1) The excess heat capacities are scaled well by using a Kauzmann temperature T(K), (2) The size of the cooperative rearrangement region (CRR) frozen at T(g) increases with decreasing the temperature difference between T(g) and T(K) (Kauzmann temperature), and (3) The simpler the molecule is, the larger the frozen CRR becomes. These are all supporting the validity of the Adam-Gibbs theory.
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Affiliation(s)
- Soichi Tatsumi
- Neutron Science Laboratory, Institute for Solid State Physics, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8581, Japan.
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Ding Y, Novikov VN, Sokolov AP, A. Cailliaux,, Dalle-Ferrier C, Alba-Simionesco C, Frick B. Influence of Molecular Weight on Fast Dynamics and Fragility of Polymers. Macromolecules 2004. [DOI: 10.1021/ma0492420] [Citation(s) in RCA: 84] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | | | | | | | | | | | - B. Frick
- Institute Laue Langevin, 38042 Grenoble, France
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Chumakov AI, Sergueev I, van Bürck U, Schirmacher W, Asthalter T, Rüffer R, Leupold O, Petry W. Collective nature of the boson peak and universal transboson dynamics of glasses. PHYSICAL REVIEW LETTERS 2004; 92:245508. [PMID: 15245100 DOI: 10.1103/physrevlett.92.245508] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2003] [Indexed: 05/24/2023]
Abstract
Using probe molecules with resonant nuclei and nuclear inelastic scattering, we are able to measure the density of states exclusively for collective motions with a correlation length of more than approximately 20 A. Such spectra exhibit an excess of low-energy modes (boson peak). This peak behaves in the same way as that observed by conventional methods. This shows that a significant part of the modes constituting the boson peak is of collective character. At energies above the boson peak, the reduced density of states of the collective motions universally exhibits an exponential decrease.
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Affiliation(s)
- A I Chumakov
- European Synchrotron Radiation Facility, P.O. Box 220, F-38043 Grenoble, France
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Madokoro Y, Yamamuro O, Yamasaki H, Matsuo T, Tsukushi I, Kamiyama T, Ikeda S. Calorimetric and neutron scattering studies on the boson peak of lithium chloride aqueous solution glasses. J Chem Phys 2002. [DOI: 10.1063/1.1454992] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Yamamuro O, Madokoro Y, Yamasaki H, Matsuo T, Tsukushi I, Takeda K. Low-energy excitations of vapor-deposited amorphous ice and its annealing and methanol-doping effects studied by inelastic neutron scattering. J Chem Phys 2001. [DOI: 10.1063/1.1413963] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Kanaya T, Kaji K. Dynamics in the Glassy State and Near the Glass Transition of Amorphous Polymers as Studied by Neutron Scattering. POLYMER PHYSICS AND ENGINEERING 2001. [DOI: 10.1007/3-540-44484-x_2] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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Lindqvist A, Yamamuro O, Tsukushi I, Matsuo T. Excess heat capacities due to the low-energy excitations of molecular glasses: An approach using the soft potential model. J Chem Phys 1997. [DOI: 10.1063/1.474873] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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