1
|
Liu Y, Liu X, Shu Y, Yu Y. Progress of the Impact of Terahertz Radiation on Ion Channel Kinetics in Neuronal Cells. Neurosci Bull 2024:10.1007/s12264-024-01277-0. [PMID: 39231899 DOI: 10.1007/s12264-024-01277-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2023] [Accepted: 04/12/2024] [Indexed: 09/06/2024] Open
Abstract
In neurons and myocytes, selective ion channels in the plasma membrane play a pivotal role in transducing chemical or sensory stimuli into electrical signals, underpinning neural and cardiac functionality. Recent advancements in biomedical research have increasingly spotlighted the interaction between ion channels and electromagnetic fields, especially terahertz (THz) radiation. This review synthesizes current findings on the impact of THz radiation, known for its deep penetration and non-ionizing properties, on ion channel kinetics and membrane fluid dynamics. It is organized into three parts: the biophysical effects of THz exposure on cells, the specific modulation of ion channels by THz radiation, and the potential pathophysiological consequences of THz exposure. Understanding the biophysical mechanisms underlying these effects could lead to new therapeutic strategies for diseases.
Collapse
Affiliation(s)
- Yanjiang Liu
- Research Institute of Intelligent and Complex Systems, Fudan University, Shanghai, 200433, China
| | - Xi Liu
- Research Institute of Intelligent and Complex Systems, Fudan University, Shanghai, 200433, China
- MOE Frontiers Center for Brain Science and State Key Laboratory of Medical Neurobiology, Fudan University, Shanghai, 200433, China
- Institute of Science and Technology for Brain-Inspired Intelligence, Fudan University, Shanghai, 200433, China
- Department of Neurology, Huashan Hospital, Fudan University, Shanghai, 20043, China
- Institute for Translational Brain Research, Fudan University, Shanghai, 200433, China
- Department of Neurosurgery, Jinshan Hospital of Fudan University, Shanghai, 201508, China
| | - Yousheng Shu
- Research Institute of Intelligent and Complex Systems, Fudan University, Shanghai, 200433, China.
- MOE Frontiers Center for Brain Science and State Key Laboratory of Medical Neurobiology, Fudan University, Shanghai, 200433, China.
- Department of Neurology, Huashan Hospital, Fudan University, Shanghai, 20043, China.
- Institute for Translational Brain Research, Fudan University, Shanghai, 200433, China.
| | - Yuguo Yu
- Research Institute of Intelligent and Complex Systems, Fudan University, Shanghai, 200433, China.
- MOE Frontiers Center for Brain Science and State Key Laboratory of Medical Neurobiology, Fudan University, Shanghai, 200433, China.
- Institute of Science and Technology for Brain-Inspired Intelligence, Fudan University, Shanghai, 200433, China.
- Shanghai Artificial Intelligence Laboratory, Shanghai, 200232, China.
| |
Collapse
|
2
|
Ma H, Chen X, Han Y, Zhang J, Wen K, Cheng S, Zhao Q, Wang Y, Wu J, Shao J. Ice-Enabled Transfer of Graphene on Copper Substrates Enhanced by Electric Field and Cu 2O. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024; 11:e2402319. [PMID: 38924683 PMCID: PMC11348137 DOI: 10.1002/advs.202402319] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2024] [Revised: 06/02/2024] [Indexed: 06/28/2024]
Abstract
Graphene films grown by the chemical vapor deposition (CVD) method suffer from contamination and damage during transfer. Herein, an innovative ice-enabled transfer method under an applied electric field and in the presence of Cu2O (or Cu2O-Electric-field Ice Transfer, abbreviated as CEIT) is developed. Ice serves as a pollution-free transfer medium while water molecules under the electric field fully wet the graphene surface for a bolstered adhesion force between the ice and graphene. Cu2O is used to reduce the adhesion force between graphene and copper. The combined methodology in CEIT ensures complete separation and clean transfer of graphene, resulting in successfully transferred graphene to various substrates, including polydimethylsiloxane (PDMS), Teflon, and C4F8 without pollution. The graphene obtained via CEIT is utilized to fabricate field-effect transistors with electrical performances comparable to that of intrinsic graphene characterized by small Dirac points and high carrier mobility. The carrier mobility of the transferred graphene reaches 9090 cm2 V-1 s-1, demonstrating a superior carrier mobility over that from other dry transfer methods. In a nutshell, the proposed clean and efficient transfer method holds great potential for future applications of graphene.
Collapse
Affiliation(s)
- Hechuan Ma
- Micro‐ and Nanotechnology Research CenterState Key Laboratory for Manufacturing Systems EngineeringXi'an Jiaotong UniversityXi'anShannxi710049China
| | - Xiaoming Chen
- Micro‐ and Nanotechnology Research CenterState Key Laboratory for Manufacturing Systems EngineeringXi'an Jiaotong UniversityXi'anShannxi710049China
- XJTU‐POLIMI Joint School of Design and InnovationXi'an Jiaotong UniversityXi'anShaanxi710049China
| | - Yufei Han
- Micro‐ and Nanotechnology Research CenterState Key Laboratory for Manufacturing Systems EngineeringXi'an Jiaotong UniversityXi'anShannxi710049China
| | - Jie Zhang
- Electronic Materials Research LabKey Laboratory of the Ministry of EducationXi'an Jiaotong UniversityXi'anShaanxi710049China
| | - Kaiqiang Wen
- Micro‐ and Nanotechnology Research CenterState Key Laboratory for Manufacturing Systems EngineeringXi'an Jiaotong UniversityXi'anShannxi710049China
| | - Siyi Cheng
- Micro‐ and Nanotechnology Research CenterState Key Laboratory for Manufacturing Systems EngineeringXi'an Jiaotong UniversityXi'anShannxi710049China
| | - Quanyi Zhao
- Micro‐ and Nanotechnology Research CenterState Key Laboratory for Manufacturing Systems EngineeringXi'an Jiaotong UniversityXi'anShannxi710049China
| | - Yijie Wang
- Micro‐ and Nanotechnology Research CenterState Key Laboratory for Manufacturing Systems EngineeringXi'an Jiaotong UniversityXi'anShannxi710049China
| | - Jianyang Wu
- Department of PhysicsJiujiang Research Institute and Research Institute for Biomimetics and Soft MatterFujian Provincial Key Laboratory for Soft Functional Materials ResearchXiamen UniversityXiamen361005China
| | - Jinyou Shao
- Micro‐ and Nanotechnology Research CenterState Key Laboratory for Manufacturing Systems EngineeringXi'an Jiaotong UniversityXi'anShannxi710049China
| |
Collapse
|
3
|
Liu L, Wang Z, Wang M, Zhao G. Quantitative Analysis of Ice Crystal Growth During Freezing of Dimethyl Sulfoxide Solutions Under Alternating Current Electric Fields. Biopreserv Biobank 2024; 22:383-394. [PMID: 38011517 DOI: 10.1089/bio.2023.0035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2023] Open
Abstract
During cryopreservation, the growth of ice crystals can cause mechanical damage to samples, which is one of the important factors limiting the quality of preserved samples. To enhance the preservation quality of biological samples, scholars have tried various engineering methods. Among them, an electric field is an essential factor affecting solution freezing. Dimethyl sulfoxide, as a commonly used cryoprotectant, can cause mechanical damage to cells due to ice crystals even when freezing at the optimal freezing rate. Water is a strongly polar dielectric material, and the applied alternating current (AC) electric field will affect the water freezing performance. Therefore, a quantitative study of ice crystal nucleation and growth during freezing of dimethyl sulfoxide solutions under different AC electric field conditions is needed to try to reduce ice crystal damage. We created a liquid-film device to approximate the ice crystal growth process as a two-dimensional image. The frequency of the AC voltage was set from 0 to 50 kHz. We measured the supercooling of the dimethyl sulfoxide solution under AC electric field conditions. As an objective and accurate quantitative analysis of the ice crystal growth process, we propose a Dilated Convolutional Segmentation Transformer for semantic segmentation of ice crystal images. It is concluded that the average area and the growth rate of single ice crystals decrease with increasing electric field frequency at a certain concentration of dimethyl sulfoxide solution. Lower concentrations of dimethyl sulfoxide solution in combination with an AC electric field can achieve similar ice suppression effects as when higher concentrations of dimethyl sulfoxide solution act alone. We believe that AC electric fields are expected to be an aid to cryopreservation and provide some theoretical basis and experimental foundation for its development.
Collapse
Affiliation(s)
- Liting Liu
- Department of Electronic Engineering and Information Science, University of Science and Technology of China, Hefei, China
| | - Zirui Wang
- Department of Electronic Engineering and Information Science, University of Science and Technology of China, Hefei, China
| | - Menghan Wang
- Department of Electronic Engineering and Information Science, University of Science and Technology of China, Hefei, China
| | - Gang Zhao
- Department of Electronic Engineering and Information Science, University of Science and Technology of China, Hefei, China
| |
Collapse
|
4
|
Zhang T, Han Y, Luo CF, Liu X, Zhang X, Song Y, Chen YT, Du S. Ferroelectricity of ice nanotube forests grown in three-dimensional graphene: the electric field effect. NANOSCALE 2024; 16:1188-1196. [PMID: 38113050 DOI: 10.1039/d3nr03762b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2023]
Abstract
Generating diverse ferroelectric ice nanotubes (NTs) efficiently has always been challenging, but matters in nanomaterial synthesis and processing technology. In the present work, we propose a method of growing ice NT forests in a single cooling process. A three-dimensional (3D) graphene structure was selected to behave as a representative container in which a batch of (5, 0) ice NTs was formed simultaneously under the cooling process from molecular dynamics simulation. Other similar 3D graphene structures but with different hole configurations, like uniform triangle or both triangle and pentagon, were also tested, revealing that ice NTs with different tube indices, i.e. both (3, 0) and (5, 0), could also be formed at the same time. Intriguingly, the orientations of the dipole moments of the water molecules of an ice NT formed were independent of each other, making the net ferroelectricity of the whole system weakened or even cancelled. An electric field could help change the orientation of the water molecules of the already obtained ice NTs and even twist the tube to be a spiral (5, 1) one if it was applied during the cooling process, such that the net ferroelectricity was greatly improved. The underlying physical mechanism of all phase transition phenomena, including the improvement of the ferroelectricity under an electric field, were explored in depth from the phase transition curves and structural point of view. The obtained results are of significant application value for improving the preparation efficiency of nano-ferroelectric materials, which are prosperous in nano-devices.
Collapse
Affiliation(s)
- Tengfei Zhang
- Qingdao Innovation and Development Center of Harbin Engineering University, 266400 Qingdao, China.
| | - Yang Han
- Qingdao Innovation and Development Center of Harbin Engineering University, 266400 Qingdao, China.
- College of Power and Energy Engineering, Harbin Engineering University, 150001 Harbin, China
| | - Chuan-Fu Luo
- College of State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 130022 Changchun, China
- School of Applied Chemistry and Engineering, University of Science and Technology of China, 230026 Hefei, China
| | - Xiaochuang Liu
- Qingdao Innovation and Development Center of Harbin Engineering University, 266400 Qingdao, China.
| | - Xiaowei Zhang
- Qingdao Innovation and Development Center of Harbin Engineering University, 266400 Qingdao, China.
| | - Yuhan Song
- Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, 210096 Nanjing, China
| | - Yi-Tung Chen
- Department of Mechanical Engineering, University of Nevada, Las Vegas, NV 89154, USA
| | - Shiyu Du
- Engineering Laboratory of Specialty Fibers and Nuclear Energy Materials, Ningbo Institute of Industrial Technology, Chinese Academy of Sciences, 315201 Ningbo, China
| |
Collapse
|
5
|
Wakolo SW, Tryk DA, Nishiyama H, Miyatake K, Iiyama A, Inukai J. Various states of water species in an anion exchange membrane characterized by Raman spectroscopy under controlled temperature and humidity. Phys Chem Chem Phys 2024; 26:1658-1670. [PMID: 38009441 DOI: 10.1039/d3cp03660j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2023]
Abstract
Anion exchange membrane fuel cells (AEMFCs) hold the key to future mass commercialisation of fuel cell technology, even though currently, AEMFCs perform less optimally than proton exchange membrane fuel cells (PEMFCs). Unlike PEMFCs, AEMFCs have demonstrated the capability to operate independently of Pt group metal-based catalysts. Water characterization inside the membrane is one factor that significantly influences the performance of AEMFCs. In this paper, different water species inside an anion exchange membrane (AEM), QPAF-4, developed at the University of Yamanashi, were studied for the first time using micro-Raman spectroscopy. Spectra of pure water, alkaline solutions, and calculations based on density functional theory were used to identify the water species in the AEM. The OH stretching band was deconvoluted into nine unique Gaussian bands. All the hydrogen-bonded OH species increased steadily with increasing humidity, while the CH and non-H-bonded OH remained relatively constant. These results confirm the viability of micro-Raman spectroscopy in studying the various water-related species in AEMs. The availability of this technique is an essential prerequisite in improving the ionic conductivity and effectively solving the persisting durability challenge facing AEMFCs, thus hastening the possibility of mass commercialisation of fuel cells.
Collapse
Affiliation(s)
- Solomon Wekesa Wakolo
- Integrated Graduate School of Medicine, Engineering, and Agricultural Sciences, University of Yamanashi, 4-3-37 Takeda, Kofu, Yamanashi 400-8510, Japan
| | - Donald A Tryk
- Hydrogen and Fuel Cell Nanomaterials Research Center, University of Yamanashi, 6-43 Miyamae, Kofu, Yamanashi 400-0021, Japan.
| | - Hiromichi Nishiyama
- Hydrogen and Fuel Cell Nanomaterials Research Center, University of Yamanashi, 6-43 Miyamae, Kofu, Yamanashi 400-0021, Japan.
| | - Kenji Miyatake
- Hydrogen and Fuel Cell Nanomaterials Research Center, University of Yamanashi, 6-43 Miyamae, Kofu, Yamanashi 400-0021, Japan.
- Clean Energy Research Center, University of Yamanashi, 4-3-11 Takeda, Kofu, Yamanashi 400-8510, Japan
- Department of Applied Chemistry, Waseda University, Tokyo 169-8555, Japan
| | - Akihiro Iiyama
- Hydrogen and Fuel Cell Nanomaterials Research Center, University of Yamanashi, 6-43 Miyamae, Kofu, Yamanashi 400-0021, Japan.
| | - Junji Inukai
- Hydrogen and Fuel Cell Nanomaterials Research Center, University of Yamanashi, 6-43 Miyamae, Kofu, Yamanashi 400-0021, Japan.
- Clean Energy Research Center, University of Yamanashi, 4-3-11 Takeda, Kofu, Yamanashi 400-8510, Japan
| |
Collapse
|
6
|
Ries A, Benítez JV, Samudio A, Armoa R, Nakayama HD. Germination of bean seeds ( Vigna unguiculata L. Walp.) in strong electric fields. MethodsX 2023; 11:102490. [PMID: 38098768 PMCID: PMC10719570 DOI: 10.1016/j.mex.2023.102490] [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: 06/20/2023] [Accepted: 11/15/2023] [Indexed: 12/17/2023] Open
Abstract
This paper presents a tutorial for the germination of bean seeds (Vigna unguiculata L. Walp.) in strong electrostatic fields up to 1240 V/cm. The seeds were allowed to germinate under different electric field strengths for 48 h. Although most of such germination experiments did not show any visible effect, the field strength of 945 V/cm strongly increased the seedling's vigor during the early growth stage. In the end, 30 % more yield was obtained from stimulated seeds when compared to the control group. This article postulates for the first time a hypothesis of the mechanism of action of the electric field during germination. In biological cells of any species, water confined between narrow surfaces can undergo a phase transition that shifts its melting point to higher temperatures when an external electric field is applied. This effect has already been known as electrofreezing, and has been confirmed by several experimental and molecular modeling studies. As a consequence, the transport kinetics of molecules across cell organelle membranes might be altered, which in turn leads to different plant properties. With emphasis on the presented method, this work reports: •An inexpensive electric circuit for the generation of strong electric fields•Instructions regarding the setup and operation of an adequate germination chamber.
Collapse
Affiliation(s)
- Andreas Ries
- Centro Multidisciplinario de Investigaciones Tecnológicas (CEMIT), Campus Universitario de la Universidad Nacional de Asunción, Dr. Gaspar Villamayor c/ Dr. Cecilio Baéz, San Lorenzo 111421, Paraguay
| | - Juan V. Benítez
- Centro Multidisciplinario de Investigaciones Tecnológicas (CEMIT), Campus Universitario de la Universidad Nacional de Asunción, Dr. Gaspar Villamayor c/ Dr. Cecilio Baéz, San Lorenzo 111421, Paraguay
| | - Antonio Samudio
- Centro Multidisciplinario de Investigaciones Tecnológicas (CEMIT), Campus Universitario de la Universidad Nacional de Asunción, Dr. Gaspar Villamayor c/ Dr. Cecilio Baéz, San Lorenzo 111421, Paraguay
| | - Raquel Armoa
- Centro Multidisciplinario de Investigaciones Tecnológicas (CEMIT), Campus Universitario de la Universidad Nacional de Asunción, Dr. Gaspar Villamayor c/ Dr. Cecilio Baéz, San Lorenzo 111421, Paraguay
| | - Héctor D. Nakayama
- Centro Multidisciplinario de Investigaciones Tecnológicas (CEMIT), Campus Universitario de la Universidad Nacional de Asunción, Dr. Gaspar Villamayor c/ Dr. Cecilio Baéz, San Lorenzo 111421, Paraguay
| |
Collapse
|
7
|
Farrokhbin M, Lohrasebi A. Modeling the influence of the external electric fields on water viscosity inside carbon nanotubes. THE EUROPEAN PHYSICAL JOURNAL. E, SOFT MATTER 2023; 46:93. [PMID: 37812291 DOI: 10.1140/epje/s10189-023-00357-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2023] [Accepted: 09/28/2023] [Indexed: 10/10/2023]
Abstract
Equilibrium molecular dynamics simulations were performed to explore the effects of external electric fields and confinement on water properties inside various carbon nanotubes (CNTs). Using different GHz electric field frequencies as well as various constant electric field strengths, the radial distribution function and density profile were investigated, by which the impact of the electric fields and confinement on the water structure are revealed. The results indicated water molecules inside the CNT form layered structures due to topological confinement applying external electric fields can disturb this ordered water molecules structure and increase the viscosity of confined water, particularly in the case of CNTs with a radius less than 13.5 Å. Conversely, for CNTs with a radius greater than13.5 Å, the viscosity decreases under the influence of external oscillating or constant electric fields. How dose the synergism of confinement and external electric fields affect the water properties inside the CNTs?
Collapse
Affiliation(s)
| | - Amir Lohrasebi
- Department of Physics, University of Isfahan, Isfahan, 8174673441, Iran.
| |
Collapse
|
8
|
Fuhrman Javitt L, Kalita S, Dubey KD, Ehre D, Shaik S, Lahav M, Lubomirsky I. Electro-Freezing of Supercooled Water Is Induced by Hydrated Al 3+ and Mg 2+ Ions: Experimental and Theoretical Studies. J Am Chem Soc 2023; 145:18904-18911. [PMID: 37602827 PMCID: PMC10472506 DOI: 10.1021/jacs.3c05004] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2023] [Indexed: 08/22/2023]
Abstract
This work reports that the octahedral hydrated Al3+ and Mg2+ ions operate within electrolytic cells as kosmotropic (long-range order-making) "ice makers" of supercooled water (SCW). 10-5 M solutions of hydrated Al3+ and Mg2+ ions each trigger, near the cathode (-20 ± 5 V), electro-freezing of SCW at -4 °C. The hydrated Al3+ ions do so with 100% efficiency, whereas the Mg2+ ions induce icing with 40% efficiency. In contrast, hydrated Na+ ions, under the same experimental conditions, do not induce icing differently than pure water. As such, our study shows that the role played by Al3+ and Mg2+ ions in water electro-freezing is impacted by two synchronous effects: (1) a geometric effect due to the octahedral packing of the coordinated water molecules around the metallic ions, and (2) the degree of polarization which these two ions induce and thereby acidify the coordinated water molecules, which in turn imparts them with an ice-like structure. Long-duration molecular dynamics (MD) simulations of the Al3+ and Mg2+ indeed reveal the formation of "ice-like" hexagons in the vicinity of these ions. Furthermore, the MD shows that these hexagons and the electric fields of the coordinate water molecules give rise to ultimate icing. As such, the MD simulations provide a rational explanation for the order-making properties of these ions during electro-freezing.
Collapse
Affiliation(s)
- Leah Fuhrman Javitt
- Department
of Molecular Chemistry and Materials Science, Weizmann Institute of Science, Rehovot 7610001, Israel
| | - Surajit Kalita
- Institute
of Chemistry, The Hebrew University of Jerusalem, Edmond J. Safra Campus, Givat Ram, Jerusalem 9190401, Israel
| | - Kshatresh Dutta Dubey
- Department
of Chemistry, School of Natural Sciences, Shiv Nadar Institution of Eminence, Greater Noida, Uttar Pradesh 201314, India
| | - David Ehre
- Department
of Molecular Chemistry and Materials Science, Weizmann Institute of Science, Rehovot 7610001, Israel
| | - Sason Shaik
- Institute
of Chemistry, The Hebrew University of Jerusalem, Edmond J. Safra Campus, Givat Ram, Jerusalem 9190401, Israel
| | - Meir Lahav
- Department
of Molecular Chemistry and Materials Science, Weizmann Institute of Science, Rehovot 7610001, Israel
| | - Igor Lubomirsky
- Department
of Molecular Chemistry and Materials Science, Weizmann Institute of Science, Rehovot 7610001, Israel
| |
Collapse
|
9
|
Pial TH, Das S. Machine learning enabled quantification of the hydrogen bonds inside the polyelectrolyte brush layer probed using all-atom molecular dynamics simulations. SOFT MATTER 2022; 18:8945-8951. [PMID: 36421980 DOI: 10.1039/d2sm00997h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
The configuration of densely grafted charged polyelectrolyte (PE) brushes is strongly dictated by the properties and behavior of the counterions that screen the PE brush charges and the solvent molecules (typically water) that solvate the brush molecules and these screening counterions. Only recently, efforts have been made to study the PE brushes atomistically, thereby shedding light on the properties of brush-supported ions and water molecules. However, even for such efforts, there are limitations associated with using a generic definition to estimate certain properties of water and ions inside the brush layer. For example, water-water hydrogen bonds (HBs) will behave differently for locations outside and inside the brush layer, given the fact that the densely closely grafted PE brush molecules create a soft nanoconfinement where the water connectivity becomes highly disrupted: therefore, using the same definition to quantify the HBs inside and outside the brush layer will be unwise. In this paper, we address this limitation by employing an unsupervised machine learning (ML) approach to predict the water-water hydrogen bonding inside a cationic PE brush layer modeled using all-atom molecular dynamics (MD) simulations. The ML method, which relies on a clustering approach and uses the equilibrium coordinates of the water molecules (obtained from the all-atom MD simulations) as the input, is capable of identifying the structural modification of water-water HBs (revealed through appropriate clustering of the data) inside the PE brush layer induced soft nanoconfinement. Such capabilities would not have been possible by using a generic definition of the HBs. Our calculations lead to four key findings: (1) the clusters formed inside and outside the brush layer are structurally similar; (2) the margin of the cluster is shorter inside the PE brush layer confirming the possible disruption of the HBs inside the PE brush layer; (3) the average "hydrogen-acceptor-oxygen-donor-oxygen" angle that defines the HB is reduced for the HBs formed inside the brush layer; (4) the use of the generic definition (definition usable for characterizing the HBs in brush-free bulk) leads to an overprediction of the number of HBs formed inside the PE brush layer.
Collapse
Affiliation(s)
- Turash Haque Pial
- Department of Mechanical Engineering, University of Maryland, College Park, MD, 20742, USA.
| | - Siddhartha Das
- Department of Mechanical Engineering, University of Maryland, College Park, MD, 20742, USA.
| |
Collapse
|
10
|
Electric field direction-induced gas/water selectively entering nanochannel. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.119852] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|
11
|
Alosious S, Kannam SK, Sathian SP, Todd BD. Effects of Electrostatic Interactions on Kapitza Resistance in Hexagonal Boron Nitride-Water Interfaces. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:8783-8793. [PMID: 35830549 DOI: 10.1021/acs.langmuir.2c00637] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Electrostatic interactions in nanoscale systems can influence the heat transfer mechanism and interfacial properties. This study uses molecular dynamics simulations to investigate the impact of various electrostatic interactions on the Kapitza resistance (Rk) on a hexagonal boron nitride-water system. The Kapitza resistance at hexagonal boron nitride nanotube (hBNNT)-water interface reduces with an increase in diameter of the nanotube due to more aggregation of water molecules per unit surface area. An increase in the partial charges on boron and nitride caused the reduction in Rk. With the increase in partial charge, a better hydrogen bonding between hBNNT and water was observed, whereas the structure and order of the water molecules remain the same. Nevertheless, the addition of NaCl salt into water does not have any influence on interfacial thermal transport. Rk remains unchanged with electrolyte concentration because the cumulative Coulombic interaction between the ions and the hBNNT is significantly less when compared with water molecules. Furthermore, the effect of electric field strength on interfacial heat transfer is also investigated by providing uniform positive and negative surface charges on the outermost hBN layers. Rk is nearly independent of the practical range of applied electric fields and decreases with an increasing electric field for extreme field strengths until the electrofreezing phenomenon occurs. The ordering of water molecules toward the charged surface leads to an increase in the layering effect, causing the reduction in Rk in the presence of an electric field.
Collapse
Affiliation(s)
- Sobin Alosious
- Department of Applied Mechanics, Indian Institute of Technology Madras, Chennai 600036, India
- Department of Mathematics, School of Science, Computing and Engineering Technologies, Swinburne University of Technology, Melbourne, Victoria 3122, Australia
| | - Sridhar Kumar Kannam
- Department of Mathematics, School of Science, Computing and Engineering Technologies, Swinburne University of Technology, Melbourne, Victoria 3122, Australia
| | - Sarith P Sathian
- Department of Applied Mechanics, Indian Institute of Technology Madras, Chennai 600036, India
| | - B D Todd
- Department of Mathematics, School of Science, Computing and Engineering Technologies, Swinburne University of Technology, Melbourne, Victoria 3122, Australia
| |
Collapse
|
12
|
Gao Y, Yin M, Zhang H, Xu B. Electrically Suppressed Outflow of Confined Liquid in Hydrophobic Nanopores. ACS NANO 2022; 16:9420-9427. [PMID: 35658431 DOI: 10.1021/acsnano.2c02240] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Confining liquid in a hydrophobic nanoenvironment has enabled a broad spectrum of applications in biomedical sensors, mechanical actuators, and energy storage and converters, where the outflow of confined liquid is spontaneous and fast due to the intrinsic hydrophobic nature of nanopores with extremely low interfacial friction, challenging design capacity and control tolerance of structures and devices. Here, we present a facile approach of suppressing the outflow of water confined in hydrophobic nanopores with an electric field. Extensive molecular dynamics simulations show that the presence of an electric field could significantly strengthen hydrogen bonds and retard degradations of the associated networks during the outflow. The outflow deformation and strength are extracted to quantitatively characterize the electrical suppression to outflow and agree well with simulations. This study proposes a practical means of impeding the fast liquid outflow in hydrophobic nanopores, potentially useful for devising nanofluidics-based functional structures and devices with controllable performance.
Collapse
Affiliation(s)
- Yuan Gao
- Department of Mechanical and Aerospace Engineering, University of Virginia, Charlottesville, Virginia 22904, United States
| | - Mengtian Yin
- Department of Mechanical and Aerospace Engineering, University of Virginia, Charlottesville, Virginia 22904, United States
| | - Haozhe Zhang
- Department of Mechanical and Aerospace Engineering, University of Virginia, Charlottesville, Virginia 22904, United States
| | - Baoxing Xu
- Department of Mechanical and Aerospace Engineering, University of Virginia, Charlottesville, Virginia 22904, United States
| |
Collapse
|
13
|
Yamazoe K, Higaki Y, Inutsuka Y, Miyawaki J, Takahara A, Harada Y. Critical In-Plane Density of Polyelectrolyte Brush for the Ordered Hydrogen-Bonded Structure of Incorporated Water. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:3076-3081. [PMID: 35230121 DOI: 10.1021/acs.langmuir.1c02895] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
A polymer electrolyte brush is a reasonable platform to confine water molecules within a nanoscopic area to study their role in the function of interacting media because of their adjustable nanospace and charge by changing the in-plane density and side chains of the brush. Here, we demonstrate how the in-plane spacing of cationic polymer brush chains, poly[2-(methacryloyloxy)ethyltrimethylammonium chloride] (PMTAC), affects the hydrogen bond configuration of incorporated water using soft X-ray emission spectroscopy. At the critical in-plane density σ = 0.30 chains/nm2 of PMTAC, tetrahedrally coordinated water molecules started to melt into distorted or broken hydrogen-bonded configurations. Considering the charge on the quaternary ammonium cations, the electric field required to form a tetrahedrally coordinated hydrogen-bonded configuration was estimated as ∼500 kV cm-1 and is effective up to ∼1 nm from the surface of the polymer chain. These findings are useful for designing specific interface properties and the resultant surface function of polyelectrolyte-based materials.
Collapse
Affiliation(s)
- Kosuke Yamazoe
- Institute for Solid State Physics, The University of Tokyo, Kashiwa, Chiba 277-8581, Japan
| | - Yuji Higaki
- Graduate School of Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
- Institute for Materials Chemistry and Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Yoshihiro Inutsuka
- Graduate School of Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Jun Miyawaki
- Institute for Solid State Physics, The University of Tokyo, Kashiwa, Chiba 277-8581, Japan
- Synchrotron Radiation Research Organization, The University of Tokyo, 1-1-1, Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5148, Japan
| | - Atsushi Takahara
- Graduate School of Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
- Institute for Materials Chemistry and Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Yoshihisa Harada
- Institute for Solid State Physics, The University of Tokyo, Kashiwa, Chiba 277-8581, Japan
- Synchrotron Radiation Research Organization, The University of Tokyo, 1-1-1, Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5148, Japan
| |
Collapse
|
14
|
Bhattacharjee S, Khan S. Molecular insights into the electrowetting behavior of aqueous ionic liquids. Phys Chem Chem Phys 2022; 24:1803-1813. [PMID: 34985472 DOI: 10.1039/d1cp01821c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Molecular dynamics (MD) simulations were applied to investigate the wettability of aqueous hydrophilic and hydrophobic imidazolium-based ionic liquid (IL) nano-droplets on a graphite surface under a perpendicular electric field. Imminent transformation in the droplet configuration was observed at E = 0.08 V Å-1 both for hydrophobic ILs 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide [EMIM][NTF2] and SPC/E water droplets. However, for the hydrophilic IL, 1-ethyl-3-methylimidazolium tetrafluoroborate [EMIM][BF4], the droplet was entirely elongated to column-shaped at E = 0.09 V Å-1 for lower weight percentages of ILs and at E = 0.15 V Å-1 for a higher weight percentage of ILs (i.e., 50 wt%). We explored the impact of the electric field through various parameters such as mass and charge density distribution across the droplet, contact angle of the droplet, orientation of water dipoles, and hydrogen bond analysis. The external electric field was found to influence the orientation of water dipoles and the accumulation of charge at various interfaces was observed with an increase in an electric field, which finally leads to shape deformation and depletion of ions from the liquid-vapor interface of the droplet. However, this behavior strongly depends on the hydrophilicity or hydrophobicity of the ILs and thus, is critically examined for both the ILs.
Collapse
Affiliation(s)
- Sanchari Bhattacharjee
- Department of Chemical & Biochemical Engineering, Indian Institute of Technology Patna, Patna, 801103, India.
| | - Sandip Khan
- Department of Chemical & Biochemical Engineering, Indian Institute of Technology Patna, Patna, 801103, India.
| |
Collapse
|
15
|
Löwe JM, Hinrichsen V, Schremb M, Tropea C. Ice nucleation forced by transient electric fields. Phys Rev E 2021; 104:064801. [PMID: 35030904 DOI: 10.1103/physreve.104.064801] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2021] [Accepted: 11/16/2021] [Indexed: 11/07/2022]
Abstract
Icing affects many technical systems, like aircraft or high-voltage power transmission and distribution in cold regions. Ice accretion is often initiated by ice nucleation in sessile supercooled water droplets and is influenced by several influencing factors, of which the impact of electric fields on ice nucleation is still not completely understood. Especially the influence of transient electric fields is rarely or not at all investigated, even though it is of great interest, e.g., for high-voltage transmission lines or for the food industry. In the present study the impact of transient electric fields on ice nucleation in supercooled sessile water droplets is experimentally investigated under well-defined conditions. A set of droplets is cooled down to a certain temperature and is subsequently exposed to electric fields generated from standard lightning or standard switching impulse voltages, which are commonly used for testing of high-voltage equipment. The nucleation behavior of individual droplets is captured using a high-speed camera and the effect of the transient electric field on ice nucleation is analyzed by considering both the singular and the stochastic nature of nucleation. While the singular nature of nucleation is referred to during analysis of the relative number of droplets remaining liquid long times after the impulse voltage, its stochastic nature is accounted for in the analysis of the temporal evolution of the relative number of frozen droplets. It is shown that low electric field strengths (E[over ̂]≤6.52kV/cm) only have a negligible impact on ice nucleation, independent of the supercooling. In contrast, high electric field strengths (E[over ̂]≥9.78kV/cm) promote significantly ice nucleation. It is also shown that depending on the supercooling, the freezing delay of the different droplets in the ensemble may vary over several magnitudes for the same conditions. It is demonstrated that the electric field appears to indirectly affect the nucleation rate by generating droplet oscillations, finally promoting ice nucleation. The experiments clearly demonstrate the possibility to actively force ice nucleation by applying transient electric fields. These results improve the understanding of ice accretion on high-voltage insulators and may also lend insight into freezing processes in food industry. We expect that these results will be a valuable contribution in formulating and/or validating new nucleation models.
Collapse
Affiliation(s)
- Jens-Michael Löwe
- High-Voltage Laboratories, Technical University of Darmstadt, Darmstadt, 64283, Germany
| | - Volker Hinrichsen
- High-Voltage Laboratories, Technical University of Darmstadt, Darmstadt, 64283, Germany
| | - Markus Schremb
- Institute of Fluid Mechanics and Aerodynamics, Technical University of Darmstadt, Darmstadt, 64283, Germany
| | - Cameron Tropea
- Institute of Fluid Mechanics and Aerodynamics, Technical University of Darmstadt, Darmstadt, 64283, Germany
| |
Collapse
|
16
|
Majumdar J, Moid M, Dasgupta C, Maiti PK. Dielectric Profile and Electromelting of a Monolayer of Water Confined in Graphene Slit Pore. J Phys Chem B 2021; 125:6670-6680. [PMID: 34107687 DOI: 10.1021/acs.jpcb.1c02266] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A monolayer of water confined between two parallel graphene sheets exists in many different phases and exhibits fascinating dielectric properties that have been studied in experiments. In this work, we use molecular dynamics simulations to study how the dielectric properties of a confined monolayer of water is affected by its structure. We consider six of the popular nonpolarizable water models-SPC/E, SPC/Fw, TIP3P, TIP3P_M (modified), TIP4P-2005, and TIP4P-2005f-and find that the in-plane structure of the water molecules at ambient temperature and pressure is strongly dependent on the water model: all the 3-point water models considered here show square ice formation, whereas no such structural ordering is observed for the 4-point water models. This allows us to investigate the role of the in-plane structure of the water monolayer on its dielectric profile. Our simulations show an anomalous perpendicular dielectric constant compared to the bulk, and the models that do not exhibit ice formation show very different dielectric response along the channel width compared to models that exhibit square ice formation. We also demonstrate the occurrence of electromelting of the in-plane ordered water under the application of a perpendicular electric field and find that the critical field for electromelting strongly depends on the water model. Together, we have shown the dependence of confined water properties on the different water structures that it may take when sandwiched between bilayer graphene. These remarkable properties of confined water can be exploited in various nanofluidic devices, artificial ion channels, and molecular sieving.
Collapse
Affiliation(s)
- Jeet Majumdar
- Centre for Condensed Matter Theory, Department of Physics, Indian Institute of Science, Bangalore 560012, India
| | - Mohd Moid
- Centre for Condensed Matter Theory, Department of Physics, Indian Institute of Science, Bangalore 560012, India
| | - Chandan Dasgupta
- Centre for Condensed Matter Theory, Department of Physics, Indian Institute of Science, Bangalore 560012, India.,International Centre for Theoretical Sciences, Bangalore 560089, India
| | - Prabal K Maiti
- Centre for Condensed Matter Theory, Department of Physics, Indian Institute of Science, Bangalore 560012, India
| |
Collapse
|
17
|
Abbaspour M, Akbarzadeh H, Salemi S, Bahmanipour L. Structure, dynamics, and morphology of nanostructured water confined between parallel graphene surfaces and in carbon nanotubes by applying magnetic and electric fields. SOFT MATTER 2021; 17:3085-3095. [PMID: 33596282 DOI: 10.1039/d0sm01677b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Water molecules experience certain changes in their properties when they feel an external magnetic or electric field. These changes are significant in different applications, such as biological and biotechnological processes, nano-pumping, and water treatment. In this work, we have performed molecular dynamics (MD) simulations to investigate the different thermodynamics, structure, and dynamics of water molecules confined between two parallel surfaces and also confined in carbon nanotubes (CNTs). We have also applied different electric and magnetic fields in different directions to the confined molecules. In the graphene system, no polygonal shape was formed in either low or high electric fields, whereas rhombic and pentagonal shapes were formed in low and high magnetic fields. In the CNT system, applying electric fields in all three dimensions made the pentagonal shape disappear and the confined water molecules formed a ring shape when the electric field was applied in the axial direction. Applying the electric field perpendicular to the graphene surfaces increases the self-diffusion of the confined molecules, whereas applying the electric and magnetic fields along the CNT axis decreases the self-diffusion of the confined water molecules. In the graphene system, applying the electric field perpendicular to the graphene surfaces decreases the average number of hydrogen bonds (〈HB〉) whereas the magnetic field has little effect on the 〈HB〉. In the CNT system, applying Ex also leads to a smaller number of HBs. Also, applying the magnetic field along the x-direction (along the CNT direction) leads to a greater number of HBs than the other fields.
Collapse
Affiliation(s)
- Mohsen Abbaspour
- Department of Chemistry, Hakim Sabzevari University, Sabzevar, Iran.
| | | | | | | |
Collapse
|
18
|
Curland S, Javitt L, Weissbuch I, Ehre D, Lahav M, Lubomirsky I. Heterogeneous Electrofreezing Triggered by CO 2 on Pyroelectric Crystals: Qualitatively Different Icing on Hydrophilic and Hydrophobic Surfaces. Angew Chem Int Ed Engl 2020; 59:15570-15574. [PMID: 32621797 DOI: 10.1002/anie.202006433] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Indexed: 11/06/2022]
Abstract
By performing icing experiments on hydrophilic and hydrophobic surfaces of pyroelectric amino acids and on the x-cut faces of LiTaO3 , we discovered that the effect of electrofreezing of super cooled water is triggered by ions of carbonic acid. During the cooling of the hydrophilic pyroelectric crystals, a continuous water layer is created between the charged hemihedral faces, as confirmed by impedance measurements. As a result, a current of carbonic acid ions, produced by dissolved environmental CO2 , flows through the wetted layer towards the hemihedral faces and elevates the icing temperature. This proposed mechanism is based on the following: (i) on hydrophilic surfaces, water with dissolved CO2 (pH 4) freezes at higher temperatures than pure water of pH 7. (ii) In the absence of the ionic current, achieved by linking the two hemihedral faces of hydrophilic crystals by a conductive paint, water of the two pH levels freeze at the same temperature. (iii) On hydrophobic crystals with similar pyroelectric coefficients, where there is no continuous wetted layer, no electrofreezing effect is observed.
Collapse
Affiliation(s)
- Sofia Curland
- Department of Materials and Interfaces, The Weizmann Institute of Science, 76100-, Rehovot, Israel
| | - Leah Javitt
- Department of Materials and Interfaces, The Weizmann Institute of Science, 76100-, Rehovot, Israel
| | - Isabelle Weissbuch
- Department of Materials and Interfaces, The Weizmann Institute of Science, 76100-, Rehovot, Israel
| | - David Ehre
- Department of Materials and Interfaces, The Weizmann Institute of Science, 76100-, Rehovot, Israel
| | - Meir Lahav
- Department of Materials and Interfaces, The Weizmann Institute of Science, 76100-, Rehovot, Israel
| | - Igor Lubomirsky
- Department of Materials and Interfaces, The Weizmann Institute of Science, 76100-, Rehovot, Israel
| |
Collapse
|
19
|
Ghaani MR, English NJ. Kinetic study on electro-nucleation of water in a heterogeneous propane nano-bubble system to form polycrystalline ice I c. J Chem Phys 2020; 153:084501. [PMID: 32872892 DOI: 10.1063/5.0017929] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
Elucidating the underlying mechanisms of water solidification in heterogeneous systems is crucially important for a panoply of applications; gaining such an understanding has also proven to be very challenging to the community. Indeed, one such example lies in clarifying the thermodynamics and kinetics of electro-crystallization in heterogeneous systems, such as micro- and nano-bubble systems. Here, we employ non-equilibrium molecular dynamics of water in heterogeneous environments experiencing direct contact with a propane gas phase at various temperatures in externally applied static electric fields, elucidating significant external-field effects in inducing poly-crystalline cubic-ice formation. This is in stark contrast with recent work on homogeneous cubic-ice electro-nucleation to produce largely fault-free single crystals. We explore the kinetics of heterogeneous cubic-ice electro-nucleation under different field intensities and thermal conditions and provide an overview of time-dependent dynamics of evolution of polycrystallinity.
Collapse
Affiliation(s)
- Mohammad Reza Ghaani
- School of Chemical and Bioprocess Engineering, University College Dublin, Belfield, Dublin 4, Ireland
| | - Niall J English
- School of Chemical and Bioprocess Engineering, University College Dublin, Belfield, Dublin 4, Ireland
| |
Collapse
|
20
|
Curland S, Javitt L, Weissbuch I, Ehre D, Lahav M, Lubomirsky I. Heterogeneous Electrofreezing Triggered by CO
2
on Pyroelectric Crystals: Qualitatively Different Icing on Hydrophilic and Hydrophobic Surfaces. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202006433] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Sofia Curland
- Department of Materials and Interfaces The Weizmann Institute of Science 76100- Rehovot Israel
| | - Leah Javitt
- Department of Materials and Interfaces The Weizmann Institute of Science 76100- Rehovot Israel
| | - Isabelle Weissbuch
- Department of Materials and Interfaces The Weizmann Institute of Science 76100- Rehovot Israel
| | - David Ehre
- Department of Materials and Interfaces The Weizmann Institute of Science 76100- Rehovot Israel
| | - Meir Lahav
- Department of Materials and Interfaces The Weizmann Institute of Science 76100- Rehovot Israel
| | - Igor Lubomirsky
- Department of Materials and Interfaces The Weizmann Institute of Science 76100- Rehovot Israel
| |
Collapse
|
21
|
Li J, Lu H, Zhou X. Electric field triggered release of gas from a quasi-one-dimensional hydrate in the carbon nanotube. NANOSCALE 2020; 12:12801-12808. [PMID: 32432277 DOI: 10.1039/d0nr01113d] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
We systematically investigate the effects of an axial electric field on the formation and decomposition of quasi-one-dimensional nitrogen gas hydrates within a single-walled carbon nanotube (SWNT) by using molecular dynamics (MD) simulations. We find that the nitrogen hydrate in the SWNT undergoes a series of structure phase transitions with increasing electric field. Corresponding to the structure transition, the nitrogen gas releases from the carbon nanotube in the electric field range of 1 V nm-1 to 2 V nm-1. However, nitrogen molecules are trapped as guest molecules, forming a molecule wire, in the ice nanotube when the electric field is less than 1 V nm-1 or larger than 2 V nm-1. Our simulations indicate that the nanotube is an excellent tiny gas tank that can be used to trap gas molecules and control their release triggered sensitively by electric signals. The key to this phenomenon is the change in orientations of water dipoles induced by the electric field, which leads to the structural change in the hydrogen-bonding network and the change in the diffusion coefficient of the water molecules. Our findings here may help understanding the mechanism of the electrorelease of gas from hydrates confined in the nanoscale space.
Collapse
Affiliation(s)
- Jiaxian Li
- College of Physics and Electronic Information Engineering, Zhejiang Normal University, Jinhua 321004, China.
| | | | | |
Collapse
|
22
|
Li C, Lin D, Zhao W. Electric Field Induced Dewetting of Hydrophobic Nanocavities at Ambient Temperature. NANOMATERIALS (BASEL, SWITZERLAND) 2020; 10:E736. [PMID: 32290614 PMCID: PMC7221969 DOI: 10.3390/nano10040736] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/09/2020] [Revised: 04/09/2020] [Accepted: 04/09/2020] [Indexed: 11/26/2022]
Abstract
The understanding of water dewetting in nanoporous materials is of great importance in various fields of science and technology. Herein, we report molecular dynamics simulation results of dewetting of water droplet in hydrophobic nanocavities between graphene walls under the influence of electric field. At ambient temperature, the rate of dewetting induced by electric field is significantly large. Whereas, it is a very low rate of dewetting induced by high temperature (423 K) due to the strong interaction of the hydrogen-bonding networks of water droplets in nanocavities. In addition, the electric filed induced formation of a water column has been found in a vacuum chamber. When the electric field is turned off, the water column will transform into a water droplet. Importantly, the results demonstrate that the rate of electric field-induced dewetting increases with growth of the electric field. Overall, our results suggest that electric field may have a great potential application for nanomaterial dewetting.
Collapse
Affiliation(s)
| | - Dongdong Lin
- School of Physical Science and Technology, Ningbo University, Ningbo 315211, China;
| | - Wenhui Zhao
- School of Physical Science and Technology, Ningbo University, Ningbo 315211, China;
| |
Collapse
|
23
|
Xiang Z, Tang C, Chang C, Liu G. A primary model of THz and far-infrared signal generation and conduction in neuron systems based on the hypothesis of the ordered phase of water molecules on the neuron surface I: signal characteristics. Sci Bull (Beijing) 2020; 65:308-317. [PMID: 36659096 DOI: 10.1016/j.scib.2019.12.004] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2019] [Revised: 09/25/2019] [Accepted: 11/08/2019] [Indexed: 01/21/2023]
Abstract
In this paper, we use the theory of quantum optics and electrodynamics to study the electromagnetic field problem in the nervous system based on the assumption of an ordered arrangement of water molecules on the neuronal surface. Using the Lagrangian of the water molecule-field ion, the dynamic equations for neural signal generation and transmission are derived. Perturbation theory and the numerical method are used to solve the dynamic equations, and the characteristics of high-frequency signals (the dispersion relation, the time domain of the field, the frequency domain waveform, etc.) are discussed. This model predicts some intrinsic vibration modes of electromagnetic radiation on the neuronal surface. The frequency range of these vibration modes is in the THz and far-infrared ranges.
Collapse
Affiliation(s)
- Zuoxian Xiang
- Department of Engineering Physics, Tsinghua University, Beijing 100084, China; Innovation Laboratory of Terahertz Biophysics, National Innovation Institute of Defense Technology, Beijing 100071, China
| | - Chuanxiang Tang
- Department of Engineering Physics, Tsinghua University, Beijing 100084, China
| | - Chao Chang
- Innovation Laboratory of Terahertz Biophysics, National Innovation Institute of Defense Technology, Beijing 100071, China.
| | - Guozhi Liu
- Department of Engineering Physics, Tsinghua University, Beijing 100084, China.
| |
Collapse
|
24
|
A Constant Potential Molecular Dynamics Simulation Study of the Atomic‐Scale Structure of Water Surfaces Near Electrodes. CHINESE J CHEM 2019. [DOI: 10.1002/cjoc.201900270] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
25
|
Li S, Schmidt B. Replica exchange MD simulations of two-dimensional water in graphene nanocapillaries: rhombic versus square structures, proton ordering, and phase transitions. Phys Chem Chem Phys 2019; 21:17640-17654. [PMID: 31364628 DOI: 10.1039/c9cp00849g] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The hydrogen bond patterns, proton ordering, and phase transitions of monolayer ice in two-dimensional hydrophobic confinement are fundamentally different from those found for bulk ice. To investigate the behavior of quasi-2D ice, we perform molecular dynamics simulations of water confined between fixed graphene plates at a distance of 0.65 nm. While experimental results are still limited and theoretical investigations are often based on a single, often empirically based force field model, this work presents a systematic study modeling the water-graphene interaction by effective Lennard-Jones potentials previously derived from high-level ab initio CCSD(T) calculations of water adsorbed on graphene [Phys. Chem. Chem. Phys., 2013, 15, 4995]. For the water-water interaction different water force fields, i.e. SPCE, TIP3P, TIP4P, TIP4P/ICE, and TIP5P, are used. The water occupancy of the graphene capillary at a pressure of 1000 MPa is determined to be between 13.5 and 13.9 water molecules per square nanometer, depending on the choice of the water force field. Based on these densities, we explore the structure and dynamics of quasi-2D water for temperatures ranging from 200 K to about 600 K for each of the five force fields. To ensure complete sampling of the configurational space and to overcome the barriers separating metastable structures, these simulations are based on the replica exchange molecular dynamics technique. We report different tetragonal hydrogen bond patterns, which are classified as nearly square or as rhombic. While many of these arrangements are essentially flat, in some cases puckered arrangements are found, too. Also the proton ordering of the quasi-2D water structures is considered, allowing us to identify them as ferroelectric, ferrielectric or antiferroelectric. For temperatures between 200 K and 400 K we find several second-order phase transitions from one ice structure to another, changing in many cases both the arrangements of the oxygen atoms and the proton ordering. For temperatures between 400 K and 600 K there are melting-like transitions from a monolayer of ice to a monolayer of liquid water. These first-order phase transitions have a latent heat between 3.4 and 4.0 kJ mol-1. Both the values of the transition temperatures and of the latent heats display considerable model dependence for the five different water models investigated here.
Collapse
Affiliation(s)
- Shujuan Li
- Institute for Mathematics, Freie Universität Berlin, Arnimallee 6, D-14195 Berlin, Germany.
| | | |
Collapse
|
26
|
Shi R, Tanaka H. Homogeneous nucleation of ferroelectric ice crystal driven by spontaneous dipolar ordering in supercooled TIP5P water. J Chem Phys 2019; 151:024501. [DOI: 10.1063/1.5100634] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Rui Shi
- Department of Fundamental Engineering, Institute of Industrial Science, University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan
| | - Hajime Tanaka
- Department of Fundamental Engineering, Institute of Industrial Science, University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan
| |
Collapse
|
27
|
Elgabarty H, Kaliannan NK, Kühne TD. Enhancement of the local asymmetry in the hydrogen bond network of liquid water by an ultrafast electric field pulse. Sci Rep 2019; 9:10002. [PMID: 31292493 PMCID: PMC6620291 DOI: 10.1038/s41598-019-46449-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2019] [Accepted: 06/27/2019] [Indexed: 11/18/2022] Open
Abstract
Condensed phase electron decomposition analysis based on density functional theory has recently revealed an asymmetry in the hydrogen-bond network in liquid water, in the sense that a significant population of water molecules are simultaneously donating and accepting one strong hydrogen-bond and another substantially weaker one. Here we investigate this asymmetry, as well as broader structural and energetic features of water's hydrogen-bond network, following the application of an intense electric field square pulse that invokes the ultrafast reorientation of water molecules. We find that the necessary field-strength required to invoke an ultrafast alignment in a picosecond time window is on the order of 108 Vm-1. The resulting orientational anisotropy imposes an experimentally measurable signature on the structure and dynamics of the hydrogen-bond network, including its asymmetry, which is strongly enhanced. The dependence of the molecular reorientation dynamics on the field-strength can be understood by relating the magnitude of the water dipole-field interaction to the rotational kinetic energy, as well as the hydrogen-bond energy.
Collapse
Affiliation(s)
- Hossam Elgabarty
- Dynamics of Condensed Matter and Center for Sustainable Systems Design, Chair of Theoretical Chemistry, University of Paderborn, Warburger Str. 100, D-33098, Paderborn, Germany
| | - Naveen Kumar Kaliannan
- Dynamics of Condensed Matter and Center for Sustainable Systems Design, Chair of Theoretical Chemistry, University of Paderborn, Warburger Str. 100, D-33098, Paderborn, Germany
| | - Thomas D Kühne
- Dynamics of Condensed Matter and Center for Sustainable Systems Design, Chair of Theoretical Chemistry, University of Paderborn, Warburger Str. 100, D-33098, Paderborn, Germany.
- Paderborn Center for Parallel Computing and Institute for Lightweight Design, University of Paderborn, Warburger Str. 100, D-33098, Paderborn, Germany.
| |
Collapse
|
28
|
Park T, Kwon TH. Effect of Electric Field on Gas Hydrate Nucleation Kinetics: Evidence for the Enhanced Kinetics of Hydrate Nucleation by Negatively Charged Clay Surfaces. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2018; 52:3267-3274. [PMID: 29397706 DOI: 10.1021/acs.est.7b05477] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Natural gas hydrates are found widely in oceanic clay-rich sediments, where clay-water interactions have a profound effect on the formation behavior of gas hydrates. However, it remains unclear why and how natural gas hydrates are formed in clay-rich sediments in spite of factors that limit gas hydrate formation, such as small pore size and high salinity. Herein, we show that polarized water molecules on clay surfaces clearly promote gas hydrate nucleation kinetics. When water molecules were polarized with an electric field of 104 V/m, gas hydrate nucleation occurred significantly faster with an induction time reduced by 5.8 times. Further, the presence of strongly polarized water layers at the water-gas interface hindered gas uptake and thus hydrate formation, when the electric field was applied prior to gas dissolution. Our findings expand our understanding of the formation habits of naturally occurring gas hydrates in clay-rich sedimentary deposits and provide insights into gas production from natural hydrate deposits.
Collapse
Affiliation(s)
- Taehyung Park
- Department of Civil and Environmental Engineering , Korea Advanced Institute of Science and Technology (KAIST) , Daejeon , 34141 , Korea
| | - Tae-Hyuk Kwon
- Department of Civil and Environmental Engineering , Korea Advanced Institute of Science and Technology (KAIST) , Daejeon , 34141 , Korea
| |
Collapse
|
29
|
Zhang Z, Liu XY. Control of ice nucleation: freezing and antifreeze strategies. Chem Soc Rev 2018; 47:7116-7139. [DOI: 10.1039/c8cs00626a] [Citation(s) in RCA: 139] [Impact Index Per Article: 23.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Water freezing remains a perennial topic of great relevance to many important aspects of our lives; from the climate to human society and from economics to medicine, frozen water profoundly influences our living environment and life activities.
Collapse
Affiliation(s)
- Zhisen Zhang
- Research Institute for Biomimetics and Soft Matter
- Fujian Provincial Key Laboratory for Soft Functional Materials Research
- Department of Physics
- Department of Biomaterials
- Xiamen University
| | - Xiang-Yang Liu
- Research Institute for Biomimetics and Soft Matter
- Fujian Provincial Key Laboratory for Soft Functional Materials Research
- Department of Physics
- Department of Biomaterials
- Xiamen University
| |
Collapse
|
30
|
Fundamental interfacial mechanisms underlying electrofreezing. Adv Colloid Interface Sci 2018; 251:26-43. [PMID: 29289337 DOI: 10.1016/j.cis.2017.12.003] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2017] [Revised: 11/19/2017] [Accepted: 12/03/2017] [Indexed: 11/24/2022]
Abstract
This article reviews the fundamental interfacial mechanisms underlying electrofreezing (promotion of ice nucleation via the application of an electric field). Electrofreezing has been an active research topic for many decades, with applications in food preservation, cryopreservation, cryogenics and ice formation. There is substantial literature detailing experimental and simulations-based studies, which aim to understand the complex mechanisms underlying accelerated ice nucleation in the presence of electric fields and electrical charge. This work provides a critical review of all such studies. It is noted that application-focused studies of electrofreezing are excluded from this review; such studies have been previously reviewed in literature. This review focuses only on fundamental studies, which analyze the physical mechanisms underlying electrofreezing. Topics reviewed include experimental studies on electrofreezing (DC and AC electric fields), pyroelectricity-based control of freezing, molecular dynamics simulations of electrofreezing, and thermodynamics-based explanations of electrofreezing. Overall, it is seen that electrofreezing can enable disruptive advancements in the control of liquid-to-solid phase change, and that our current understanding of the underlying mechanisms can be significantly improved through further studies of various interfacial effects coming into play.
Collapse
|
31
|
Celebi AT, Barisik M, Beskok A. Electric field controlled transport of water in graphene nano-channels. J Chem Phys 2017; 147:164311. [DOI: 10.1063/1.4996210] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Affiliation(s)
- Alper Tunga Celebi
- Lyle School of Engineering, Southern Methodist University, Dallas, Texas 75205, USA
| | - Murat Barisik
- Department of Mechanical Engineering, Izmir Institute of Technology, Izmir, Turkey
| | - Ali Beskok
- Lyle School of Engineering, Southern Methodist University, Dallas, Texas 75205, USA
| |
Collapse
|
32
|
Alaghemandi M, Koller V, Green JR. Nonexponential kinetics of ion pair dissociation in electrofreezing water. Phys Chem Chem Phys 2017; 19:26396-26402. [PMID: 28944386 DOI: 10.1039/c7cp04572g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Temporally- or spatially-heterogeneous environments can participate in many kinetic processes, from chemical reactions and self-assembly to the forced dissociation of biomolecules. Here, we simulate the molecular dynamics of a model ion pair forced to dissociate in an explicit, aqueous solution. Triggering dissociation with an external electric field causes the surrounding water to electrofreeze and the ion pair population to decay nonexponentially. To further probe the role of the aqueous environment in the kinetics, we also simulate dissociation events under a purely mechanical force on the ion pair. In this case, regardless of whether the surrounding water is a liquid or already electrofrozen, the ion pair population decays exponentially with a well-defined rate constant that is specific to the medium and applied force. These simulation data, and the rate parameters we extract, suggest the disordered kinetics in an electrofreezing medium are a result of the comparable time scales of two concurrent processes, electrofreezing and dissociation.
Collapse
Affiliation(s)
- Mohammad Alaghemandi
- Department of Chemistry, University of Massachusetts Boston, Boston, MA 02125, USA.
| | | | | |
Collapse
|
33
|
Water Molecules in a Carbon Nanotube under an Applied Electric Field at Various Temperatures and Pressures. WATER 2017. [DOI: 10.3390/w9070473] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
34
|
Nie GX, Huang JY, Huang JP. Melting–Freezing Transition of Monolayer Water Confined by Phosphorene Plates. J Phys Chem B 2016; 120:9011-8. [DOI: 10.1021/acs.jpcb.6b02473] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- G. X. Nie
- Department
of Physics and State Key Laboratory of Surface Physics, Fudan University, Shanghai 200433, China
- Collaborative Innovation Center of Advanced Microstructures, Nanjing 210093, China
| | - J. Y. Huang
- Department
of Physics and State Key Laboratory of Surface Physics, Fudan University, Shanghai 200433, China
- Collaborative Innovation Center of Advanced Microstructures, Nanjing 210093, China
| | - J. P. Huang
- Department
of Physics and State Key Laboratory of Surface Physics, Fudan University, Shanghai 200433, China
- Collaborative Innovation Center of Advanced Microstructures, Nanjing 210093, China
| |
Collapse
|
35
|
Zhu Y, Wang F, Wu H. Buckling failure of square ice-nanotube arrays constrained in graphene nanocapillaries. J Chem Phys 2016; 145:054704. [PMID: 27497569 DOI: 10.1063/1.4959902] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Graphene confinement provides a new physical and mechanical environment with ultrahigh van der Waals pressure, resulting in new quasi-two-dimensional phases of few-layer ice. Polymorphic transition can occur in bilayer constrained water/ice system. Here, we perform a comprehensive study of the phase transition of AA-stacked bilayer water constrained within a graphene nanocapillary. The compression-limit and superheating-limit (phase) diagrams are obtained, based on the extensive molecular-dynamics simulations at numerous thermodynamic states. Liquid-to-solid, solid-to-solid, and solid-to-liquid-to-solid phase transitions are observed in the compression and superheating of bilayer water. Interestingly, there is a temperature threshold (∼275 K) in the compression-limit diagram, which indicates that the first-order and continuous-like phase transitions of bilayer water depend on the temperature. Two obviously different physical processes, compression and superheating, display similar structural evolution; that is, square ice-nanotube arrays (BL-VHDI) will bend first and then transform into bilayer triangular AA stacking ice (BL-AAI). The superheating limit of BL-VHDI exhibits local maxima, while that of BL-AAI increases monotonically. More importantly, from a mechanics point of view, we propose a novel mechanism of the transformation from BL-VHDI to BL-AAI, both for the compression and superheating limits. This structural transformation can be regarded as the "buckling failure" of the square-ice-nanotube columns, which is dominated by the lateral pressure.
Collapse
Affiliation(s)
- YinBo Zhu
- CAS Key Laboratory of Mechanical Behavior and Design of Materials, Department of Modern Mechanics, CAS Center for Excellence in Nanoscience, University of Science and Technology of China, Hefei, Anhui 230027, China
| | - FengChao Wang
- CAS Key Laboratory of Mechanical Behavior and Design of Materials, Department of Modern Mechanics, CAS Center for Excellence in Nanoscience, University of Science and Technology of China, Hefei, Anhui 230027, China
| | - HengAn Wu
- CAS Key Laboratory of Mechanical Behavior and Design of Materials, Department of Modern Mechanics, CAS Center for Excellence in Nanoscience, University of Science and Technology of China, Hefei, Anhui 230027, China
| |
Collapse
|
36
|
A Theoretical Study of the Hydration of Methane, from the Aqueous Solution to the sI Hydrate-Liquid Water-Gas Coexistence. Int J Mol Sci 2016; 17:ijms17060378. [PMID: 27240339 PMCID: PMC4926321 DOI: 10.3390/ijms17060378] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2015] [Revised: 02/24/2016] [Accepted: 02/26/2016] [Indexed: 11/30/2022] Open
Abstract
Monte Carlo and molecular dynamics simulations were done with three recent water models TIP4P/2005 (Transferable Intermolecular Potential with 4 Points/2005), TIP4P/Ice (Transferable Intermolecular Potential with 4 Points/ Ice) and TIP4Q (Transferable Intermolecular Potential with 4 charges) combined with two models for methane: an all-atom one OPLS-AA (Optimal Parametrization for the Liquid State) and a united-atom one (UA); a correction for the C–O interaction was applied to the latter and used in a third set of simulations. The models were validated by comparison to experimental values of the free energy of hydration at 280, 300, 330 and 370 K, all under a pressure of 1 bar, and to the experimental radial distribution functions at 277, 283 and 291 K, under a pressure of 145 bar. Regardless of the combination rules used for σC,O, good agreement was found, except when the correction to the UA model was applied. Thus, further simulations of the sI hydrate were performed with the united-atom model to compare the thermal expansivity to the experiment. A final set of simulations was done with the UA methane model and the three water models, to study the sI hydrate-liquid water-gas coexistence at 80, 230 and 400 bar. The melting temperatures were compared to the experimental values. The results show the need to perform simulations with various different models to attain a reliable and robust molecular image of the systems of interest.
Collapse
|
37
|
Neek-Amal M, Peeters FM, Grigorieva IV, Geim AK. Commensurability Effects in Viscosity of Nanoconfined Water. ACS NANO 2016; 10:3685-3692. [PMID: 26882095 DOI: 10.1021/acsnano.6b00187] [Citation(s) in RCA: 107] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The rate of water flow through hydrophobic nanocapillaries is greatly enhanced as compared to that expected from macroscopic hydrodynamics. This phenomenon is usually described in terms of a relatively large slip length, which is in turn defined by such microscopic properties as the friction between water and capillary surfaces and the viscosity of water. We show that the viscosity of water and, therefore, its flow rate are profoundly affected by the layered structure of confined water if the capillary size becomes less than 2 nm. To this end, we study the structure and dynamics of water confined between two parallel graphene layers using equilibrium molecular dynamics simulations. We find that the shear viscosity is not only greatly enhanced for subnanometer capillaries, but also exhibits large oscillations that originate from commensurability between the capillary size and the size of water molecules. Such oscillating behavior of viscosity and, consequently, the slip length should be taken into account in designing and studying graphene-based and similar membranes for desalination and filtration.
Collapse
Affiliation(s)
- Mehdi Neek-Amal
- Department of Physics, Shahid Rajaee Teacher Training University , Lavizan, 16785-136 Tehran, Iran
| | - Francois M Peeters
- Departement Fysica, Universiteit Antwerpen , Groenenborgerlaan 171, B-2020 Antwerpen, Belgium
| | - Irina V Grigorieva
- School of Physics and Astronomy, University of Manchester , Manchester M13 9PL, United Kingdom
| | - Andre K Geim
- School of Physics and Astronomy, University of Manchester , Manchester M13 9PL, United Kingdom
| |
Collapse
|
38
|
English NJ, Waldron CJ. Perspectives on external electric fields in molecular simulation: progress, prospects and challenges. Phys Chem Chem Phys 2016; 17:12407-40. [PMID: 25903011 DOI: 10.1039/c5cp00629e] [Citation(s) in RCA: 143] [Impact Index Per Article: 17.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
In this review, the application of a wide variety of external electric fields in molecular simulation shall be discussed, including time-varying and electromagnetic, as well as the utility and potential impact and prospects for exploitation of such simulations for real-world and industrial end use. In particular, non-equilibrium molecular dynamics will be discussed, as well as challenges in addressing adequate thermostatting and scaling field amplitudes to more experimentally relevant levels. Attention shall be devoted to recent progress and advances in external fields in ab initio molecular simulation and dynamics, as well as elusive challenges thereof (and, to some extent, for molecular dynamics from empirical potentials), such as timescales required to observe low-frequency and intensity field effects. The challenge of deterministic molecular dynamics in external fields in sampling phase space shall be discussed, along with prospects for application of fields in enhanced-sampling simulations. Finally, the application of external electric fields to a wide variety of aqueous, nanoscale and biological systems will be discussed, often motivated by the possibility of exploitation in real-world applications, which serve to underpin our molecular-level understanding of field effects in terms of microscopic mechanisms, and possibly with a view to control thereof.
Collapse
Affiliation(s)
- Niall J English
- School of Chemical and Bioprocess Engineering, University College Dublin, Belfield, Dublin 4, Ireland.
| | | |
Collapse
|
39
|
|
40
|
Cheng L, Sun DW, Zhu Z, Zhang Z. Emerging techniques for assisting and accelerating food freezing processes: A review of recent research progresses. Crit Rev Food Sci Nutr 2015; 57:769-781. [DOI: 10.1080/10408398.2015.1004569] [Citation(s) in RCA: 133] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
41
|
|
42
|
Ren H, Zhang L, Li X, Li Y, Wu W, Li H. Interfacial structure and wetting properties of water droplets on graphene under a static electric field. Phys Chem Chem Phys 2015; 17:23460-7. [DOI: 10.1039/c5cp04205d] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The equilibrium water droplets present a hemispherical, a conical and an ordered cylindrical shape with the increase of external E-field intensity.
Collapse
Affiliation(s)
- Hongru Ren
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials
- Ministry of Education
- Shandong University
- Jinan 250061
- People's Republic of China
| | - Leining Zhang
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials
- Ministry of Education
- Shandong University
- Jinan 250061
- People's Republic of China
| | - Xiongying Li
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials
- Ministry of Education
- Shandong University
- Jinan 250061
- People's Republic of China
| | - Yifan Li
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials
- Ministry of Education
- Shandong University
- Jinan 250061
- People's Republic of China
| | - Weikang Wu
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials
- Ministry of Education
- Shandong University
- Jinan 250061
- People's Republic of China
| | - Hui Li
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials
- Ministry of Education
- Shandong University
- Jinan 250061
- People's Republic of China
| |
Collapse
|
43
|
Yan JY, Overduin SD, Patey GN. Understanding electrofreezing in water simulations. J Chem Phys 2014; 141:074501. [DOI: 10.1063/1.4892586] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
|
44
|
Qian Z, Wei G. Electric-Field-Induced Phase Transition of Confined Water Nanofilms between Two Graphene Sheets. J Phys Chem A 2014; 118:8922-8. [DOI: 10.1021/jp500989t] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Zhenyu Qian
- State Key
Laboratory of Surface
Physics, Key Laboratory for Computational Physical Sciences (MOE),
and Department of Physics, Fudan University, Shanghai 200433, P. R. China
| | - Guanghong Wei
- State Key
Laboratory of Surface
Physics, Key Laboratory for Computational Physical Sciences (MOE),
and Department of Physics, Fudan University, Shanghai 200433, P. R. China
| |
Collapse
|
45
|
Zhu X, Yuan Q, Zhao YP. Phase transitions of a water overlayer on charged graphene: from electromelting to electrofreezing. NANOSCALE 2014; 6:5432-5437. [PMID: 24718284 DOI: 10.1039/c3nr06596k] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
We show by using molecular dynamics simulations that a water overlayer on charged graphene experiences first-order ice-to-liquid (electromelting), and then liquid-to-ice (electrofreezing) phase transitions with the increase of the charge value. Corresponding to the ice-liquid-ice transition, the variations of the order parameters indicate an order-disorder-order transition. The key to this novel phenomenon is the surface charge induced change of the orientations of water dipoles, which leads to the change of the water-water interactions from being attractive to repulsive at a critical charge value qc. To further uncover how the orientations of water dipoles influence the interaction strength between water molecules, a theoretical model considering both the Coulomb and van der Waals interactions is established. The results show that with the increase of the charge value, the interaction strength between water molecules decreases below qc, then increases above qc. These two inverse processes lead to electromelting and electrofreezing, respectively. Combining this model with the Eyring equation, the diffusion coefficient is obtained, the variation of which is in qualitative agreement with the simulation results. Our findings not only expand our knowledge of the graphene-water interface, but related analyses could also help recognize the controversial role of the surface charge or electric field in promoting phase transitions of water.
Collapse
Affiliation(s)
- Xueyan Zhu
- State Key Laboratory of Nonlinear Mechanics, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, People's Republic of China.
| | | | | |
Collapse
|
46
|
Jia M, Zhao WH, Yuan LF. New Hexagonal-rhombic Trilayer Ice Structure Confined between Hydrophobic Plates. CHINESE J CHEM PHYS 2014. [DOI: 10.1063/1674-0068/27/01/15-19] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
|
47
|
Vanzo D, Bratko D, Luzar A. Nanoconfined water under electric field at constant chemical potential undergoes electrostriction. J Chem Phys 2014; 140:074710. [DOI: 10.1063/1.4865126] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
|
48
|
Zhao WH, Bai J, Yuan LF, Yang J, Zeng XC. Ferroelectric hexagonal and rhombic monolayer ice phases. Chem Sci 2014. [DOI: 10.1039/c3sc53368a] [Citation(s) in RCA: 78] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Two new monolayer ice phases are predicted from molecular dynamics simulations, both proven to be ferroelectric.
Collapse
Affiliation(s)
- Wen-Hui Zhao
- Department of Chemical Physics
- Hefei National Laboratory for Physical Sciences at Microscale
- University of Science and Technology of China
- Hefei, China
| | - Jaeil Bai
- Department of Chemistry and Nebraska Center for Materials and Nanoscience
- University of Nebraska-Lincoln
- Lincoln, USA
| | - Lan-Feng Yuan
- Department of Chemical Physics
- Hefei National Laboratory for Physical Sciences at Microscale
- University of Science and Technology of China
- Hefei, China
| | - Jinlong Yang
- Department of Chemical Physics
- Hefei National Laboratory for Physical Sciences at Microscale
- University of Science and Technology of China
- Hefei, China
| | - Xiao Cheng Zeng
- Department of Chemistry and Nebraska Center for Materials and Nanoscience
- University of Nebraska-Lincoln
- Lincoln, USA
| |
Collapse
|
49
|
|
50
|
Huang Y, Ma Z, Zhang X, Zhou G, Zhou Y, Sun CQ. Hydrogen Bond Asymmetric Local Potentials in Compressed Ice. J Phys Chem B 2013; 117:13639-45. [PMID: 24090472 DOI: 10.1021/jp407836n] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Yongli Huang
- Key
Laboratory of Low-dimensional Materials and Application Technology
(Ministry of Education) and Faculty of Materials, Optoelectronics
and Physics, Xiangtan University, Xiangtan 411105, China
| | - Zengsheng Ma
- Key
Laboratory of Low-dimensional Materials and Application Technology
(Ministry of Education) and Faculty of Materials, Optoelectronics
and Physics, Xiangtan University, Xiangtan 411105, China
| | - Xi Zhang
- NOVITAS,
School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore 639798
- Center
for Coordination Bond and Electronic Engineering, College of Materials
Science and Engineering, China Jiliang University, Hangzhou 310018, China
| | - Guanghui Zhou
- Department
of Physics and Key Laboratory for Low-Dimensional Structures and Quantum
Manipulation (Ministry of Education), Hunan Normal University, Changsha 410081, China
| | - Yichun Zhou
- Key
Laboratory of Low-dimensional Materials and Application Technology
(Ministry of Education) and Faculty of Materials, Optoelectronics
and Physics, Xiangtan University, Xiangtan 411105, China
| | - Chang Q. Sun
- Key
Laboratory of Low-dimensional Materials and Application Technology
(Ministry of Education) and Faculty of Materials, Optoelectronics
and Physics, Xiangtan University, Xiangtan 411105, China
- NOVITAS,
School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore 639798
- Center
for Coordination Bond and Electronic Engineering, College of Materials
Science and Engineering, China Jiliang University, Hangzhou 310018, China
| |
Collapse
|