1
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Ngai KL. Origin of ργ/ T scaling of primary and secondary conductivity relaxation times in mixture of water with protic ionic liquid. Phys Chem Chem Phys 2024. [PMID: 39118411 DOI: 10.1039/d4cp01959h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/10/2024]
Abstract
Murali et al. [J. Phys. Chem. Lett., 2024, 15, 3376-3382] made ambient and high pressure dielectric measurements of a supercooled aqueous mixture of an acidic ionic liquid to find the presence of the primary (σ) conductivity relaxation together with the secondary (ν) conductivity relaxation originating from the water clusters confined by the cations and anions with relaxation times τσ and τν respectively. From the isothermal and isobaric conductivity relaxation data found on varying thermodynamic conditions (i.e. T and P) at constant τσ are the invariance of (i) the frequency dispersion or the Kohlrausch function exponent (1 - n) of the primary conductivity relaxation, and (ii) the ratio of the primary and secondary conductivity times, τσ/τν. This co-invariance of τσ, τν, and (1 - n) at constant τσ was observed before in non-aqueous ionic liquids, but it is found for the first time in aqueous ionic liquids. The new data together with PVT measurements enable Murali et al. to show additionally that both τσ and τν are functions of ργ/T with a single exponent γ = 0.58. The Coupling model is the only theory predicting the co-invariance of τσ, τν, and (1 - n) as well as the ργ/T scaling of both τσ and τν. It is applied herein to address and explain the data of the ionic liquid-water mixture.
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Affiliation(s)
- K L Ngai
- Institute for Chemical and Physical Processes (IPCF), Consiglio Nazionale delle Ricerche (CNR) Largo B, Pontecorvo 3, Pisa I-56127, Italy.
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2
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Murakami H, Kanahara Y, Sasaki K. Freezing of Water Solvation Dynamics in Nanoconfinement by Reverse Micelles at Room Temperature. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:13082-13091. [PMID: 38867455 DOI: 10.1021/acs.langmuir.4c00926] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2024]
Abstract
Much attention has recently been paid to anomalously low dielectric constants of nanoconfined water between two slabs at room temperature (Fumagalli et al. Science, 2018, 360, 1339). These low values imply that the dipole rotation of the interfacial water on the slab is completely suppressed. Such freezing has so far been observed for water confined between solids. In contrast, it remains unclear whether this holds for water in soft confinement, which is omnipresent naturally and artificially. Here, we address this question using encapsulated reverse micelles with a dye molecule, allowing us to study water sandwiched between the surfactant and dye molecules in solution. Moreover, we examine the solvation related to the dielectric property of water, which is reorientational motion in the hydration layer of the dye molecule, by persistent hole-burning spectroscopy. We first show that the dye molecule is surrounded by water without contact with the surfactant and that the dye molecule has two or three hydration layers on average. We next demonstrate that the solvation dynamics is frozen below the water droplet size of ∼4 nm, whereas they become liquid-like when the RM size is further increased. The average gap distance (∼1.5 nm) for freezing the solvation agrees with the gap distance with no rotational water motions between slabs. Our findings may have biological relevance, providing a new aspect for understanding biological function in cells.
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Affiliation(s)
- Hiroshi Murakami
- Institute for Quantum Life Science, National Institutes for Quantum Science and Technology (QST), Kyoto 619-0215, Japan
| | - Yuko Kanahara
- Faculty of Human Life and Environment, Nara Women's University, Nara 630-8506, Japan
| | - Kaito Sasaki
- Department of Physics, School of Science, and Micro/Nano Technology Center, Tokai University, Kanagawa 259-1292, Japan
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3
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Ruiz-Matus S, Goldstein P. On the universality of viscosity in supersaturated binary aqueous sugar solutions: Cryopreservation by vitrification. Cryobiology 2024; 115:104886. [PMID: 38555011 DOI: 10.1016/j.cryobiol.2024.104886] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2024] [Revised: 03/07/2024] [Accepted: 03/14/2024] [Indexed: 04/02/2024]
Abstract
Nowadays, the physical nature of supersaturated binary aqueous sugar solutions in the vicinity of the glass transition represents a very important issue due to their biological applications in cryopreservation of cells and tissues, food science and stabilization and storage of nano genetic drugs. We present the construction of the Supplemented Phase Diagram and the non-equilibrium nature of the undersaturated-supersaturated kinetic transition. The description of its thermodynamic nature is achieved through the study of behavior of their viscosity as temperature is lowered and concentration increased. In this work, we find a universal character for the viscosities of several sugar water solutions.
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Affiliation(s)
- Soledad Ruiz-Matus
- Department of Physics, Faculty of Science, National Autonomous University of México, 04510, Coyoacán, Ciudad de México, Mexico.
| | - Patricia Goldstein
- Department of Physics, Faculty of Science, National Autonomous University of México, 04510, Coyoacán, Ciudad de México, Mexico.
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4
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Singh LP. Glass transition phenomena and dielectric relaxations in supercooled d-lyxose aqueous solutions. Carbohydr Res 2023; 532:108917. [PMID: 37572627 DOI: 10.1016/j.carres.2023.108917] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2023] [Revised: 07/30/2023] [Accepted: 08/02/2023] [Indexed: 08/14/2023]
Abstract
Differential scanning calorimeter and broadband dielectric spectroscopy in a broad range of temperatures (150-300 K) were employed to study the d-lyxose aqueous mixture at different hydration levels. Two relaxation processes were observed in all investigated d-lyxose aqueous mixtures. A relaxation process (process-I) usually known as the primary relaxation mode which is accountable for the collective motion of d-lyxose aqueous solution, was observed above the glass transition temperature (Tg). Below Tg, another process designated as process-II was found which is mainly related to the water molecule relaxation inside the d-lyxose matrix. The average relaxation times as a function of temperature and dielectric strengths of both observed relaxation processes (I & II) were analyzed for all hydration levels in d-lyxose. It was identified that the relaxation amplitude of process-II in the d-lyxose aqueous mixture was increased drastically and their activation energies were found to be approximately independent of the content of water above critical concentration, xc = 0.28. This suggests that the dynamical process observed above xc was dominated by the presence of water clusters. In the current aqueous mixture, the critical content of water (xc) is slightly higher as compared to previously reported aqueous mixtures, indicating a more cooperative nature of water molecules with a d-lyxose matrix. Additionally, the Tg of pure water was estimated at 128 ± 5.8 K from the extrapolation of DSC Tg data of the d-lyxose aqueous solution by using the well-known Gordon-Taylor equation. Our current result gives further support to the well-accepted glass transition (Tg) of pure water.
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Affiliation(s)
- Lokendra P Singh
- Department of Physics, Madanapalle Institute of Technology & Science, Madanapalle, 517325, Andhra Pradesh, India.
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5
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Sasaki K, Takatsuka M, Shinyashiki N, Ngai KL. Relating the dynamics of hydrated poly(vinyl pyrrolidone) to the dynamics of highly asymmetric mixtures and polymer blends. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.115907] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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6
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Liu Y, Yang M, Gao Y, Fan X, Zhao K. Broadband dielectric properties of honey: effects of temperature. JOURNAL OF FOOD SCIENCE AND TECHNOLOGY 2020; 57:1656-1660. [PMID: 32327776 DOI: 10.1007/s13197-019-04198-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Revised: 10/24/2019] [Accepted: 12/05/2019] [Indexed: 11/28/2022]
Abstract
Dielectric properties of jujube honey were investigated at 298-358 K by broadband dielectric measurements. Four relaxation processes were observed and analyzed, which are caused by long range correlation of density fluctuation, cooperative motions of molecules, rotational polarization of bound water and collective reorientation of free water, respectively. The results of temperature dependence of dielectric parameters show that with increasing temperature, the interaction among the molecules e.g. water, fructose and glucose molecules etc. weaken, and the honey gradually forms a complete sugar solution. At a given temperature, the penetration depth at 27 MHz is much greater than that at 915 MHz and 2.45 GHz. And based on the calculated penetration depth, dielectric heating at 27 MHz seems to has more advantages for large volume of materials.
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Affiliation(s)
- Yuan Liu
- College of Chemistry, Beijing Normal University, Beijing, 100875 China
| | - Man Yang
- College of Chemistry, Beijing Normal University, Beijing, 100875 China
| | - Yanyan Gao
- College of Chemistry, Beijing Normal University, Beijing, 100875 China
| | - Xiaoqing Fan
- College of Chemistry, Beijing Normal University, Beijing, 100875 China
| | - Kongshuang Zhao
- College of Chemistry, Beijing Normal University, Beijing, 100875 China
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7
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Zhang Y, Nichman L, Spencer P, Jung JI, Lee A, Heffernan BK, Gold A, Zhang Z, Chen Y, Canagaratna MR, Jayne JT, Worsnop DR, Onasch TB, Surratt JD, Chandler D, Davidovits P, Kolb CE. The Cooling Rate- and Volatility-Dependent Glass-Forming Properties of Organic Aerosols Measured by Broadband Dielectric Spectroscopy. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2019; 53:12366-12378. [PMID: 31490675 DOI: 10.1021/acs.est.9b03317] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Glass transitions of secondary organic aerosols (SOA) from liquid/semisolid to solid phase states have important implications for aerosol reactivity, growth, and cloud formation properties. In the present study, glass transition temperatures (Tg) of isoprene SOA components, including isoprene hydroxy hydroperoxide (ISOPOOH), isoprene-derived epoxydiols (IEPOX), 2-methyltetrols, and 2-methyltetrol sulfates, were measured at atmospherically relevant cooling rates (2-10 K/min) by thin film broadband dielectric spectroscopy. The results indicate that 2-methyltetrol sulfates have the highest glass transition temperature, while ISOPOOH has the lowest glass transition temperature. By varying the cooling rate of the same compound from 2 to 10 K/min, the Tg of these compounds increased by 4-5 K. This temperature difference leads to a height difference of 400-800 m in the atmosphere for the corresponding updraft induced cooling rates, assuming a hygroscopicity value (κ) of 0.1 and relative humidity less than 95%. The Tg of the organic compounds was found to be strongly correlated with volatility, and a semiempirical formula between glass transition temperatures and volatility was derived. The Gordon-Taylor equation was applied to calculate the effect of relative humidity (RH) and water content at five mixing ratios on the Tg of organic aerosols. The model shows that Tg could drop by 15-40 K as the RH changes from <5 to 90%, whereas the mixing ratio of water in the particle increases from 0 to 0.5. These results underscore the importance of chemical composition, updraft rates, and water content (RH) in determining the phase states and hygroscopic properties of organic particles.
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Affiliation(s)
- Yue Zhang
- Department of Chemistry , Boston College , Chestnut Hill , Massachusetts 02459 , United States
- Aerodyne Research Inc. , Billerica , Massachusetts 01821 , United States
- Department of Environmental Sciences and Engineering, Gillings School of Global Public Health , University of North Carolina at Chapel Hill , Chapel Hill , North Carolina 27599 , United States
| | - Leonid Nichman
- Department of Chemistry , Boston College , Chestnut Hill , Massachusetts 02459 , United States
| | - Peyton Spencer
- Department of Chemistry , Boston College , Chestnut Hill , Massachusetts 02459 , United States
| | - Jason I Jung
- Department of Chemistry , Boston College , Chestnut Hill , Massachusetts 02459 , United States
| | - Andrew Lee
- Department of Chemistry , Boston College , Chestnut Hill , Massachusetts 02459 , United States
| | - Brian K Heffernan
- Department of Chemistry , Boston College , Chestnut Hill , Massachusetts 02459 , United States
| | - Avram Gold
- Department of Environmental Sciences and Engineering, Gillings School of Global Public Health , University of North Carolina at Chapel Hill , Chapel Hill , North Carolina 27599 , United States
| | - Zhenfa Zhang
- Department of Environmental Sciences and Engineering, Gillings School of Global Public Health , University of North Carolina at Chapel Hill , Chapel Hill , North Carolina 27599 , United States
| | - Yuzhi Chen
- Department of Environmental Sciences and Engineering, Gillings School of Global Public Health , University of North Carolina at Chapel Hill , Chapel Hill , North Carolina 27599 , United States
| | | | - John T Jayne
- Aerodyne Research Inc. , Billerica , Massachusetts 01821 , United States
| | - Douglas R Worsnop
- Aerodyne Research Inc. , Billerica , Massachusetts 01821 , United States
| | - Timothy B Onasch
- Department of Chemistry , Boston College , Chestnut Hill , Massachusetts 02459 , United States
- Aerodyne Research Inc. , Billerica , Massachusetts 01821 , United States
| | - Jason D Surratt
- Department of Environmental Sciences and Engineering, Gillings School of Global Public Health , University of North Carolina at Chapel Hill , Chapel Hill , North Carolina 27599 , United States
| | - David Chandler
- Department of Chemistry , University of California, Berkeley , Berkeley , California 94720 , United States
| | - Paul Davidovits
- Department of Chemistry , Boston College , Chestnut Hill , Massachusetts 02459 , United States
| | - Charles E Kolb
- Aerodyne Research Inc. , Billerica , Massachusetts 01821 , United States
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8
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Capaccioli S, Ngai KL, Ancherbak S, Bertoldo M, Ciampalini G, Thayyil MS, Wang LM. The JG β-relaxation in water and impact on the dynamics of aqueous mixtures and hydrated biomolecules. J Chem Phys 2019; 151:034504. [DOI: 10.1063/1.5100835] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- S. Capaccioli
- CNR-IPCF, Dipartimento di Fisica, Largo Bruno Pontecorvo 3, I-56127, Pisa, Italy
- Dipartimento di Fisica, Università di Pisa, Largo Bruno Pontecorvo 3, I-56127, Pisa, Italy
| | - K. L. Ngai
- CNR-IPCF, Dipartimento di Fisica, Largo Bruno Pontecorvo 3, I-56127, Pisa, Italy
- State Key Lab of Metastable Materials Science and Technology, and College of Materials Science and Engineering, Yanshan University, Qinhuangdao, Hebei, 066004, China
| | - S. Ancherbak
- Dipartimento di Fisica, Università di Pisa, Largo Bruno Pontecorvo 3, I-56127, Pisa, Italy
| | - M. Bertoldo
- ISOF - CNR Area della Ricerca di Bologna, Via P. Gobetti 101, 40129 Bologna, Italy
| | - G. Ciampalini
- Dipartimento di Fisica, Università di Pisa, Largo Bruno Pontecorvo 3, I-56127, Pisa, Italy
| | | | - Li-Min Wang
- State Key Lab of Metastable Materials Science and Technology, and College of Materials Science and Engineering, Yanshan University, Qinhuangdao, Hebei, 066004, China
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9
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Torres FG, Arroyo J, Alvarez R, Rodriguez S, Troncoso O, López D. Molecular dynamics of carboxymethyl κ/ι-hybrid carrageenan films doped with NH4I. POLYM-PLAST TECH MAT 2018. [DOI: 10.1080/03602559.2018.1542713] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Fernando G. Torres
- Department of Mechanical Engineering, Pontificia Universidad Católica del Perú (Lima 32 Perú), Lima, Perú
| | - Junior Arroyo
- Department of Mechanical Engineering, Pontificia Universidad Católica del Perú (Lima 32 Perú), Lima, Perú
| | - Ricardo Alvarez
- Department of Mechanical Engineering, Pontificia Universidad Católica del Perú (Lima 32 Perú), Lima, Perú
| | - Sol Rodriguez
- Department of Mechanical Engineering, Pontificia Universidad Católica del Perú (Lima 32 Perú), Lima, Perú
| | - Omar Troncoso
- Department of Mechanical Engineering, Pontificia Universidad Católica del Perú (Lima 32 Perú), Lima, Perú
| | - Daniel López
- Institute of Polymer Science and Technology, Spanish Council for Scientific Research (ICTP-CSIC), Madrid, Spain
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10
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Sritham E, Gunasekaran S. Enthalpy relaxation in sucrose-maltodextrin-sodium citrate bioglass. J FOOD ENG 2017. [DOI: 10.1016/j.jfoodeng.2017.04.032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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11
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Zhavoronok ES, Senchikhin IN, Roldughin VI. Physical aging and relaxation processes in epoxy systems. POLYMER SCIENCE SERIES A 2017. [DOI: 10.1134/s0965545x17020109] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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12
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HIGUCHI K, SASAKI K, IWANO A, MORITA K, SHINYASHIKI N, OKAMURA Y, NAGASE Y. Mechanical Properties and Dielectric Relaxation Behavior of Segmented Polyurethanes Containing Phosphorylcholine Groups. KOBUNSHI RONBUNSHU 2017. [DOI: 10.1295/koron.2017-0021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Koji HIGUCHI
- Graduate School of Engineering, Tokai University
| | - Kaito SASAKI
- Graduate School of Science and Technology, Tokai University
- Micro·Nano Research & Development Center, Tokai University
| | | | - Kohei MORITA
- Graduate School of Engineering, Tokai University
| | - Naoki SHINYASHIKI
- Graduate School of Science and Technology, Tokai University
- Graduate School of Science, Tokai University
| | - Yosuke OKAMURA
- Graduate School of Engineering, Tokai University
- Micro·Nano Research & Development Center, Tokai University
| | - Yu NAGASE
- Graduate School of Engineering, Tokai University
- Graduate School of Science and Technology, Tokai University
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13
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Sasaki K, Panagopoulou A, Kita R, Shinyashiki N, Yagihara S, Kyritsis A, Pissis P. Dynamics of Uncrystallized Water, Ice, and Hydrated Protein in Partially Crystallized Gelatin–Water Mixtures Studied by Broadband Dielectric Spectroscopy. J Phys Chem B 2016; 121:265-272. [DOI: 10.1021/acs.jpcb.6b04756] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Kaito Sasaki
- Department of Physics,
Graduate School of Science, Tokai University, 4-1-1 Kitakaname, Hiratuka-shi, Kanagawa, Japan
- Micro/Nano Technology Center, Tokai University, 4-1-1
Kitakaname, Hiratuka-shi, Kanagawa, Japan
| | - Anna Panagopoulou
- Department of Physics, National Technical University of Athens, Zografou Campus, 15780 Athens, Greece
| | - Rio Kita
- Department of Physics,
Graduate School of Science, Tokai University, 4-1-1 Kitakaname, Hiratuka-shi, Kanagawa, Japan
- Micro/Nano Technology Center, Tokai University, 4-1-1
Kitakaname, Hiratuka-shi, Kanagawa, Japan
| | - Naoki Shinyashiki
- Department of Physics,
Graduate School of Science, Tokai University, 4-1-1 Kitakaname, Hiratuka-shi, Kanagawa, Japan
| | - Shin Yagihara
- Department of Physics,
Graduate School of Science, Tokai University, 4-1-1 Kitakaname, Hiratuka-shi, Kanagawa, Japan
| | - Apostolos Kyritsis
- Department of Physics, National Technical University of Athens, Zografou Campus, 15780 Athens, Greece
| | - Polycarpos Pissis
- Department of Physics, National Technical University of Athens, Zografou Campus, 15780 Athens, Greece
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14
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Flores-Tapia D, Rodriguez D, Solis M, Kopotun N, Latif S, Maizlish O, Fu L, Gui Y, Hu CM, Pistorius S. Experimental feasibility of multistatic holography for breast microwave radar image reconstruction. Med Phys 2016; 43:4674. [PMID: 27487884 DOI: 10.1118/1.4953636] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
PURPOSE The goal of this study was to assess the experimental feasibility of circular multistatic holography, a novel breast microwave radar reconstruction approach, using experimental datasets recorded using a preclinical experimental setup. The performance of this approach was quantitatively evaluated by calculating the signal to clutter ratio (SCR), contrast to clutter ratio (CCR), tumor to fibroglandular response ratio (TFRR), spatial accuracy, and reconstruction time. METHODS Five datasets were recorded using synthetic phantoms with the dielectric properties of breast tissue in the 1-6 GHz range using a custom radar system developed by the authors. The datasets contained synthetic structures that mimic the dielectric properties of fibroglandular breast tissues. Four of these datasets the authors covered an 8 mm inclusion that emulated a tumor. A custom microwave radar system developed at the University of Manitoba was used to record the radar responses from the phantoms. The datasets were reconstructed using the proposed multistatic approach as well as with a monostatic holography approach that has been previously shown to yield the images with the highest contrast and focal quality. RESULTS For all reconstructions, the location of the synthetic tumors in the experimental setup was consistent with the position in the both the monostatic and multistatic reconstructed images. The average spatial error was less than 4 mm, which is half the spatial resolution of the data acquisition system. The average SCR, CCR, and TFRR of the images reconstructed with the multistatic approach were 15.0, 9.4, and 10.0 dB, respectively. In comparison, monostatic images obtained using the datasets from the same experimental setups yielded average SCR, CCR, and TFRR values of 12.8, 4.9, and 5.9 dB. No artifacts, defined as responses generated by the reconstruction method of at least half the energy of the tumor signatures, were noted in the multistatic reconstructions. The average execution time of the images formed using the proposed approach was 4 s, which is one order of magnitude faster than the current state-of-the-art time-domain multistatic breast microwave radar reconstruction algorithms. CONCLUSIONS The images generated by the proposed method show that multistatic holography is capable of forming spatially accurate images in real-time with signal to clutter levels and contrast values higher than other published monostatic and multistatic cylindrical radar reconstruction approaches. In comparison to the monostatic holographic approach, the images generated by the proposed multistatic approach had SCR values that were at least 50% higher. The multistatic images had CCR and TFRR values at least 200% greater than those formed using a monostatic approach.
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Affiliation(s)
- Daniel Flores-Tapia
- Department of Physics and Astronomy, University of Manitoba, Winnipeg, Manitoba R3T 2N2, Canada
| | - Diego Rodriguez
- Department of Physics and Astronomy, University of Manitoba, Winnipeg, Manitoba R3T 2N2, Canada
| | - Mario Solis
- Biomedical Engineering Graduate Program, University of Manitoba, Winnipeg, Manitoba R3T 5V6, Canada
| | - Nikita Kopotun
- Department of Electrical and Computer Engineering, Queen's University, Kingston, Ontario K7L 3N6, Canada
| | - Saeed Latif
- Department of Electrical and Computer Engineering, University of South Alabama, Mobile, Alabama 36688
| | | | - Lei Fu
- Department of Physics and Astronomy, University of Manitoba, Winnipeg, Manitoba R3T 2N2, Canada
| | - Yonsheng Gui
- Department of Physics and Astronomy, University of Manitoba, Winnipeg, Manitoba R3T 2N2, Canada
| | - Can-Ming Hu
- Department of Physics and Astronomy, University of Manitoba, Winnipeg, Manitoba R3T 2N2, Canada
| | - Stephen Pistorius
- Department of Physics and Astronomy, University of Manitoba, Winnipeg, Manitoba R3T 2N2, Canada; Biomedical Engineering Graduate Program, University of Manitoba, Winnipeg, Manitoba R3T 5V6, Canada; CancerCare Manitoba, Winnipeg, Manitoba R3E 0V9, Canada; and Department of Radiology, University of Manitoba, Winnipeg, Manitoba R3A 1R9, Canada
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15
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Sasaki K, Matsui Y, Miyara M, Kita R, Shinyashiki N, Yagihara S. Glass Transition and Dynamics of the Polymer and Water in the Poly(vinylpyrrolidone)–Water Mixtures Studied by Dielectric Relaxation Spectroscopy. J Phys Chem B 2016; 120:6882-9. [DOI: 10.1021/acs.jpcb.6b05347] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Kaito Sasaki
- Department of Physics, School
of Science, Tokai University, 4-1-1 Kitakaname, Hiratsuka-shi, Kanagawa 259-1292, Japan
| | - Yurika Matsui
- Department of Physics, School
of Science, Tokai University, 4-1-1 Kitakaname, Hiratsuka-shi, Kanagawa 259-1292, Japan
| | - Masahiko Miyara
- Department of Physics, School
of Science, Tokai University, 4-1-1 Kitakaname, Hiratsuka-shi, Kanagawa 259-1292, Japan
| | - Rio Kita
- Department of Physics, School
of Science, Tokai University, 4-1-1 Kitakaname, Hiratsuka-shi, Kanagawa 259-1292, Japan
| | - Naoki Shinyashiki
- Department of Physics, School
of Science, Tokai University, 4-1-1 Kitakaname, Hiratsuka-shi, Kanagawa 259-1292, Japan
| | - Shin Yagihara
- Department of Physics, School
of Science, Tokai University, 4-1-1 Kitakaname, Hiratsuka-shi, Kanagawa 259-1292, Japan
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16
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Constantin JG, Schneider M, Corti HR. Glass Transition Temperature of Saccharide Aqueous Solutions Estimated with the Free Volume/Percolation Model. J Phys Chem B 2016; 120:5047-55. [PMID: 27176640 DOI: 10.1021/acs.jpcb.6b01841] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The glass transition temperature of trehalose, sucrose, glucose, and fructose aqueous solutions has been predicted as a function of the water content by using the free volume/percolation model (FVPM). This model only requires the molar volume of water in the liquid and supercooled regimes, the molar volumes of the hypothetical pure liquid sugars at temperatures below their pure glass transition temperatures, and the molar volumes of the mixtures at the glass transition temperature. The model is simplified by assuming that the excess thermal expansion coefficient is negligible for saccharide-water mixtures, and this ideal FVPM becomes identical to the Gordon-Taylor model. It was found that the behavior of the water molar volume in trehalose-water mixtures at low temperatures can be obtained by assuming that the FVPM holds for this mixture. The temperature dependence of the water molar volume in the supercooled region of interest seems to be compatible with the recent hypothesis on the existence of two structure of liquid water, being the high density liquid water the state of water in the sugar solutions. The idealized FVPM describes the measured glass transition temperature of sucrose, glucose, and fructose aqueous solutions, with much better accuracy than both the Gordon-Taylor model based on an empirical kGT constant dependent on the saccharide glass transition temperature and the Couchman-Karasz model using experimental heat capacity changes of the components at the glass transition temperature. Thus, FVPM seems to be an excellent tool to predict the glass transition temperature of other aqueous saccharides and polyols solutions by resorting to volumetric information easily available.
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Affiliation(s)
- Julian Gelman Constantin
- Instituto de Química Física de los Materiales, Ambiente y Energía (INQUIMAE), Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Intendente Güiraldes 2160 - Ciudad Universitaria , C1428EGA Buenos Aires, Argentina
| | - Matthias Schneider
- Instituto de Química Física de los Materiales, Ambiente y Energía (INQUIMAE), Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Intendente Güiraldes 2160 - Ciudad Universitaria , C1428EGA Buenos Aires, Argentina
| | - Horacio R Corti
- Instituto de Química Física de los Materiales, Ambiente y Energía (INQUIMAE), Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Intendente Güiraldes 2160 - Ciudad Universitaria , C1428EGA Buenos Aires, Argentina.,Departamento de Física de la Materia Condensada, Centro Atómico Constituyentes, Comisión Nacional de Energía Atómica , Av. General Paz 1499, San Martin, 1650 Buenos Aires, Argentina
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Ngai KL, Capaccioli S, Paciaroni A. Dynamics of hydrated proteins and bio-protectants: Caged dynamics, β-relaxation, and α-relaxation. Biochim Biophys Acta Gen Subj 2016; 1861:3553-3563. [PMID: 27155356 DOI: 10.1016/j.bbagen.2016.04.027] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2016] [Revised: 04/26/2016] [Accepted: 04/27/2016] [Indexed: 10/21/2022]
Abstract
BACKGROUND The properties of the three dynamic processes, α-relaxation, ν-relaxation, and caged dynamics in aqueous mixtures and hydrated proteins are analogous to corresponding processes found in van der Waals and polymeric glass-formers apart from minor differences. METHODS Collection of various experimental data enables us to characterize the structural α-relaxation of the protein coupled to hydration water (HW), the secondary or ν-relaxation of HW, and the caged HW process. RESULTS From the T-dependence of the ν-relaxation time of hydrated myoglobin, lysozyme, and bovine serum albumin, we obtain Ton at which it enters the experimental time windows of Mössbauer and neutron scattering spectroscopies, coinciding with protein dynamical transition (PDT) temperature Td. However, for all systems considered, the α-relaxation time at Ton or Td is many orders of magnitude longer. The other step change of the mean-square-displacement (MSD) at Tg_alpha originates from the coupling of the nearly constant loss (NCL) of caged HW to density. The coupling of the NCL to density is further demonstrated by another step change at the secondary glass temperature Tg_beta in two bio-protectants, trehalose and sucrose. CONCLUSIONS The structural α-relaxation plays no role in PDT. Since PDT is simply due to the ν-relaxation of HW, the term PDT is a misnomer. NCL of caged dynamics is coupled to density and show transitions at lower temperature, Tg_beta and Tg_alpha. GENERAL SIGNIFICANCE The so-called protein dynamical transition (PDT) of hydrated proteins is not caused by the structural α-relaxation of the protein but by the secondary ν-relaxation of hydration water. "This article is part of a Special Issue entitled "Science for Life" Guest Editor: Dr. Austen Angell, Dr. Salvatore Magazù and Dr. Federica Migliardo".
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Affiliation(s)
- K L Ngai
- CNR-IPCF, Largo Bruno Pontecorvo 3, I-56127 Pisa, Italy.
| | - S Capaccioli
- CNR-IPCF, Largo Bruno Pontecorvo 3, I-56127 Pisa, Italy; Dipartimento di Fisica, Università di Pisa, Largo Bruno Pontecorvo 3, I-56127 Pisa, Italy
| | - A Paciaroni
- Dipartimento di Fisica, Università degli Studi di Perugia, Via A Pascoli 1, 06123 Perugia, Italy
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18
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Segmental mobility and glass transition of poly(ethylene-vinyl acetate) copolymers: Is there a continuum in the dynamic glass transitions from PVAc to PE? POLYMER 2015. [DOI: 10.1016/j.polymer.2015.09.007] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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19
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Li X, Wang M, Liu R, Ngai KL, Tian Y, Wang LM, Capaccioli S. Secondary relaxation dynamics in rigid glass-forming molecular liquids with related structures. J Chem Phys 2015; 143:104505. [DOI: 10.1063/1.4930262] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Xiangqian Li
- State Key Lab of Metastable Materials Science and Technology, and College of Materials Science and Engineering, Yanshan University, Qinhuangdao, Hebei 066004, China
| | - Meng Wang
- State Key Lab of Metastable Materials Science and Technology, and College of Materials Science and Engineering, Yanshan University, Qinhuangdao, Hebei 066004, China
| | - Riping Liu
- State Key Lab of Metastable Materials Science and Technology, and College of Materials Science and Engineering, Yanshan University, Qinhuangdao, Hebei 066004, China
| | - Kia L. Ngai
- State Key Lab of Metastable Materials Science and Technology, and College of Materials Science and Engineering, Yanshan University, Qinhuangdao, Hebei 066004, China
- CNR-IPCF, Largo B. Pontecorvo 3, I-56127 Pisa, Italy
| | - Yongjun Tian
- State Key Lab of Metastable Materials Science and Technology, and College of Materials Science and Engineering, Yanshan University, Qinhuangdao, Hebei 066004, China
| | - Li-Min Wang
- State Key Lab of Metastable Materials Science and Technology, and College of Materials Science and Engineering, Yanshan University, Qinhuangdao, Hebei 066004, China
| | - Simone Capaccioli
- CNR-IPCF, Largo B. Pontecorvo 3, I-56127 Pisa, Italy
- Dipartimento di Fisica, Università di Pisa, I-56127 Pisa, Italy
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20
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Viciosa MT, Santos G, Costa A, Danède F, Branco LC, Jordão N, Correia NT, Dionísio M. Dipolar motions and ionic conduction in an ibuprofen derived ionic liquid. Phys Chem Chem Phys 2015; 17:24108-20. [PMID: 26315452 DOI: 10.1039/c5cp03715h] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
It was demonstrated that the combination of the almost water insoluble active pharmaceutical ingredient (API) ibuprofen with the biocompatible 1-ethanol-3-methylimidazolium [C2OHMIM] cation of an ionic liquid (IL) leads to a highly water miscible IL-API with a solubility increased by around 5 orders of magnitude. Its phase transformations, as crystallization and glass transition, are highly sensitive to the water content, the latter shifting to higher temperatures upon dehydration. By dielectric relaxation spectroscopy the dynamical behavior of anhydrous [C2OHMIM][Ibu] and with 18.5 and 3% of water content (w/w) was probed from well below the calorimetric glass transition (Tg) up to the liquid state. Multiple reorientational dipolar processes were detected which become strongly affected by conductivity and electrode polarization near above Tg. Therefore [C2OHMIM][Ibu] exhibits mixed behavior of a conventional molecular glass former and an ionic conductor being analysed in this work through conductivity, electrical modulus and complex permittivity. The dominant process, σα-process, originates by a coupling between both charge transport and dipolar mechanisms. The structural relaxation times were derived from permittivity analysis and confirmed by temperature modulated differential scanning calorimetry. The temperature dependence of the β-secondary relaxation is coherent with a Johari-Goldstein (βJG) process as detected in conventional glass formers.
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Affiliation(s)
- M T Viciosa
- CQFM - Centro de Química-Física Molecular and IN - Institute of Nanoscience and Nanotechnology, Instituto Superior Técnico, Universidade de Lisboa, Avenida Rovisco Pais, 1049-001 Lisboa, Portugal.
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21
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Yamamoto W, Sasaki K, Kita R, Yagihara S, Shinyashiki N. Dielectric study on temperature–concentration superposition of liquid to glass in fructose–water mixtures. J Mol Liq 2015. [DOI: 10.1016/j.molliq.2015.01.057] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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22
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Sasaki K, Kita R, Shinyashiki N, Yagihara S. Glass transition of partially crystallized gelatin-water mixtures studied by broadband dielectric spectroscopy. J Chem Phys 2014; 140:124506. [DOI: 10.1063/1.4869346] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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23
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Cerveny S, Swenson J. Dynamics of supercooled water in a biological model system of the amino acid l-lysine. Phys Chem Chem Phys 2014; 16:22382-90. [DOI: 10.1039/c4cp02487g] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Lysine solutions establish a new relaxation behaviour of supercooled interfacial water.
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Affiliation(s)
- Silvina Cerveny
- Centro de Física de Materiales-Material Physics Centre (MPC)
- CSIC-Universidad del País Vasco (UPV/EHU)
- San Sebastian, Spain
- Donostia International Physics Center
- San Sebastián, Spain
| | - Jan Swenson
- Department of Applied Physics
- Chalmers University of Technology
- SE-412 96 Göteborg, Sweden
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24
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Kishikawa Y, Seki Y, Shingai K, Kita R, Shinyashiki N, Yagihara S. Dielectric Relaxation for Studying Molecular Dynamics of Pullulan in Water. J Phys Chem B 2013; 117:9034-41. [DOI: 10.1021/jp403606r] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yuki Kishikawa
- Department of Physics, Tokai University, Hiratsuka, Kanagawa 259-1292, Japan
| | - Yuki Seki
- Department of Physics, Tokai University, Hiratsuka, Kanagawa 259-1292, Japan
| | - Kou Shingai
- Department of Physics, Tokai University, Hiratsuka, Kanagawa 259-1292, Japan
| | - Rio Kita
- Department of Physics, Tokai University, Hiratsuka, Kanagawa 259-1292, Japan
| | - Naoki Shinyashiki
- Department of Physics, Tokai University, Hiratsuka, Kanagawa 259-1292, Japan
| | - Shin Yagihara
- Department of Physics, Tokai University, Hiratsuka, Kanagawa 259-1292, Japan
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25
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Ngai KL, Capaccioli S, Paciaroni A. Change of caged dynamics at Tg in hydrated proteins: Trend of mean squared displacements after correcting for the methyl-group rotation contribution. J Chem Phys 2013; 138:235102. [DOI: 10.1063/1.4810752] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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26
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Harnkarnsujarit N, Charoenrein S, Roos YH. Porosity and Water Activity Effects on Stability of Crystalline β-Carotene in Freeze-Dried Solids. J Food Sci 2012; 77:E313-20. [DOI: 10.1111/j.1750-3841.2012.02940.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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27
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Pagnotta SE, Alegría A, Colmenero J. Dynamical behavior of highly concentrated trehalose water solutions: a dielectric spectroscopy study. Phys Chem Chem Phys 2012; 14:2991-6. [DOI: 10.1039/c2cp22402j] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Singh LP, Cerveny S, Alegría A, Colmenero J. Broadband dielectric spectroscopic, calorimetric, and FTIR-ATR investigations of D-arabinose aqueous solutions. Chemphyschem 2011; 12:3624-33. [PMID: 22095698 DOI: 10.1002/cphc.201100469] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2011] [Indexed: 11/06/2022]
Abstract
The dielectric relaxation behavior of D-arabinose aqueous solutions at different water concentrations is examined by broadband dielectric spectroscopy in the frequency range of 10(-2) -10(7) Hz and in the temperature range of 120-300 K. Differential scanning calorimetry is also performed to find the glass transition temperatures (T(g)). In addition, the same solutions are analyzed by Fourier transform infrared (FTIR) spectroscopy using the attenuated total reflectance (ATR) method at the same temperature interval and in the frequency range of 3800-2800 cm(-1). The temperature dependence of the relaxation times is examined for the different weight fractions (x(w)) of water along with the temperature dependence of dielectric strength. Two relaxation processes are observed in the aqueous solutions for all concentrations of water. The slower process, the so-called primary relaxation process (process-I), is responsible for the T(g) whereas the faster one (designated as process-II) is due to the reorientational motion of the water molecules. As for other hydrophilic water solutions, dielectric data for process-II indicate the existence of a critical water concentration above which water mobility is less restricted. Accordingly, FTIR-ATR measurements on aqueous solutions show an increment in the intensity (area) of the O-H stretching sub-band close to 3200 cm(-1) as the water concentration increases.
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Affiliation(s)
- Lokendra P Singh
- Donostia International Physics Center, Paseo Manuel de Lardizabal 4, 20018 San Sebastian, Spain.
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29
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Kyritsis A, Spanoudaki A, Pandis C, Hartmann L, Pelster R, Shinyashiki N, Rodríguez Hernández J, Gómez Ribelles J, Monleón Pradas M, Pissis P. Water and polymer dynamics in poly(hydroxyl ethyl acrylate-co-ethyl acrylate) copolymer hydrogels. Eur Polym J 2011. [DOI: 10.1016/j.eurpolymj.2011.09.025] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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30
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Flores-Tapia D, Pistorius S. Real time breast microwave radar image reconstruction using circular holography: a study of experimental feasibility. Med Phys 2011; 38:5420-31. [PMID: 21992361 DOI: 10.1118/1.3633922] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
PURPOSE The purpose of this paper is to assess the experimental feasibility of a novel breast microwave radar reconstruction approach, circular holography, using realistic experimental datasets recorded using a preclinical experimental setup. The performance of this approach was quantitatively evaluated by calculating the signal to noise ratio, contrast to noise ratio, spatial accuracy, and reconstruction time. METHODS Six datasets were recorded, three corresponding to fatty cases and three containing synthetic dense tissue structures. Five of these datasets contained an 8 mm inclusion that emulated a malignant lesion. The data were acquired from synthetic phantoms that mimic the dielectric properties of breast tissues in the 1-6 GHz range using a custom experimental breast microwave radar system. The spatial accuracy and signal to noise ratio of the reconstructed was calculated for all the reconstructed images. The contrast to noise ratio of the reconstructed images corresponding to the datasets containing fibroglandular tissue regions was determined. This was done to evaluate the ability of the circular holographic method to provide images in which the responses from tumors can be distinguished from adjacent dense tissue structures. The execution time required to form the images was also measured to evaluate the data throughput of the holographic approach. RESULTS For all the reconstructed datasets, the location of the synthetic tumors in the experimental setup was consistent with its position in the reconstructed image. The average spatial error was 2.2 mm, which is less than half the spatial resolution of the data acquisition system. The average signal to noise ratio of the reconstructed images containing an artificial malignant lesion was 8.5 dB, while the average contrast to noise ratio was 6.7 dB. The reconstructed images presented no artifacts. The average execution time of the images formed using the proposed approach was 5 ms, which is six orders of magnitude faster than current state of the art breast microwave radar (BMR) reconstruction algorithms. CONCLUSIONS The results show that circular holography is capable of forming accurate images with signal to noise levels higher than 8 dB in quasi real time. Compared to BMR reconstruction algorithms tested on datasets containing dense tissue structures, the holographic approach generated images of similar spatial accuracy with higher signal to noise ratios and an acceleration factor of one order of magnitude.
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31
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Silalai N, Roos YH. Coupling of dielectric and mechanical relaxations with glass transition and stickiness of milk solids. J FOOD ENG 2011. [DOI: 10.1016/j.jfoodeng.2011.01.009] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Kwon HJ, Seo JA, Kim HK, Hwang YH. Study of dielectric relaxations of anhydrous trehalose and maltose glasses. J Chem Phys 2011; 134:014508. [DOI: 10.1063/1.3517217] [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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34
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Correia NT, Diogo HP, Moura Ramos JJ. Slow Molecular Mobility in the Amorphous Solid State of Fructose: Fragility and Aging. J Food Sci 2009; 74:E526-33. [PMID: 20492115 DOI: 10.1111/j.1750-3841.2009.01363.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Natália T Correia
- REQUIMTE, Depart. de Química, Faculdade de Ciências e Tecnologia da Univ. Nova de Lisboa, 2829-516 Caparica, Portugal
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35
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Pagnotta SE, Cerveny S, Alegría A, Colmenero J. Dielectric relaxations in ribose and deoxyribose supercooled water solutions. J Chem Phys 2009; 131:085102. [DOI: 10.1063/1.3202215] [Citation(s) in RCA: 18] [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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