1
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Bone RA, Chung MKJ, Ponder JW, Riccardi D, Muzny C, Sundararaman R, Schwarz K. A new method to calculate broadband dielectric spectra of solvents from molecular dynamics simulations demonstrated with polarizable force fields. J Chem Phys 2024; 161:064306. [PMID: 39132799 PMCID: PMC11324330 DOI: 10.1063/5.0217883] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2024] [Accepted: 07/26/2024] [Indexed: 08/13/2024] Open
Abstract
Simulating the dielectric spectra of solvents requires the nuanced definition of inter- and intra-molecular forces. Non-polarizable force fields, while thoroughly benchmarked for dielectric applications, do not capture all the spectral features of solvents, such as water. Conversely, polarizable force fields have been largely untested in the context of dielectric spectroscopy but include charge and dipole fluctuations that contribute to intermolecular interactions. We benchmark non-polarizable force fields and the polarizable force fields AMOEBA03 and HIPPO for liquid water and find that the polarizable force fields can capture all the experimentally observed spectral features with varying degrees of accuracy. However, the non-polarizable force fields miss at least one peak. To diagnose this deficiency, we decompose the liquid water spectra from polarizable force fields at multiple temperatures into static and induced dipole contributions and find that the peak originates from induced dipole contributions. Broadening our inquiry to other solvents parameterized with the AMOEBA09 force field, we demonstrate good agreement between the experimental and simulated dielectric spectra of methanol and formamide. To produce these spectra, we develop a new computational approach to calculate the dielectric spectrum via the fluctuation dissipation theorem. This method minimizes the error in both the low and high frequency portions of the spectrum, improving the overall accuracy of the simulated spectrum and broadening the computed frequency range.
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Affiliation(s)
| | - Moses K. J. Chung
- Department of Chemistry, Washington University in St. Louis, St. Louis, Missouri 63130, USA
| | - Jay W. Ponder
- Department of Chemistry, Washington University in St. Louis, St. Louis, Missouri 63130, USA
| | - Demian Riccardi
- Material Measurement Laboratory, National Institute of Standards and Technology, 325 Broadway, Boulder, Colorado 80305, USA
| | - Chris Muzny
- Material Measurement Laboratory, National Institute of Standards and Technology, 325 Broadway, Boulder, Colorado 80305, USA
| | - Ravishankar Sundararaman
- Department of Materials Science and Engineering, Rensselaer Polytechnic Institute, 110 8th St., Troy, New York 12180, USA
| | - Kathleen Schwarz
- Material Measurement Laboratory, National Institute of Standards and Technology, 100 Bureau Dr., Gaithersburg, Maryland 20899, USA
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2
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Ludlam GH, Gnaniah SJP, Degl’Innocenti R, Gupta G, Wain AJ, Lin H. Measurement of Water Uptake and States in Nafion Membranes Using Humidity-Controlled Terahertz Time-Domain Spectroscopy. ACS SUSTAINABLE CHEMISTRY & ENGINEERING 2024; 12:7924-7934. [PMID: 38783844 PMCID: PMC11110106 DOI: 10.1021/acssuschemeng.4c01820] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/01/2024] [Revised: 04/18/2024] [Accepted: 04/22/2024] [Indexed: 05/25/2024]
Abstract
Perfluorinated sulfonic acid ionomers are well known for their unique water uptake properties and chemical/mechanical stability. Understanding their performance-stability trade-offs is key to realizing membranes with optimal properties. Terahertz time-domain spectroscopy has been demonstrated to resolve water states inside industrially relevant membranes, producing qualitatively agreeable results to conventional gravimetric analysis and prior demonstrations. Using the proposed humidity-controlled terahertz time-domain spectroscopy, here we quantify this detailed water information inside commercially available Nafion membranes at various humidities for direct comparison against literature values from dynamic vapor sorption, differential scanning calorimetry, and Fourier transform infrared spectroscopy on selected samples. Using this technique therefore opens up opportunities for rapid future parameter space investigation for membrane optimization.
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Affiliation(s)
| | - Sam J. P. Gnaniah
- National
Physical Laboratory, Hampton Road, Teddington, Middlesex TW11 0LW, U.K.
| | - Riccardo Degl’Innocenti
- Department
of Engineering, Lancaster University, Lancaster LA1 4YW, U.K.
- School
of Electronic Engineering and Computer Science, Queen Mary University of London, London, E1 4NS, U.K.
| | - Gaurav Gupta
- Department
of Engineering, Lancaster University, Lancaster LA1 4YW, U.K.
| | - Andrew J. Wain
- National
Physical Laboratory, Hampton Road, Teddington, Middlesex TW11 0LW, U.K.
| | - Hungyen Lin
- Department
of Engineering, Lancaster University, Lancaster LA1 4YW, U.K.
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3
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Novelli F. Terahertz spectroscopy of thick and diluted water solutions. OPTICS EXPRESS 2024; 32:11041-11056. [PMID: 38570962 DOI: 10.1364/oe.510393] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2023] [Accepted: 01/16/2024] [Indexed: 04/05/2024]
Abstract
While bright terahertz sources are used to perform nonlinear experiments, they can be advantageous for high-precision linear measurements of opaque samples. By placing the sample away from the focus, nonlinearities can be suppressed, and sizeable amounts of transmitted radiation detected. Here, this approach is demonstrated for a 0.5 mm thick layer of liquid water in a static sample holder. Variations of the index of refraction as small as (7 ± 2) · 10-4 were detected at 0.58 THz for an aqueous salt solution containing ten millimoles of sodium chloride. To my knowledge, this precision is unprecedented in time-domain spectroscopy studies of diluted aqueous systems or other optically thick and opaque materials.
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4
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Xie W, Tang Q, Xie J, Fei Y, Wan H, Zhao T, Ding T, Xiao X, Wen Q. Organohydrogel-based transparent terahertz absorber via ionic conduction loss. Nat Commun 2024; 15:38. [PMID: 38167819 PMCID: PMC10762151 DOI: 10.1038/s41467-023-44344-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Accepted: 12/09/2023] [Indexed: 01/05/2024] Open
Abstract
The fast-growing terahertz technologies require high-performance terahertz absorber for suppressing electromagnetic interference. Since the dissipation mechanism in terahertz band usually focuses on electronic conduction loss, almost all terahertz absorbers are constructed with electronically conducting materials being opaque, which limits their applications in scenarios requiring high visible transmittance. Here, we demonstrate a transparent terahertz absorber based on permittivity-gradient elastomer-encapsulated-organohydrogel. Our organohydrogel-based terahertz absorber exhibits a high absorbing property (average reflection loss of 49.03 dB) in 0.5-4.5 THz band with a thin thickness of 700 μm and a high average visible transmittance of 85.51%. The terahertz absorbing mechanism mainly derives from the ionic conduction loss of the polar liquid in organohydrogel. Besides, the hydrophobic and adhesive elastomer coating endows this terahertz absorber high absorbing stability and interfacial adhesivity. This work paves a viable way to designing transparent terahertz absorbers.
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Affiliation(s)
- Wenke Xie
- School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu, China
| | - Qian Tang
- School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu, China
| | - Jinlong Xie
- School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu, China
| | - Yang Fei
- School of Physics, University of Electronic Science and Technology of China, Chengdu, China
| | - Hujie Wan
- School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu, China
| | - Tao Zhao
- School of Physics, University of Electronic Science and Technology of China, Chengdu, China
- State Key Laboratory of Electronic Thin Film and Integrated Devices, University of Electronic Science and Technology of China, Chengdu, China
- Shenzhen Institute for Advanced Study, University of Electronic Science and Technology of China, Shenzhen, China
- Chengdu Research Institute, University of Electronic Science and Technology of China, Chengdu, China
| | - Tianpeng Ding
- School of Physics, University of Electronic Science and Technology of China, Chengdu, China.
- State Key Laboratory of Electronic Thin Film and Integrated Devices, University of Electronic Science and Technology of China, Chengdu, China.
| | - Xu Xiao
- School of Physics, University of Electronic Science and Technology of China, Chengdu, China.
- State Key Laboratory of Electronic Thin Film and Integrated Devices, University of Electronic Science and Technology of China, Chengdu, China.
| | - Qiye Wen
- School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu, China.
- State Key Laboratory of Electronic Thin Film and Integrated Devices, University of Electronic Science and Technology of China, Chengdu, China.
- Shenzhen Institute for Advanced Study, University of Electronic Science and Technology of China, Shenzhen, China.
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5
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Reddy IVAK, Elmaadawy S, Furlani EP, Jornet JM. Photothermal effects of terahertz-band and optical electromagnetic radiation on human tissues. Sci Rep 2023; 13:14643. [PMID: 37669995 PMCID: PMC10480473 DOI: 10.1038/s41598-023-41808-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Accepted: 08/31/2023] [Indexed: 09/07/2023] Open
Abstract
The field of wireless communication has witnessed tremendous advancements in the past few decades, leading to more pervasive and ubiquitous networks. Human bodies are continually exposed to electromagnetic radiation, but typically this does not impact the body as the radiation is non-ionizing and the waves carry low power. However, with progress in the sixth generation (6G) of wireless networks and the adoption of the spectrum above 100 GHz in the next few years, higher power radiation is needed to cover larger areas, exposing humans to stronger and more prolonged radiation. Also, water has a high absorption coefficient at these frequencies and could lead to thermal effects on the skin. Hence, there is a need to study the radiation effects on human tissues, specifically the photothermal effects. In this paper, we present a custom-built, multi-physics model to investigate electromagnetic wave propagation in human tissue and study its subsequent photothermal effects. The proposed finite-element model consists of two segments-the first one estimates the intensity distribution along the beam path, while the second calculates the increase in temperature due to the wave distribution inside the tissue. We determine the intensity variation in the tissue using the radiative transfer equation and compare the results with Monte Carlo analysis and existing analytical models. The intensity information is then utilized to predict the rise in temperature with a bio-heat transfer module, powered by Pennes' bioheat equation. The model is parametric, and we perform a systematic photothermal analysis to recognize the crucial variables responsible for the temperature growth inside the tissue, particularly for terahertz and near-infrared optical frequencies. Our numerical model can serve as a benchmark for studying the high-frequency radiation effects on complex heterogeneous media such as human tissue.
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Affiliation(s)
- Innem V A K Reddy
- Department of Electrical Engineering, University at Buffalo, Buffalo, NY, USA
- Biological and Environmental Science and Engineering Division, King Abdullah University of Science and Technology, Thuwal, Saudi Arabia
| | - Samar Elmaadawy
- Department of Electrical and Computer Engineering, Northeastern University, Boston, MA, USA
| | - Edward P Furlani
- Department of Electrical Engineering, University at Buffalo, Buffalo, NY, USA
| | - Josep M Jornet
- Department of Electrical and Computer Engineering, Northeastern University, Boston, MA, USA.
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6
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Zhang M, Xiao W, Zhang C, Zhang L. Terahertz Kerr Effect of Liquids. SENSORS (BASEL, SWITZERLAND) 2022; 22:9424. [PMID: 36502125 PMCID: PMC9739268 DOI: 10.3390/s22239424] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Revised: 11/24/2022] [Accepted: 11/30/2022] [Indexed: 06/17/2023]
Abstract
In recent years, tremendous advancements have been made in various technologies such as far-infrared, low-frequency Raman, and two-dimensional (2D) Raman terahertz (THz) spectroscopies. A coherent method has emerged from numerous experimental and theoretical investigations of molecular dynamics in liquids by comparing linear and non-linear spectroscopic techniques. Intermolecular hydrogen bond vibration, molecular reorientation motion, and interaction between molecule/ionic solute and hydrogen bonds have been demonstrated to occur in the THz region, which are closely related to their physical/chemical properties and structural dynamics. However, precise probing of various modes of motion is difficult because of the complexity of the collective and cooperative motion of molecules and spectral overlap of related modes. With the development of THz science and technology, current state-of-the-art THz sources can generate pulsed electric fields with peak intensities of the order of microvolts per centimeter (MV/cm). Such strong fields enable the use of THz waves as the light source for non-linear polarization of the medium and in turn leads to the development of the emerging THz Kerr effect (TKE) technique. Many low-frequency molecular motions, such as the collective directional motion of molecules and cooperative motion under the constraint of weak intermolecular interactions, are resonantly excited by an intense THz electric field. Thus, the TKE technique provides an interesting prospect for investigating low-frequency dynamics of different media. In view of this, this paper first summarizes the research work on TKE spectroscopy by taking a solid material without low-frequency molecular motions as an example. Starting from the principle of TKE technology and its application in investigating the properties of solid matter, we have explored the low-frequency molecular dynamics of liquid water and aqueous solutions using TKE. Liquid water is a core of life and possesses many extraordinary physical and biochemical properties. The hydrogen bond network plays a crucial role in these properties and is the main reason for its various kinetic and thermodynamic properties, which differ from those of other liquids. However, the structure of the hydrogen bond network between water and solutes is not well known. Therefore, evaluating the hydrogen bond-related kinetic properties of liquid water is important.
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7
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Zhang MH, Xiao W, Wang WM, Zhang R, Zhang CL, Zhang XC, Zhang LL. Highly sensitive detection of broadband terahertz waves using aqueous salt solutions. OPTICS EXPRESS 2022; 30:39142-39151. [PMID: 36258461 DOI: 10.1364/oe.472753] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/08/2022] [Accepted: 09/23/2022] [Indexed: 06/16/2023]
Abstract
Water-based coherent detection of broadband terahertz (THz) wave has been recently proposed with superior performances, which can alleviate the limited detection bandwidth and high probe laser energy requirement in the solid- and air-based detection schemes, respectively. Here, we demonstrate that the water-based detection method can be extended to the aqueous salt solutions and the sensitivity can be significantly enhanced. The THz coherent detection signal intensity scales linearly with the third-order nonlinear susceptibility χ(3) or quadratically with the linear refractive index η0 of the aqueous salt solutions, while the incoherent detection signal intensity scales quadratically with χ(3) or quartically with η0, proving the underlying mechanism is the four-wave mixing. Both the coherent and incoherent detection signal intensities appear positive correlation with the solution concentration. These results imply that the liquid-based THz detection scheme could provide a new technique to measure χ(3) and further investigate the physicochemical properties in the THz band for various liquids.
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8
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Singh A, Doan LC, Lou D, Wen C, Vinh NQ. Interfacial Layers between Ion and Water Detected by Terahertz Spectroscopy. J Chem Phys 2022; 157:054501. [DOI: 10.1063/5.0095932] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Dynamic fluctuations in hydrogen-bond network of water occur from femto- to nano-second timescale and provides insights into structural/dynamical aspects of water at ion-water interfaces. Employing terahertz spectroscopy assisted with molecular dynamics simulations, we study aqueous chloride solutions of five monovalent cations, namely, Li, Na, K, Rb and Cs. We show that ions modify the behavior of surrounding water molecules and form interfacial layers of water around them with physical properties distinct from that of bulk water. Small cations with high charge densities influence the kinetics of water well beyond the first solvation shell. At terahertz frequencies, we observe an emergence of fast relaxation processes of water with their magnitude following the ionic order Cs>Rb>K>Na>Li, revealing an enhanced population density of weakly coordinated water at ion-water interface. The results shed light on the structure breaking tendency of monovalent cations and provide insights into the properties of ionic solutions at the molecular level.
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Affiliation(s)
- Abhishek Singh
- Physics, Virginia Polytechnic Institute and State University, United States of America
| | - Luan C Doan
- Virginia Polytechnic Institute and State University, United States of America
| | - Djamila Lou
- Virginia Polytechnic Institute and State University, United States of America
| | - Chengyuan Wen
- Virginia Polytechnic Institute and State University - National Capital Region, United States of America
| | - Nguyen Q Vinh
- Department of Physics, Virginia Polytechnic Institute and State University, United States of America
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9
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Jiang L, Zhang K, Yao Y, Li S, Li J, Tian Z, Zhang W. Terahertz optoacoustic detection of aqueous salt solutions. iScience 2022; 25:104668. [PMID: 35832895 PMCID: PMC9272373 DOI: 10.1016/j.isci.2022.104668] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2021] [Revised: 05/30/2022] [Accepted: 06/21/2022] [Indexed: 11/29/2022] Open
Affiliation(s)
- Liwen Jiang
- School of Precision Instruments and Optoelectronics Engineering, Tianjin University, No.92 Weijin Road, Nankai District, Tianjin 300072, China
- Center for Terahertz Waves, Tianjin University, No.92 Weijin Road, Nankai District, Tianjin 300072, China
- Key Laboratory of Optoelectronics Information and Technology (Ministry of Education), No.92 Weijin Road, Nankai District, Tianjin 300072, China
| | - Ke Zhang
- School of Precision Instruments and Optoelectronics Engineering, Tianjin University, No.92 Weijin Road, Nankai District, Tianjin 300072, China
- Center for Terahertz Waves, Tianjin University, No.92 Weijin Road, Nankai District, Tianjin 300072, China
- Key Laboratory of Optoelectronics Information and Technology (Ministry of Education), No.92 Weijin Road, Nankai District, Tianjin 300072, China
| | - Yixin Yao
- School of Precision Instruments and Optoelectronics Engineering, Tianjin University, No.92 Weijin Road, Nankai District, Tianjin 300072, China
- Center for Terahertz Waves, Tianjin University, No.92 Weijin Road, Nankai District, Tianjin 300072, China
- Key Laboratory of Optoelectronics Information and Technology (Ministry of Education), No.92 Weijin Road, Nankai District, Tianjin 300072, China
| | - Shuai Li
- School of Precision Instruments and Optoelectronics Engineering, Tianjin University, No.92 Weijin Road, Nankai District, Tianjin 300072, China
| | - Jiao Li
- School of Precision Instruments and Optoelectronics Engineering, Tianjin University, No.92 Weijin Road, Nankai District, Tianjin 300072, China
- Corresponding author
| | - Zhen Tian
- School of Precision Instruments and Optoelectronics Engineering, Tianjin University, No.92 Weijin Road, Nankai District, Tianjin 300072, China
- Center for Terahertz Waves, Tianjin University, No.92 Weijin Road, Nankai District, Tianjin 300072, China
- Key Laboratory of Optoelectronics Information and Technology (Ministry of Education), No.92 Weijin Road, Nankai District, Tianjin 300072, China
- Corresponding author
| | - Weili Zhang
- School of Electrical and Computer Engineering, Oklahoma State University, Stillwater, OK 74078, USA
- Corresponding author
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10
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Attenuated Total Reflection at THz Wavelengths: Prospective Use of Total Internal Reflection and Polariscopy. APPLIED SCIENCES-BASEL 2021. [DOI: 10.3390/app11167632] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Capabilities of the attenuated total reflection (ATR) at THz wavelengths for increased sub-surface depth characterisation of (bio-)materials are presented. The penetration depth of a THz evanescent wave in biological samples is dependent on the wavelength and temperature and can reach 0.1–0.5 mm depth, due to the strong refractive index change ∼0.4 of the ice-water transition; this is quite significant and important when studying biological samples. Technical challenges are discussed when using ATR for uneven, heterogeneous, high refractive index samples with the possibility of frustrated total internal reflection (a breakdown of the ATR reflection mode into transmission mode). Local field enhancements at the interface are discussed with numerical/analytical examples. Maxwell’s scaling is used to model the behaviour of absorber–scatterer inside the materials at the interface with the ATR prism for realistic complex refractive indices of bio-materials. The modality of ATR with a polarisation analysis is proposed, and its principle is illustrated, opening an invitation for its experimental validation. The sensitivity of the polarised ATR mode to the refractive index between the sample and ATR prism is numerically modelled and experimentally verified for background (air) spectra. The design principles of polarisation active optical elements and spectral filters are outlined. The results and proposed concepts are based on experimental conditions at the THz beamline of the Australian Synchrotron.
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11
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Bubon TL, Perepelytsya SM. Low-frequency vibrations of water molecules in DNA minor groove. THE EUROPEAN PHYSICAL JOURNAL. E, SOFT MATTER 2021; 44:84. [PMID: 34165657 DOI: 10.1140/epje/s10189-021-00080-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2020] [Accepted: 05/18/2021] [Indexed: 06/13/2023]
Abstract
Water molecules around the DNA form the hydration shell having different structural and dynamical features in different regions of the double helix. In the DNA minor groove, water molecules are highly ordered and in the case of AT nucleotide sequence, the formation of a hydration spine is observed. In the present research, the vibrations of the hydration spine have been studied to establish the mode of translational vibrations of water molecules in the DNA low-frequency spectra (water-spine vibrations). Using the developed phenomenological model with the parameters determined for different nucleotides of the DNA fragment CGCGAATTCGCG, the frequencies of vibrations of the hydration spine have been obtained within 185 ± 20 cm[Formula: see text] depending on type of nucleotide. The obtained frequencies are in the same region as the translational vibrations of water molecules in the bulk. To select the mode of water-spine vibrations from those modes that are present in the bulk water, the dynamics of DNA with different nucleotide contents has been analyzed, and the possible influence of heavy water has been estimated. The determined features of the mode of water vibrations in the hydration spine of DNA minor groove indicate that this mode may be observed in the experimental spectra.
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Affiliation(s)
- T L Bubon
- Bogolyubov Institute for Theoretical Physics of the National Academy of Sciences of Ukraine, 14-b, Metrolohichna Str., Kiev, 03143, Ukraine.
| | - S M Perepelytsya
- Bogolyubov Institute for Theoretical Physics of the National Academy of Sciences of Ukraine, 14-b, Metrolohichna Str., Kiev, 03143, Ukraine
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12
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Zhao H, Tan Y, Zhang L, Zhang R, Shalaby M, Zhang C, Zhao Y, Zhang XC. Ultrafast hydrogen bond dynamics of liquid water revealed by terahertz-induced transient birefringence. LIGHT, SCIENCE & APPLICATIONS 2020; 9:136. [PMID: 32802323 PMCID: PMC7403349 DOI: 10.1038/s41377-020-00370-z] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2019] [Revised: 07/04/2020] [Accepted: 07/13/2020] [Indexed: 05/02/2023]
Abstract
The fundamental properties of water molecules, such as their molecular polarizability, have not yet been clarified. The hydrogen bond network is generally considered to play an important role in the thermodynamic properties of water. The terahertz (THz) Kerr effect technique, as a novel tool, is expected to be useful in exploring the low-frequency molecular dynamics of liquid water. Here, we use an intense and ultrabroadband THz pulse (peak electric field strength of 14.9 MV/cm, centre frequency of 3.9 THz, and bandwidth of 1-10 THz) to resonantly excite intermolecular modes of liquid water. Bipolar THz field-induced transient birefringence signals are observed in a free-flowing water film. We propose a hydrogen bond harmonic oscillator model associated with the dielectric susceptibility and combine it with the Lorentz dynamic equation to investigate the intermolecular structure and dynamics of liquid water. We mainly decompose the bipolar signals into a positive signal caused by hydrogen bond stretching vibration and a negative signal caused by hydrogen bond bending vibration, indicating that the polarizability perturbation of water presents competing contributions under bending and stretching conditions. A Kerr coefficient equation related to the intermolecular modes of water is established. The ultrafast intermolecular hydrogen bond dynamics of water revealed by an ultrabroadband THz pump pulse can provide further insights into the transient structure of liquid water corresponding to the pertinent modes.
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Affiliation(s)
- Hang Zhao
- Beijing Key Laboratory for Precision Optoelectronic Measurement Instrument and Technology, School of Optics and Photonics, Beijing Institute of Technology, Beijing, 100081 China
| | - Yong Tan
- Beijing Key Laboratory for Precision Optoelectronic Measurement Instrument and Technology, School of Optics and Photonics, Beijing Institute of Technology, Beijing, 100081 China
| | - Liangliang Zhang
- Beijing Advanced Innovation Center for Imaging Technology and Key Laboratory of Terahertz Optoelectronics (MoE), Department of Physics, Capital Normal University, Beijing, 100048 China
| | - Rui Zhang
- Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055 China
| | - Mostafa Shalaby
- Beijing Advanced Innovation Center for Imaging Technology and Key Laboratory of Terahertz Optoelectronics (MoE), Department of Physics, Capital Normal University, Beijing, 100048 China
| | - Cunlin Zhang
- Beijing Advanced Innovation Center for Imaging Technology and Key Laboratory of Terahertz Optoelectronics (MoE), Department of Physics, Capital Normal University, Beijing, 100048 China
| | - Yuejin Zhao
- Beijing Key Laboratory for Precision Optoelectronic Measurement Instrument and Technology, School of Optics and Photonics, Beijing Institute of Technology, Beijing, 100081 China
| | - Xi-Cheng Zhang
- The Institute of Optics, University of Rochester, Rochester, NY 14627 USA
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13
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Dedic J, Okur HI, Roke S. Polyelectrolytes induce water-water correlations that result in dramatic viscosity changes and nuclear quantum effects. SCIENCE ADVANCES 2019; 5:eaay1443. [PMID: 32064319 PMCID: PMC6989307 DOI: 10.1126/sciadv.aay1443] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2019] [Accepted: 10/22/2019] [Indexed: 05/28/2023]
Abstract
Ions interact with water via short-ranged ion-dipole interactions. Recently, an additional unexpected long-ranged interaction was found: The total electric field of ions influences water-water correlations over tens of hydration shells, leading to the Jones Ray effect, a 0.3% surface tension depression. Here, we report such long-range interactions contributing substantially to both molecular and macroscopic properties. Femtosecond elastic second harmonic scattering (fs-ESHS) shows that long-range electrostatic interactions are remarkably strong in aqueous polyelectrolyte solutions, leading to an increase in water-water correlations. This increase plays a role in the reduced viscosity, which changes more than two orders of magnitude with polyelectrolyte concentration. Using D2O instead of H2O shifts both the fs-ESHS and the viscosity curve by a factor of ~10 and reduces the maximum viscosity value by 20 to 300%, depending on the polyelectrolyte. These phenomena cannot be explained using a mean-field approximation of the solvent and point to nuclear quantum effects.
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14
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Hoshina H, Iwasaki Y, Katahira E, Okamoto M, Otani C. Structure and dynamics of bound water in poly(ethylene-vinylalcohol) copolymers studied by terahertz spectroscopy. POLYMER 2018. [DOI: 10.1016/j.polymer.2018.06.020] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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15
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Zalden P, Song L, Wu X, Huang H, Ahr F, Mücke OD, Reichert J, Thorwart M, Mishra PK, Welsch R, Santra R, Kärtner FX, Bressler C. Molecular polarizability anisotropy of liquid water revealed by terahertz-induced transient orientation. Nat Commun 2018; 9:2142. [PMID: 29849173 PMCID: PMC5976729 DOI: 10.1038/s41467-018-04481-5] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2017] [Accepted: 04/27/2018] [Indexed: 12/11/2022] Open
Abstract
Reaction pathways of biochemical processes are influenced by the dissipative electrostatic interaction of the reagents with solvent water molecules. The simulation of these interactions requires a parametrization of the permanent and induced dipole moments. However, the underlying molecular polarizability of water and its dependence on ions are partially unknown. Here, we apply intense terahertz pulses to liquid water, whose oscillations match the timescale of orientational relaxation. Using a combination of terahertz pump / optical probe experiments, molecular dynamics simulations, and a Langevin dynamics model, we demonstrate a transient orientation of their dipole moments, not possible by optical excitation. The resulting birefringence reveals that the polarizability of water is lower along its dipole moment than the average value perpendicular to it. This anisotropy, also observed in heavy water and alcohols, increases with the concentration of sodium iodide dissolved in water. Our results enable a more accurate parametrization and a benchmarking of existing and future water models. The intermolecular dynamics of liquid water impact most biological processes. Here, the authors use intense terahertz electromagnetic pulses to generate a transient, out-of-equilibrium state of the water network to show that the molecules become oriented and probe the polarizability of this anisotropic state.
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Affiliation(s)
- Peter Zalden
- Centre for Ultrafast Imaging CUI, University of Hamburg, 22761, Hamburg, Germany. .,European XFEL, Holzkoppel 4, 22869, Schenefeld, Germany.
| | - Liwei Song
- Center for Free-Electron Laser Science CFEL, Deutsches Elektronen-Synchrotron, 22607, Hamburg, Germany.,State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, 201800, Shanghai, China
| | - Xiaojun Wu
- Center for Free-Electron Laser Science CFEL, Deutsches Elektronen-Synchrotron, 22607, Hamburg, Germany.,School of Electronic and Information Engineering, Beihang University, 100191, Beijing, China
| | - Haoyu Huang
- Center for Free-Electron Laser Science CFEL, Deutsches Elektronen-Synchrotron, 22607, Hamburg, Germany
| | - Frederike Ahr
- Center for Free-Electron Laser Science CFEL, Deutsches Elektronen-Synchrotron, 22607, Hamburg, Germany
| | - Oliver D Mücke
- Centre for Ultrafast Imaging CUI, University of Hamburg, 22761, Hamburg, Germany.,Center for Free-Electron Laser Science CFEL, Deutsches Elektronen-Synchrotron, 22607, Hamburg, Germany
| | - Joscha Reichert
- Centre for Ultrafast Imaging CUI, University of Hamburg, 22761, Hamburg, Germany.,I. Institut für Theoretische Physik, University of Hamburg, Jungiusstr. 9, 20355, Hamburg, Germany
| | - Michael Thorwart
- Centre for Ultrafast Imaging CUI, University of Hamburg, 22761, Hamburg, Germany.,I. Institut für Theoretische Physik, University of Hamburg, Jungiusstr. 9, 20355, Hamburg, Germany
| | - Pankaj Kr Mishra
- Centre for Ultrafast Imaging CUI, University of Hamburg, 22761, Hamburg, Germany.,Center for Free-Electron Laser Science CFEL, Deutsches Elektronen-Synchrotron, 22607, Hamburg, Germany
| | - Ralph Welsch
- Center for Free-Electron Laser Science CFEL, Deutsches Elektronen-Synchrotron, 22607, Hamburg, Germany
| | - Robin Santra
- Centre for Ultrafast Imaging CUI, University of Hamburg, 22761, Hamburg, Germany.,Center for Free-Electron Laser Science CFEL, Deutsches Elektronen-Synchrotron, 22607, Hamburg, Germany.,Department of Physics, University of Hamburg, Jungiusstr. 9, 20355, Hamburg, Germany
| | - Franz X Kärtner
- Centre for Ultrafast Imaging CUI, University of Hamburg, 22761, Hamburg, Germany.,Center for Free-Electron Laser Science CFEL, Deutsches Elektronen-Synchrotron, 22607, Hamburg, Germany
| | - Christian Bressler
- Centre for Ultrafast Imaging CUI, University of Hamburg, 22761, Hamburg, Germany.,European XFEL, Holzkoppel 4, 22869, Schenefeld, Germany
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16
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Pal S, Samanta N, Das Mahanta D, Mitra RK, Chattopadhyay A. Effect of Phospholipid Headgroup Charge on the Structure and Dynamics of Water at the Membrane Interface: A Terahertz Spectroscopic Study. J Phys Chem B 2018. [DOI: 10.1021/acs.jpcb.8b01633] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Sreetama Pal
- Academy of Scientific and Innovative Research, India
- CSIR-Indian Institute of Chemical Technology, Uppal Road, Hyderabad 500 007, India
| | - Nirnay Samanta
- S.N. Bose National Centre for Basic Sciences, Block JD, Sector III, Salt Lake, Kolkata 700 106, India
| | - Debasish Das Mahanta
- S.N. Bose National Centre for Basic Sciences, Block JD, Sector III, Salt Lake, Kolkata 700 106, India
| | - Rajib Kumar Mitra
- S.N. Bose National Centre for Basic Sciences, Block JD, Sector III, Salt Lake, Kolkata 700 106, India
| | - Amitabha Chattopadhyay
- CSIR-Centre for Cellular and Molecular Biology, Uppal Road, Hyderabad 500 007, India
- Academy of Scientific and Innovative Research, India
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17
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Interpretation of the GHz to THz dielectric relaxation dynamics of water in the framework of the Coupling Model. J Mol Liq 2018. [DOI: 10.1016/j.molliq.2018.01.039] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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18
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Lunkenheimer P, Emmert S, Gulich R, Köhler M, Wolf M, Schwab M, Loidl A. Electromagnetic-radiation absorption by water. Phys Rev E 2017; 96:062607. [PMID: 29347319 DOI: 10.1103/physreve.96.062607] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2017] [Indexed: 06/07/2023]
Abstract
Why does a microwave oven work? How does biological tissue absorb electromagnetic radiation? Astonishingly, we do not have a definite answer to these simple questions because the microscopic processes governing the absorption of electromagnetic waves by water are largely unclarified. This absorption can be quantified by dielectric loss spectra, which reveal a huge peak at a frequency of the exciting electric field of about 20 GHz and a gradual tailing off toward higher frequencies. The microscopic interpretation of such spectra is highly controversial and various superpositions of relaxation and resonance processes ascribed to single-molecule or molecule-cluster motions have been proposed for their analysis. By combining dielectric, microwave, THz, and far-infrared spectroscopy, here we provide nearly continuous temperature-dependent broadband spectra of water. Moreover, we find that corresponding spectra for aqueous solutions reveal the same features as pure water. However, in contrast to the latter, crystallization in these solutions can be avoided by supercooling. As different spectral contributions tend to disentangle at low temperatures, this enables us to deconvolute them when approaching the glass transition under cooling. We find that the overall spectral development, including the 20 GHz feature (employed for microwave heating), closely resembles the behavior known for common supercooled liquids. Thus water's absorption of electromagnetic waves at room temperature is not unusual but very similar to that of glass-forming liquids at elevated temperatures, deep in the low-viscosity liquid regime, and should be interpreted along similar lines.
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Affiliation(s)
- P Lunkenheimer
- Experimental Physics V, Center for Electronic Correlations and Magnetism, University of Augsburg, 86159 Augsburg, Germany
| | - S Emmert
- Experimental Physics V, Center for Electronic Correlations and Magnetism, University of Augsburg, 86159 Augsburg, Germany
| | - R Gulich
- Experimental Physics V, Center for Electronic Correlations and Magnetism, University of Augsburg, 86159 Augsburg, Germany
| | - M Köhler
- Experimental Physics V, Center for Electronic Correlations and Magnetism, University of Augsburg, 86159 Augsburg, Germany
| | - M Wolf
- Experimental Physics V, Center for Electronic Correlations and Magnetism, University of Augsburg, 86159 Augsburg, Germany
| | - M Schwab
- Experimental Physics V, Center for Electronic Correlations and Magnetism, University of Augsburg, 86159 Augsburg, Germany
| | - A Loidl
- Experimental Physics V, Center for Electronic Correlations and Magnetism, University of Augsburg, 86159 Augsburg, Germany
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19
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Kaatze U. Dielectric and structural relaxation in water and some monohydric alcohols. J Chem Phys 2017; 147:024502. [DOI: 10.1063/1.4991850] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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20
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Samanta N, Das Mahanta D, Choudhury S, Barman A, Kumar Mitra R. Collective hydration dynamics in some amino acid solutions: A combined GHz-THz spectroscopic study. J Chem Phys 2017; 146:125101. [DOI: 10.1063/1.4978900] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Nirnay Samanta
- Department of Chemical, Biological and Macromolecular Sciences, S. N. Bose National Centre for Basic Sciences, Block JD, Sector III, Salt Lake, Kolkata 700106, India
| | - Debasish Das Mahanta
- Department of Chemical, Biological and Macromolecular Sciences, S. N. Bose National Centre for Basic Sciences, Block JD, Sector III, Salt Lake, Kolkata 700106, India
| | - Samiran Choudhury
- Department of Condensed Matter Physics and Material Sciences, S. N. Bose National Centre for Basic Sciences, Block JD, Sector III, Salt Lake, Kolkata 700106, India
| | - Anjan Barman
- Department of Condensed Matter Physics and Material Sciences, S. N. Bose National Centre for Basic Sciences, Block JD, Sector III, Salt Lake, Kolkata 700106, India
| | - Rajib Kumar Mitra
- Department of Chemical, Biological and Macromolecular Sciences, S. N. Bose National Centre for Basic Sciences, Block JD, Sector III, Salt Lake, Kolkata 700106, India
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21
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El Khoury Y, Hellwig P. Far infrared spectroscopy of hydrogen bonding collective motions in complex molecular systems. Chem Commun (Camb) 2017; 53:8389-8399. [DOI: 10.1039/c7cc03496b] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Far infrared spectroscopy as a tool for the study of inter and intramolecular interactions in complex molecular structures.
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Affiliation(s)
- Youssef El Khoury
- Laboratoire de Bioélectrochimie et Spectroscopie
- UMR 7140
- CMC
- Université de Strasbourg CNRS
- Strasbourg
| | - Petra Hellwig
- Laboratoire de Bioélectrochimie et Spectroscopie
- UMR 7140
- CMC
- Université de Strasbourg CNRS
- Strasbourg
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22
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Elton DC. The origin of the Debye relaxation in liquid water and fitting the high frequency excess response. Phys Chem Chem Phys 2017; 19:18739-18749. [DOI: 10.1039/c7cp02884a] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Debye relaxation in the microwave/THz region of the dielectric spectra of water is related to propagation of defects.
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Affiliation(s)
- Daniel C. Elton
- Department of Physics and Astronomy
- Stony Brook University
- Stony Brook
- USA
- Institute for Advanced Computational Sciences
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23
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Das Mahanta D, Patra A, Samanta N, Luong TQ, Mukherjee B, Mitra RK. Non-monotonic dynamics of water in its binary mixture with 1,2-dimethoxy ethane: A combined THz spectroscopic and MD simulation study. J Chem Phys 2016; 145:164501. [DOI: 10.1063/1.4964857] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Affiliation(s)
- Debasish Das Mahanta
- Chemical, Biological and Macromolecular Sciences, S. N. Bose National Centre for Basic Sciences, Block-JD, Sector-III, Salt Lake, Kolkata 700106, India
| | - Animesh Patra
- Chemical, Biological and Macromolecular Sciences, S. N. Bose National Centre for Basic Sciences, Block-JD, Sector-III, Salt Lake, Kolkata 700106, India
| | - Nirnay Samanta
- Chemical, Biological and Macromolecular Sciences, S. N. Bose National Centre for Basic Sciences, Block-JD, Sector-III, Salt Lake, Kolkata 700106, India
| | - Trung Quan Luong
- Department of Physical Chemistry II, Ruhr-University Bochum, 44780 Bochum, Germany
| | - Biswaroop Mukherjee
- Thematic Unit for Excellence–Computational Materials Science, S. N. Bose National Centre for Basic Sciences, Block-JD, Sector-III, Salt Lake, Kolkata 700106, India
| | - Rajib Kumar Mitra
- Chemical, Biological and Macromolecular Sciences, S. N. Bose National Centre for Basic Sciences, Block-JD, Sector-III, Salt Lake, Kolkata 700106, India
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24
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25
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George DK, Charkhesht A, Vinh NQ. New terahertz dielectric spectroscopy for the study of aqueous solutions. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2015; 86:123105. [PMID: 26724004 DOI: 10.1063/1.4936986] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
We present the development of a high precision, tunable far-infrared (terahertz) frequency-domain dielectric spectrometer for studying the dynamics of biomolecules in aqueous solutions in the gigahertz-to-terahertz frequency. As an important benchmark system, we report on the measurements of the absorption and refractive index for liquid water in the frequency range from 5 GHz to 1.12 THz (0.17-37.36 cm(-1) or 0.268-60 mm). The system provides a coherent radiation source with power up to 20 mW in the gigahertz-to-terahertz region. The dynamic range of our instrument reaches 10(12) and the system achieves a spectral resolution of less than 100 Hz. The temperature of samples can be controlled precisely with error bars of ±0.02 °C from 0 °C to 90 °C. Given these attributes, our spectrometer provides unique capabilities for the accurate measurement of even very strongly absorbing materials such as aqueous solutions.
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Affiliation(s)
- Deepu K George
- Department of Physics, Virginia Tech, Blacksburg, Virginia 24061, USA
| | - Ali Charkhesht
- Department of Physics, Virginia Tech, Blacksburg, Virginia 24061, USA
| | - N Q Vinh
- Department of Physics, Virginia Tech, Blacksburg, Virginia 24061, USA
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26
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Samanta N, Mahanta DD, Mitra RK. Collective hydration dynamics of guanidinium chloride solutions and its possible role in protein denaturation: a terahertz spectroscopic study. Phys Chem Chem Phys 2015; 16:23308-15. [PMID: 25259383 DOI: 10.1039/c4cp03273j] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
The remarkable ability of guanidinium chloride (GdmCl) to denature proteins is a well studied yet controversial phenomenon; the exact molecular mechanism is still debatable, especially the role of hydration dynamics, which has been paid less attention. In the present contribution, we have addressed the issue of whether the collective hydrogen bond dynamics of water gets perturbed in the presence of GdmCl and its possible impact on the denaturation of a globular protein human serum albumin (HSA), using terahertz (THz) time domain spectroscopy (TTDS) in the frequency range of 0.3-2.0 THz. The collective hydrogen bond dynamics is determined by fitting the obtained complex dielectric response in a multiple Debye relaxation model. To compare the results, the studies were extended to two more salts: tetramethylguanidinium chloride (TMGdmCl) and sodium chloride (NaCl). It was concluded that the change in hydration dynamics plays a definite role in the protein denaturation process.
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Affiliation(s)
- Nirnay Samanta
- Department of Chemical, Biological and Macromolecular Sciences, S.N. Bose National Centre for Basic Sciences, Block JD, Sector III, Salt Lake, Kolkata 700098, India.
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27
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Vinh NQ, Sherwin MS, Allen SJ, George DK, Rahmani AJ, Plaxco KW. High-precision gigahertz-to-terahertz spectroscopy of aqueous salt solutions as a probe of the femtosecond-to-picosecond dynamics of liquid water. J Chem Phys 2015; 142:164502. [DOI: 10.1063/1.4918708] [Citation(s) in RCA: 72] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Affiliation(s)
- N. Q. Vinh
- Institute for Terahertz Science and Technology, University of California, Santa Barbara, Santa Barbara, California 93106, USA
- Department of Physics, University of California, Santa Barbara, Santa Barbara, California 93106, USA
- Department of Physics, Virginia Tech, Blacksburg, Virginia 24061, USA
| | - Mark S. Sherwin
- Institute for Terahertz Science and Technology, University of California, Santa Barbara, Santa Barbara, California 93106, USA
- Department of Physics, University of California, Santa Barbara, Santa Barbara, California 93106, USA
| | - S. James Allen
- Institute for Terahertz Science and Technology, University of California, Santa Barbara, Santa Barbara, California 93106, USA
- Department of Physics, University of California, Santa Barbara, Santa Barbara, California 93106, USA
| | - D. K. George
- Department of Physics, Virginia Tech, Blacksburg, Virginia 24061, USA
| | - A. J. Rahmani
- Department of Physics, Virginia Tech, Blacksburg, Virginia 24061, USA
| | - Kevin W. Plaxco
- Institute for Terahertz Science and Technology, University of California, Santa Barbara, Santa Barbara, California 93106, USA
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, Santa Barbara, California 93106, USA
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28
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Ben Ishai P, Tripathi SR, Kawase K, Puzenko A, Feldman Y. What is the primary mover of water dynamics? Phys Chem Chem Phys 2015; 17:15428-34. [DOI: 10.1039/c5cp01871d] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We present evidence that the microscopic origin of both the excess wing and the main relaxation process of pure water is the same.
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Affiliation(s)
- P. Ben Ishai
- Department of Applied Physics
- The Hebrew University of Jerusalem
- Jerusalem 91904
- Israel
- Graduate School of Engineering
| | - S. R. Tripathi
- Graduate School of Engineering
- Nagoya University
- Nagoya 464-8603
- Japan
| | - K. Kawase
- Graduate School of Engineering
- Nagoya University
- Nagoya 464-8603
- Japan
| | - A. Puzenko
- Department of Applied Physics
- The Hebrew University of Jerusalem
- Jerusalem 91904
- Israel
| | - Yu. Feldman
- Department of Applied Physics
- The Hebrew University of Jerusalem
- Jerusalem 91904
- Israel
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29
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Samanta N, Das Mahanta D, Kumar Mitra R. Does Urea Alter the Collective Hydrogen-Bond Dynamics in Water? A Dielectric Relaxation Study in the Terahertz-Frequency Region. Chem Asian J 2014; 9:3457-63. [DOI: 10.1002/asia.201402696] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2014] [Revised: 07/30/2014] [Indexed: 11/09/2022]
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30
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Kang H, Jung S, Koh DY, Ahn YH, Park S, Park J, Lee H. Physicochemical properties of semi-clathrate hydrates as revealed by terahertz time-domain spectroscopy. Chem Phys Lett 2013. [DOI: 10.1016/j.cplett.2013.09.041] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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31
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Polley D, Patra A, Mitra RK. Dielectric relaxation of the extended hydration sheathe of DNA in the THz frequency region. Chem Phys Lett 2013. [DOI: 10.1016/j.cplett.2013.09.026] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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32
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33
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Matvejev V, Zizi M, Stiens J. Hydration Shell Parameters of Aqueous Alcohols: THz Excess Absorption and Packing Density. J Phys Chem B 2012; 116:14071-7. [DOI: 10.1021/jp305356d] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- V. Matvejev
- Laboratory of Micro- and Photonelectronics
LAMI-ETRO, Vrije Universiteit Brussel,
Pleinlaan 2, B-1050 Brussels, Belgium
| | - M. Zizi
- Department of Physiology FYSP, Vrije Universiteit Brussel, Laarbeeklaan 101B, B-1090
Brussels, Belgium
| | - J. Stiens
- Laboratory of Micro- and Photonelectronics
LAMI-ETRO, Vrije Universiteit Brussel,
Pleinlaan 2, B-1050 Brussels, Belgium
- Unit SSET,
Department HIM, Group
RFCDM, IMEC, Kapeldreef 75, B-3001 Leuven,
Belgium
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34
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Miura N, Yamada H, Moon A. Intermolecular vibrational study in liquid water and ice by using far infrared spectroscopy with synchrotron radiation of MIRRORCLE 20. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2010; 77:1048-1053. [PMID: 20869910 DOI: 10.1016/j.saa.2010.08.071] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2010] [Revised: 08/19/2010] [Accepted: 08/26/2010] [Indexed: 05/29/2023]
Abstract
Far infrared absorption measurements for distilled water and ice Ih were performed in the frequency range from 20 cm(-1) to 1000 cm(-1) with Fourier Transform Infrared Spectrometer (FTIR) utilizing SR of a portable synchrotron. Four vibrational bands were separated from measured spectra in liquid water. We found that a peak frequency of 40±1 cm(-1) did not depend on the temperature in a range between 10.0°C and 70.0°C; however, any low energy excitation modes were not observed in the ice spectrum. It is concluded that this band is caused by collective vibrations specific to the dynamical structure in liquid water.
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Affiliation(s)
- Nobuhiro Miura
- Synchrotron Light Life Science Center, Department of Photonics, FAculty of Science and Engineering, Ritsumeikan University, Noji-higashi 1-1-1, Kusatsu, Shiga 525-8577, Japan.
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35
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Leitner DM, Havenith M, Gruebele M. Biomolecule large-amplitude motion and solvation dynamics: modelling and probes from THz to X-rays. INT REV PHYS CHEM 2010. [DOI: 10.1080/01442350600862117] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- David M. Leitner
- a Department of Chemistry , University of Nevada , Reno , NV 89557 , USA
| | - Martina Havenith
- b Lehrstuhl für Physikalische Chemie II , Ruhr-Universität Bochum , 44780 Bochum , Germany
| | - Martin Gruebele
- c Departments of Chemistry and Physics , Center for Biophysics and Computational Biology , University of Illinois , Urbana , IL 61801 , USA
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36
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Kristensen TTL, Withayachumnankul W, Jepsen PU, Abbott D. Modeling terahertz heating effects on water. OPTICS EXPRESS 2010; 18:4727-39. [PMID: 20389486 DOI: 10.1364/oe.18.004727] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
We apply Kirchhoff's heat equation to model the influence of a CW terahertz beam on a sample of water, which is assumed to be static. We develop a generalized model, which easily can be applied to other liquids and solids by changing the material constants. If the terahertz light source is focused down to a spot with a diameter of 0.5 mm, we find that the steady-state temperature increase per milliwatt of transmitted power is 1.8?C/mW. A quantum cascade laser can produce a CW beam in the order of several milliwatts and this motivates the need to estimate the effect of beam power on the sample temperature. For THz time domain systems, we indicate how to use our model as a worst-case approximation based on the beam average power. It turns out that THz pulses created from photoconductive antennas give a negligible increase in temperature. As biotissue contains a high water content, this leads to a discussion of worst-case predictions for THz heating of the human body in order to motivate future detailed study. An open source Matlab implementation of our model is freely available for use at www.eleceng.adelaide.edu.au/thz.
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Affiliation(s)
- Torben T L Kristensen
- DTU Fotonik - Department of Photonics Engineering, Technical University of Denmark, DK-2800 Kongens Lyngby, Denmark
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37
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Mousavi P, Haran F, Jez D, Santosa F, Dodge JS. Simultaneous composition and thickness measurement of paper using terahertz time-domain spectroscopy. APPLIED OPTICS 2009; 48:6541-6546. [PMID: 19935977 DOI: 10.1364/ao.48.006541] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
We present a noncontact method for quantitative composition and thickness monitoring of flat sheet products using terahertz time-domain spectroscopy. We apply the method to obtain simultaneous measurement of thickness and moisture content of paper sheets. The paper is modeled as an effective medium of water mixed with fibers, and model parameters are estimated from fits to the measured transmission amplitude. We demonstrate the method on two different paper samples and obtain uncertainties that are comparable with existing sensor technology. Monte Carlo simulations indicate that these uncertainties can be reduced further by at least an order of magnitude.
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Affiliation(s)
- Payam Mousavi
- Department of Physics, Simon Fraser University, 8888 University Drive, Burnaby, British Columbia, V5A 1S6, Canada.
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38
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Larouche P, Max JJ, Chapados C. Isotope effects in liquid water by infrared spectroscopy. II. Factor analysis of the temperature effect on H2O and D2O. J Chem Phys 2008; 129:064503. [DOI: 10.1063/1.2960583] [Citation(s) in RCA: 28] [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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39
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Horn HW, Swope WC, Pitera JW. Characterization of the TIP4P-Ew water model: vapor pressure and boiling point. J Chem Phys 2007; 123:194504. [PMID: 16321097 DOI: 10.1063/1.2085031] [Citation(s) in RCA: 82] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
The liquid-vapor-phase equilibrium properties of the previously developed TIP4P-Ew water model have been studied using thermodynamic integration free-energy simulation techniques in the temperature range of 274-400 K. We stress that free-energy results from simulations need to be corrected in order to be compared to the experiment. This is due to the fact that the thermodynamic end states accessible through simulations correspond to fictitious substances (classical rigid liquids and classical rigid ideal gases) while experiments operate on real substances (liquids and real gases, with quantum effects). After applying analytical corrections the vapor pressure curve obtained from simulated free-energy changes is in excellent agreement with the experimental vapor pressure curve. The boiling point of TIP4P-Ew water under ambient pressure is found to be at 370.3+/-1.9 K, about 7 K higher than the boiling point of TIP4P water (363.7+/-5.1 K; from simulations that employ finite range treatment of electrostatic and Lennard-Jones interactions). This is in contrast to the approximately +15 K by which the temperature of the density maximum and the melting temperature of TIP4P-Ew are shifted relative to TIP4P, indicating that the temperature range over which the liquid phase of TIP4P-Ew is stable is narrower than that of TIP4P and resembles more that of real water. The quality of the vapor pressure results highlights the success of TIP4P-Ew in describing the energetic and entropic aspects of intermolecular interactions in liquid water.
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Affiliation(s)
- Hans W Horn
- International Business Machines Corporation (IBM) Almaden Research Center, 650 Harry Road, San Jose, CA 95120, USA.
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Hirsch O, Alexander P. Terahertz direct-contact refractometer/spectrometer. OPTICS LETTERS 2007; 32:2043-5. [PMID: 17632637 DOI: 10.1364/ol.32.002043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
A method for terahertz (THz) reflection spectroscopy is presented that utilizes direct contact between the backside of the pulsed emitter and the sample. Changes in the complex reflectivity of the emitter-sample interface are used to measure the spectrum. This method is especially useful for spectroscopy of liquid samples and soft materials. It simplifies the optical apparatus, has good sensitivity, and has capability for use in the construction of miniaturized THz probes. The problem of nonplanar wave fronts inside the emitter is discussed.
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Affiliation(s)
- Ole Hirsch
- Cavendish Laboratory, University of Cambridge, J.J Thomson Avenue, Cambridge CB3 0HE, UK.
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Henchman RH. Free energy of liquid water from a computer simulation via cell theory. J Chem Phys 2007; 126:064504. [PMID: 17313226 DOI: 10.1063/1.2434964] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
A method to calculate the free energy of water from computer simulation is presented. Based on cell theory, it approximates the potential energy surface sampled in the simulation by an anisotropic six-dimensional harmonic potential to model the three hindered translations and three hindered rotations of a single rigid water molecule. The potential is parametrized from the magnitude of the forces and torques measured in the simulation. The entropy of these six harmonic oscillators is calculated and summed with a conformational term to give the total entropy. Combining this with the simulation enthalpy yields the free energy. The six water models examined are TIP3P, SPC, TIP4P, SPC/E, TIP5P, and TIP4P-Ew. The results reproduce experiment well: free energies for all models are within 1.6 kJ mol(-1) and entropies are within 3.6 J K(-1) mol(-1). Approximately two-thirds of the entropy comes from translation, a third from rotation, and 5% from conformation. Vibrational frequencies match those in the experimental infrared spectrum and assist in their assignment. Intermolecular quantum effects are found to be small, with free energies for the classical oscillator lying 0.5-0.7 kJ mol(-1) higher than in the quantum case. Molecular displacements and vibrational and zero point energies are also calculated. Altogether, these results validate the harmonic oscillator as a quantitative model for the liquid state.
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Affiliation(s)
- Richard H Henchman
- Manchester Interdisciplinary Biocentre, The University of Manchester, 131 Princess Street, Manchester M1 7DN, UK.
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Dominguez-Vidal A, Kaun N, Ayora-Cañada MJ, Lendl B. Probing Intermolecular Interactions in Water/Ionic Liquid Mixtures by Far-infrared Spectroscopy. J Phys Chem B 2007; 111:4446-52. [PMID: 17408256 DOI: 10.1021/jp068777n] [Citation(s) in RCA: 133] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Far-infrared spectra in the range from 600 to 20 cm-1 of two hydrophilic (1-ethyl-3-methylimidazolium tetrafluoroborate and 1-butyl-3-methylimidazolium tetrafluoroborate) and one hydrophobic (1-butyl-3-methylimidazolium hexafluorophosphate) ionic liquids and their mixtures with water at different concentrations are reported. Shifts of the librational water bands depending on the nature of the anion are found to be related to the strength of the interaction between the water molecules and the anions. For both hydrophilic ionic liquids, the librational band is centered around 460 cm-1, whereas for the hydrophobic ionic liquid, it is shifted to 388 cm-1, indicating less hindered rotation of single water molecules. Multivariate curve resolution, paying special attention to the spectral range from 50 to 350 cm-1, was used to investigate the presence of different species with increasing water concentration. For both hydrophilic ionic liquids, a band located at 153 cm-1 was resolved into two different contributions. A small contribution at 202 cm-1 can be attributed to intermolecular interactions between water molecules forming dimers. The major contribution (centered at 148 cm-1) corresponds to water molecules that do not bond to each other via H-bonding. It is therefore assigned to a hindered translation arising from the stretching of the hydrogen bond between BF4- anions and water molecules. Formation of water dimers in the hydrophobic ionic liquid does not occur. Furthermore, the spectral contribution of the stretching of H-bonds between water molecules and PF6- cannot be unambiguously detected, which indicates an extremely weak interaction between water molecules and this anion.
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Affiliation(s)
- Ana Dominguez-Vidal
- Institute of Chemical Technologies and Analytics, Vienna University of Technology, Getreidemarkt 9/164AC, A-1060 Wien, Austria
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Gaiduk VI, Crothers DS. Nonharmonic transverse vibration of the H-bonded molecules and the THz spectra in ice and water. J Mol Liq 2006. [DOI: 10.1016/j.molliq.2006.01.003] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Lyashchenko AK, Novskova TA. Structural dynamics of water and its dielectric and absorption spectra in the range 0–800 cm−1. J Mol Liq 2006. [DOI: 10.1016/j.molliq.2005.11.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Brubach JB, Mermet A, Filabozzi A, Gerschel A, Roy P. Signatures of the hydrogen bonding in the infrared bands of water. J Chem Phys 2005; 122:184509. [PMID: 15918731 DOI: 10.1063/1.1894929] [Citation(s) in RCA: 241] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Infrared spectroscopy measurements have been completed over a wide range of frequencies allowing to measure the evolution of both intramolecular and intermolecular vibrational modes in water as a function of temperature. Emphasis is made on the high frequency OH stretching band and the so-called connectivity band that lies in the far infrared region. The substructures of the two infrared bands are analyzed in terms of different levels of connectivity of the water molecules, along the statements of the percolation model. Both band profiles appear to be related to the different degrees of connectivity of water molecules. Comparison of the data with the predictions of the percolation model shows good agreement as for the temperature evolution of liquid water. This work provides additional support to the interpretation of water bands substructures as signatures of its very specific connectivity pattern.
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Affiliation(s)
- J-B Brubach
- LURE, UMR CNRS, bâtiment 209 D, Université Paris-Sud, 91405 Orsay cedex, France
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