1
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Maturi F, Raposo Filho RS, Brites CDS, Fan J, He R, Zhuang B, Liu X, Carlos LD. Deciphering Density Fluctuations in the Hydration Water of Brownian Nanoparticles via Upconversion Thermometry. J Phys Chem Lett 2024; 15:2606-2615. [PMID: 38420927 PMCID: PMC10926164 DOI: 10.1021/acs.jpclett.4c00044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2024] [Revised: 02/14/2024] [Accepted: 02/16/2024] [Indexed: 03/02/2024]
Abstract
We investigate the intricate relationship among temperature, pH, and Brownian velocity in a range of differently sized upconversion nanoparticles (UCNPs) dispersed in water. These UCNPs, acting as nanorulers, offer insights into assessing the relative proportion of high-density and low-density liquid in the surrounding hydration water. The study reveals a size-dependent reduction in the onset temperature of liquid-water fluctuations, indicating an augmented presence of high-density liquid domains at the nanoparticle surfaces. The observed upper-temperature threshold is consistent with a hypothetical phase diagram of water, validating the two-state model. Moreover, an increase in pH disrupts the organization of water molecules, similar to external pressure effects, allowing simulation of the effects of temperature and pressure on hydrogen bonding networks. The findings underscore the significance of the surface of suspended nanoparticles for understanding high- to low-density liquid fluctuations and water behavior at charged interfaces.
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Affiliation(s)
- Fernando
E. Maturi
- Phantom-g,
CICECO - Aveiro Institute of Materials, Department of Physics, University of Aveiro, 3810-193 Aveiro, Portugal
- Institute
of Chemistry, São Paulo State University
(UNESP), 14800-060 Araraquara, SP, Brazil
| | - Ramon S. Raposo Filho
- Phantom-g,
CICECO - Aveiro Institute of Materials, Department of Physics, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Carlos D. S. Brites
- Phantom-g,
CICECO - Aveiro Institute of Materials, Department of Physics, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Jingyue Fan
- Department
of Chemistry, National University of Singapore, Singapore 117543
| | - Ruihua He
- Department
of Chemistry, National University of Singapore, Singapore 117543
| | - Bilin Zhuang
- Harvey
Mudd College, 301 Platt
Boulevard, Claremont, California 91711, United States
| | - Xiaogang Liu
- Department
of Chemistry, National University of Singapore, Singapore 117543
| | - Luís D. Carlos
- Phantom-g,
CICECO - Aveiro Institute of Materials, Department of Physics, University of Aveiro, 3810-193 Aveiro, Portugal
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2
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The Hydrophobic Effect Studied by Using Interacting Colloidal Suspensions. Int J Mol Sci 2023; 24:ijms24032003. [PMID: 36768326 PMCID: PMC9916416 DOI: 10.3390/ijms24032003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2022] [Revised: 01/14/2023] [Accepted: 01/17/2023] [Indexed: 01/21/2023] Open
Abstract
Interactions between nanoparticles (NPs) determine their self-organization and dynamic processes. In these systems, a quantitative description of the interparticle forces is complicated by the presence of the hydrophobic effect (HE), treatable only qualitatively, and due to the competition between the hydrophobic and hydrophilic forces. Recently, instead, a sort of crossover of HE from hydrophilic to hydrophobic has been experimentally observed on a local scale, by increasing the temperature, in pure confined water and studying the occurrence of this crossover in different water-methanol solutions. Starting from these results, we then considered the idea of studying this process in different nanoparticle solutions. By using photon correlation spectroscopy (PCS) experiments on dendrimer with OH terminal groups (dissolved in water and methanol, respectively), we show the existence of this hydrophobic-hydrophilic crossover with a well defined temperature and nanoparticle volume fraction dependence. In this frame, we have used the mode coupling theory extended model to evaluate the measured time-dependent density correlation functions (ISFs). In this context we will, therefore, show how the measured spectra are strongly dependent on the specificity of the interactions between the particles in solution. The observed transition demonstrates that just the HE, depending sensitively on the system thermodynamics, determines the hydrophobic and hydrophilic interaction properties of the studied nanostructures surface.
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3
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Camisasca G, Tenuzzo L, Gallo P. Protein hydration water: focus on low density and high density local structures upon cooling. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.120962] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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4
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Sepulveda-Medina PI, Wang C, Li R, Fukuto M, Vogt BD. Influence of the Nature of Aliphatic Hydrophobic Physical Crosslinks on Water Crystallization in Copolymer Hydrogels. J Phys Chem B 2022; 126:5544-5554. [PMID: 35833757 DOI: 10.1021/acs.jpcb.2c02438] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The local environment within a hydrogel influences the properties of water, including the propensity for ice crystallization. Water-swollen amphiphilic copolymers produce tunable nanoscale environments, which are defined by hydrophobic associations, for the water molecules. Here, the antifreeze properties for equilibrium-swollen amphiphilic copolymers with a common hydrophilic component, hydroxyethyl acrylate (HEA), but associated through crystalline (octadecyl acrylate, ODA) or rubbery (ethylhexyl acrylate, EHA) hydrophobic segments, are examined. Differences in the efficacy of the associations can be clearly enunciated from compositional solubility limits for the copolymers in water (<2.6 mol % ODA vs ≤14 mol % EHA), and these differences can be attributed to the strength of the association. The equilibrium-swollen HEA-ODA copolymers are viscoelastic solids, while the swollen HEA-EHA copolymers are viscoelastic liquids. Cooling these swollen copolymers to nearly 200 K induces some crystallization of the water, where the fraction of water frozen depends on the details of the nanostructure. Decreasing the mean free path of water by increasing the ODA composition from 10 to 25 mol % leads to fractionally more unfrozen water (66-87%). The swollen HEA-EHA copolymers only marginally inhibit ice (<13%) except with 45 mol % EHA, where nearly 60% of the water remains amorphous on cooling to 200 K. In general, the addition of the EHA leads to less effective ice inhibition than analogous covalently crosslinked HEA hydrogels (19.9 ± 1.8%). These results illustrate that fluidity of confining surfaces can provide pathways for critical nuclei to form and crystal growth to proceed.
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Affiliation(s)
- Pablo I Sepulveda-Medina
- School of Polymer Science and Polymer Engineering, University of Akron, Akron, Ohio 44325, United States
| | - Chao Wang
- School of Polymer Science and Polymer Engineering, University of Akron, Akron, Ohio 44325, United States
| | - Ruipeng Li
- National Synchrotron Light Source II, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Masafumi Fukuto
- National Synchrotron Light Source II, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Bryan D Vogt
- Department of Chemical Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
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5
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Atamas N, Gavryushenko D, Yablochkova K, Lazarenko M, Taranyik G. Temperature and temporal heterogeneities of water dynamics in the physiological temperature range. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.117201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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6
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Sepulveda-Medina PI, Tyagi M, Wang C, Vogt BD. Water dynamics within nanostructured amphiphilic statistical copolymers from quasielastic neutron scattering. J Chem Phys 2021; 154:154903. [PMID: 33887940 DOI: 10.1063/5.0045341] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Understanding the properties of water under either soft or hard confinement has been an area of great interest, but nanostructured amphiphilic polymers that provide a secondary confinement have garnered significantly less attention. Here, a series of statistical copolymers of 2-hydroxyethyl acrylate (HEA) and 2-(N-ethylperfluorooctane sulfonamido)ethyl methacrylate (FOSM) are swollen to equilibrium in water to form nanostructured physically cross-linked hydrogels to probe the effect of soft confinement on the dynamics of water. Changing the composition of the copolymer from 10 to 21 mol. % FOSM decreases the average size of the assembled FOSM cross-link, but also the spacing between the cross-links in the hydrogels with the mean distance between the FOSM aggregates decreasing from 3.9 to 2.7 nm. The dynamics of water within the hydrogels were assessed with quasielastic neutron scattering. These hydrogels exhibit superior performance for inhibition of water crystallization on supercooling in comparison to analogous hydrogels with different hydrophilic copolymer chemistries. Despite the lower water crystallinity, the self-diffusion coefficient for these hydrogels from the copolymers of HEA and FOSM decreases precipitously below 260 K, which is a counter to the nearly temperature invariant water dynamics reported previously with an analogous hydrogel [Wiener et al., J. Phys. Chem. B 120, 5543 (2016)] that exhibits nearly temperature invariant dynamics to 220 K. These results point to chemistry dependent dynamics of water that is confined within amphiphilic hydrogels, where the interactions of water with the hydrophilic segments can qualitatively alter the temperature dependent dynamics of water in the supercooled state.
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Affiliation(s)
| | - Madhusudan Tyagi
- Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA
| | - Chao Wang
- School of Polymer Science and Polymer Engineering, University of Akron, Akron, Ohio 44325, USA
| | - Bryan D Vogt
- School of Polymer Science and Polymer Engineering, University of Akron, Akron, Ohio 44325, USA
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7
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Jin J, Pak AJ, Han Y, Voth GA. A new one-site coarse-grained model for water: Bottom-up many-body projected water (BUMPer). II. Temperature transferability and structural properties at low temperature. J Chem Phys 2021; 154:044105. [PMID: 33514078 PMCID: PMC7826166 DOI: 10.1063/5.0026652] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2020] [Accepted: 12/14/2020] [Indexed: 11/14/2022] Open
Abstract
A number of studies have constructed coarse-grained (CG) models of water to understand its anomalous properties. Most of these properties emerge at low temperatures, and an accurate CG model needs to be applicable to these low-temperature ranges. However, direct use of CG models parameterized from other temperatures, e.g., room temperature, encounters a problem known as transferability, as the CG potential essentially follows the form of the many-body CG free energy function. Therefore, temperature-dependent changes to CG interactions must be accounted for. The collective behavior of water at low temperature is generally a many-body process, which often motivates the use of expensive many-body terms in the CG interactions. To surmount the aforementioned problems, we apply the Bottom-Up Many-Body Projected Water (BUMPer) CG model constructed from Paper I to study the low-temperature behavior of water. We report for the first time that the embedded three-body interaction enables BUMPer, despite its pairwise form, to capture the growth of ice at the ice/water interface with corroborating many-body correlations during the crystal growth. Furthermore, we propose temperature transferable BUMPer models that are indirectly constructed from the free energy decomposition scheme. Changes in CG interactions and corresponding structures are faithfully recapitulated by this framework. We further extend BUMPer to examine its ability to predict the structure, density, and diffusion anomalies by employing an alternative analysis based on structural correlations and pairwise potential forms to predict such anomalies. The presented analysis highlights the existence of these anomalies in the low-temperature regime and overcomes potential transferability problems.
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Affiliation(s)
- Jaehyeok Jin
- Department of Chemistry, Chicago Center for Theoretical Chemistry, Institute for Biophysical Dynamics, and James Franck Institute, The University of Chicago, Chicago, Illinois 60637, USA
| | - Alexander J. Pak
- Department of Chemistry, Chicago Center for Theoretical Chemistry, Institute for Biophysical Dynamics, and James Franck Institute, The University of Chicago, Chicago, Illinois 60637, USA
| | - Yining Han
- Department of Chemistry, Chicago Center for Theoretical Chemistry, Institute for Biophysical Dynamics, and James Franck Institute, The University of Chicago, Chicago, Illinois 60637, USA
| | - Gregory A. Voth
- Department of Chemistry, Chicago Center for Theoretical Chemistry, Institute for Biophysical Dynamics, and James Franck Institute, The University of Chicago, Chicago, Illinois 60637, USA
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8
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Some Aspects of the Liquid Water Thermodynamic Behavior: From The Stable to the Deep Supercooled Regime. Int J Mol Sci 2020; 21:ijms21197269. [PMID: 33019640 PMCID: PMC7582456 DOI: 10.3390/ijms21197269] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2020] [Revised: 09/25/2020] [Accepted: 09/26/2020] [Indexed: 12/02/2022] Open
Abstract
Liquid water is considered to be a peculiar example of glass forming materials because of the possibility of giving rise to amorphous phases with different densities and of the thermodynamic anomalies that characterize its supercooled liquid phase. In the present work, literature data on the density of bulk liquid water are analyzed in a wide temperature-pressure range, also including the glass phases. A careful data analysis, which was performed on different density isobars, made in terms of thermodynamic response functions, like the thermal expansion αP and the specific heat differences CP−CV, proves, exclusively from the experimental data, the thermodynamic consistence of the liquid-liquid transition hypothesis. The study confirms that supercooled bulk water is a mixture of two liquid “phases”, namely the high density (HDL) and the low density (LDL) liquids that characterize different regions of the water phase diagram. Furthermore, the CP−CV isobars behaviors clearly support the existence of both a liquid–liquid transition and of a liquid–liquid critical point.
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9
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Brites CDS, Zhuang B, Debasu ML, Ding D, Qin X, Maturi FE, Lim WWY, Soh DW, Rocha J, Yi Z, Liu X, Carlos LD. Decoding a Percolation Phase Transition of Water at ∼330 K with a Nanoparticle Ruler. J Phys Chem Lett 2020; 11:6704-6711. [PMID: 32672973 DOI: 10.1021/acs.jpclett.0c02147] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Liquid water, despite its simple molecular structure, remains one of the most fascinating and complex substances. Most notably, many questions continue to exist regarding the phase transitions and anomalous properties of water, which are subtle to observe experimentally. Here, we report a sharp transition in water at 330 K unveiled through experimental measurements of the instantaneous Brownian velocity of NaYF4:Yb/Er upconversion nanoparticles in water. Our experimental investigations, corroborated by molecular dynamics simulations, elucidate a geometrical phase transition where a low-density liquid (LDL) clusters become percolated below 330 K. Around this critical temperature, we find the sizes of the LDL clusters to be similar to those of the nanoparticles, confirming the role of the upconversion nanoparticle as a powerful ruler for measuring the extensiveness of the LDL hydrogen-bond network and nanometer-scale spatial changes (20-100 nm) in liquids. Additionally, a new order parameter that unequivocally classifies water molecules into two local geometric states is introduced, providing a new tool for understanding and modeling water's many anomalous properties and phase transitions.
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Affiliation(s)
- Carlos D S Brites
- Phantom-g, CICECO - Aveiro Institute of Materials, Department of Physics, Universidade de Aveiro, 3810-193 Aveiro, Portugal
| | - Bilin Zhuang
- Institute of High Performance Computing, Singapore 138632, Singapore
- Yale-NUS College, Singapore 138527, Singapore
| | - Mengistie L Debasu
- Phantom-g, CICECO - Aveiro Institute of Materials, Department of Physics, Universidade de Aveiro, 3810-193 Aveiro, Portugal
- Department of Chemistry and CICECO - Aveiro Institute of Materials, Universidade de Aveiro, 3810-193 Aveiro, Portugal
| | - Ding Ding
- Institute of Materials Research and Engineering, Singapore 138634, Singapore
| | - Xian Qin
- Department of Chemistry, National University of Singapore, Singapore 117543, Singapore
| | - Fernando E Maturi
- Phantom-g, CICECO - Aveiro Institute of Materials, Department of Physics, Universidade de Aveiro, 3810-193 Aveiro, Portugal
| | - Winnie W Y Lim
- Institute of High Performance Computing, Singapore 138632, Singapore
| | - De Wen Soh
- Institute of High Performance Computing, Singapore 138632, Singapore
| | - J Rocha
- Department of Chemistry and CICECO - Aveiro Institute of Materials, Universidade de Aveiro, 3810-193 Aveiro, Portugal
| | - Zhigao Yi
- Department of Chemistry, National University of Singapore, Singapore 117543, Singapore
| | - Xiaogang Liu
- Department of Chemistry, National University of Singapore, Singapore 117543, Singapore
- Joint School of National University of Singapore and Tianjin University, International Campus of Tianjin University, Fuzhou 350207, P.R. China
| | - Luís D Carlos
- Phantom-g, CICECO - Aveiro Institute of Materials, Department of Physics, Universidade de Aveiro, 3810-193 Aveiro, Portugal
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10
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Specific Heat and Transport Functions ofWater. Int J Mol Sci 2020; 21:ijms21020622. [PMID: 31963571 PMCID: PMC7014045 DOI: 10.3390/ijms21020622] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2019] [Revised: 01/13/2020] [Accepted: 01/14/2020] [Indexed: 11/21/2022] Open
Abstract
Numerous water characteristics are essentially ascribed to its peculiarity to form strong hydrogen bonds that become progressively more stable on decreasing the temperature. However, the structural and dynamical implications of the molecular rearrangement are still subject of debate and intense studies. In this work, we observe that the thermodynamic characteristics of liquid water are strictly connected to its dynamic characteristics. In particular, we compare the thermal behaviour of the isobaric specific heat of water, measured in different confinement conditions at atmospheric pressure (and evaluated by means of theoretical studies) with its configurational contribution obtained from the values of the measured self-diffusion coefficient through the use of the Adam–Gibbs approach. Our results confirm the existence of a maximum in the specific heat of water at about 225 K and indicate that especially at low temperature the configurational contributions to the entropy are dominant.
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11
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Zhang M, Wiener CG, Sepulveda-Medina PI, Douglas JF, Vogt BD. Influence of Sodium Salts on the Swelling and Rheology of Hydrophobically Cross-linked Hydrogels Determined by QCM-D. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:16612-16623. [PMID: 31747520 DOI: 10.1021/acs.langmuir.9b03063] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Hydrophobically modified copolymers provide a versatile platform of hydrogel materials for diverse applications, but the influence of salts on the swelling and material properties of this class of hydrogels has not been extensively studied. Here, we investigate model hydrogels with three different sodium salts with anions chosen from the classic Hofmeister series to determine how these counterions influence the swelling and mechanical properties of neutral hydrogels. The gel chosen was based on a statistical copolymer of dimethylacrylamide and 2-(N-ethylperfluorooctane sulfonamido) ethyl acrylate (FOSA). Our measurements utilize a quartz crystal microbalance with dissipation (QCM-D) to quantify both swelling and rheological properties of these gels. We find that a 1 mol/L solution of Na2SO4, corresponding to a kosmotropic anion, leads to nearly a 2.6-fold gel deswelling and correspondingly, the complex modulus increases by an order of magnitude under these solution conditions. In contrast, an initial increase in swelling and then a swelling maximum is observed for a 0.02 mol/L concentration in the case of a chaotropic anion, NaClO4, but the changes in the degree of gel swelling in this system are not directly correlated with changes in the gel shear modulus. The addition of NaBr, an anion salt closer to the middle of the chaotropic to kosmotropic range, leads to hydrogel deswelling where the degree of deswelling and the shear modulus are both nearly independent of salt concentration. Overall, the observed trends are broadly consistent with more kosmotropic ions causing diminished solubility ("salting out") and strongly chaotropic ions causing improved solubility ("salting in"), a trend characteristic of the Hoffmeister series governing the solubility of many proteins and synthetic water-soluble polymers, but trends in the shear stiffness with gel swelling are clearly different from those normally observed in chemically cross-linked gels and are correspondingly difficult to interpret. The salt specificity of swelling and mechanical properties of nonionic hydrogels is important for any potential application in which a wide range of salt concentrations and types are encountered.
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Affiliation(s)
- Mengxue Zhang
- Department of Polymer Engineering , University of Akron , Akron , Ohio 44325 United States
| | - Clinton G Wiener
- Department of Polymer Engineering , University of Akron , Akron , Ohio 44325 United States
| | | | - Jack F Douglas
- Materials Science and Engineering Division , National Institute of Standards and Technology , Gaithersburg , Maryland 20899 United States
| | - Bryan D Vogt
- Department of Chemical Engineering , The Pennsylvania State University , University Park , Pennsylvania 16802 United States
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12
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The Proton Density of States in Confined Water (H 2O). Int J Mol Sci 2019; 20:ijms20215373. [PMID: 31671726 PMCID: PMC6861890 DOI: 10.3390/ijms20215373] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2019] [Revised: 10/17/2019] [Accepted: 10/24/2019] [Indexed: 12/05/2022] Open
Abstract
The hydrogen density of states (DOS) in confined water has been probed by inelastic neutron scattering spectra in a wide range of its P–T phase diagram. The liquid–liquid transition and the dynamical crossover from the fragile (super-Arrhenius) to strong (Arrhenius) glass forming behavior have been studied, by taking into account the system polymorphism in both the liquid and amorphous solid phases. The interest is focused in the low energy region of the DOS (E<10 meV) and the data are discussed in terms of the energy landscape (local minima of the potential energy) approach. In this latest research, we consider a unit scale energy (EC) linked to the water local order governed by the hydrogen bonding (HB). All the measured spectra, scaled according to such energy, evidence a universal power law behavior with different exponents (γ) in the strong and fragile glass forming regions, respectively. In the first case, the DOS data obey the Debye squared-frequency law, whereas, in the second one, we obtain a value predicted in terms of the mode-coupling theory (MCT) (γ≃1.6).
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13
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Mallamace F, Corsaro C, Mallamace D, Fazio E, Chen SH. Some considerations on the water polymorphism and the liquid-liquid transition by the density behavior in the liquid phase. J Chem Phys 2019; 151:044504. [PMID: 31370513 DOI: 10.1063/1.5095687] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The bulk liquid water density data (ρ) are studied in a very large temperature pressure range including also the glass phases. A thorough analysis of their isobars, together with the suggestions of recent thermodynamical studies, gives evidence of two crossovers at T* and P* above which the hydrogen bond interaction is unable to arrange the tetrahedral network that is at the basis of the liquid polymorphism giving rise to the low density liquid (LDL). The curvatures of these isobars, as a function of T, are completely different: concave below P* (where maxima are) and convex above. In both the cases, a continuity between liquid and glass is observed with P* as the border of the density evolution toward the two different polymorphic glasses (low and high density amorphous). The experimental data of the densities of these two glasses also show a markedly different pressure dependence. Here, on the basis of these observations in bulk water and by considering a recent study on the growth of the LDL phase, by decreasing temperature, we discuss the water liquid-liquid transition and evaluate the isothermal compressibility inside the deep supercooled regime. Such a quantity shows an additional maximum that is pressure dependent that under ambient conditions agrees with a recent X-ray experiment. In particular, the present analysis suggests the presence of a liquid-liquid critical point located at about 180 MPa and 197 K.
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Affiliation(s)
- Francesco Mallamace
- Department of Nuclear Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - Carmelo Corsaro
- Dipartimento di Scienze Matematiche e Informatiche, Scienze Fisiche e Scienze della Terra (MIFT), Università di Messina I-98166, Messina, Italy
| | - Domenico Mallamace
- Dipartimento di Scienze Matematiche e Informatiche, Scienze Fisiche e Scienze della Terra (MIFT), Università di Messina I-98166, Messina, Italy
| | - Enza Fazio
- Dipartimento di Scienze Matematiche e Informatiche, Scienze Fisiche e Scienze della Terra (MIFT), Università di Messina I-98166, Messina, Italy
| | - Sow-Hsin Chen
- Department of Nuclear Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
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14
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Bencivenga F, Mincigrucci R, Capotondi F, Foglia L, Naumenko D, Maznev AA, Pedersoli E, Simoncig A, Caporaletti F, Chiloyan V, Cucini R, Dallari F, Duncan RA, Frazer TD, Gaio G, Gessini A, Giannessi L, Huberman S, Kapteyn H, Knobloch J, Kurdi G, Mahne N, Manfredda M, Martinelli A, Murnane M, Principi E, Raimondi L, Spampinati S, Spezzani C, Trovò M, Zangrando M, Chen G, Monaco G, Nelson KA, Masciovecchio C. Nanoscale transient gratings excited and probed by extreme ultraviolet femtosecond pulses. SCIENCE ADVANCES 2019; 5:eaaw5805. [PMID: 31360768 PMCID: PMC6660206 DOI: 10.1126/sciadv.aaw5805] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2019] [Accepted: 06/20/2019] [Indexed: 05/27/2023]
Abstract
Advances in developing ultrafast coherent sources operating at extreme ultraviolet (EUV) and x-ray wavelengths allow the extension of nonlinear optical techniques to shorter wavelengths. Here, we describe EUV transient grating spectroscopy, in which two crossed femtosecond EUV pulses produce spatially periodic nanoscale excitations in the sample and their dynamics is probed via diffraction of a third time-delayed EUV pulse. The use of radiation with wavelengths down to 13.3 nm allowed us to produce transient gratings with periods as short as 28 nm and observe thermal and coherent phonon dynamics in crystalline silicon and amorphous silicon nitride. This approach allows measurements of thermal transport on the ~10-nm scale, where the two samples show different heat transport regimes, and can be applied to study other phenomena showing nontrivial behaviors at the nanoscale, such as structural relaxations in complex liquids and ultrafast magnetic dynamics.
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Affiliation(s)
- F. Bencivenga
- Elettra Sincrotrone Trieste S.C.p.A., Strada Statale 14, km 163.5, 34149 Basovizza (TS), Italy
| | - R. Mincigrucci
- Elettra Sincrotrone Trieste S.C.p.A., Strada Statale 14, km 163.5, 34149 Basovizza (TS), Italy
| | - F. Capotondi
- Elettra Sincrotrone Trieste S.C.p.A., Strada Statale 14, km 163.5, 34149 Basovizza (TS), Italy
| | - L. Foglia
- Elettra Sincrotrone Trieste S.C.p.A., Strada Statale 14, km 163.5, 34149 Basovizza (TS), Italy
| | - D. Naumenko
- Elettra Sincrotrone Trieste S.C.p.A., Strada Statale 14, km 163.5, 34149 Basovizza (TS), Italy
| | - A. A. Maznev
- Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USA
| | - E. Pedersoli
- Elettra Sincrotrone Trieste S.C.p.A., Strada Statale 14, km 163.5, 34149 Basovizza (TS), Italy
| | - A. Simoncig
- Elettra Sincrotrone Trieste S.C.p.A., Strada Statale 14, km 163.5, 34149 Basovizza (TS), Italy
| | - F. Caporaletti
- Department of Physics, University of Trento, Via Sommarive 14, Povo (TN), Italy
| | - V. Chiloyan
- Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USA
| | - R. Cucini
- IOM-CNR, Strada Statale 14, km 163.5, in Area Science Park, I-34012 Basovizza (TS), Italy
| | - F. Dallari
- Department of Physics, University of Trento, Via Sommarive 14, Povo (TN), Italy
| | - R. A. Duncan
- Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USA
| | - T. D. Frazer
- JILA and Department of Physics, University of Colorado, Boulder, CO 80309, USA
| | - G. Gaio
- Elettra Sincrotrone Trieste S.C.p.A., Strada Statale 14, km 163.5, 34149 Basovizza (TS), Italy
| | - A. Gessini
- Elettra Sincrotrone Trieste S.C.p.A., Strada Statale 14, km 163.5, 34149 Basovizza (TS), Italy
| | - L. Giannessi
- Elettra Sincrotrone Trieste S.C.p.A., Strada Statale 14, km 163.5, 34149 Basovizza (TS), Italy
| | - S. Huberman
- Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USA
| | - H. Kapteyn
- JILA and Department of Physics, University of Colorado, Boulder, CO 80309, USA
| | - J. Knobloch
- JILA and Department of Physics, University of Colorado, Boulder, CO 80309, USA
| | - G. Kurdi
- Elettra Sincrotrone Trieste S.C.p.A., Strada Statale 14, km 163.5, 34149 Basovizza (TS), Italy
| | - N. Mahne
- Elettra Sincrotrone Trieste S.C.p.A., Strada Statale 14, km 163.5, 34149 Basovizza (TS), Italy
- IOM-CNR, Strada Statale 14, km 163.5, in Area Science Park, I-34012 Basovizza (TS), Italy
| | - M. Manfredda
- Elettra Sincrotrone Trieste S.C.p.A., Strada Statale 14, km 163.5, 34149 Basovizza (TS), Italy
| | - A. Martinelli
- Department of Physics, University of Trento, Via Sommarive 14, Povo (TN), Italy
| | - M. Murnane
- JILA and Department of Physics, University of Colorado, Boulder, CO 80309, USA
| | - E. Principi
- Elettra Sincrotrone Trieste S.C.p.A., Strada Statale 14, km 163.5, 34149 Basovizza (TS), Italy
| | - L. Raimondi
- Elettra Sincrotrone Trieste S.C.p.A., Strada Statale 14, km 163.5, 34149 Basovizza (TS), Italy
| | - S. Spampinati
- Elettra Sincrotrone Trieste S.C.p.A., Strada Statale 14, km 163.5, 34149 Basovizza (TS), Italy
| | - C. Spezzani
- Elettra Sincrotrone Trieste S.C.p.A., Strada Statale 14, km 163.5, 34149 Basovizza (TS), Italy
| | - M. Trovò
- Elettra Sincrotrone Trieste S.C.p.A., Strada Statale 14, km 163.5, 34149 Basovizza (TS), Italy
| | - M. Zangrando
- Elettra Sincrotrone Trieste S.C.p.A., Strada Statale 14, km 163.5, 34149 Basovizza (TS), Italy
- IOM-CNR, Strada Statale 14, km 163.5, in Area Science Park, I-34012 Basovizza (TS), Italy
| | - G. Chen
- Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USA
| | - G. Monaco
- Department of Physics, University of Trento, Via Sommarive 14, Povo (TN), Italy
| | - K. A. Nelson
- Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USA
| | - C. Masciovecchio
- Elettra Sincrotrone Trieste S.C.p.A., Strada Statale 14, km 163.5, 34149 Basovizza (TS), Italy
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15
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Martelli F. Unravelling the contribution of local structures to the anomalies of water: The synergistic action of several factors. J Chem Phys 2019; 150:094506. [PMID: 30849899 DOI: 10.1063/1.5087471] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We investigate the microscopic origin of water's anomalies by inspecting the hydrogen bond network (HBN) and the spatial organization of low-density-liquid (LDL) like and high-density-liquid (HDL) like environments. Specifically, we simulate-via classical molecular dynamics simulations-the isobaric cooling of a sample composed of 512 water molecules from ambient to deeply undercooled conditions at three pressures, namely, 1 bar, 400 bars, and 1000 bars. In correspondence with the Widom line (WL), (i) the HDL-like dominating cluster undergoes fragmentation caused by the percolation of LDL-like aggregates following a spinodal-like kinetics; (ii) such fragmentation always occurs at a "critical" concentration of ∼20%-30% in LDL; (iii) the HBN within LDL-like environments is characterized by an equal number of pentagonal and hexagonal rings that create a state of maximal frustration between a configuration that promotes crystallization (hexagonal ring) and a configuration that hinders it (pentagonal ring); (iv) the spatial organization of HDL-like environments shows a marked variation. Moreover, the inspection of the global symmetry shows that the intermediate-range order decreases in correspondence with the WL and such a decrease becomes more pronounced upon increasing the pressure, hence supporting the hypothesis of a liquid-liquid critical point. Our results reveal and rationalize the complex microscopic origin of water's anomalies as the cooperative effect of several factors acting synergistically. Beyond implications for water, our findings may be extended to other materials displaying anomalous behaviours.
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Affiliation(s)
- Fausto Martelli
- IBM Research, Hartree Centre, Daresbury WA4 4AD, United Kingdom
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16
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Thangswamy M, Dutta D, Maheshwari P, Sen D, Pujari PK. Energetics of ice nucleation in mesoporous titania using positron annihilation spectroscopy. Phys Chem Chem Phys 2019; 21:6033-6041. [PMID: 30810122 DOI: 10.1039/c8cp06121a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The low temperature behavior of water and kinetics of ice nucleation in titania mesopores have been probed by positron annihilation lifetime spectroscopy as a function of pore filling. It is revealed that water undergoes complete freezing at around 220 K when more than 50% of the pore volume is filled and such freezing is hindered at lower hydration levels. A model describing progressive trapping of positronium by ice nuclei in liquid water during the phase transition is employed to estimate the energy associated with the nucleation under confinement. It is observed that the energy for ice nucleation in confinement is less than the activation energy for nucleation in bulk water because of the surface assisted nucleation inside the pore. Interestingly, energy for nucleation is seen to decrease with the lowering of hydration level and ascribed to the curtailed hydrogen bonding network of water at lower pore filling.
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17
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Abstract
Liquid water is considered poorly understood. How are water's physical properties encoded in its molecular structure? We introduce a statistical mechanical model (CageWater) of water's hydrogen-bonding (HB) and Lennard-Jones (LJ) interactions. It predicts the energetic and volumetric and anomalous properties accurately. Yet, because the model is analytical, it is essentially instantaneous to compute. This model advances our understanding beyond current molecular simulations and experiments. Water has long been regarded as a "2-density liquid": a dense LJ liquid and a looser HB one. Instead, we find here a different antagonism underlying water structure-property relations: HBs in water-water pairs drive density, while HBs in cooperative cages drive openness. The balance shifts strongly with temperature and pressure. This model interprets the molecular structures underlying the liquid-liquid phase transition in supercooled water. It may have value in geophysics, biomolecular modeling, and engineering of materials for water purification and green chemistry.
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Affiliation(s)
- Tomaz Urbic
- Faculty of Chemistry and Chemical Technology, University of Ljubljana, Večna pot 113, Ljubljana SI-1000, Slovenia
| | - Ken A. Dill
- Laufer Center for Physical and Quantitative Biology and Departments of Chemistry and of Physics & Astronomy, Stony Brook University, Stony Brook, New York 11794-5252, United States
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18
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Mallamace F, Corsaro C, Longo S, Chen SH, Mallamace D. The evaluation of the hydrophilic-hydrophobic interactions and their effect in water-methanol solutions: A study in terms of the thermodynamic state functions in the frame of the transition state theory. Colloids Surf B Biointerfaces 2018; 168:193-200. [PMID: 29352638 DOI: 10.1016/j.colsurfb.2018.01.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2017] [Revised: 12/01/2017] [Accepted: 01/06/2018] [Indexed: 11/29/2022]
Abstract
Aqueous solutions of amphiphilic molecules are characterized by the competition between hydrophilic and hydrophobic interactions. These interactions have a different energetic dependence with the temperature. Whereas hydrophilic interactions have been well characterized, a complete theory for the hydrophobic ones is still lacking as well as the comprehension of the effect that the solvent exerts on the solute and vice versa. In this paper from the measured relaxation time, we evaluated the thermodynamic state functions of water-methanol solutions in the frame of the transition state theory. In particular we study the behavior of the Gibbs free energy, enthalpy and entropy of water, methanol and some of their solutions as a function of both temperature and water molar fraction. Our results indicate that the temperature of about 280 K represents a crossover between two regions dominated by hydrophobicity (high T) and hydrophilicity (low T).
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Affiliation(s)
- Francesco Mallamace
- MIFT Department, University of Messina, Viale F. Stagno d'Alcontres 31, 98166 Messina, Italy; Institute for Chemical and Physical Processes IPCF-CNR of Messina, Viale F. Stagno d'Alcontres 37, 98158 Messina, Italy; NSE Department, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Carmelo Corsaro
- MIFT Department, University of Messina, Viale F. Stagno d'Alcontres 31, 98166 Messina, Italy; Institute for Chemical and Physical Processes IPCF-CNR of Messina, Viale F. Stagno d'Alcontres 37, 98158 Messina, Italy
| | - Sveva Longo
- MIFT Department, University of Messina, Viale F. Stagno d'Alcontres 31, 98166 Messina, Italy
| | - Sow-Hsin Chen
- NSE Department, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Domenico Mallamace
- MIFT Department, University of Messina, Viale F. Stagno d'Alcontres 31, 98166 Messina, Italy.
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19
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Pamuk B, Allen PB, Fernández-Serra MV. Insights into the Structure of Liquid Water from Nuclear Quantum Effects on the Density and Compressibility of Ice Polymorphs. J Phys Chem B 2018; 122:5694-5706. [DOI: 10.1021/acs.jpcb.8b00110] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Betül Pamuk
- School of Applied and Engineering Physics, Cornell University, Ithaca, New York 14853, United States
- Physics and Astronomy Department, Stony Brook University, Stony Brook, New York 11794-3800, United States
| | - P. B. Allen
- Physics and Astronomy Department, Stony Brook University, Stony Brook, New York 11794-3800, United States
| | - M.-V. Fernández-Serra
- Physics and Astronomy Department, Stony Brook University, Stony Brook, New York 11794-3800, United States
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20
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Goy C, Potenza MAC, Dedera S, Tomut M, Guillerm E, Kalinin A, Voss KO, Schottelius A, Petridis N, Prosvetov A, Tejeda G, Fernández JM, Trautmann C, Caupin F, Glasmacher U, Grisenti RE. Shrinking of Rapidly Evaporating Water Microdroplets Reveals their Extreme Supercooling. PHYSICAL REVIEW LETTERS 2018; 120:015501. [PMID: 29350942 DOI: 10.1103/physrevlett.120.015501] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2017] [Indexed: 05/26/2023]
Abstract
The fast evaporative cooling of micrometer-sized water droplets in a vacuum offers the appealing possibility to investigate supercooled water-below the melting point but still a liquid-at temperatures far beyond the state of the art. However, it is challenging to obtain a reliable value of the droplet temperature under such extreme experimental conditions. Here, the observation of morphology-dependent resonances in the Raman scattering from a train of perfectly uniform water droplets allows us to measure the variation in droplet size resulting from evaporative mass losses with an absolute precision of better than 0.2%. This finding proves crucial to an unambiguous determination of the droplet temperature. In particular, we find that a fraction of water droplets with an initial diameter of 6379±12 nm remain liquid down to 230.6±0.6 K. Our results question temperature estimates reported recently for larger supercooled water droplets and provide valuable information on the hydrogen-bond network in liquid water in the hard-to-access deeply supercooled regime.
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Affiliation(s)
- Claudia Goy
- Institut für Kernphysik, J. W. Goethe-Universität Frankfurt(M), 60438 Frankfurt(M), Germany
| | - Marco A C Potenza
- Dipartimento di Fisica, Università degli Studi di Milano, 20133 Milano, Italy
| | | | - Marilena Tomut
- GSI-Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany
| | - Emmanuel Guillerm
- Université Lyon, Université Claude Bernard Lyon 1, CNRS, Institut Lumière Matière, 69622 Lyon, France
| | - Anton Kalinin
- Institut für Kernphysik, J. W. Goethe-Universität Frankfurt(M), 60438 Frankfurt(M), Germany
- GSI-Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany
| | - Kay-Obbe Voss
- GSI-Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany
| | - Alexander Schottelius
- Institut für Kernphysik, J. W. Goethe-Universität Frankfurt(M), 60438 Frankfurt(M), Germany
| | - Nikolaos Petridis
- GSI-Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany
| | - Alexey Prosvetov
- GSI-Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany
| | - Guzmán Tejeda
- Laboratory of Molecular Fluid Dynamics, Instituto de Estructura de la Materia, CSIC, 28006 Madrid, Spain
| | - José M Fernández
- Laboratory of Molecular Fluid Dynamics, Instituto de Estructura de la Materia, CSIC, 28006 Madrid, Spain
| | - Christina Trautmann
- GSI-Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany
- Material- und Geowissenschaften, Technische Universität Darmstadt, 64287 Darmstadt, Germany
| | - Frédéric Caupin
- Université Lyon, Université Claude Bernard Lyon 1, CNRS, Institut Lumière Matière, 69622 Lyon, France
| | | | - Robert E Grisenti
- Institut für Kernphysik, J. W. Goethe-Universität Frankfurt(M), 60438 Frankfurt(M), Germany
- GSI-Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany
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21
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Kim KH, Späh A, Pathak H, Perakis F, Mariedahl D, Amann-Winkel K, Sellberg JA, Lee JH, Kim S, Park J, Nam KH, Katayama T, Nilsson A. Maxima in the thermodynamic response and correlation functions of deeply supercooled water. Science 2017; 358:1589-1593. [DOI: 10.1126/science.aap8269] [Citation(s) in RCA: 203] [Impact Index Per Article: 29.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2017] [Accepted: 11/02/2017] [Indexed: 01/13/2023]
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22
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Brini E, Fennell CJ, Fernandez-Serra M, Hribar-Lee B, Lukšič M, Dill KA. How Water's Properties Are Encoded in Its Molecular Structure and Energies. Chem Rev 2017; 117:12385-12414. [PMID: 28949513 PMCID: PMC5639468 DOI: 10.1021/acs.chemrev.7b00259] [Citation(s) in RCA: 194] [Impact Index Per Article: 27.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2017] [Indexed: 11/29/2022]
Abstract
How are water's material properties encoded within the structure of the water molecule? This is pertinent to understanding Earth's living systems, its materials, its geochemistry and geophysics, and a broad spectrum of its industrial chemistry. Water has distinctive liquid and solid properties: It is highly cohesive. It has volumetric anomalies-water's solid (ice) floats on its liquid; pressure can melt the solid rather than freezing the liquid; heating can shrink the liquid. It has more solid phases than other materials. Its supercooled liquid has divergent thermodynamic response functions. Its glassy state is neither fragile nor strong. Its component ions-hydroxide and protons-diffuse much faster than other ions. Aqueous solvation of ions or oils entails large entropies and heat capacities. We review how these properties are encoded within water's molecular structure and energies, as understood from theories, simulations, and experiments. Like simpler liquids, water molecules are nearly spherical and interact with each other through van der Waals forces. Unlike simpler liquids, water's orientation-dependent hydrogen bonding leads to open tetrahedral cage-like structuring that contributes to its remarkable volumetric and thermal properties.
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Affiliation(s)
- Emiliano Brini
- Laufer
Center for Physical and Quantitative Biology, Department of Physics and Astronomy, and Department of
Chemistry, Stony Brook University, Stony Brook, New York 11794, United States
| | - Christopher J. Fennell
- Department
of Chemistry, Oklahoma State University, Stillwater, Oklahoma 74078, United States
| | - Marivi Fernandez-Serra
- Laufer
Center for Physical and Quantitative Biology, Department of Physics and Astronomy, and Department of
Chemistry, Stony Brook University, Stony Brook, New York 11794, United States
| | - Barbara Hribar-Lee
- Faculty
of Chemistry and Chemical Technology, University
of Ljubljana, Večna
pot 113, SI-1000 Ljubljana, Slovenia
| | - Miha Lukšič
- Faculty
of Chemistry and Chemical Technology, University
of Ljubljana, Večna
pot 113, SI-1000 Ljubljana, Slovenia
| | - Ken A. Dill
- Laufer
Center for Physical and Quantitative Biology, Department of Physics and Astronomy, and Department of
Chemistry, Stony Brook University, Stony Brook, New York 11794, United States
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23
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Indra S, Daschakraborty S. Mechanism of translational jump of a hydrophobic solute in supercooled water: Importance of presolvation. Chem Phys Lett 2017. [DOI: 10.1016/j.cplett.2017.07.084] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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24
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Raudino A, Raciti D, Corti M. Anomalous Behavior of Ultra-Low-Amplitude Capillary Waves. A Glimpse of the Viscoelastic Properties of Interfacial Water? LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:6439-6448. [PMID: 28520431 DOI: 10.1021/acs.langmuir.7b00895] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
We investigate, both theoretically and by a differential interferometric technique, the behavior of large-wavelength capillary waves (of the order of 10-4 m) selectively excited at the surface of drops and bubbles with typical eigenfrequencies of the order of 102 Hz. The resonance peaks of gas bubbles or hydrocarbon drops in water (radius less than 1 mm) highlight anomalously small dissipation in the region of ultralow (sub-nanometric) oscillation amplitudes, reaching a plateau at higher amplitudes. This is in sharp contrast to the usual oscillating systems, where an anomalous behavior holds at large amplitudes alone. Dissipation is strongly dependent on the excited vibrational modes and, in spite of remarkable numerical differences, water-vapor and water-hydrocarbon interfaces exhibit the same overall trend. A phenomenological model was developed, based on the assumption that water possesses a threshold viscoelasticity, above which it behaves like a regular viscous fluid. The well-known Deborah number was then estimated within the anomalous region and found to lie in the range of viscoelastic fluids. In agreement with previous studies of nanohydrodynamics (e.g., atomic force microscopy measurements with sub-nanometric tip motions), the present one lends support to the idea that every self-aggregating fluid exhibits yield stress behavior, including classical Newtonian fluids like water. The essential requirement is that the applied perturbation lie below a critical threshold, above which viscous behavior is recovered. Our differential interferometric technique seems particularly suitable for this type of studies, as it allows measurement of long-wavelength capillary waves with sub-nanometric resolution on the oscillation amplitudes.
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Affiliation(s)
- Antonio Raudino
- Department of Chemical Sciences, University of Catania , Viale A. Doria 6, 95125, Catania, Italy
| | - Domenica Raciti
- Department of Chemical Sciences, University of Catania , Viale A. Doria 6, 95125, Catania, Italy
| | - Mario Corti
- CNR-IPCF , Viale F. Stagno d'Alcontres 37, 98158 Messina, Italy
- LITA, University of Milano , Via Fratelli Cervi 93, 20090 Segrate Milano, Italy
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25
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Munaò G, Saija F. Integral equation study of soft-repulsive dimeric fluids. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2017; 29:115101. [PMID: 28155850 DOI: 10.1088/1361-648x/aa5306] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
We study fluid structure and water-like anomalies of a system constituted by dimeric particles interacting via a purely repulsive core-softened potential by means of integral equation theories. In our model, dimers interact through a repulsive pair potential of inverse-power form with a softened repulsion strength. By employing the Ornstein-Zernike approach and the reference interaction site model (RISM) theory, we study the behavior of water-like anomalies upon progressively increasing the elongation λ of the dimers from the monomeric case ([Formula: see text]) to the tangent configuration ([Formula: see text]). For each value of the elongation we consider two different values of the interaction potential, corresponding to one and two length scales, with the aim to provide a comprehensive description of the possible fluid scenarios of this model. Our theoretical results are systematically compared with already existing or newly generated Monte Carlo data: we find that theories and simulations agree in providing the picture of a fluid exhibiting density and structural anomalies for low values of λ and for both the two values of the interaction potential. Integral equation theories give accurate predictions for pressure and radial distribution functions, whereas the temperatures where anomalies occur are underestimated. Upon increasing the elongation, the RISM theory still predicts the existence of anomalies; the latter are no longer observed in simulations, since their development is likely precluded by the onset of crystallization. We discuss our results in terms of the reliability of integral equation theories in predicting the existence of water-like anomalies in core-softened fluids.
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Affiliation(s)
- Gianmarco Munaò
- Dipartimento di Scienze Matematiche e Informatiche, Scienze Fisiche e Scienze della Terra, Università degli Studi di Messina, Viale F. Stagno d'Alcontres 31, 98166 Messina, Italy
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26
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Khusnutdinoff RM. Structural and dynamic features of water and amorphous ice. COLLOID JOURNAL 2017. [DOI: 10.1134/s1061933x17010070] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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27
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Schlesinger D, Wikfeldt KT, Skinner LB, Benmore CJ, Nilsson A, Pettersson LGM. The temperature dependence of intermediate range oxygen-oxygen correlations in liquid water. J Chem Phys 2017; 145:084503. [PMID: 27586931 DOI: 10.1063/1.4961404] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
We analyze the recent temperature dependent oxygen-oxygen pair-distribution functions from experimental high-precision x-ray diffraction data of bulk water by Skinner et al. [J. Chem. Phys. 141, 214507 (2014)] with particular focus on the intermediate range where small, but significant, correlations are found out to 17 Å. The second peak in the pair-distribution function at 4.5 Å is connected to tetrahedral coordination and was shown by Skinner et al. to change behavior with temperature below the temperature of minimum isothermal compressibility. Here we show that this is associated also with a peak growing at 11 Å which strongly indicates a collective character of fluctuations leading to the enhanced compressibility at lower temperatures. We note that the peak at ∼13.2 Å exhibits a temperature dependence similar to that of the density with a maximum close to 277 K or 4 °C. We analyze simulations of the TIP4P/2005 water model in the same manner and find excellent agreement between simulations and experiment albeit with a temperature shift of ∼20 K.
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Affiliation(s)
- Daniel Schlesinger
- Department of Physics, AlbaNova University Center, Stockholm University, SE-106 91 Stockholm, Sweden
| | - K Thor Wikfeldt
- Department of Physics, AlbaNova University Center, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Lawrie B Skinner
- X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - Chris J Benmore
- X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - Anders Nilsson
- Department of Physics, AlbaNova University Center, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Lars G M Pettersson
- Department of Physics, AlbaNova University Center, Stockholm University, SE-106 91 Stockholm, Sweden
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28
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Mallamace F, Corsaro C, Mallamace D, Vasi C, Vasi S, Stanley HE. Dynamical properties of water-methanol solutions. J Chem Phys 2016; 144:064506. [PMID: 26874496 DOI: 10.1063/1.4941414] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
We study the relaxation times tα in the water-methanol system. We examine new data and data from the literature in the large temperature range 163 < T < 335 K obtained using different experimental techniques and focus on how tα affects the hydrogen bond structure of the system and the hydrophobicity of the alcohol methyl group. We examine the relaxation times at a fixed temperature as a function of the water molar fraction XW and observe two opposite behaviors in their curvature when the system moves from high to low T regimes. This behavior differs from that of an ideal solution in that it has excess values located at different molar fractions (XW = 0.5 for high T and 0.75 in the deep supercooled regime). We analyze the data and find that above a crossover temperature T ∼ 223 K, hydrophobicity plays a significant role and below it the water tetrahedral network dominates. This temperature is coincident with the fragile-to-strong dynamical crossover observed in confined water and supports the liquid-liquid phase transition hypothesis. At the same time, the reported data suggest that this crossover temperature (identified as the Widom line temperature) also depends on the alcohol concentration.
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Affiliation(s)
- Francesco Mallamace
- Dipartimento MIFT, Sezione di Fisica, Università di Messina, I-98166 Messina, Italy
| | - Carmelo Corsaro
- Dipartimento MIFT, Sezione di Fisica, Università di Messina, I-98166 Messina, Italy
| | - Domenico Mallamace
- Consorzio per lo Sviluppo dei Sistemi a Grande Interfase, Unità di Catania, I-95125 Catania, Italy
| | - Cirino Vasi
- Consiglio Nazionale delle Ricerche-IPCF Messina, I-98158 Messina, Italy
| | - Sebastiano Vasi
- Dipartimento MIFT, Sezione di Fisica, Università di Messina, I-98166 Messina, Italy
| | - H Eugene Stanley
- Center for Polymer Studies and Department of Physics, Boston University, Boston, Massachusetts 02215, USA
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29
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Cerdeiriña CA, Debenedetti PG. Water anomalous thermodynamics, attraction, repulsion, and hydrophobic hydration. J Chem Phys 2016; 144:164501. [DOI: 10.1063/1.4947062] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Claudio A. Cerdeiriña
- Departamento de Física Aplicada, Universidad de Vigo—Campus del Agua, Ourense 32004, Spain
| | - Pablo G. Debenedetti
- Department of Chemical and Biological Engineering, Princeton University, Princeton, New Jersey 08544, USA
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30
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Mallamace F, Corsaro C, Mallamace D, Vasi C, Vasi S, Stanley HE. Some Considerations on Confined Water: The Thermal Behavior of Transport Properties in Water-Glycerol and Water-Methanol Mixtures. ACTA ACUST UNITED AC 2016. [DOI: 10.1557/adv.2016.53] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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31
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Elton DC, Fernández-Serra M. The hydrogen-bond network of water supports propagating optical phonon-like modes. Nat Commun 2016; 7:10193. [PMID: 26725363 PMCID: PMC4725765 DOI: 10.1038/ncomms10193] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2015] [Accepted: 11/12/2015] [Indexed: 11/18/2022] Open
Abstract
The local structure of liquid water as a function of temperature is a source of intense research. This structure is intimately linked to the dynamics of water molecules, which can be measured using Raman and infrared spectroscopies. The assignment of spectral peaks depends on whether they are collective modes or single-molecule motions. Vibrational modes in liquids are usually considered to be associated to the motions of single molecules or small clusters. Using molecular dynamics simulations, here we find dispersive optical phonon-like modes in the librational and OH-stretching bands. We argue that on subpicosecond time scales these modes propagate through water's hydrogen-bond network over distances of up to 2 nm. In the long wavelength limit these optical modes exhibit longitudinal–transverse splitting, indicating the presence of coherent long-range dipole–dipole interactions, as in ice. Our results indicate the dynamics of liquid water have more similarities to ice than previously thought. How the local structure of water varies as a function of temperature is a long-studied topic, which is still under debate. Here, the authors show that dielectric susceptibility measurements might be used to probe and identify propagating optical phonon-like modes in the hydrogen-bond network of water.
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Affiliation(s)
- Daniel C Elton
- Department of Physics and Astronomy, Stony Brook University, Stony Brook, New York 11794-3800, USA.,Institute for Advanced Computational Science, Stony Brook University, Stony Brook, New York 11794-3800, USA
| | - Marivi Fernández-Serra
- Department of Physics and Astronomy, Stony Brook University, Stony Brook, New York 11794-3800, USA.,Institute for Advanced Computational Science, Stony Brook University, Stony Brook, New York 11794-3800, USA
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32
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Munaó G, Saija F. Density and structural anomalies in soft-repulsive dimeric fluids. Phys Chem Chem Phys 2016; 18:9484-9. [DOI: 10.1039/c6cp00191b] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We performed a simulation study of the fluid structure of dimeric particles interacting via a core-softened potential and shed light on their anomalous behaviours upon varying both geometrical and interaction parameters.
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Affiliation(s)
- Gianmarco Munaó
- Dipartimento di Scienza Matematiche e Informatiche
- Scienze Fisiche e Scienze della Terra
- Universitá degli Studi di Messina
- 98158 Messina
- Italy
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33
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Mallamace F, Corsaro C, Mallamace D, Vasi S, Vasi C, Stanley HE. Thermodynamic properties of bulk and confined water. J Chem Phys 2015; 141:18C504. [PMID: 25399169 DOI: 10.1063/1.4895548] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
The thermodynamic response functions of water display anomalous behaviors. We study these anomalous behaviors in bulk and confined water. We use nuclear magnetic resonance (NMR) to examine the configurational specific heat and the transport parameters in both the thermal stable and the metastable supercooled phases. The data we obtain suggest that there is a behavior common to both phases: that the dynamics of water exhibit two singular temperatures belonging to the supercooled and the stable phase, respectively. One is the dynamic fragile-to-strong crossover temperature (T(L) ≃ 225 K). The second, T* ∼ 315 ± 5 K, is a special locus of the isothermal compressibility K(T)(T, P) and the thermal expansion coefficient α(P)(T, P) in the P-T plane. In the case of water confined inside a protein, we observe that these two temperatures mark, respectively, the onset of protein flexibility from its low temperature glass state (T(L)) and the onset of the unfolding process (T*).
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Affiliation(s)
- Francesco Mallamace
- Dipartimento di Fisica e Scienza della Terra Università di Messina and CNISM, I-98168 Messina, Italy
| | - Carmelo Corsaro
- Dipartimento di Fisica e Scienza della Terra Università di Messina and CNISM, I-98168 Messina, Italy
| | - Domenico Mallamace
- Dipartimento di Scienze dell'Ambiente, della Sicurezza, del Territorio, degli Alimenti e della Salute, Università di Messina, I-98166 Messina, Italy
| | | | | | - H Eugene Stanley
- Center for Polymer Studies and Department of Physics, Boston University, Boston, Massachusetts 02215, USA
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34
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Liang XM, Sekar PK, Zhao G, Zhou X, Shu Z, Huang Z, Ding W, Zhang Q, Gao D. High accuracy thermal conductivity measurement of aqueous cryoprotective agents and semi-rigid biological tissues using a microfabricated thermal sensor. Sci Rep 2015; 5:10377. [PMID: 25993037 PMCID: PMC4438607 DOI: 10.1038/srep10377] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2014] [Accepted: 04/07/2015] [Indexed: 11/09/2022] Open
Abstract
An improved thermal-needle approach for accurate and fast measurement of thermal conductivity of aqueous and soft biomaterials was developed using microfabricated thermal conductivity sensors. This microscopic measuring device was comprehensively characterized at temperatures from 0 °C to 40 °C. Despite the previous belief, system calibration constant was observed to be highly temperature-dependent. Dynamic thermal conductivity response during cooling (40 °C to -40 °C) was observed using the miniaturized single tip sensor for various concentrations of CPAs, i.e., glycerol, ethylene glycol and dimethyl sulfoxide. Chicken breast, chicken skin, porcine limb, and bovine liver were assayed to investigate the effect of anatomical heterogeneity on thermal conductivity using the arrayed multi-tip sensor at 20 °C. Experimental results revealed distinctive differences in localized thermal conductivity, which suggests the use of approximated or constant property values is expected to bring about results with largely inflated uncertainties when investigating bio-heat transfer mechanisms and/or performing sophisticated thermal modeling with complex biological tissues. Overall, the presented micro thermal sensor with automated data analysis algorithm is a promising approach for direct thermal conductivity measurement of aqueous solutions and soft biomaterials and is of great value to cryopreservation of tissues, hyperthermia or cryogenic, and other thermal-based clinical diagnostics and treatments.
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Affiliation(s)
- Xin M Liang
- 1] Centre for Biomedical Engineering, Department of Electronic Science and Technology, University of Science and Technology of China, Hefei, Anhui 230027, China [2] USTC Center for Micro- and Nanoscale Research and Fabrication, University of Science and Technology of China, Hefei, Anhui 230027, China [3] Department of Mechanical Engineering, University of Washington, Seattle, WA 98195, USA [4] CAS Key Laboratory of Mechanical Behavior and Design of Material, Department of Modern Mechanics, University of Science and Technology of China, Hefei, Anhui 230027, China
| | - Praveen K Sekar
- Department of Mechanical Engineering, University of Washington, Seattle, WA 98195, USA
| | - Gang Zhao
- Centre for Biomedical Engineering, Department of Electronic Science and Technology, University of Science and Technology of China, Hefei, Anhui 230027, China
| | - Xiaoming Zhou
- School of Mechanical, Electronic, and Industrial Engineering, University of Electronic Science and Technology of China, Chengdu, Sichuan 611731, China
| | - Zhiquan Shu
- Department of Mechanical Engineering, University of Washington, Seattle, WA 98195, USA
| | - Zhongping Huang
- Department of Biomedical Engineering, Widener University, Chester, PA 19013, USA
| | - Weiping Ding
- Centre for Biomedical Engineering, Department of Electronic Science and Technology, University of Science and Technology of China, Hefei, Anhui 230027, China
| | - Qingchuan Zhang
- CAS Key Laboratory of Mechanical Behavior and Design of Material, Department of Modern Mechanics, University of Science and Technology of China, Hefei, Anhui 230027, China
| | - Dayong Gao
- Department of Mechanical Engineering, University of Washington, Seattle, WA 98195, USA
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35
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Mallamace F, Corsaro C, Mallamace D, Vasic C, Stanley HE. The thermodynamical response functions and the origin of the anomalous behavior of liquid water. Faraday Discuss 2015; 167:95-108. [PMID: 24640487 DOI: 10.1039/c3fd00073g] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
The density maximum of water dominates the thermodynamics of the system under ambient conditions, is strongly P-dependent, and disappears at a crossover pressure P(cross) approximately 1.8 kbar. We study this variable across a wide area of the T-P phase diagram. We consider old and new data of both the isothermal compressibility K(T)(T, P), the pressure constant specific heat C(P)(T) and the coefficient of thermal expansion alpha(P) (T, P). We observe that K(T)(T) shows a minimum at T* approximately 315 +/- 5 K for all of the studied pressures, whereas, at the same temperature, C(P)(T) has the minimal variation as a function of P in the interval 1 bar-4 kbar. We find the behavior of alpha(P) also to be surprising: all the alpha(P)(T) curves measured at different P cross at T*. The experimental data show a "singular and universal expansivity point" at T* approximately 315 K and alpha(P)(T*) = 0.44 10(-3) K(-1). Unlike other water singularities, we find this temperature to be thermodynamically consistent in the relationship connecting the three response functions. By considering also the P-T behavior of the self-diffusion coefficient D(S) and of the NMR proton chemical shift delta we have the information that at T* the water local order points out, with decreasing T, the crossover from a normal fluid to the anomalous and complex liquid characterized by the many anomalies.
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36
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Abstract
The return of supercooled water to a stable equilibrium condition is an irreversible process which, in large enough samples, takes place adiabatically. We investigated this phenomenon in water by fast imaging techniques. As water freezes, large energy and density fluctuations promote the spatial coexistence of solid and liquid phases at different temperatures. Upon synchronously monitoring the time evolution of the local temperature, we observed a sharp dynamic transition between a fast and a slow decay regime at about 266.6 K. We construe the observed phenomenon in terms of the temperature dependence of heat transfers from solid and liquid volumes already at their bulk coexistence temperature towards adjacent still supercooled liquid regions. These findings can be justified by observing that convective motions induced by thermal gradients in a supercooled liquid near coexistence are rapidly suppressed as the nucleated solid fraction overcomes, at low enough temperatures, a characteristic percolation threshold.
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37
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Bogdan A, Loerting T. Phase separation during freezing upon warming of aqueous solutions. J Chem Phys 2014; 141:18C533. [DOI: 10.1063/1.4898379] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Affiliation(s)
- A. Bogdan
- Institute of Physical Chemistry, University of Innsbruck, Innrain 80/82, A-6020 Innsbruck, Austria
- Laboratory of Polymer Chemistry, Department of Chemistry, University of Helsinki, P.O. Box 55, FIN-00014 Helsinki, Finland
- Department of Physical Sciences, University of Helsinki, P.O. Box 64, FI-00014 Helsinki, Finland
| | - T. Loerting
- Institute of Physical Chemistry, University of Innsbruck, Innrain 80/82, A-6020 Innsbruck, Austria
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38
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Spiegel DR, Kollie PC, Van Tilburg SJ. Experimental tests of free-volume tracer diffusion in water and other solvents. J Chem Phys 2014; 140:104507. [PMID: 24628182 DOI: 10.1063/1.4867911] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Using forced Rayleigh scattering, the tracer diffusion of methyl red through water and eight other solvents at different temperatures is investigated and the results are compared to the Cohen-Turnbull theory of free-volume diffusion. In seven solvents the effective non-Arrhenius activation energy measured experimentally agrees with the Cohen-Turnbull energy. In water, however, the diffusion can be described mathematically by the free volume model but there is a disagreement of more than an order of magnitude between these energies. We propose that the unique "zero point" free volume forced onto water by the strong hydrogen bonding requires a different mechanism for tracer motion.
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Affiliation(s)
- Daniel R Spiegel
- Department of Physics and Astronomy, Trinity University, San Antonio, Texas 78212-7200, USA
| | - Paulses C Kollie
- Department of Physics and Astronomy, Trinity University, San Antonio, Texas 78212-7200, USA
| | - Scott J Van Tilburg
- Department of Physics and Astronomy, Trinity University, San Antonio, Texas 78212-7200, USA
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39
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Corsetti F, Artacho E, Soler JM, Alexandre SS, Fernández-Serra MV. Room temperature compressibility and diffusivity of liquid water from first principles. J Chem Phys 2013; 139:194502. [DOI: 10.1063/1.4832141] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
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40
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Sluyters JH, Sluyters-Rehbach M. Temperature Dependence of the Properties of Water and Its Solutes, Including the Supercooled Region. Chemphyschem 2013; 14:3788-800. [DOI: 10.1002/cphc.201300553] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2013] [Revised: 07/11/2013] [Indexed: 11/11/2022]
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41
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Réal F, Vallet V, Flament JP, Masella M. Revisiting a many-body model for water based on a single polarizable site: From gas phase clusters to liquid and air/liquid water systems. J Chem Phys 2013; 139:114502. [DOI: 10.1063/1.4821166] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
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42
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Picasso GC, Malaspina DC, Carignano MA, Szleifer I. Cooperative dynamic and diffusion behavior above and below the dynamical crossover of supercooled water. J Chem Phys 2013; 139:044509. [DOI: 10.1063/1.4816523] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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43
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Biddle JW, Holten V, Sengers JV, Anisimov MA. Thermal conductivity of supercooled water. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2013; 87:042302. [PMID: 23679409 DOI: 10.1103/physreve.87.042302] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2013] [Indexed: 06/02/2023]
Abstract
The heat capacity of supercooled water, measured down to -37°C, shows an anomalous increase as temperature decreases. The thermal diffusivity, i.e., the ratio of the thermal conductivity and the heat capacity per unit volume, shows a decrease. These anomalies may be associated with a hypothesized liquid-liquid critical point in supercooled water below the line of homogeneous nucleation. However, while the thermal conductivity is known to diverge at the vapor-liquid critical point due to critical density fluctuations, the thermal conductivity of supercooled water, calculated as the product of thermal diffusivity and heat capacity, does not show any sign of such an anomaly. We have used mode-coupling theory to investigate the possible effect of critical fluctuations on the thermal conductivity of supercooled water and found that indeed any critical thermal-conductivity enhancement would be too small to be measurable at experimentally accessible temperatures. Moreover, the behavior of thermal conductivity can be explained by the observed anomalies of the thermodynamic properties. In particular, we show that thermal conductivity should go through a minimum when temperature is decreased, as Kumar and Stanley observed in the TIP5P model of water. We discuss physical reasons for the striking difference between the behavior of thermal conductivity in water near the vapor-liquid and liquid-liquid critical points.
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Affiliation(s)
- John W Biddle
- Institute for Physical Science and Technology and Department of Chemical and Biomolecular Engineering, University of Maryland, College Park, Maryland 20742, USA
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