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Carlson SR, Schullian O, Becker MR, Netz RR. Modeling Water Interactions with Graphene and Graphite via Force Fields Consistent with Experimental Contact Angles. J Phys Chem Lett 2024; 15:6325-6333. [PMID: 38856977 DOI: 10.1021/acs.jpclett.4c01143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2024]
Abstract
Accurate simulation models for water interactions with graphene and graphite are important for nanofluidic applications, but existing force fields produce widely varying contact angles. Our extensive review of the experimental literature reveals extreme variation among reported values of graphene-water contact angles and a clustering of graphite-water contact angles into groups of freshly exfoliated (60° ± 13°) and not-freshly exfoliated graphite surfaces. The carbon-oxygen dispersion energy for a classical force field is optimized with respect to this 60° graphite-water contact angle in the infinite-force-cutoff limit, which in turn yields a contact angle for unsupported graphene of 80°, in agreement with the mean of the experimental results. Interaction force fields for finite cutoffs are also derived. A method for calculating contact angles from pressure tensors of planar equilibrium simulations that is ideally suited to graphite and graphene surfaces is introduced. Our methodology is widely applicable to any liquid-surface combination.
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Affiliation(s)
- Shane R Carlson
- Fachbereich Physik, Freie Universität Berlin, Arnimallee 14, D-14195 Berlin, Germany
| | - Otto Schullian
- Fachbereich Physik, Freie Universität Berlin, Arnimallee 14, D-14195 Berlin, Germany
- Department of Biomaterials, Max Planck Institute of Colloids and Interfaces, D-14424 Potsdam, Germany
| | - Maximilian R Becker
- Fachbereich Physik, Freie Universität Berlin, Arnimallee 14, D-14195 Berlin, Germany
| | - Roland R Netz
- Fachbereich Physik, Freie Universität Berlin, Arnimallee 14, D-14195 Berlin, Germany
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2
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Guo T, Wan Z, Panahi-Sarmad M, Banvillet G, Lu Y, Zargar S, Tian J, Jiang F, Mao Y, Tu Q, Rojas OJ. Chitin Nanofibers Enable the Colloidal Dispersion of Carbon Nanomaterials in Aqueous Phase and Hybrid Material Coassembly. ACS NANO 2024; 18:14954-14967. [PMID: 38820368 DOI: 10.1021/acsnano.4c00549] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2024]
Abstract
Chitin nanofibrils (ChNF) sourced from discarded marine biomass are shown as effective stabilizers of carbon nanomaterials in aqueous media. Such stabilization is evaluated for carbon nanotubes (CNT) considering spatial and temporal perspectives by using experimental (small-angle X-ray scattering, among others) and theoretical (atomistic simulation) approaches. We reveal that the coassembly of ChNF and CNT is governed by hydrophobic interactions, while electrostatic repulsion drives the colloidal stabilization of the hybrid ChNF/CNT system. Related effects are found to be transferable to multiwalled carbon nanotubes and graphene nanosheets. The observations explain the functionality of hybrid membranes obtained by aqueous phase processing, which benefit from an excellent areal mass distribution (correlated to piezoresistivity), also contributing to high electromechanical performance. The water resistance and flexibility of the ChNF/CNT membranes (along with its tensile strength at break of 190 MPa, conductivity of up to 426 S/cm, and piezoresistivity and light absorption properties) are conveniently combined in a device demonstration, a sunlight water evaporator. The latter is shown to present a high evaporation rate (as high as 1.425 kg water m-2 h-1 under one sun illumination) and recyclability.
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Affiliation(s)
- Tianyu Guo
- Bioproducts Institute, Department of Chemical and Biological Engineering, University of British Columbia, 2360 East Mall, Vancouver, British Columbia V6T 1Z3, Canada
| | - Zhangmin Wan
- Bioproducts Institute, Department of Chemical and Biological Engineering, University of British Columbia, 2360 East Mall, Vancouver, British Columbia V6T 1Z3, Canada
| | - Mahyar Panahi-Sarmad
- Bioproducts Institute, Department of Chemical and Biological Engineering, University of British Columbia, 2360 East Mall, Vancouver, British Columbia V6T 1Z3, Canada
- Sustainable Functional Biomaterials Laboratory, Department of Wood Science, The University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada
| | - Gabriel Banvillet
- Bioproducts Institute, Department of Chemical and Biological Engineering, University of British Columbia, 2360 East Mall, Vancouver, British Columbia V6T 1Z3, Canada
| | - Yi Lu
- Bioproducts Institute, Department of Chemical and Biological Engineering, University of British Columbia, 2360 East Mall, Vancouver, British Columbia V6T 1Z3, Canada
| | - Shiva Zargar
- Sustainable Bioeconomy Research Group, Department of Wood Science, The University of British Columbia, 2424 Main Mall, Vancouver, British Columbia V6T 1 Z4, Canada
| | - Jing Tian
- Bioproducts Institute, Department of Chemical and Biological Engineering, University of British Columbia, 2360 East Mall, Vancouver, British Columbia V6T 1Z3, Canada
| | - Feng Jiang
- Sustainable Functional Biomaterials Laboratory, Department of Wood Science, The University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada
| | - Yimin Mao
- Department of Materials Science and Engineering, University of Maryland, College Park, Maryland 20742, United States
- NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, United States
| | - Qingshi Tu
- Sustainable Bioeconomy Research Group, Department of Wood Science, The University of British Columbia, 2424 Main Mall, Vancouver, British Columbia V6T 1 Z4, Canada
| | - Orlando J Rojas
- Bioproducts Institute, Department of Chemical and Biological Engineering, University of British Columbia, 2360 East Mall, Vancouver, British Columbia V6T 1Z3, Canada
- Department of Chemistry, The University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada
- Department of Wood Science, The University of British Columbia, 2900-2424 Main Mall, Vancouver, British Columbia V6T 1Z4, Canada
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3
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Wang Y, Tang F, Yu X, Ohto T, Nagata Y, Bonn M. Heterodyne-Detected Sum-Frequency Generation Vibrational Spectroscopy Reveals Aqueous Molecular Structure at the Suspended Graphene/Water Interface. Angew Chem Int Ed Engl 2024; 63:e202319503. [PMID: 38478726 DOI: 10.1002/anie.202319503] [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: 12/17/2023] [Indexed: 04/12/2024]
Abstract
Graphene, a transparent two-dimensional conductive material, has brought extensive new perspectives and prospects to various aqueous technological systems, such as desalination membranes, chemical sensors, energy storage, and energy conversion devices. Yet, the molecular-level details of graphene in contact with aqueous electrolytes, such as water orientation and hydrogen bond structure, remain elusive or controversial. Here, we employ surface-specific heterodyne-detected sum-frequency generation (HD-SFG) vibrational spectroscopy to re-examine the water molecular structure at a freely suspended graphene/water interface. We compare the response from the air/graphene/water system to that from the air/water interface. Our results indicate that theχ y y z 2 ${{\chi }_{yyz}^{\left(2\right)}}$ spectrum recorded from the air/graphene/water system arises from the topmost 1-2 water layers in contact with the graphene, with the graphene itself not generating a significant SFG response. Compared to the air/water interface response, the presence of monolayer graphene weakly affects the interfacial water. Graphene weakly affects the dangling O-H group, lowering its frequency through its interaction with the graphene sheet, and has a very small effect on the hydrogen-bonded O-H group. Molecular dynamics simulations confirm our experimental observation. Our work provides molecular insight into the interfacial structure at a suspended graphene/water interface, relevant to various technological applications of graphene.
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Affiliation(s)
- Yongkang Wang
- Molecular Spectroscopy Department, Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany
| | - Fujie Tang
- Pen-Tung Sah Institute of Micro-Nano Science and Technology, Xiamen University, 361005, Xiamen, China
- Laboratory of AI for Electrochemistry (AI4EC), IKKEM, 361005, Xiamen, China
| | - Xiaoqing Yu
- Molecular Spectroscopy Department, Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany
| | - Tatsuhiko Ohto
- Graduate School of Engineering, Nagoya University, Nagoya, 464-8603, Japan
| | - Yuki Nagata
- Molecular Spectroscopy Department, Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany
| | - Mischa Bonn
- Molecular Spectroscopy Department, Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany
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4
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Wang Y, Nagata Y, Bonn M. Substrate effect on charging of electrified graphene/water interfaces. Faraday Discuss 2024; 249:303-316. [PMID: 37772472 DOI: 10.1039/d3fd00107e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/30/2023]
Abstract
Graphene, a transparent two-dimensional (2D) conductive electrode, has brought extensive new perspectives and prospects to electrochemical systems, such as chemical sensors, energy storage, and energy conversion devices. In many of these applications, graphene, supported on a substrate, is in contact with an aqueous solution. An increasing number of studies indicate that the substrate, rather than graphene, determines the organization of water in contact with graphene, i.e., the electric double layer (EDL) structure near the electrified graphene, and the wetting behavior of the graphene: the graphene sheet is transparent in terms of its supporting substrate. By applying surface-specific heterodyne-detected sum-frequency generation (HD-SFG) spectroscopy to the silicon dioxide (SiO2)-supported graphene electrode/aqueous electrolyte interface and comparing the data with those for the calcium fluoride (CaF2)-supported graphene [Y. Wang et al., Angew. Chem., Int. Ed., 2023, 62, e202216604], we discuss the impact of the different substrates on the charging of both the graphene and the substrate upon applying potentials. The SiO2-supported graphene shows pseudocapacitive behavior, consistent with the CaF2-supported graphene case, although the surface charges on SiO2 and CaF2 differ substantially. The SiO2 surface is already negatively charged at +0.57 V (vs. Pd/H2), and the negative surface charge is doubled when negative potentials are applied, in contrast with the CaF2 case, where the positive charge is reduced when negative potentials are applied. Interestingly, the charging of the graphene sheet is almost identical between the negatively charged SiO2 surface and positively charged CaF2 surface, demonstrating that the graphene charging is decoupled from the charging of the substrates.
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Affiliation(s)
- Yongkang Wang
- Molecular Spectroscopy Department, Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany.
| | - Yuki Nagata
- Molecular Spectroscopy Department, Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany.
| | - Mischa Bonn
- Molecular Spectroscopy Department, Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany.
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5
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Papaderakis AA, Roh JS, Polus K, Yang J, Bissett MA, Walton A, Juel A, Dryfe RAW. Dielectric-free electrowetting on graphene. Faraday Discuss 2023; 246:307-321. [PMID: 37409473 DOI: 10.1039/d3fd00037k] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/13/2023]
Abstract
Electrowetting is a simple way to induce the spreading and retraction of electrolyte droplets. This method is widely used in "device" applications, where a dielectric layer is applied between the electrolyte and the conducting substrate. Recent work, including contributions from our own laboratory, have shown that reversible electrowetting can be achieved directly on conductors. We have shown that graphite surfaces, in particular when combined with highly concentrated electrolyte solutions, show a strong wetting effect. The process is driven by the interactions between the electrolyte ions and the surface, hence models of double-layer capacitance are able to explain changes in the equilibrium contact angles. Herein, we extend the approach to the investigation of electrowetting on graphene samples of varying thickness, prepared by chemical vapor deposition. We show that the use of highly concentrated aqueous electrolytes induces a clear yet subtle electrowetting response due to the adsorption of ions and the suppression of the negative effect introduced by the surface impurities accumulating during the transfer process. The latter have been previously reported to fully hinder electrowetting at lower electrolyte concentrations. An amplified wetting response is recorded in the presence of strongly adsorbed/intercalated anions in both aqueous and non-aqueous electrolytes. The phenomenon is interpreted based on the anion-graphene interactions and their influence on the energetics of the interface. By monitoring the dynamics of wetting, an irreversible behaviour is identified in all cases as a consequence of the irreversibility of anion adsorption and/or intercalation. Finally, the effect of the underlying reactions on the timescales of wetting is also examined.
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Affiliation(s)
- Athanasios A Papaderakis
- Department of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL, UK.
- Henry Royce Institute, University of Manchester, Oxford Road, Manchester, M13 9PL, UK
| | - Ji Soo Roh
- National Graphene Institute, University of Manchester, Oxford Road, Manchester, M13 9PL, UK
- Department of Materials, University of Manchester, Oxford Road, Manchester, M13 9PL, UK
| | - Kacper Polus
- Department of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL, UK.
- Photon Science Institute, University of Manchester, Oxford Road, Manchester, M13 9PL, UK
| | - Jing Yang
- Department of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL, UK.
- Henry Royce Institute, University of Manchester, Oxford Road, Manchester, M13 9PL, UK
| | - Mark A Bissett
- National Graphene Institute, University of Manchester, Oxford Road, Manchester, M13 9PL, UK
- Department of Materials, University of Manchester, Oxford Road, Manchester, M13 9PL, UK
| | - Alex Walton
- Department of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL, UK.
- Photon Science Institute, University of Manchester, Oxford Road, Manchester, M13 9PL, UK
| | - Anne Juel
- Department of Physics and Astronomy, University of Manchester, Oxford Road, Manchester, M13 9PL, UK
| | - Robert A W Dryfe
- Department of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL, UK.
- Henry Royce Institute, University of Manchester, Oxford Road, Manchester, M13 9PL, UK
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6
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Kyrkjebø S, Cassidy A, Lambrick S, Jardine A, Holst B, Hornekær L. 3He spin-echo scattering indicates hindered diffusion of isolated water molecules on graphene-covered Ir(111). Front Chem 2023; 11:1229546. [PMID: 37867993 PMCID: PMC10587411 DOI: 10.3389/fchem.2023.1229546] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2023] [Accepted: 09/18/2023] [Indexed: 10/24/2023] Open
Abstract
The dynamics of water diffusion on carbon surfaces are of interest in fields as diverse as furthering the use of graphene as an industrial-coating technology and understanding the catalytic role of carbon-based dust grains in the interstellar medium. The early stages of water-ice growth and the mobility of water adsorbates are inherently dependent on the microscopic mechanisms that facilitate water diffusion. Here, we use 3He spin-echo quasi-inelastic scattering to probe the microscopic mechanisms responsible for the diffusion of isolated water molecules on graphene-covered and bare Ir(111). The scattering of He atoms provides a non-invasive and highly surface-sensitive means to measure the rate at which absorbates move around on a substrate at very low coverage. Our results provide an approximate upper limit on the diffusion coefficient for water molecules on GrIr(111) of < 10 - 12 m2/s, an order of magnitude lower than the coefficient that describes the diffusion of water molecules on the bare Ir(111) surface. We attribute the hindered diffusion of water molecules on the GrIr(111) surface to water trapping at specific areas of the corrugated moiré superstructure. Lower mobility of water molecules on a surface is expected to lead to a lower ice nucleation rate and may enhance the macroscopic anti-icing properties of a surface.
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Affiliation(s)
- Signe Kyrkjebø
- Center for Interstellar Catalysis, Department of Physics and Astronomy, Aarhus University, Aarhus, Denmark
- Interdisciplinary Nanoscience Center, Aarhus University, Aarhus, Denmark
| | - Andrew Cassidy
- Center for Interstellar Catalysis, Department of Physics and Astronomy, Aarhus University, Aarhus, Denmark
| | - Sam Lambrick
- Cavendish Laboratory, University of Cambridge, Cambridge, United Kingdom
| | - Andrew Jardine
- Cavendish Laboratory, University of Cambridge, Cambridge, United Kingdom
| | - Bodil Holst
- Institute of Physics and Technology, University of Bergen, Bergen, Norway
| | - Liv Hornekær
- Center for Interstellar Catalysis, Department of Physics and Astronomy, Aarhus University, Aarhus, Denmark
- Interdisciplinary Nanoscience Center, Aarhus University, Aarhus, Denmark
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7
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Bartczak N, Kowalczyk J, Tomala R, Stefanski M, Szymański D, Ptak M, Stręk W, Szustakiewicz K, Kurzynowski T, Szczepański Ł, Junka A, Gorczyca D, Głuchowski P. Effect of the Addition of Graphene Flakes on the Physical and Biological Properties of Composite Paints. Molecules 2023; 28:6173. [PMID: 37630425 PMCID: PMC10458452 DOI: 10.3390/molecules28166173] [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: 06/07/2023] [Revised: 08/17/2023] [Accepted: 08/18/2023] [Indexed: 08/27/2023] Open
Abstract
In this study, graphene flakes were obtained using an electrolytic method and characterized using X-ray diffraction (XRD), Raman and FTIR spectroscopy, scanning and transmission electron microscopy (SEM/TEM). Graphene-based composites with varying concentrations of 0.5%, 1% and 3% by weight were prepared with acrylic paint, enamel and varnish matrices. The mechanical properties were evaluated using micro-hardness testing, while wettability and antimicrobial activity against three pathogens (Staphylococcus aureus 33591, Pseudomonas aeruginosa 15442, Candida albicans 10231) were also examined. The results indicate that the addition of graphene flakes significantly enhances both the mechanical and antimicrobial properties of the coatings.
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Affiliation(s)
- Natalia Bartczak
- Institute of Low Temperature and Structure Research, Polish Academy of Sciences, PL-50422 Wroclaw, Poland; (J.K.); (R.T.); (M.S.); (D.S.); (M.P.); (W.S.)
- Faculty of Chemistry, Wroclaw University of Science and Technology, PL-50370 Wroclaw, Poland;
| | - Jerzy Kowalczyk
- Institute of Low Temperature and Structure Research, Polish Academy of Sciences, PL-50422 Wroclaw, Poland; (J.K.); (R.T.); (M.S.); (D.S.); (M.P.); (W.S.)
| | - Robert Tomala
- Institute of Low Temperature and Structure Research, Polish Academy of Sciences, PL-50422 Wroclaw, Poland; (J.K.); (R.T.); (M.S.); (D.S.); (M.P.); (W.S.)
| | - Mariusz Stefanski
- Institute of Low Temperature and Structure Research, Polish Academy of Sciences, PL-50422 Wroclaw, Poland; (J.K.); (R.T.); (M.S.); (D.S.); (M.P.); (W.S.)
| | - Damian Szymański
- Institute of Low Temperature and Structure Research, Polish Academy of Sciences, PL-50422 Wroclaw, Poland; (J.K.); (R.T.); (M.S.); (D.S.); (M.P.); (W.S.)
| | - Maciej Ptak
- Institute of Low Temperature and Structure Research, Polish Academy of Sciences, PL-50422 Wroclaw, Poland; (J.K.); (R.T.); (M.S.); (D.S.); (M.P.); (W.S.)
| | - Wiesław Stręk
- Institute of Low Temperature and Structure Research, Polish Academy of Sciences, PL-50422 Wroclaw, Poland; (J.K.); (R.T.); (M.S.); (D.S.); (M.P.); (W.S.)
| | - Konrad Szustakiewicz
- Faculty of Chemistry, Wroclaw University of Science and Technology, PL-50370 Wroclaw, Poland;
| | - Tomasz Kurzynowski
- Faculty of Mechanical Engineering, Wroclaw University of Science and Technology, PL-50370 Wroclaw, Poland; (T.K.); (Ł.S.)
| | - Łukasz Szczepański
- Faculty of Mechanical Engineering, Wroclaw University of Science and Technology, PL-50370 Wroclaw, Poland; (T.K.); (Ł.S.)
| | - Adam Junka
- Platform for Unique Models Application, Wroclaw Medical University, PL-50367 Wroclaw, Poland;
| | - Damian Gorczyca
- Medical Department, Lazarski University, PL-02662 Warsaw, Poland;
| | - Paweł Głuchowski
- Institute of Low Temperature and Structure Research, Polish Academy of Sciences, PL-50422 Wroclaw, Poland; (J.K.); (R.T.); (M.S.); (D.S.); (M.P.); (W.S.)
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8
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Wen Y, Liu Y. Controlled stretching and splitting behaviors of nanodroplets by designing surface wettability patterns. Chem Eng Sci 2023. [DOI: 10.1016/j.ces.2023.118635] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/18/2023]
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9
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Aluru NR, Aydin F, Bazant MZ, Blankschtein D, Brozena AH, de Souza JP, Elimelech M, Faucher S, Fourkas JT, Koman VB, Kuehne M, Kulik HJ, Li HK, Li Y, Li Z, Majumdar A, Martis J, Misra RP, Noy A, Pham TA, Qu H, Rayabharam A, Reed MA, Ritt CL, Schwegler E, Siwy Z, Strano MS, Wang Y, Yao YC, Zhan C, Zhang Z. Fluids and Electrolytes under Confinement in Single-Digit Nanopores. Chem Rev 2023; 123:2737-2831. [PMID: 36898130 PMCID: PMC10037271 DOI: 10.1021/acs.chemrev.2c00155] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/12/2023]
Abstract
Confined fluids and electrolyte solutions in nanopores exhibit rich and surprising physics and chemistry that impact the mass transport and energy efficiency in many important natural systems and industrial applications. Existing theories often fail to predict the exotic effects observed in the narrowest of such pores, called single-digit nanopores (SDNs), which have diameters or conduit widths of less than 10 nm, and have only recently become accessible for experimental measurements. What SDNs reveal has been surprising, including a rapidly increasing number of examples such as extraordinarily fast water transport, distorted fluid-phase boundaries, strong ion-correlation and quantum effects, and dielectric anomalies that are not observed in larger pores. Exploiting these effects presents myriad opportunities in both basic and applied research that stand to impact a host of new technologies at the water-energy nexus, from new membranes for precise separations and water purification to new gas permeable materials for water electrolyzers and energy-storage devices. SDNs also present unique opportunities to achieve ultrasensitive and selective chemical sensing at the single-ion and single-molecule limit. In this review article, we summarize the progress on nanofluidics of SDNs, with a focus on the confinement effects that arise in these extremely narrow nanopores. The recent development of precision model systems, transformative experimental tools, and multiscale theories that have played enabling roles in advancing this frontier are reviewed. We also identify new knowledge gaps in our understanding of nanofluidic transport and provide an outlook for the future challenges and opportunities at this rapidly advancing frontier.
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Affiliation(s)
- Narayana R Aluru
- Oden Institute for Computational Engineering and Sciences, Walker Department of Mechanical Engineering, The University of Texas at Austin, Austin, 78712TexasUnited States
| | - Fikret Aydin
- Materials Science Division, Physical and Life Science Directorate, Lawrence Livermore National Laboratory, Livermore, California94550, United States
| | - Martin Z Bazant
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts02139, United States
- Department of Mathematics, Massachusetts Institute of Technology, Cambridge, Massachusetts02139, United States
| | - Daniel Blankschtein
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts02139, United States
| | - Alexandra H Brozena
- Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland20742, United States
| | - J Pedro de Souza
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts02139, United States
| | - Menachem Elimelech
- Department of Chemical and Environmental Engineering, Yale University, New Haven, Connecticut06520-8286, United States
| | - Samuel Faucher
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts02139, United States
| | - John T Fourkas
- Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland20742, United States
- Institute for Physical Science and Technology, University of Maryland, College Park, Maryland20742, United States
- Maryland NanoCenter, University of Maryland, College Park, Maryland20742, United States
| | - Volodymyr B Koman
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts02139, United States
| | - Matthias Kuehne
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts02139, United States
| | - Heather J Kulik
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts02139, United States
| | - Hao-Kun Li
- Department of Mechanical Engineering, Stanford University, Stanford, California94305, United States
| | - Yuhao Li
- Materials Science Division, Physical and Life Science Directorate, Lawrence Livermore National Laboratory, Livermore, California94550, United States
| | - Zhongwu Li
- Materials Science Division, Physical and Life Science Directorate, Lawrence Livermore National Laboratory, Livermore, California94550, United States
| | - Arun Majumdar
- Department of Mechanical Engineering, Stanford University, Stanford, California94305, United States
| | - Joel Martis
- Department of Mechanical Engineering, Stanford University, Stanford, California94305, United States
| | - Rahul Prasanna Misra
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts02139, United States
| | - Aleksandr Noy
- Materials Science Division, Physical and Life Science Directorate, Lawrence Livermore National Laboratory, Livermore, California94550, United States
- School of Natural Sciences, University of California Merced, Merced, California95344, United States
| | - Tuan Anh Pham
- Materials Science Division, Physical and Life Science Directorate, Lawrence Livermore National Laboratory, Livermore, California94550, United States
| | - Haoran Qu
- Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland20742, United States
| | - Archith Rayabharam
- Oden Institute for Computational Engineering and Sciences, Walker Department of Mechanical Engineering, The University of Texas at Austin, Austin, 78712TexasUnited States
| | - Mark A Reed
- Department of Electrical Engineering, Yale University, 15 Prospect Street, New Haven, Connecticut06520, United States
| | - Cody L Ritt
- Department of Chemical and Environmental Engineering, Yale University, New Haven, Connecticut06520-8286, United States
| | - Eric Schwegler
- Materials Science Division, Physical and Life Science Directorate, Lawrence Livermore National Laboratory, Livermore, California94550, United States
| | - Zuzanna Siwy
- Department of Physics and Astronomy, Department of Chemistry, Department of Biomedical Engineering, University of California, Irvine, Irvine92697, United States
| | - Michael S Strano
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts02139, United States
| | - YuHuang Wang
- Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland20742, United States
- Maryland NanoCenter, University of Maryland, College Park, Maryland20742, United States
| | - Yun-Chiao Yao
- Materials Science Division, Physical and Life Science Directorate, Lawrence Livermore National Laboratory, Livermore, California94550, United States
- School of Natural Sciences, University of California Merced, Merced, California95344, United States
| | - Cheng Zhan
- Materials Science Division, Physical and Life Science Directorate, Lawrence Livermore National Laboratory, Livermore, California94550, United States
| | - Ze Zhang
- Department of Mechanical Engineering, Stanford University, Stanford, California94305, United States
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10
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Wang Y, Seki T, Liu X, Yu X, Yu CC, Domke KF, Hunger J, Koper MTM, Chen Y, Nagata Y, Bonn M. Direct Probe of Electrochemical Pseudocapacitive pH Jump at a Graphene Electrode. Angew Chem Int Ed Engl 2023; 62:e202216604. [PMID: 36592114 DOI: 10.1002/anie.202216604] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2022] [Revised: 12/21/2022] [Accepted: 01/02/2023] [Indexed: 01/03/2023]
Abstract
Molecular-level insight into interfacial water at a buried electrode interface is essential in electrochemistry, but spectroscopic probing of the interface remains challenging. Here, using surface-specific heterodyne-detected sum-frequency generation (HD-SFG) spectroscopy, we directly access the interfacial water in contact with the graphene electrode supported on calcium fluoride (CaF2 ). We find phase transition-like variations of the HD-SFG spectra vs. applied potentials, which arises not from the charging/discharging of graphene but from the charging/discharging of the CaF2 substrate through the pseudocapacitive process. The potential-dependent spectra are nearly identical to the pH-dependent spectra, evidencing that the pseudocapacitive behavior is associated with a substantial local pH change induced by water dissociation between the CaF2 and graphene. Our work evidences the local molecular-level effects of pseudocapacitive charging at an electrode/aqueous electrolyte interface.
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Affiliation(s)
- Yongkang Wang
- School of Mechanical Engineering, Southeast University, 211189, Nanjing, China.,Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany
| | - Takakazu Seki
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany
| | - Xuan Liu
- Leiden Institute of Chemistry, Leiden University, Einsteinweg 55, 2333CC, Leiden (The, Netherlands
| | - Xiaoqing Yu
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany
| | - Chun-Chieh Yu
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany
| | - Katrin F Domke
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany.,University Duisburg-Essen, Faculty of Chemistry, Universitätsstraße 5, 45141, Essen, Germany
| | - Johannes Hunger
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany
| | - Marc T M Koper
- Leiden Institute of Chemistry, Leiden University, Einsteinweg 55, 2333CC, Leiden (The, Netherlands
| | - Yunfei Chen
- School of Mechanical Engineering, Southeast University, 211189, Nanjing, China
| | - Yuki Nagata
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany
| | - Mischa Bonn
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany
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11
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Carpenter J, Kim H, Suarez J, van der Zande A, Miljkovic N. The Surface Energy of Hydrogenated and Fluorinated Graphene. ACS APPLIED MATERIALS & INTERFACES 2023; 15:2429-2436. [PMID: 36563177 DOI: 10.1021/acsami.2c18329] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
The surface energy of graphene and its chemical derivatives governs fundamental interfacial interactions like molecular assembly, wetting, and doping. However, quantifying the surface energy of supported two-dimensional (2D) materials, such as graphene, is difficult because (1) they are so thin that electrostatic interactions emanating from the underlying substrate are not completely screened, (2) the contribution from the monolayer is sensitive to its exact chemical state, and (3) the adsorption of airborne contaminants, as well as contaminants introduced during transfer processing, screens the electrostatic interactions from the monolayer and underlying substrate, changing the determined surface energy. Here, we determine the polar and dispersive surface energy of bare, fluorinated, and hydrogenated graphene through contact angle measurements with water and diiodomethane. We accounted for many contributing factors, including substrate surface energies and combating adsorption of airborne contaminants. Hydrogenating graphene raises its polar surface energy with little effect on its dispersive surface energy. Fluorinating graphene lowers its dispersive surface energy with a substrate-dependent effect on its polar surface energy. These results unravel how changing the chemical structure of graphene modifies its surface energy, with applications for hybrid nanomaterials, bioadhesion, biosensing, and thin-film assembly.
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Affiliation(s)
- James Carpenter
- Department of Mechanical Science and Engineering, University of Illinois, Urbana, Illinois 61801, United States
| | - Hyunchul Kim
- Department of Mechanical Science and Engineering, University of Illinois, Urbana, Illinois 61801, United States
| | - Jules Suarez
- Department of Mechanical Science and Engineering, University of Illinois, Urbana, Illinois 61801, United States
| | - Arend van der Zande
- Department of Mechanical Science and Engineering, University of Illinois, Urbana, Illinois 61801, United States
- Materials Research Laboratory, University of Illinois, Urbana, Illinois 61801, United States
| | - Nenad Miljkovic
- Department of Mechanical Science and Engineering, University of Illinois, Urbana, Illinois 61801, United States
- Materials Research Laboratory, University of Illinois, Urbana, Illinois 61801, United States
- Department of Electrical and Computer Engineering, University of Illinois, Urbana, Illinois 61801, United States
- International Institute for Carbon Neutral Energy Research (WPI-I2CNER), Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
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12
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Garcia R. Interfacial Liquid Water on Graphite, Graphene, and 2D Materials. ACS NANO 2023; 17:51-69. [PMID: 36507725 PMCID: PMC10664075 DOI: 10.1021/acsnano.2c10215] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/14/2022] [Accepted: 12/08/2022] [Indexed: 06/17/2023]
Abstract
The optical, electronic, and mechanical properties of graphite, few-layer, and two-dimensional (2D) materials have prompted a considerable number of applications. Biosensing, energy storage, and water desalination illustrate applications that require a molecular-scale understanding of the interfacial water structure on 2D materials. This review introduces the most recent experimental and theoretical advances on the structure of interfacial liquid water on graphite-like and 2D materials surfaces. On pristine conditions, atomic-scale resolution experiments revealed the existence of 1-3 hydration layers. Those layers were separated by ∼0.3 nm. The experimental data were supported by molecular dynamics simulations. However, under standard working conditions, atomic-scale resolution experiments revealed the presence of 2-3 hydrocarbon layers. Those layers were separated by ∼0.5 nm. Linear alkanes were the dominant molecular specie within the hydrocarbon layers. Paradoxically, the interface of an aged 2D material surface immersed in water does not have water molecules on its vicinity. Free-energy considerations favored the replacement of water by alkanes.
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Affiliation(s)
- Ricardo Garcia
- Instituto de Ciencia de Materiales
de Madrid, CSIC, c/Sor Juana Inés de la Cruz 3, 28049Madrid, Spain
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13
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Ham J, Lim J, Hong S, Lee WC. Spin Coating Promotes the Epitaxial Growth of AgCN Microwires on 2D Materials. ACS NANO 2022; 16:20521-20532. [PMID: 36475627 DOI: 10.1021/acsnano.2c06963] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Epitaxial growth of inorganic crystals on 2D materials is expected to greatly advance nanodevices and nanocomposites. However, because pristine surfaces of 2D materials are chemically inert, it is difficult to grow inorganic crystals epitaxially on 2D materials. Previously, successful results were achieved only by vapor-phase deposition at high temperature, and solution-based deposition including spin coating made the epitaxial growth unaligned, sparse, or nonuniform on 2D materials. Here, we show that solvent-controlled spin coating can uniformly deposit a dense layer of epitaxial AgCN microwires onto various 2D materials. Adding ethanol to an aqueous AgCN solution facilitates uniform formation of the thin supersaturated solution layer during spin coating, which promotes heterogeneous crystal nucleation on 2D material surfaces over homogeneous nucleation in the bulk solution. Microscopic analysis confirms highly aligned, uniform, and dense growth of epitaxial AgCN microwires on graphene, MoS2, hBN, WS2, and WSe2. The epitaxial microwires, which are optically observable and chemically removable, enable crystallographic mapping of grains in millimeter-sized polycrystalline graphene as well as precise control of twist angles (<∼1°) in van der Waals heterostructures. In addition to these practical applications, our study demonstrates the potential of 2D materials as epitaxial templates even in spin coating of inorganic crystals.
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Affiliation(s)
- Jimin Ham
- Department of Mechanical Engineering, BK21FOUR ERICA-ACE Center, Hanyang University, Ansan, Gyeonggi15588, Republic of Korea
| | - Jaemook Lim
- Department of Mechanical Engineering, BK21FOUR ERICA-ACE Center, Hanyang University, Ansan, Gyeonggi15588, Republic of Korea
| | - Sukjoon Hong
- Department of Mechanical Engineering, BK21FOUR ERICA-ACE Center, Hanyang University, Ansan, Gyeonggi15588, Republic of Korea
| | - Won Chul Lee
- Department of Mechanical Engineering, BK21FOUR ERICA-ACE Center, Hanyang University, Ansan, Gyeonggi15588, Republic of Korea
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14
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Liu D, Cao Q, Piao Z, Li L. Confinement Dynamics of Nanodroplets between Two Surfaces: Effects of Wettability and Electric Field. Chemphyschem 2022; 23:e202200184. [PMID: 35986551 DOI: 10.1002/cphc.202200184] [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: 03/21/2022] [Revised: 08/15/2022] [Indexed: 01/04/2023]
Abstract
The electrowetting effect and related applications of tiny droplets have aroused widespread research interest. In this work, we report molecular dynamics simulations of confinement dynamics of nanodroplets under different droplet-surface interactions and surface distances under an external electric field. So far, the effect of the surface-droplet interactions on electric field-induced dynamics behaviors of droplets in confined spaces has not been extensively studied. Our results show that in the absence of electric field there is a critical value of surface wettability for the shape transition of droplets. Above this value, the droplet is divided into small droplets adhered on the bottom and top surfaces; below this value, the droplets are detached from the surfaces. When an external electric field is applied parallel to the surfaces, the droplet spreads on the surface along the direction of the electric field. It was found that the surface separation significantly influences the transition of the droplet shape. The steady morphology of the droplets under the electric field depends on the surface-droplet interaction and surface separation. We explore the underlying mechanism causing the morphological transition through analyzing the molecular interactions, the number of interracial molecules and the interaction force between the droplets and surfaces. These results provide basic insights into the molecular interactions of nanodroplets under different confined environments, and clues for applications of confined nanodroplets under the control of electric field.
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Affiliation(s)
- Dandan Liu
- College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou, 310014, P.R. China.,College of Information Science and Engineering, Jiaxing University, Jiaxing, 314001, P.R. China
| | - Qianqian Cao
- College of Information Science and Engineering, Jiaxing University, Jiaxing, 314001, P.R. China
| | - Zhongyu Piao
- College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou, 310014, P.R. China
| | - Lujuan Li
- College of Information Science and Engineering, Jiaxing University, Jiaxing, 314001, P.R. China
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15
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Cline C, Wang H, Kong J, Li T, Liu J, Wegst UGK. Heterogeneous Ice Nucleation Studied with Single-Layer Graphene. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:15121-15131. [PMID: 36448835 DOI: 10.1021/acs.langmuir.2c02144] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Control of heterogeneous ice nucleation (HIN) is critical for applications that range from iceophobic surfaces to ice-templated materials. HIN on 2D materials is a particular interesting topic that still lacks extensive experimental investigations. Here, we focus on the HIN on single-layer graphene (SLG) transferred onto different substrates, including silicon, silica, and thermal oxide on silicon. Complemented by other samples without SLG, we obtain a large range of wetting contact angles (WCAs) from 2° to 95°. All pristine SLG samples exhibit a large contact angle of ∼95°, which is close to the theoretical value of 96° for free-standing SLG, irrespective of the substrate and even in the presence of nanoscale wrinkles on SLG, which are due to the transfer process, indicating that the topographical features have little impact on the wetting behavior. Interestingly, SLG displays changes in hydrophobicity upon repeated water droplet freezing-melting-drying cycles due to a shift in Fermi level and/or enhanced water-substrate polar molecular interactions, likely induced by residual adsorption of H2O molecules. We found that a 0.04 eV decrease in SLG Fermi level reduces the SLG/water interface energy by ∼6 mJ/m2, thereby making SLG less hydrophobic. Counterintuitively, the reduction in SLG/water interface energy and the enhanced hydrophilicity after repeated freezing-melting-evaporation cycles actually decreases the freezing temperature by ∼3-4 °C, thereby slightly retarding rather than enhancing HIN. We also found that the water droplet freezing temperature differed by only ∼1 °C on different substrates with WCAs from 2° to 95°, an intriguing and yet reasonable result that confirms that wettability alone is not a good indicator of HIN capability. The HIN rate is rather determined by the difference between substrate/water and substrate/ice interface energies, which was found to stay almost constant for substrates weakly interacting with water/ice via van der Waals or hydrogen bonds, irrespective of hydrophilicity.
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Affiliation(s)
- Cory Cline
- Thayer School of Engineering, Dartmouth College, Hanover, New Hampshire 03755, United States
| | - Haozhe Wang
- Department of Materials Science and Engineering, Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Boston, Massachusetts 02139, United States
| | - Jing Kong
- Department of Materials Science and Engineering, Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Boston, Massachusetts 02139, United States
| | - Tianshu Li
- Department of Civil and Environmental Engineering, George Washington University, Washington, D.C. 20052, United States
| | - Jifeng Liu
- Thayer School of Engineering, Dartmouth College, Hanover, New Hampshire 03755, United States
| | - Ulrike G K Wegst
- Thayer School of Engineering, Dartmouth College, Hanover, New Hampshire 03755, United States
- Department of Physics, Northeastern University, Boston, Massachusetts 02115, United States
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16
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Sacchi M, Tamtögl A. Water adsorption and dynamics on graphene and other 2D materials: Computational and experimental advances. ADVANCES IN PHYSICS: X 2022; 8:2134051. [PMID: 36816858 PMCID: PMC7614201 DOI: 10.1080/23746149.2022.2134051] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Revised: 09/26/2022] [Accepted: 09/27/2022] [Indexed: 06/18/2023] Open
Abstract
The interaction of water and surfaces, at molecular level, is of critical importance for understanding processes such as corrosion, friction, catalysis and mass transport. The significant literature on interactions with single crystal metal surfaces should not obscure unknowns in the unique behaviour of ice and the complex relationships between adsorption, diffusion and long-range inter-molecular interactions. Even less is known about the atomic-scale behaviour of water on novel, non-metallic interfaces, in particular on graphene and other 2D materials. In this manuscript, we review recent progress in the characterisation of water adsorption on 2D materials, with a focus on the nano-material graphene and graphitic nanostructures; materials which are of paramount importance for separation technologies, electrochemistry and catalysis, to name a few. The adsorption of water on graphene has also become one of the benchmark systems for modern computational methods, in particular dispersion-corrected density functional theory (DFT). We then review recent experimental and theoretical advances in studying the single-molecular motion of water at surfaces, with a special emphasis on scattering approaches as they allow an unparalleled window of observation to water surface motion, including diffusion, vibration and self-assembly.
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Affiliation(s)
- M. Sacchi
- Department of Chemistry, University of Surrey, Guildford GU2 7XH, UK
| | - A. Tamtögl
- Institute of Experimental Physics, Graz University of Technology, 8010 Graz, Austria
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17
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Li H, Xu Z, Ma C, Ma M. Translucency and negative temperature-dependence for the slip length of water on graphene. NANOSCALE 2022; 14:14636-14644. [PMID: 36165069 DOI: 10.1039/d2nr01481e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Carbonous materials, such as graphene and carbon nanotubes, have attracted tremendous attention in the fields of nanofluidics due to the slip at the interface between solid and liquid. The dependence of slip length for water on the types of supporting substrates and thickness of the carbonous layer, which is critical for applications such as sustainable cooling of electronic devices, remains unknown. In this paper, using colloidal probe atomic force microscopy, we measured the slip length ls of water on graphene supported by hydrophilic and hydrophobic substrates, i.e., SiO2 and octadecyltrimethoxysilane (OTS). The ls on single-layer graphene supported by SiO2 is found to be 1.6 ± 1.9 nm, and that of OTS is 8.5 ± 0.9 nm. When the thickness of few-layer graphene increases to 3-4 layers, both ls values gradually converge to the value of graphite (4.3 ± 3.5 nm). Such a thickness dependence is termed slip length translucency. Further, ls is found to decrease by about 70% when temperature increases from 300 K to 350 K for 2-layer graphene supported by SiO2. These observations are explained by analysis based on the Green-Kubo relation and McLachlan theory. Our results provide the first set of reference values for the slip length of water on supported few-layer graphene. They can not only serve as a direct experimental reference for solid-liquid interaction, but also provide a guideline for the design of nanofluidics-based devices, for example thermo-mechanical nanofluidic devices.
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Affiliation(s)
- Han Li
- Department of Mechanical Engineering, State Key Laboratory of Tribology in Advanced Equipment (SKLT), Tsinghua University, Beijing 100084, China.
- Center for Nano and Micro Mechanics, Tsinghua University, Beijing 100084, China
| | - Zhi Xu
- Department of Mechanical Engineering, State Key Laboratory of Tribology in Advanced Equipment (SKLT), Tsinghua University, Beijing 100084, China.
- Center for Nano and Micro Mechanics, Tsinghua University, Beijing 100084, China
| | - Chen Ma
- Center for Nano and Micro Mechanics, Tsinghua University, Beijing 100084, China
- Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China
| | - Ming Ma
- Department of Mechanical Engineering, State Key Laboratory of Tribology in Advanced Equipment (SKLT), Tsinghua University, Beijing 100084, China.
- Center for Nano and Micro Mechanics, Tsinghua University, Beijing 100084, China
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18
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Ye H, Yin C, Wang J, Zheng Y. Controllable and Gradient Wettability of Bilayer Two-Dimensional Materials Regulated by Interlayer Distance. ACS APPLIED MATERIALS & INTERFACES 2022; 14:41489-41498. [PMID: 36001530 DOI: 10.1021/acsami.2c08282] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Surfaces with controllable and gradient wettability often require an elaborate design of the microstructure or its response under electrical, thermal, optical, pH, and other stimuli. Generally, the wettability change under these physical or chemical effects relies on a complex mechanism that is difficult to be quantitatively described. In this study, an online controlling strategy for surface wettability and the corresponding theoretical model are put forward based on a bilayer graphene-like atomic structure. Molecular dynamics results indicate that the surface wettability varies toward hydrophilicity after sticking a bottom material regardless of its wettability. But such an influence becomes weak with increasing interlayer distance, and the overall wettability approaches that of the upper layer material gradually. This variation is elucidated by the increase of the work of adhesion, providing new insight into the wetting transparency of graphene. A theoretical model of the governing relationship is established based on the work of adhesion, which correlates the overall surface wettability with the interlayer distance and the wettabilities of individual materials. Moreover, a surface with a uniform wettability gradient is achieved by inclining the bottom material. The spontaneous and steady motion of droplets can be induced by this gradient wettability. The relevant speedup behavior is evaluated through a theoretical model considering the varying interlayer distance, which reveals the critical role of the lower layer. This study proposes a novel strategy for controllable wetting and relevant gradient surfaces using prevailing two-dimensional materials, paving new routes to many applications such as microfluidic chips, virus diagnosis, and intelligent sensors.
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Affiliation(s)
- Hongfei Ye
- International Research Center for Computational Mechanics, State Key Laboratory of Structural Analysis for Industrial Equipment, Department of Engineering Mechanics, Faculty of Vehicle Engineering and Mechanics, Dalian University of Technology, Dalian 116024, P. R. China
| | - Chenguang Yin
- International Research Center for Computational Mechanics, State Key Laboratory of Structural Analysis for Industrial Equipment, Department of Engineering Mechanics, Faculty of Vehicle Engineering and Mechanics, Dalian University of Technology, Dalian 116024, P. R. China
| | - Jian Wang
- International Research Center for Computational Mechanics, State Key Laboratory of Structural Analysis for Industrial Equipment, Department of Engineering Mechanics, Faculty of Vehicle Engineering and Mechanics, Dalian University of Technology, Dalian 116024, P. R. China
| | - Yonggang Zheng
- International Research Center for Computational Mechanics, State Key Laboratory of Structural Analysis for Industrial Equipment, Department of Engineering Mechanics, Faculty of Vehicle Engineering and Mechanics, Dalian University of Technology, Dalian 116024, P. R. China
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19
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Abazari M, Mahdavi H. Synthesis and application of MoS2 quantum dots-decorated ZnO nanoparticles for the fabrication of loose nanofiltration membranes with improved filtration, anti-fouling, and photocatalytic performance. Chem Eng Res Des 2022. [DOI: 10.1016/j.cherd.2022.07.026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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20
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Wen Y, Liu Y. Wetting Behavior of Sessile Droplet Affected by Chemical Heterogeneity Size: A Theoretical and Simulative Analysis with Consideration of Contact Line Width. Chem Eng Sci 2022. [DOI: 10.1016/j.ces.2022.117776] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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21
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Pandey M, Kumar R. Polymer curing assisted formation of optically visible sub-micron blisters of multilayer graphene for local strain engineering. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2022; 34:245401. [PMID: 35344935 DOI: 10.1088/1361-648x/ac61b4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2022] [Accepted: 03/28/2022] [Indexed: 06/14/2023]
Abstract
The local or global straining techniques are used to modulate the electronic, vibrational and optical properties of the two-dimensional (2D) materials. However, manipulating the physical properties of a 2D material under a local strain is comparatively more challenging. In this work, we demonstrate an easy and efficient polymer curing assisted technique for the formation of optically visible multilayer graphene (MLG) blisters of different shapes and sizes. The detailed spectroscopic and morphological analyses have been employed for exploring the dynamics of the confined matter inside the sub-micron blisters, which confirms that the confined matter inside the blister is liquid (water). From further analyses, we find the nonlinear elastic plate model as an acceptable model under certain limits for the mechanical analyses of the MLG blisters over the (poly)vinyl alcohol (PVA) polymer film to estimate the MLG-substrate interfacial adhesion energy and confinement pressure inside the blisters. The findings open new pathways for exploiting the technique for the formation of sub-micron blisters of the 2D materials for local strain-engineering applications, as well as the temperature-controlled release of the confined matter.
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Affiliation(s)
- Mukesh Pandey
- T-GraMS Laboratory, Department of Physics, Indian Institute of Technology Ropar, Rupnagar, Punjab - 140001, India
| | - Rakesh Kumar
- T-GraMS Laboratory, Department of Physics, Indian Institute of Technology Ropar, Rupnagar, Punjab - 140001, India
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22
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Escalona Y, Espinoza N, Barria-Urenda M, Oostenbrink C, Garate JA. On the effects of induced polarizability at the water-graphene interface via classical charge-on-spring models. Phys Chem Chem Phys 2022; 24:7748-7758. [PMID: 35294507 DOI: 10.1039/d1cp05573a] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Molecular models of the water-graphene interaction are essential to describe graphene in condensed phases. Different challenges are associated with the generation of these models, in particular π-π and dispersion interactions; thus quantum and classical models have been developed and due to the numerical efficiency of the latter, they have been extensively employed. In this work, we have systematically studied, via molecular dynamics, two polarizable graphene models, denominated CCCP and CCCPD, employing the charge-on-spring model of the GROMOS forcefield, both being compatible with the polarizable water models COS/G2 and COS/D2, respectively. These models were compared with non-polarizable graphene and SPC water models. We focused the study on the water-graphene interface in two distinct systems and under the influence of an electric field: one composed of graphene immersed in water and the other composed of graphene with a water droplet above it. In the former, the orientation of water close to the graphene layer is affected by polarizable graphene in comparison to non-polarizable graphene. This effect is emphasised when an electric field is applied. In the latter, carbon polarizability reduced water contact angles, but graphene retained its hydrophobicity and the computed angles are within the experimental data. Given the significant extra computational cost, the use of polarizable models instead of the traditional fixed-charged approach for the graphene-water interaction may be justified when polarizability effects are relevant, for example, when applying relatively strong fields or in very anisotropic systems, such as the vacuum-bulk interface, as these models are more responsive to such conditions.
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Affiliation(s)
- Yerko Escalona
- Institute for Molecular Modeling and Simulation, University of Natural Resources and Life Sciences, 1190 Vienna, Austria
| | - Nicolas Espinoza
- Centro Interdisciplinario de Neurociencia de Valparaíso (CINV), Universidad de Valparaíso, Pasaje Harrington 287, Valparaíso, Chile. .,Millennium Nucleus in NanoBioPhysics (NNBP), Universidad de Valparaíso, Pasaje Harrington 287, Valparaíso, Chile
| | - Mateo Barria-Urenda
- Centro Interdisciplinario de Neurociencia de Valparaíso (CINV), Universidad de Valparaíso, Pasaje Harrington 287, Valparaíso, Chile. .,Millennium Nucleus in NanoBioPhysics (NNBP), Universidad de Valparaíso, Pasaje Harrington 287, Valparaíso, Chile
| | - Chris Oostenbrink
- Institute for Molecular Modeling and Simulation, University of Natural Resources and Life Sciences, 1190 Vienna, Austria
| | - Jose Antonio Garate
- Centro Interdisciplinario de Neurociencia de Valparaíso (CINV), Universidad de Valparaíso, Pasaje Harrington 287, Valparaíso, Chile. .,Millennium Nucleus in NanoBioPhysics (NNBP), Universidad de Valparaíso, Pasaje Harrington 287, Valparaíso, Chile
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23
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Non-covalent interactions of graphene surface: Mechanisms and applications. Chem 2022. [DOI: 10.1016/j.chempr.2021.12.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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24
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25
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Abstract
The thermodynamic stability of water next to graphitic surfaces is of fundamental interest, as it underlies several natural phenomena and important industrial processes. It is commonly assumed that water wets graphite more than graphene due to increased, favorable van der Waals interactions between the interfacial water molecules with multiple carbon sheets. Here, we employed extensive computer simulations and analysis of the molecular correlation functions to show that the interfacial water thermodynamics is in fact dominated by surface entropy. We show that on graphite, destabilization of the interfacial hydrogen bond network leads to an overcompensating increase in population of low frequency translational and librational modes, which is ultimately responsible for the increased interfacial stability compared to graphene. The spectroscopic signature of this effect is an enhancement of the modes near 100 and 300 cm-1. This subtle interplay between entropy and surface binding may have important consideration for interpretations of various phenomena, including the hydrophobic effect.
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Affiliation(s)
- Tod A Pascal
- ATLAS Materials Physics Laboratory, Department of NanoEngineering and Chemical Engineering, University of California San Diego, La Jolla, California 92093, United States
- Materials Science and Engineering, University of California San Diego, La Jolla, California 92093, United States
| | - William A Goddard
- Materials and Process Simulation Center, California Institute of Technology, Pasadena, California 91125, United States
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26
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Kim D, Kim E, Park S, Kim S, Min BK, Yoon HJ, Kwak K, Cho M. Wettability of graphene and interfacial water structure. Chem 2021. [DOI: 10.1016/j.chempr.2021.03.006] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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27
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Tamtögl A, Bahn E, Sacchi M, Zhu J, Ward DJ, Jardine AP, Jenkins SJ, Fouquet P, Ellis J, Allison W. Motion of water monomers reveals a kinetic barrier to ice nucleation on graphene. Nat Commun 2021; 12:3120. [PMID: 34035257 PMCID: PMC8149658 DOI: 10.1038/s41467-021-23226-5] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2020] [Accepted: 04/16/2021] [Indexed: 02/04/2023] Open
Abstract
The interfacial behaviour of water remains a central question to fields as diverse as protein folding, friction and ice formation. While the properties of water at interfaces differ from those in the bulk, major gaps in our knowledge limit our understanding at the molecular level. Information concerning the microscopic motion of water comes mostly from computation and, on an atomic scale, is largely unexplored by experiment. Here, we provide a detailed insight into the behaviour of water monomers on a graphene surface. The motion displays remarkably strong signatures of cooperative behaviour due to repulsive forces between the monomers, enhancing the monomer lifetime ( ≈ 3 s at 125 K) in a free-gas phase that precedes the nucleation of ice islands and, in turn, provides the opportunity for our experiments to be performed. Our results give a molecular perspective on a kinetic barrier to ice nucleation, providing routes to understand and control the processes involved in ice formation.
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Affiliation(s)
- Anton Tamtögl
- Cavendish Laboratory, University of Cambridge, Cambridge, UK.
- Institute of Experimental Physics, Graz University of Technology, Graz, Austria.
| | - Emanuel Bahn
- Cavendish Laboratory, University of Cambridge, Cambridge, UK
- Department of Radiation Oncology, Heidelberg University Hospital, Heidelberg, Germany
| | - Marco Sacchi
- Yusuf Hamied Department of Chemistry, University of Cambridge, Cambridge, UK.
- Department of Chemistry, University of Surrey, Guildford, UK.
| | - Jianding Zhu
- Cavendish Laboratory, University of Cambridge, Cambridge, UK
| | - David J Ward
- Cavendish Laboratory, University of Cambridge, Cambridge, UK
| | | | - Stephen J Jenkins
- Yusuf Hamied Department of Chemistry, University of Cambridge, Cambridge, UK
| | | | - John Ellis
- Cavendish Laboratory, University of Cambridge, Cambridge, UK
| | - William Allison
- Cavendish Laboratory, University of Cambridge, Cambridge, UK
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28
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Gaire B, Singla S, Dhinojwala A. Screening of hydrogen bonding interactions by a single layer graphene. NANOSCALE 2021; 13:8098-8106. [PMID: 33956918 DOI: 10.1039/d0nr08843a] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
A single layer of graphene when transferred to a solid substrate has the ability to screen or transmit interactions from the underlying substrate, which has direct consequences in applications of this 2D material to flexible electronics and sensors. Previous reports using a multitude of techniques present contradictory views on graphene's ability to screen or transmit van der Waals (vdW) and polar interactions. In the present study, we use interface-sensitive spectroscopy to demonstrate that a single layer graphene is opaque to hydrogen bonding interactions (a subset of acid-base interactions), answering a question that has remained unresolved for a decade. Similar frequency shifts of sapphire hydroxyl (OH) peak for graphene-coated sapphire in contact with air and polydimethylsiloxane (PDMS) demonstrate the insensitivity of sapphire OH to PDMS. The screening ability of graphene is also evident in the smaller magnitude of this frequency shift for graphene-coated sapphire in comparison to that for bare sapphire. The screening of acid-base interactions by a single layer graphene results in the significant reduction of adhesion hysteresis for PDMS lens on graphene-coated substrates (sapphire and silicon wafer, SiO2/Si) than bare substrates. Our results have implications in the use of PDMS stamps to transfer graphene to other substrates eliminating the need for a wet-transfer process.
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Affiliation(s)
- Babu Gaire
- School of Polymer Science and Polymer Engineering, University of Akron, Akron, OH 44325, USA.
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29
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Belyaeva L, Tang C, Juurlink L, Schneider GF. Macroscopic and Microscopic Wettability of Graphene. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:4049-4055. [PMID: 33651625 PMCID: PMC8047800 DOI: 10.1021/acs.langmuir.0c02817] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/25/2020] [Revised: 02/17/2021] [Indexed: 06/12/2023]
Abstract
Interactions between water and graphene can be probed on a macroscopic level through wettability by measuring the water contact angle and on a microscopic level through water desorption kinetic studies using surface science methods. The contact angle studies of graphene pinpointed the critical role of sample preparation and measurement conditions in assessing the wettability of graphene. So far, studies of water desorption from graphene under the conditions of ultrahigh vacuum provided superior control over the environment but disregarded the importance of sample preparation. Here, we systematically examined the effect of the morphology of the growth substrate and of the transfer process on the macroscopic and microscopic wettability of graphene. Remarkably, the macroscopic wetting transparency of graphene does not always translate into microscopic wetting transparency, particularly in the case of an atomically defined Cu(111) substrate. Additionally, subtle differences in the type of substrates significantly alter the interactions between graphene and the first monolayer of adsorbed water but have a negligible effect on the apparent macroscopic wettability. This work looks into the correlations between the wetting properties of graphene, both on the macroscopic and microscopic scales, and highlights the importance of sample preparation in understanding the surface chemistry of graphene.
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30
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Lin H, Cojal González JD, Severin N, Sokolov IM, Rabe JP. Reversible Switching of Charge Transfer at the Graphene-Mica Interface with Intercalating Molecules. ACS NANO 2020; 14:11594-11604. [PMID: 32865956 DOI: 10.1021/acsnano.0c04144] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Understanding and controlling charge transfer through molecular nanostructures at interfaces is of paramount importance, particularly for electronic devices but also for contact electrification or in bioelectronics. We investigate the influence of intercalation and exchange of molecularly thin layers of small molecules (water, ethanol, 2-propanol, and acetone) on charge transfer at the well-defined interface between an insulator (muscovite mica) and a conductor (graphene). Raman spectroscopy is used to probe the charge carriers in graphene. While a molecular layer of water blocks charge transfer between mica and graphene, a layer of the organic molecules allows for it. The exchange of molecular water layers with ethanol layers switches the charge transfer very efficiently from off to on and back. We propose a charge transfer model between occupied mica trap states and electronic states of graphene, offset by the electrostatic potentials produced by the molecular dipole layers, as supported by molecular dynamics simulations. Our work demonstrates how intercalation of molecules of volatile liquids can reversibly affect charge transfer at interfaces. This implies its strong impact on the function of hybrid inorganic-organic electronic devices in different ambients and potential applications, including sensors and actuators.
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Affiliation(s)
- Hu Lin
- Department of Physics & IRIS Adlershof, Humboldt-Universität zu Berlin, Newtonstraße 15, 12489 Berlin, Germany
| | - José D Cojal González
- Department of Physics & IRIS Adlershof, Humboldt-Universität zu Berlin, Newtonstraße 15, 12489 Berlin, Germany
| | - Nikolai Severin
- Department of Physics & IRIS Adlershof, Humboldt-Universität zu Berlin, Newtonstraße 15, 12489 Berlin, Germany
| | - Igor M Sokolov
- Department of Physics & IRIS Adlershof, Humboldt-Universität zu Berlin, Newtonstraße 15, 12489 Berlin, Germany
| | - Jürgen P Rabe
- Department of Physics & IRIS Adlershof, Humboldt-Universität zu Berlin, Newtonstraße 15, 12489 Berlin, Germany
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31
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Gopalan AI, Lee JC, Saianand G, Lee KP, Sonar P, Dharmarajan R, Hou YL, Ann KY, Kannan V, Kim WJ. Recent Progress in the Abatement of Hazardous Pollutants Using Photocatalytic TiO 2-Based Building Materials. NANOMATERIALS (BASEL, SWITZERLAND) 2020; 10:E1854. [PMID: 32948034 PMCID: PMC7559443 DOI: 10.3390/nano10091854] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Revised: 09/08/2020] [Accepted: 09/11/2020] [Indexed: 01/01/2023]
Abstract
Titanium dioxide (TiO2) has been extensively investigated in interdisciplinary research (such as catalysis, energy, environment, health, etc.) owing to its attractive physico-chemical properties, abundant nature, chemical/environmental stability, low-cost manufacturing, low toxicity, etc. Over time, TiO2-incorporated building/construction materials have been utilized for mitigating potential problems related to the environment and human health issues. However, there are challenges with regards to photocatalytic efficiency improvements, lab to industrial scaling up, and commercial product production. Several innovative approaches/strategies have been evolved towards TiO2 modification with the focus of improving its photocatalytic efficiency. Taking these aspects into consideration, research has focused on the utilization of many of these advanced TiO2 materials towards the development of construction materials such as concrete, mortar, pavements, paints, etc. This topical review focuses explicitly on capturing and highlighting research advancements in the last five years (mainly) (2014-2019) on the utilization of various modified TiO2 materials for the development of practical photocatalytic building materials (PBM). We briefly summarize the prospective applications of TiO2-based building materials (cement, mortar, concretes, paints, coating, etc.) with relevance to the removal of outdoor/indoor NOx and volatile organic compounds, self-cleaning of the surfaces, etc. As a concluding remark, we outline the challenges and make recommendations for the future outlook of further investigations and developments in this prosperous area.
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Affiliation(s)
- Anantha-Iyengar Gopalan
- Daegyeong Regional Infrastructure Technology Development Center, Kyungpook National University, Daegu 41566, Korea; (A.-I.G.); (K.-P.L.)
| | - Jun-Cheol Lee
- Department of Architecture, Seowon University, Cheongju 28674, Korea;
| | - Gopalan Saianand
- Global Centre for Environmental Remediation (GCER), Faculty of Science, The University of Newcastle, Callaghan, New South Wales 2308, Australia; (G.S.); (R.D.)
| | - Kwang-Pill Lee
- Daegyeong Regional Infrastructure Technology Development Center, Kyungpook National University, Daegu 41566, Korea; (A.-I.G.); (K.-P.L.)
| | - Prashant Sonar
- School of Chemistry and Physics, Queensland University of Technology, 2 George Street, Brisbane, QLD 4001, Australia;
- Centre for Material Science, Queensland University of Technology, 2 George Street, Brisbane, QLD 4001, Australia
| | - Rajarathnam Dharmarajan
- Global Centre for Environmental Remediation (GCER), Faculty of Science, The University of Newcastle, Callaghan, New South Wales 2308, Australia; (G.S.); (R.D.)
| | - Yao-long Hou
- Department of Civil Engineering, Kyungpook National University, 80 Daehakro, Buk-gu, Daegu 41566, Korea;
| | - Ki-Yong Ann
- Department of Civil and Environmental Engineering, Hanyang University, Ansan 1588, Korea;
| | | | - Wha-Jung Kim
- Daegyeong Regional Infrastructure Technology Development Center, Kyungpook National University, Daegu 41566, Korea; (A.-I.G.); (K.-P.L.)
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Chen Q, Yin Y, Ren F, Liang M, Yi X, Liu Z. Van der Waals Epitaxy of III-Nitrides and Its Applications. MATERIALS 2020; 13:ma13173835. [PMID: 32878046 PMCID: PMC7503271 DOI: 10.3390/ma13173835] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Revised: 08/22/2020] [Accepted: 08/25/2020] [Indexed: 12/03/2022]
Abstract
III-nitride semiconductors have wide bandgap and high carrier mobility, making them suitable candidates for light-emitting diodes (LEDs), laser diodes (LDs), high electron mobility transistors (HEMTs) and other optoelectronics. Compared with conventional epitaxy technique, van der Waals epitaxy (vdWE) has been proven to be a useful route to relax the requirements of lattice mismatch and thermal mismatch between the nitride epilayers and the substrates. By using vdWE, the stress in the epilayer can be sufficiently relaxed, and the epilayer can be easily exfoliated and transferred, which provides opportunities for novel device design and fabrication. In this paper, we review and discuss the important progress on the researches of nitrides vdWE. The potential applications of nitride vdWE are also prospected.
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Affiliation(s)
- Qi Chen
- Research and Development Center for Solid State Lighting, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China; (Q.C.); (Y.Y.); (F.R.); (M.L.)
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
- Beijing Engineering Research Center for the 3rd Generation Semiconductor Materials and Application, Beijing 100083, China
| | - Yue Yin
- Research and Development Center for Solid State Lighting, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China; (Q.C.); (Y.Y.); (F.R.); (M.L.)
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
- Beijing Engineering Research Center for the 3rd Generation Semiconductor Materials and Application, Beijing 100083, China
| | - Fang Ren
- Research and Development Center for Solid State Lighting, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China; (Q.C.); (Y.Y.); (F.R.); (M.L.)
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
- Beijing Engineering Research Center for the 3rd Generation Semiconductor Materials and Application, Beijing 100083, China
| | - Meng Liang
- Research and Development Center for Solid State Lighting, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China; (Q.C.); (Y.Y.); (F.R.); (M.L.)
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
- Beijing Engineering Research Center for the 3rd Generation Semiconductor Materials and Application, Beijing 100083, China
| | - Xiaoyan Yi
- Research and Development Center for Solid State Lighting, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China; (Q.C.); (Y.Y.); (F.R.); (M.L.)
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
- Beijing Engineering Research Center for the 3rd Generation Semiconductor Materials and Application, Beijing 100083, China
- Correspondence: (X.Y.); (Z.L.); Tel.: +86-010-8230-5423 (Z.L.)
| | - Zhiqiang Liu
- Research and Development Center for Solid State Lighting, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China; (Q.C.); (Y.Y.); (F.R.); (M.L.)
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
- Beijing Engineering Research Center for the 3rd Generation Semiconductor Materials and Application, Beijing 100083, China
- Correspondence: (X.Y.); (Z.L.); Tel.: +86-010-8230-5423 (Z.L.)
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Wagemann E, Wang Y, Das S, Mitra SK. On the wetting translucency of hexagonal boron nitride. Phys Chem Chem Phys 2020; 22:7710-7718. [DOI: 10.1039/d0cp00200c] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
When a drop sits on an atomically thin coating supported by a hydrophilic material, it is possible that the underlying substrate influences the equilibrium contact angle. Such behavior is known as the wetting translucency effect.
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Affiliation(s)
- Enrique Wagemann
- Micro & Nano-Scale Transport Laboratory
- Waterloo Institute for Nanotechnology
- Department of Mechanical and Mechatronics Engineering
- University of Waterloo
- Waterloo
| | - Yanbin Wang
- Department of Mechanical Engineering
- University of Maryland
- College Park
- USA
| | - Siddhartha Das
- Department of Mechanical Engineering
- University of Maryland
- College Park
- USA
| | - Sushanta K. Mitra
- Micro & Nano-Scale Transport Laboratory
- Waterloo Institute for Nanotechnology
- Department of Mechanical and Mechatronics Engineering
- University of Waterloo
- Waterloo
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34
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Kim IH, Im TH, Lee HE, Jang JS, Wang HS, Lee GY, Kim ID, Lee KJ, Kim SO. Janus Graphene Liquid Crystalline Fiber with Tunable Properties Enabled by Ultrafast Flash Reduction. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2019; 15:e1901529. [PMID: 31259486 DOI: 10.1002/smll.201901529] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2019] [Revised: 06/10/2019] [Indexed: 05/23/2023]
Abstract
Flash photothermal treatment via Xenon lamp with a broad wavelength spectrum can effectively remove oxygen functionalities and restore sp2 domains at graphitic carbon materials. The chemical composition and relevant structure formation of flash reduced graphene oxide liquid crystal (GOLC) fibers are investigated in accordance with flash irradiation conditions. Owing to the spatial controllability of reduction level via anisotropic flash irradiation, the mechanical properties and electrical conductivity of graphene fibers can be delicately counterbalanced to attain desired properties. High sensitivity humidity sensors can be fabricated from the flash reduced fibers demonstrating notably higher sensitivity over the thermally reduced counterparts. This ultrafast flash reduction holds great promise for multidimensional macroscopic GO based structures, enabling a wide range of potential applications, including textile electronics and wearable sensors.
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Affiliation(s)
- In Ho Kim
- National Creative Research Initiative Center for Multi-Dimensional Directed Nanoscale Assembly, Department of Materials Science & Engineering, KAIST Institute for Nanocentury, KAIST, 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea
| | - Tae Hong Im
- Department of Materials Science & Engineering, KAIST Institute for Nanocentury, KAIST, 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea
| | - Han Eol Lee
- Department of Materials Science & Engineering, KAIST Institute for Nanocentury, KAIST, 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea
| | - Ji-Soo Jang
- Department of Materials Science & Engineering, KAIST Institute for Nanocentury, KAIST, 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea
| | - Hee Seung Wang
- Department of Materials Science & Engineering, KAIST Institute for Nanocentury, KAIST, 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea
| | - Gil Yong Lee
- National Creative Research Initiative Center for Multi-Dimensional Directed Nanoscale Assembly, Department of Materials Science & Engineering, KAIST Institute for Nanocentury, KAIST, 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea
| | - Il-Doo Kim
- Department of Materials Science & Engineering, KAIST Institute for Nanocentury, KAIST, 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea
| | - Keon Jae Lee
- Department of Materials Science & Engineering, KAIST Institute for Nanocentury, KAIST, 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea
| | - Sang Ouk Kim
- National Creative Research Initiative Center for Multi-Dimensional Directed Nanoscale Assembly, Department of Materials Science & Engineering, KAIST Institute for Nanocentury, KAIST, 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea
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35
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Presel F, Gijón A, Hernández ER, Lacovig P, Lizzit S, Alfè D, Baraldi A. Translucency of Graphene to van der Waals Forces Applies to Atoms/Molecules with Different Polar Character. ACS NANO 2019; 13:12230-12241. [PMID: 31589408 DOI: 10.1021/acsnano.9b07277] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Graphene has been proposed to be either fully transparent to van der Waals interactions to the extent of allowing switching between hydrophobic and hydrophilic behavior, or partially transparent (translucent), yet there has been considerable debate on this topic, which is still ongoing. In a combined experimental and theoretical study we investigate the effects of different metal substrates on the adsorption energy of atomic (argon) and molecular (carbon monoxide) adsorbates on high-quality epitaxial graphene. We demonstrate that while the adsorption energy is certainly affected by the chemical composition of the supporting substrate and by the corrugation of the carbon lattice, the van der Waals interactions between adsorbates and the metal surfaces are partially screened by graphene. Our results indicate that the concept of graphene translucency, already introduced in the case of water droplets, is found to hold more generally also in the case of single polar molecules and atoms, which are apolar.
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Affiliation(s)
- Francesco Presel
- Physics Department , University of Trieste , Via Valerio 2 , 34127 Trieste , Italy
| | - Alfonso Gijón
- Instituto de Ciencia de Materiales de Madrid - ICMM-CSIC) , Campus de Cantoblanco , 28049 Madrid , Spain
| | - Eduardo R Hernández
- Instituto de Ciencia de Materiales de Madrid - ICMM-CSIC) , Campus de Cantoblanco , 28049 Madrid , Spain
| | - Paolo Lacovig
- Elettra-Sincrotrone Trieste S.C.p.A. , Strada Statale 14 Km 163.5 , 34149 Trieste , Italy
| | - Silvano Lizzit
- Elettra-Sincrotrone Trieste S.C.p.A. , Strada Statale 14 Km 163.5 , 34149 Trieste , Italy
| | - Dario Alfè
- Department of Earth Sciences, Department of Physics and Astronomy , TYC@UCL , London WC1E 6BT , United Kingdom
- London Centre for Nanotechnology , University College London , Gower Street , London WC1E 6BT , United Kingdom
- Dipartimento di Fisica Ettore Pancini , Università di Napoli Federico II , Monte S. Angelo, 80126 Napoli , Italy
| | - Alessandro Baraldi
- Physics Department , University of Trieste , Via Valerio 2 , 34127 Trieste , Italy
- Elettra-Sincrotrone Trieste S.C.p.A. , Strada Statale 14 Km 163.5 , 34149 Trieste , Italy
- IOM-CNR , Laboratorio TASC , AREA Science Park, S.S. 14 km 163.5 , 34149 Trieste , Italy
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36
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Ghoshal D, Jain R, Koratkar NA. Graphene's Partial Transparency to van der Waals and Electrostatic Interactions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:12306-12316. [PMID: 31474110 DOI: 10.1021/acs.langmuir.9b01887] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Graphene is the thinnest known two-dimensional (2D) material. This thinness is responsible for graphene's well-known optical transparency. In addition to being transparent to light, its extreme thinness and nonpolar nature also render graphene partially transparent to van der Waals and electrostatic interactions. This enables media present on opposite sides of a graphene sheet to sense or feel each other and be influenced by each other. Such crosstalk between materials separated by an impermeable barrier is impossible for typical barrier or coating materials that are usually thick enough to completely screen out such interactions. In this article, we review graphene's partial transparency to atomic interactions at the liquid-solid, solid-solid, and liquid-liquid interfaces. We compare graphene with other 2D materials such as hexagonal boron nitride and show that the extent of graphene's transparency is strongly dependent on the nature and interaction range of the materials placed on opposite sides of the graphene layer. We end with recommendations for future research to better understand the underlying science and to develop practical applications of this exciting phenomena.
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37
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Efficient Production of Multi-Layer Graphene from Graphite Flakes in Water by Lipase-Graphene Sheets Conjugation. NANOMATERIALS 2019; 9:nano9091344. [PMID: 31546926 PMCID: PMC6781021 DOI: 10.3390/nano9091344] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/05/2019] [Revised: 09/17/2019] [Accepted: 09/18/2019] [Indexed: 11/26/2022]
Abstract
Biographene was successfully produced in water from graphite flakes by a simple, rapid, and efficient methodology based on a bioexfoliation technology. The methodology consisted in the application of a lipase, with a unique mechanism of interaction with hydrophobic surfaces, combined with a previous mechanical sonication, to selectively generate lipase-graphene sheets conjugates in water at room temperature. The adsorption of the lipase on the graphene sheets permits to keep the sheets separated in comparison with other methods. It was possible to obtain more than 80% of graphene (in the form of multi-layer graphene) from low-cost graphite and with less damage compared to commercial graphene oxide (GO) or reduced GO. Experimental analysis demonstrated the formation of multi-layer graphene (MLG) mainly using lipase from Thermomyces Lanuginosus (TLL).
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38
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Kwon SS, Choi J, Heiranian M, Kim Y, Chang WJ, Knapp PM, Wang MC, Kim JM, Aluru NR, Park WI, Nam S. Electrical Double Layer of Supported Atomically Thin Materials. NANO LETTERS 2019; 19:4588-4593. [PMID: 31203634 DOI: 10.1021/acs.nanolett.9b01563] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The electrical double layer (EDL), consisting of two parallel layers of opposite charges, is foundational to many interfacial phenomena and unique in atomically thin materials. An important but unanswered question is how the "transparency" of atomically thin materials to their substrates influences the formation of the EDL. Here, we report that the EDL of graphene is directly affected by the surface energy of the underlying substrates. Cyclic voltammetry and electrochemical impedance spectroscopy measurements demonstrate that graphene on hydrophobic substrates exhibits an anomalously low EDL capacitance, much lower than what was previously measured for highly oriented pyrolytic graphite, suggesting disturbance of the EDL ("disordered EDL") formation due to the substrate-induced hydrophobicity to graphene. Similarly, electrostatic gating using EDL of graphene field-effect transistors shows much lower transconductance levels or even no gating for graphene on hydrophobic substrates, further supporting our hypothesis. Molecular dynamics simulations show that the EDL structure of graphene on a hydrophobic substrate is disordered, caused by the disruption of water dipole assemblies. Our study advances understanding of EDL in atomically thin limit.
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Affiliation(s)
- Sun Sang Kwon
- Division of Materials Science and Engineering , Hanyang University , Seoul 04763 , Korea
| | - Jonghyun Choi
- Department of Mechanical Science and Engineering , University of Illinois at Urbana-Champaign , Urbana , Illinois 61801 , United States
| | - Mohammad Heiranian
- Department of Mechanical Science and Engineering , University of Illinois at Urbana-Champaign , Urbana , Illinois 61801 , United States
| | - Yerim Kim
- Department of Mechanical Science and Engineering , University of Illinois at Urbana-Champaign , Urbana , Illinois 61801 , United States
| | - Won Jun Chang
- Division of Materials Science and Engineering , Hanyang University , Seoul 04763 , Korea
| | - Peter M Knapp
- Department of Mechanical Science and Engineering , University of Illinois at Urbana-Champaign , Urbana , Illinois 61801 , United States
| | - Michael Cai Wang
- Department of Mechanical Science and Engineering , University of Illinois at Urbana-Champaign , Urbana , Illinois 61801 , United States
| | - Jin Myung Kim
- Department of Materials Science and Engineering , University of Illinois at Urbana-Champaign , Urbana , Illinois 61801 , United States
| | - Narayana R Aluru
- Department of Mechanical Science and Engineering , University of Illinois at Urbana-Champaign , Urbana , Illinois 61801 , United States
| | - Won Il Park
- Division of Materials Science and Engineering , Hanyang University , Seoul 04763 , Korea
| | - SungWoo Nam
- Department of Mechanical Science and Engineering , University of Illinois at Urbana-Champaign , Urbana , Illinois 61801 , United States
- Department of Materials Science and Engineering , University of Illinois at Urbana-Champaign , Urbana , Illinois 61801 , United States
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39
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Yadav N, Kallur V, Chakraborty D, Johari P, Lochab B. Control of Functionalities in GO: Effect of Bronsted Acids as Supported by Ab Initio Simulations and Experiments. ACS OMEGA 2019; 4:9407-9418. [PMID: 31460031 PMCID: PMC6648546 DOI: 10.1021/acsomega.9b00676] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/11/2019] [Accepted: 05/16/2019] [Indexed: 06/10/2023]
Abstract
Graphene oxide (GO) is an attractive precursor for graphene, provided by the well-known wet-chemical oxidative process. The intercalation of acid in graphite is considered as a crucial step, and its subsequent oxidation holds special relevance in synthesis. So far, the above chemistry is dominated by usage of H2SO4. Recently, H3PO4 appeared as a suitable intercalant for graphite. However, its role is not well understood in the formation of GO, especially when present as a co-acid with H2SO4. Additionally, a relatively lower toxicity of H3PO4 as compared to H2SO4, elimination of toxic NaNO3 usage, and a facile purification protocol are encouraging in terms of low-cost production of GO with a reduced environmental impact. Here, we report the systematic synthesis and characterization of GOs prepared with the variation in the ratio of H2SO4 and H3PO4. Ab initio simulations revealed that intercalation is primarily affected because of the usage of a mixture of co-acids. Interestingly, the ratio of the acids dictated the nature of the functionalities, extent of the defects, and morphology of the GOs, accounting for a pronounced effect on thermal stability, contact angle, zeta potential, and hydrodynamic size. The oxidation mechanism showed a predominance of H2SO4 content, whereas H3PO4 is found to mainly govern the intercalation of graphite, thereby affecting the acid-based intercalation-oxidation chemistry of graphite. The as-prepared GO suspension exhibited a high adsorption capacity for methylene blue dye removal in water, suggesting its potential as an adsorbent material in water treatment. The utility of the two acids affects the acid-based intercalation-oxidation chemistry of graphite and simultaneously may open up new opportunities for synthesized GOs, on tenets of green chemistry, in a wide arena of applications.
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Affiliation(s)
- Nisha Yadav
- Materials
Chemistry Laboratory, Department of Chemistry, School of
Natural Sciences, and Computational Materials Physics Laboratory, Department
of Physics, School of Natural Sciences, Shiv Nadar University, Gautam Buddha Nagar, Greater Noida, Uttar Pradesh 201314, India
| | - Vedha Kallur
- Materials
Chemistry Laboratory, Department of Chemistry, School of
Natural Sciences, and Computational Materials Physics Laboratory, Department
of Physics, School of Natural Sciences, Shiv Nadar University, Gautam Buddha Nagar, Greater Noida, Uttar Pradesh 201314, India
| | - Dwaipayan Chakraborty
- Materials
Chemistry Laboratory, Department of Chemistry, School of
Natural Sciences, and Computational Materials Physics Laboratory, Department
of Physics, School of Natural Sciences, Shiv Nadar University, Gautam Buddha Nagar, Greater Noida, Uttar Pradesh 201314, India
| | - Priya Johari
- Materials
Chemistry Laboratory, Department of Chemistry, School of
Natural Sciences, and Computational Materials Physics Laboratory, Department
of Physics, School of Natural Sciences, Shiv Nadar University, Gautam Buddha Nagar, Greater Noida, Uttar Pradesh 201314, India
| | - Bimlesh Lochab
- Materials
Chemistry Laboratory, Department of Chemistry, School of
Natural Sciences, and Computational Materials Physics Laboratory, Department
of Physics, School of Natural Sciences, Shiv Nadar University, Gautam Buddha Nagar, Greater Noida, Uttar Pradesh 201314, India
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40
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Farell M, Wetherington M, Shankla M, Chae I, Subramanian S, Kim SH, Aksimentiev A, Robinson J, Kumar M. Characterization of the Lipid Structure and Fluidity of Lipid Membranes on Epitaxial Graphene and Their Correlation to Graphene Features. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:4726-4735. [PMID: 30844287 PMCID: PMC6449857 DOI: 10.1021/acs.langmuir.9b00164] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Graphene has been recognized as an enhanced platform for biosensors because of its high electron mobility. To integrate active membrane proteins into graphene-based materials for such applications, graphene's surface must be functionalized with lipids to mimic the biological environment of these proteins. Several studies have examined supported lipids on various types of graphene and obtained conflicting results for the lipid structure. Here, we present a correlative characterization technique based on fluorescence measurements in a Raman spectroscopy setup to study the lipid structure and dynamics on epitaxial graphene. Compared to other graphene variations, epitaxial graphene is grown on a substrate more conducive to production of electronics and offers unique topographic features. On the basis of experimental and computational results, we propose that a lipid sesquilayer (1.5 bilayer) forms on epitaxial graphene and demonstrate that the distinct surface features of epitaxial graphene affect the structure and diffusion of supported lipids.
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Affiliation(s)
| | | | - Manish Shankla
- Department of Physics , University of Illinois at Urbana Champaign , Urbana , Illinois 61801 , United States
| | | | | | | | - Aleksei Aksimentiev
- Department of Physics , University of Illinois at Urbana Champaign , Urbana , Illinois 61801 , United States
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41
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Govind Rajan A, Strano MS, Blankschtein D. Liquids with Lower Wettability Can Exhibit Higher Friction on Hexagonal Boron Nitride: The Intriguing Role of Solid-Liquid Electrostatic Interactions. NANO LETTERS 2019; 19:1539-1551. [PMID: 30694070 DOI: 10.1021/acs.nanolett.8b04335] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
We investigate the wetting and frictional behavior of polar (water and ethylene glycol) and nonpolar (diiodomethane) liquids on the basal plane of hexagonal boron nitride (hBN) using molecular dynamics simulations. Our results for the wettability of water on the hBN basal plane (contact angle 81°) are in qualitative agreement with the experimentally deduced mild hydrophilicity of the hBN basal plane (contact angle 66°). We find that water exhibits the lowest wettability, as quantified by the highest contact angle, but the highest friction coefficient of (1.9 ± 0.4) × 105 N-s/m3 on the hBN basal plane among the three liquids considered. This intriguing finding is explained in terms of the competition between dispersion and electrostatic interactions operating between the hBN basal plane and the three liquids. We find that electrostatic interactions do not affect the wetting behavior appreciably, as quantified by a less than 3° change in the respective contact angles of the three liquids considered. On the other hand, electrostatic interactions are found to increase the friction coefficients of the three liquids in contact with hBN to different extents, indicating that despite the increased friction of water on hBN, relative to that on graphene, nonpolar liquids may exhibit similar friction coefficients on hBN and graphene. Our findings reveal that the increase in the friction coefficient, upon incorporation of solid-liquid electrostatic interactions, is brought about by a greater increase in the solid-liquid mean-squared total lateral force, as compared to a smaller reduction in the decorrelation time of the solid-liquid force.
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Affiliation(s)
- Ananth Govind Rajan
- Department of Chemical Engineering , Massachusetts Institute of Technology , Cambridge , Massachusetts 02139 , United States
| | - Michael S Strano
- Department of Chemical Engineering , Massachusetts Institute of Technology , Cambridge , Massachusetts 02139 , United States
| | - Daniel Blankschtein
- Department of Chemical Engineering , Massachusetts Institute of Technology , Cambridge , Massachusetts 02139 , United States
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42
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Xu W, Zhou X, Hao C, Zheng H, Liu Y, Yan X, Yang Z, Leung M, Zeng XC, Xu RX, Wang Z. SLIPS-TENG: robust triboelectric nanogenerator with optical and charge transparency using a slippery interface. Natl Sci Rev 2019; 6:540-550. [PMID: 34691903 PMCID: PMC8291521 DOI: 10.1093/nsr/nwz025] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2019] [Revised: 02/13/2019] [Accepted: 02/14/2019] [Indexed: 11/14/2022] Open
Abstract
Abstract
Energy harvesting devices that prosper in harsh environments are highly demanded in a wide range of applications ranging from wearable and biomedical devices to self-powered and intelligent systems. Particularly, over the past several years, the innovation of triboelectric nanogenerators (TENGs) that efficiently convert ambient kinetic energy of water droplets or wave power to electricity has received growing attention. One of the main bottlenecks for the practical implications of such devices originates from the fast degradation of the physiochemical properties of interfacial materials under harsh environments. To overcome these challenges, here we report the design of a novel slippery lubricant-impregnated porous surface (SLIPS) based TENG, referred to as SLIPS-TENG, which exhibits many distinctive advantages over conventional design including optical transparency, configurability, self-cleaning, flexibility, and power generation stability, in a wide range of working environments. Unexpectedly, the slippery and configurable lubricant layer not only serves as a unique substrate for liquid/droplet transport and optical transmission, but also for efficient charge transfer. Moreover, we show that there exists a critical thickness in the liquid layer, below which the triboelectric effect is almost identical to that without the presence of such a liquid film. Such an intriguing charge transparency behavior is reminiscent of the wetting transparency and van der Waals potential transparency of graphene previously reported, though the fundamental mechanism remains to be elucidated. We envision that the marriage of these two seemingly totally different arenas (SLIPS and TENG) provides a paradigm shift in the design of robust and versatile energy devices that can be used as a clean and longer-lifetime alternative in various working environments.
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Affiliation(s)
- Wanghuai Xu
- Department of Mechanical Engineering, City University of Hong Kong, Hong Kong, China
- Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, Hefei 230026, China
| | - Xiaofeng Zhou
- Department of Mechanical Engineering, City University of Hong Kong, Hong Kong, China
- Shanghai Key Laboratory of Multidimensional Information Processing, Department of Electronic Engineering, East China Normal University, Shanghai 200241, China
| | - Chonglei Hao
- Department of Mechanical Engineering, City University of Hong Kong, Hong Kong, China
| | - Huanxi Zheng
- Department of Mechanical Engineering, City University of Hong Kong, Hong Kong, China
| | - Yuan Liu
- Department of Chemistry, University of Nebraska-Lincoln, Lincoln, NE 68588, USA
| | - Xiantong Yan
- Department of Mechanical Engineering, City University of Hong Kong, Hong Kong, China
| | - Zhengbao Yang
- Department of Mechanical Engineering, City University of Hong Kong, Hong Kong, China
| | - Michael Leung
- School of Energy and Environment, City University of Hong Kong, Hong Kong, China
| | - Xiao Cheng Zeng
- Department of Chemistry, University of Nebraska-Lincoln, Lincoln, NE 68588, USA
| | - Ronald X Xu
- Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, Hefei 230026, China
| | - Zuankai Wang
- Department of Mechanical Engineering, City University of Hong Kong, Hong Kong, China
- Department of Materials Science and Engineering, City University of Hong Kong, Hong Kong, China
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43
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Feng J, Guo Z. Wettability of graphene: from influencing factors and reversible conversions to potential applications. NANOSCALE HORIZONS 2019; 4:339-364. [PMID: 32254088 DOI: 10.1039/c8nh00348c] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
As a member of the carbon material family, graphene has long been the focus of research on account of its abundant excellent properties. Nevertheless, many previous research works have attached much importance to its mechanical capacity and electrical properties, and not to its surface wetting properties with respect to water. In this review, a series of methods are put forward for characterization of the water contact angle of graphene, such as experimental measurements, classic molecular dynamics simulations, and formula calculations. A series of factors that affect the wettability of graphene, including defects, controllable atmosphere, doping, and electric field, are also discussed in detail, and have rarely have been covered in other review articles before. Finally, with the developments of smart surfaces, a reversible wettability variation of graphene from hydrophobic to hydrophilic is important in the presence of external stimulation and is discussed in detail herein. It is anticipated that graphene could serve as a tunable wettability coating for further developments in electronic devices and brings a new perspective to the construction of smart material surfaces.
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Affiliation(s)
- Jing Feng
- Hubei Collaborative Innovation Centre for Advanced Organic Chemical Materials and Ministry of Education Key Laboratory for the Green Preparation and Application of Functional Materials, Hubei University, Wuhan 430062, People's Republic of China
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44
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Ångstrom-Scale, Atomically Thin 2D Materials for Corrosion Mitigation and Passivation. COATINGS 2019. [DOI: 10.3390/coatings9020133] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Metal deterioration via corrosion is a ubiquitous and persistent problem. Ångstrom-scale, atomically thin 2D materials are promising candidates for effective, robust, and economical corrosion passivation coatings due to their ultimate thinness and excellent mechanical and electrical properties. This review focuses on elucidating the mechanism of 2D materials in corrosion mitigation and passivation related to their physicochemical properties and variations, such as defects, out-of-plane deformations, interfacial states, temporal and thickness variations, etc. In addition, this review discusses recent progress and developments of 2D material coatings for corrosion mitigation and passivation as well as the significant challenges to overcome in the future.
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45
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Zheng W, Chen W, zhao Q, Ren S, Fu Y. Interfacial structures and mechanisms for strengthening and enhanced conductivity of graphene/epoxy nanocomposites. POLYMER 2019. [DOI: 10.1016/j.polymer.2018.12.055] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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46
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Chu ED, Wang PH, Hong YZ, Woon WY, Chiu HC. Frictional characteristics of nano-confined water mediated hole-doped single-layer graphene on silica surface. NANOTECHNOLOGY 2019; 30:045706. [PMID: 30479310 DOI: 10.1088/1361-6528/aaed5b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
We have investigated the frictional properties of single-layer graphene (SLG) coated rough silica substrate under the influence of nano-confined hydration layer underneath SLG. Through the friction and surface potential measurements by atomic force microscopy (AFM), we found polygonal features in AFM images of SLG-protected silica surface that exhibit simultaneously larger friction and higher surface potential as compared to their surrounding areas due to water layers confined under SLG. Nano-confined water layers at the SLG-silica interface can induce the hole-doping effect in SLG, resulting in a more positively-charged and hydrophilic surface that favors adsorption of ambient water molecules. Therefore, during friction measurements, nanoscale capillary bridges can form within the interstices of AFM probe-SLG contact, leading to larger adhesion and friction. The friction forces were found to respectively have negative and positive dependence on the sliding velocity inside and outside the polygonal regions due to different surface wettability. Hence, it is possible to manipulate the frictional properties of SLG-coated silica by the amount of hydration layer confined underneath SLG. Our results may find applications in friction control for future nano-devices.
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Affiliation(s)
- En-De Chu
- Department of Physics, National Taiwan Normal University, Taipei, 11677 Taiwan
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47
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Yan H, Wu F, Xue Y, Bryan K, Ma W, Yu P, Mao L. Water Adsorption and Transport on Oxidized Two‐Dimensional Carbon Materials. Chemistry 2019; 25:3969-3978. [DOI: 10.1002/chem.201805008] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2018] [Indexed: 12/25/2022]
Affiliation(s)
- Hailong Yan
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of, Analytical Chemistry for Living BiosystemsInstitute of Chemistry, The Chinese Academy of Sciences (CAS), CAS Research/Education Center for, Excellence in Molecule Science Beijing 100190 China
- University of CAS Beijing 100049 China
| | - Fei Wu
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of, Analytical Chemistry for Living BiosystemsInstitute of Chemistry, The Chinese Academy of Sciences (CAS), CAS Research/Education Center for, Excellence in Molecule Science Beijing 100190 China
| | - Yifei Xue
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of, Analytical Chemistry for Living BiosystemsInstitute of Chemistry, The Chinese Academy of Sciences (CAS), CAS Research/Education Center for, Excellence in Molecule Science Beijing 100190 China
- University of CAS Beijing 100049 China
| | - Kevin Bryan
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of, Analytical Chemistry for Living BiosystemsInstitute of Chemistry, The Chinese Academy of Sciences (CAS), CAS Research/Education Center for, Excellence in Molecule Science Beijing 100190 China
- Current address: Junipero Serra High School 451 west 20th Avenue San Mateo CA 94403 USA
| | - Wenjie Ma
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of, Analytical Chemistry for Living BiosystemsInstitute of Chemistry, The Chinese Academy of Sciences (CAS), CAS Research/Education Center for, Excellence in Molecule Science Beijing 100190 China
| | - Ping Yu
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of, Analytical Chemistry for Living BiosystemsInstitute of Chemistry, The Chinese Academy of Sciences (CAS), CAS Research/Education Center for, Excellence in Molecule Science Beijing 100190 China
- University of CAS Beijing 100049 China
| | - Lanqun Mao
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of, Analytical Chemistry for Living BiosystemsInstitute of Chemistry, The Chinese Academy of Sciences (CAS), CAS Research/Education Center for, Excellence in Molecule Science Beijing 100190 China
- University of CAS Beijing 100049 China
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48
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Jin Y, Tao R, Li Z. Understanding flow enhancement in graphene-coated nanochannels. Electrophoresis 2019; 40:859-864. [DOI: 10.1002/elps.201800465] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2018] [Revised: 12/04/2018] [Accepted: 12/17/2018] [Indexed: 11/06/2022]
Affiliation(s)
- Yakang Jin
- Department of Mechanical and Aerospace Engineering; The Hong Kong University of Science and Technology; Hong Kong S. A. R. P. R. China
| | - Ran Tao
- Department of Mechanical and Aerospace Engineering; The Hong Kong University of Science and Technology; Hong Kong S. A. R. P. R. China
| | - Zhigang Li
- Department of Mechanical and Aerospace Engineering; The Hong Kong University of Science and Technology; Hong Kong S. A. R. P. R. China
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49
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Kong W, Li H, Qiao K, Kim Y, Lee K, Nie Y, Lee D, Osadchy T, Molnar RJ, Gaskill DK, Myers-Ward RL, Daniels KM, Zhang Y, Sundram S, Yu Y, Bae SH, Rajan S, Shao-Horn Y, Cho K, Ougazzaden A, Grossman JC, Kim J. Polarity governs atomic interaction through two-dimensional materials. NATURE MATERIALS 2018; 17:999-1004. [PMID: 30297812 DOI: 10.1038/s41563-018-0176-4] [Citation(s) in RCA: 86] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2017] [Accepted: 08/28/2018] [Indexed: 05/27/2023]
Abstract
The transparency of two-dimensional (2D) materials to intermolecular interactions of crystalline materials has been an unresolved topic. Here we report that remote atomic interaction through 2D materials is governed by the binding nature, that is, the polarity of atomic bonds, both in the underlying substrates and in 2D material interlayers. Although the potential field from covalent-bonded materials is screened by a monolayer of graphene, that from ionic-bonded materials is strong enough to penetrate through a few layers of graphene. Such field penetration is substantially attenuated by 2D hexagonal boron nitride, which itself has polarization in its atomic bonds. Based on the control of transparency, modulated by the nature of materials as well as interlayer thickness, various types of single-crystalline materials across the periodic table can be epitaxially grown on 2D material-coated substrates. The epitaxial films can subsequently be released as free-standing membranes, which provides unique opportunities for the heterointegration of arbitrary single-crystalline thin films in functional applications.
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Affiliation(s)
- Wei Kong
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Huashan Li
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA
- Sino-French Institute for Nuclear Energy and Technology, Sun Yat-Sen University, Guangzhou, China
| | - Kuan Qiao
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Yunjo Kim
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Kyusang Lee
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA
- Departments of Electrical and Computer Engineering & Materials Science and Engineering, University of Virginia, Charlottesville, VA, USA
| | - Yifan Nie
- Department of Materials Science and Engineering, The University of Texas at Dallas, Richardson, TX, USA
| | - Doyoon Lee
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA
| | | | | | | | | | | | - Yuewei Zhang
- Department of Electrical and Computer Engineering, The Ohio State University, Columbus, OH, USA
| | - Suresh Sundram
- School of Electrical and Computer Engineering, Georgia Institute of Technology, GT-Lorraine, UMI 2958 Georgia Tech-CNRS, Metz, France
| | - Yang Yu
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Sang-Hoon Bae
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Siddharth Rajan
- Department of Electrical and Computer Engineering, The Ohio State University, Columbus, OH, USA
| | - Yang Shao-Horn
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Kyeongjae Cho
- Department of Materials Science and Engineering, The University of Texas at Dallas, Richardson, TX, USA
| | - Abdallah Ougazzaden
- School of Electrical and Computer Engineering, Georgia Institute of Technology, GT-Lorraine, UMI 2958 Georgia Tech-CNRS, Metz, France
| | - Jeffrey C Grossman
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA.
| | - Jeehwan Kim
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA.
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA.
- Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, MA, USA.
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50
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Caccia M, Giuranno D, Molina-Jorda JM, Moral M, Nowak R, Ricci E, Sobczak N, Narciso J, Fernández Sanz J. Graphene Translucency and Interfacial Interactions in the Gold/Graphene/SiC System. J Phys Chem Lett 2018; 9:3850-3855. [PMID: 29939752 DOI: 10.1021/acs.jpclett.8b01384] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Integration of graphene into electronic circuits through its joining with conventional metal electrodes (i.e., gold) appears to be one of the main technological challenges nowadays. To gain insight into this junction, we have studied the physicochemical interactions between SiC-supported graphene and a drop of molten gold. Using appropriate high-temperature experimental conditions, we perform wetting experiments and determine contact angles for gold drops supported on graphene epitaxially grown on 4H-SiC. The properties of the metal/graphene interface are analyzed using a wide variety of characterization techniques, along with computational simulations based on density functional theory. In contrast with the established literature, our outcomes clearly show that graphene is translucent in the gold/graphene/SiC interface, and therefore its integration into electronic circuits primarily depends on the right choice of the support to produce favorable wetting interactions with liquid gold.
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Affiliation(s)
- Mario Caccia
- Departamento de Química Inorgánica e Instituto Universitario de Materiales de Alicante , Universidad de Alicante , 03690 San Vicente del Raspeig , Alicante , Spain
| | - Donatella Giuranno
- Institute of Condensed Matter Chemistry and Energy Technologies (ICMATE) , National Research Council (CNR) , 16149 Genoa , Italy
| | - José M Molina-Jorda
- Departamento de Química Inorgánica e Instituto Universitario de Materiales de Alicante , Universidad de Alicante , 03690 San Vicente del Raspeig , Alicante , Spain
| | - Mónica Moral
- Departamento de Química Física , Universidad de Sevilla , 41004 Sevilla , Spain
| | - Rafal Nowak
- Foundry Research Institute , 30-418 Krakow , Poland
| | - Enrica Ricci
- Institute of Condensed Matter Chemistry and Energy Technologies (ICMATE) , National Research Council (CNR) , 16149 Genoa , Italy
| | | | - Javier Narciso
- Departamento de Química Inorgánica e Instituto Universitario de Materiales de Alicante , Universidad de Alicante , 03690 San Vicente del Raspeig , Alicante , Spain
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