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Yang F, Thompson AG, McQuain AD, Gundurao D, Stando G, Kim MA, Liu H, Li L. Wetting Transparency of Single-Layer Graphene on Liquid Substrates. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024:e2403820. [PMID: 38720475 DOI: 10.1002/adma.202403820] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2024] [Revised: 05/06/2024] [Indexed: 05/15/2024]
Abstract
Graphene's wetting transparency offers promising avenues for creating multifunctional devices by allowing real-time wettability control on liquid substrates via the flow of different liquids beneath graphene. Despite its potential, direct measurement of floating graphene's wettability remains a challenge, hindering the exploration of these applications. The current study develops an experimental methodology to assess the wetting transparency of single-layer graphene (SLG) on liquid substrates. By employing contact angle measurements and Neumann's Triangle model, the challenge of evaluating the wettability of floating free-suspended single-layer graphene is addressed. The research reveals that for successful contact angle measurements, the testing and substrate liquids must be immiscible. Using diiodomethane as the testing liquid and ammonium persulfate solution as liquid substrate, the study demonstrates the near-complete wetting transparency of graphene. Furthermore, it successfully showcases the feasibility of real-time wettability control using graphene on liquid substrates. This work not only advances the understanding of graphene's interaction with liquid interfaces but also suggests a new avenue for the development of multifunctional materials and devices by exploiting the unique wetting transparency of graphene.
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Affiliation(s)
- Fan Yang
- Department of Chemical & Petroleum Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania, 15261, USA
| | - Annette G Thompson
- Department of Chemical & Petroleum Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania, 15261, USA
| | - Alex D McQuain
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania, 15260, USA
| | - Dhruthi Gundurao
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania, 15260, USA
| | - Grzegorz Stando
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania, 15260, USA
| | - Min A Kim
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania, 15260, USA
| | - Haitao Liu
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania, 15260, USA
| | - Lei Li
- Department of Chemical & Petroleum Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania, 15261, USA
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2
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Hu H, Qian S, Shi Q, Du M, Sun N, Ding Y, Li J, Luo Q, Li Z, He L, Sun Y, Li Y. Cu-phen Coordination Enabled Selective Electrocatalytic Reduction of CO 2 to Methane. ACS APPLIED MATERIALS & INTERFACES 2024; 16:22025-22034. [PMID: 38634322 DOI: 10.1021/acsami.4c02810] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/19/2024]
Abstract
Manipulation of selectivity in the catalytic electrochemical carbon dioxide reduction reaction (eCO2RR) poses significant challenges due to inevitable structure reconstruction. One approach is to develop effective strategies for controlling reaction pathways to gain a deeper understanding of mechanisms in robust CO2RR systems. In this work, by precise introduction of 1,10-phenanthroline as a bidentate ligand modulator, the electronic property of the copper site was effectively regulated, thereby directing selectivity switch. By modification of [Cu3(btec)(OH)2]n, the use of [Cu2(btec)(phen)2]n·(H2O)n achieved the selectivity switch from ethylene (faradaic efficiency (FE) = 41%, FEC2+ = 67%) to methane (FECH4 = 69%). Various in situ spectroscopic characterizations revealed that [Cu2(btec)(phen)2]n·(H2O)n promoted the hydrogenation of *CO intermediates, leading to methane generation instead of dimerization to form C2+ products. Acting as a delocalized π-conjugation scaffold, 1,10-phenanthroline in [Cu2(btec)(phen)2]n·(H2O)n helps stabilize Cuδ+. This work presents a novel approach to regulate the coordination environment of active sites with the aim of selectively modulating the CO2RR.
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Affiliation(s)
- Haiyan Hu
- State Key Laboratory of Low Carbon Catalysis and Carbon Dioxide Utilization; State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics (LICP), Chinese Academy of Sciences, Lanzhou 730000, P. R. China
- State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Advanced Catalysis of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Shiting Qian
- School of Chemistry and Chemical Engineering, School of Materials Science and Engineering, Institute of Physical Science and Information Technology, Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials, Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of Education, Anhui University, Hefei 230601, Anhui P. R. China
| | - Qin Shi
- State Key Laboratory of Low Carbon Catalysis and Carbon Dioxide Utilization; State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics (LICP), Chinese Academy of Sciences, Lanzhou 730000, P. R. China
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Minxing Du
- State Key Laboratory of Low Carbon Catalysis and Carbon Dioxide Utilization; State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics (LICP), Chinese Academy of Sciences, Lanzhou 730000, P. R. China
| | - Ning Sun
- Frontiers Science Center for Transformative Molecules, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
| | - Yong Ding
- State Key Laboratory of Low Carbon Catalysis and Carbon Dioxide Utilization; State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics (LICP), Chinese Academy of Sciences, Lanzhou 730000, P. R. China
- State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Advanced Catalysis of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P. R. China
| | - Jun Li
- Frontiers Science Center for Transformative Molecules, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
| | - Qiquan Luo
- School of Chemistry and Chemical Engineering, School of Materials Science and Engineering, Institute of Physical Science and Information Technology, Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials, Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of Education, Anhui University, Hefei 230601, Anhui P. R. China
| | - Zhen Li
- State Key Laboratory of Low Carbon Catalysis and Carbon Dioxide Utilization; State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics (LICP), Chinese Academy of Sciences, Lanzhou 730000, P. R. China
| | - Lin He
- State Key Laboratory of Low Carbon Catalysis and Carbon Dioxide Utilization; State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics (LICP), Chinese Academy of Sciences, Lanzhou 730000, P. R. China
| | - Yuxia Sun
- State Key Laboratory of Low Carbon Catalysis and Carbon Dioxide Utilization; State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics (LICP), Chinese Academy of Sciences, Lanzhou 730000, P. R. China
| | - Yuehui Li
- State Key Laboratory of Low Carbon Catalysis and Carbon Dioxide Utilization; State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics (LICP), Chinese Academy of Sciences, Lanzhou 730000, P. R. China
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3
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Verma AK, Sharma BB. Experimental and Theoretical Insights into Interfacial Properties of 2D Materials for Selective Water Transport Membranes: A Critical Review. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:7812-7834. [PMID: 38587122 DOI: 10.1021/acs.langmuir.4c00061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/09/2024]
Abstract
Interfacial properties, such as wettability and friction, play critical roles in nanofluidics and desalination. Understanding the interfacial properties of two-dimensional (2D) materials is crucial in these applications due to the close interaction between liquids and the solid surface. The most important interfacial properties of a solid surface include the water contact angle, which quantifies the extent of interactions between the surface and water, and the water slip length, which determines how much faster water can flow on the surface beyond the predictions of continuum fluid mechanics. This Review seeks to elucidate the mechanism that governs the interfacial properties of diverse 2D materials, including transition metal dichalcogenides (e.g., MoS2), graphene, and hexagonal boron nitride (hBN). Our work consolidates existing experimental and computational insights into 2D material synthesis and modeling and explores their interfacial properties for desalination. We investigated the capabilities of density functional theory and molecular dynamics simulations in analyzing the interfacial properties of 2D materials. Specifically, we highlight how MD simulations have revolutionized our understanding of these properties, paving the way for their effective application in desalination. This Review of the synthesis and interfacial properties of 2D materials unlocks opportunities for further advancement and optimization in desalination.
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Affiliation(s)
- Ashutosh Kumar Verma
- School of Chemical Engineering, Oklahoma State University, Stillwater, Oklahoma 74078, United States
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Caddeo F, Himmelstein F, Mahmoudi B, Araújo-Cordero AM, Eberhart D, Zhang H, Lindenberg T, Hähnel A, Hagendorf C, Maijenburg AW. Coating the surface of interconnected Cu 2O nanowire arrays with HKUST-1 nanocrystals via electrochemical oxidation. Sci Rep 2023; 13:13858. [PMID: 37620380 PMCID: PMC10449819 DOI: 10.1038/s41598-023-39982-x] [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: 05/09/2023] [Accepted: 08/03/2023] [Indexed: 08/26/2023] Open
Abstract
Controlling the crystallization of Metal-Organic Frameworks (MOFs) at the nanoscale is currently challenging, and this hinders their utilization for multiple applications including photo(electro)chemistry and sensors. In this work, we show a synthetic protocol that enables the preparation of highly homogeneous Cu2O@MOF nanowires standing on a conductive support with extensive control over the crystallization of the MOF nanoparticles at the surface of the Cu2O nanowires. Cu2O nanowires were first prepared via templated electrodeposition, and then partially converted into the well-known Cu-MOF HKUST-1 by pulsed electrochemical oxidation. We show that the use of PVP as a capping agent during the electrochemical oxidation of Cu2O into HKUST-1 provides control over the growth of the MOF nanocrystals on the surface of the Cu2O nanowires, and that the size of the MOF crystals obtained can be tuned by changing the concentration of PVP dissolved in the electrolyte. In addition, we propose the use of benzoic acid as an alternative to achieve control over the size of the obtained MOF nanocrystals when the use of a capping agent should be avoided.
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Affiliation(s)
- Francesco Caddeo
- Center for Innovation Competence SiLi-Nano, Martin Luther University Halle-Wittenberg, Karl-Freiherr-von-Fritsch-Straße 3, 06120, Halle (Saale), Germany
- Institute of Chemistry, Martin Luther University Halle-Wittenberg, Kurt-Mothes-Straße 2, 06120, Halle (Saale), Germany
- Center for Hybrid Nanostructures (CHyN), Institute of Nanostructure and Solid State Physics, University of Hamburg, 22607, Hamburg, Germany
| | - Florian Himmelstein
- Center for Innovation Competence SiLi-Nano, Martin Luther University Halle-Wittenberg, Karl-Freiherr-von-Fritsch-Straße 3, 06120, Halle (Saale), Germany
- Institute of Chemistry, Martin Luther University Halle-Wittenberg, Kurt-Mothes-Straße 2, 06120, Halle (Saale), Germany
| | - Behzad Mahmoudi
- Center for Innovation Competence SiLi-Nano, Martin Luther University Halle-Wittenberg, Karl-Freiherr-von-Fritsch-Straße 3, 06120, Halle (Saale), Germany
- Institute of Chemistry, Martin Luther University Halle-Wittenberg, Kurt-Mothes-Straße 2, 06120, Halle (Saale), Germany
| | - Ana María Araújo-Cordero
- Center for Innovation Competence SiLi-Nano, Martin Luther University Halle-Wittenberg, Karl-Freiherr-von-Fritsch-Straße 3, 06120, Halle (Saale), Germany
- Institute of Chemistry, Martin Luther University Halle-Wittenberg, Kurt-Mothes-Straße 2, 06120, Halle (Saale), Germany
| | - Denis Eberhart
- Center for Innovation Competence SiLi-Nano, Martin Luther University Halle-Wittenberg, Karl-Freiherr-von-Fritsch-Straße 3, 06120, Halle (Saale), Germany
- Institute of Chemistry, Martin Luther University Halle-Wittenberg, Kurt-Mothes-Straße 2, 06120, Halle (Saale), Germany
| | - Haojie Zhang
- Center for Innovation Competence SiLi-Nano, Martin Luther University Halle-Wittenberg, Karl-Freiherr-von-Fritsch-Straße 3, 06120, Halle (Saale), Germany
- Institute of Physics, Martin Luther University Halle-Wittenberg, Heinrich-Damerow-Straße 4, 06120, Halle (Saale), Germany
- Max Planck Institute of Microstructure Physics, Weinberg 2, 06120, Halle (Saale), Germany
| | - Titus Lindenberg
- Center for Innovation Competence SiLi-Nano, Martin Luther University Halle-Wittenberg, Karl-Freiherr-von-Fritsch-Straße 3, 06120, Halle (Saale), Germany
- Institute of Chemistry, Martin Luther University Halle-Wittenberg, Kurt-Mothes-Straße 2, 06120, Halle (Saale), Germany
| | - Angelika Hähnel
- Fraunhofer Center for Silicon Photovoltaics CSP, Otto-Eißfeldt-Straße 12, 06120, Halle (Saale), Germany
| | - Christian Hagendorf
- Fraunhofer Center for Silicon Photovoltaics CSP, Otto-Eißfeldt-Straße 12, 06120, Halle (Saale), Germany
| | - A Wouter Maijenburg
- Center for Innovation Competence SiLi-Nano, Martin Luther University Halle-Wittenberg, Karl-Freiherr-von-Fritsch-Straße 3, 06120, Halle (Saale), Germany.
- Institute of Chemistry, Martin Luther University Halle-Wittenberg, Kurt-Mothes-Straße 2, 06120, Halle (Saale), Germany.
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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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6
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Lößlein SM, Merz R, Müller DW, Kopnarski M, Mücklich F. An in-depth evaluation of sample and measurement induced influences on static contact angle measurements. Sci Rep 2022; 12:19389. [PMID: 36371459 PMCID: PMC9653445 DOI: 10.1038/s41598-022-23341-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Accepted: 10/30/2022] [Indexed: 11/13/2022] Open
Abstract
Static contact angle measurements are one of the most popular methods to analyze the wetting behavior of materials of any kind. Although this method is readily applicable without the need of sophisticated machinery, the results obtained for the very same material may vary strongly. The sensitivity of the measurement against environmental conditions, sample preparation and measurement conduction is a main factor for inconsistent results. Since often no detailed measurement protocols exist alongside published data, contact angle values as well as elaborated wetting studies do not allow for any comparison. This paper therefore aims to discuss possible influences on static contact angle measurements and to experimentally demonstrate the extent of these effects. Sample storage conditions, cleaning procedures, droplet volume, water grade and droplet application as well as the influence of evaporation on the static contact angle are investigated in detail. Especially sample storage led to differences in the contact angle up to 60%. Depending on the wetting state, evaporation can reduce the contact angle by 30–50% within 10 min in dry atmospheres. Therefore, this paper reviews an existing approach for a climate chamber and introduces a new measuring setup based on these results. It allows for the observation of the wetting behavior for several minutes by successfully suppressing evaporation without negatively affecting the surface prior to measurement by exposure to high humidity environments.
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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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8
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Electronic interactions and stability issues at the copper-graphene interface in air and in alkaline solution under electrochemical control. Electrochim Acta 2022. [DOI: 10.1016/j.electacta.2022.141145] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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9
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Liu Q, Wang S, Han F, Lv S, Yan Z, Xi Y, Ouyang J. Biomimetic Tremelliform Ultrathin MnO 2/CuO Nanosheets on Kaolinite Driving Superior Catalytic Oxidation: An Example of CO. ACS APPLIED MATERIALS & INTERFACES 2022; 14:44345-44357. [PMID: 36150181 DOI: 10.1021/acsami.2c11640] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Highly efficient three-dimensional (3D) kaolinite/MnO2-CuO (KM@CuO-NO3) catalysts were synthesized by a mild biomimetic strategy. Kaolinite flakes were uniformly wrapped by ultrathin tremelliform MnO2 nanosheets with thicknesses of around 1.0-1.5 nm. Si-O and Al-O groups in kaolinite hosted MnO2 nanosheets to generate a robust composite structure. The ultrathin MnO2 lamellar structure exhibited excellent stability even after calcination above 350 °C. Kaolinite/MnO2 exhibited abundant edges, sharp corners, and interconnected diffusion channels, which are superior to the common stacked structure. Open channels guaranteed fast transportation and migration of CO and O2 during CO oxidation. The synthesized KM@CuO-NO3 achieved a 90% CO conversion efficiency at a relatively low temperature (110 °C). Furthermore, the abundant oxygen vacancies on KM@CuO-NO3 assisted the adsorption and activation of oxygen species and thus enhanced the oxygen mobility and reactivity in the catalytic process. The mechanism results suggest that CuO introduced to the catalyst not only acted as CO active sites but also weakened the Mn-O bond, subsequently improved the mobilities of the oxygen species, which was found to contribute to its high activity for CO oxidation. This study provides new conceptual insights into rationally regulating structural assembly between transition metal oxides and natural minerals for high-performance catalysis reactions.
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Affiliation(s)
- Qinghe Liu
- Department of Inorganic Materials, School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China
| | - Sen Wang
- Central Analytical Research Facility and School of Chemistry and Physics, Faculty of Science, Queensland University of Technology, Brisbane, Queensland 4001, Australia
| | - Fei Han
- Department of Inorganic Materials, School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China
| | - Shupei Lv
- Department of Inorganic Materials, School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China
| | - Zairong Yan
- Department of Inorganic Materials, School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China
| | - Yunfei Xi
- Central Analytical Research Facility and School of Chemistry and Physics, Faculty of Science, Queensland University of Technology, Brisbane, Queensland 4001, Australia
| | - Jing Ouyang
- Department of Inorganic Materials, School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China
- Hunan Key Lab of Mineral Materials and Application, Central South University, Changsha 410083, China
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Kadam RG, Ye TN, Zaoralová D, Medveď M, Sharma P, Lu Y, Zoppellaro G, Tomanec O, Otyepka M, Zbořil R, Hosono H, Gawande MB. Intermetallic Copper-Based Electride Catalyst with High Activity for C-H Oxidation and Cycloaddition of CO 2 into Epoxides. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2201712. [PMID: 36026533 DOI: 10.1002/smll.202201712] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2022] [Revised: 07/15/2022] [Indexed: 06/15/2023]
Abstract
Inorganic electrides have been proved to be efficient hosts for incorporating transition metals, which can effectively act as active sites giving an outstanding catalytic performance. Here, it is demonstrated that a reusable and recyclable (for more than 7 times) copper-based intermetallic electride catalyst (LaCu0.67 Si1.33 ), in which the Cu sites activated by anionic electrons with low-work function are uniformly dispersed in the lattice framework, shows vast potential for the selective C-H oxidation of industrially important hydrocarbons and cycloaddition of CO2 with epoxide. This leads to the production of value-added cyclic carbonates under mild reaction conditions. Importantly, the LaCu0.67 Si1.33 catalyst enables much higher turnover frequencies for the C-H oxidation (up to 25 276 h-1 ) and cycloaddition of CO2 into epoxide (up to 800 000 h-1 ), thus exceeding most nonnoble as well as noble metal catalysts. Density functional theory investigations have revealed that the LaCu0.67 Si1.33 catalyst is involved in the conversion of N-hydroxyphthalimide (NHPI) into the phthalimido-N-oxyl (PINO), which then triggers selective abstraction of an H atom from ethylbenzene for the generation of a radical susceptible to further oxygenation in the presence of O2 .
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Affiliation(s)
- Ravishankar G Kadam
- Regional Centre of Advanced Technologies and Materials, Czech Advanced Technology and Research Institute (CATRIN), Palacký University Olomouc, Šlechtitelů 27, Olomouc, 779 00, Czech Republic
| | - Tian-Nan Ye
- Frontiers Science Center for Transformative Molecules, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Dagmar Zaoralová
- Regional Centre of Advanced Technologies and Materials, Czech Advanced Technology and Research Institute (CATRIN), Palacký University Olomouc, Šlechtitelů 27, Olomouc, 779 00, Czech Republic
- IT4Innovations, VŠB-Technical University of Ostrava, 17. listopadu 2172/15, Ostrava-Poruba, 708 00, Czech Republic
| | - Miroslav Medveď
- Regional Centre of Advanced Technologies and Materials, Czech Advanced Technology and Research Institute (CATRIN), Palacký University Olomouc, Šlechtitelů 27, Olomouc, 779 00, Czech Republic
| | - Priti Sharma
- Regional Centre of Advanced Technologies and Materials, Czech Advanced Technology and Research Institute (CATRIN), Palacký University Olomouc, Šlechtitelů 27, Olomouc, 779 00, Czech Republic
| | - Yangfan Lu
- College of Materials Science and Engineering, National Engineering Research Center for Magnesium Alloys, Chongqing University, Chongqing, 400044, China
| | - Giorgio Zoppellaro
- Regional Centre of Advanced Technologies and Materials, Czech Advanced Technology and Research Institute (CATRIN), Palacký University Olomouc, Šlechtitelů 27, Olomouc, 779 00, Czech Republic
| | - Ondřej Tomanec
- Regional Centre of Advanced Technologies and Materials, Czech Advanced Technology and Research Institute (CATRIN), Palacký University Olomouc, Šlechtitelů 27, Olomouc, 779 00, Czech Republic
| | - Michal Otyepka
- Regional Centre of Advanced Technologies and Materials, Czech Advanced Technology and Research Institute (CATRIN), Palacký University Olomouc, Šlechtitelů 27, Olomouc, 779 00, Czech Republic
- IT4Innovations, VŠB-Technical University of Ostrava, 17. listopadu 2172/15, Ostrava-Poruba, 708 00, Czech Republic
| | - Radek Zbořil
- Regional Centre of Advanced Technologies and Materials, Czech Advanced Technology and Research Institute (CATRIN), Palacký University Olomouc, Šlechtitelů 27, Olomouc, 779 00, Czech Republic
- Nanotechnology Centre, CEET, VŠB-Technical University of Ostrava, 17. listopadu 2172/15, Ostrava-Poruba, 708 00, Czech Republic
| | - Hideo Hosono
- Materials Research Centre for Element Strategy, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama, 226-8503, Japan
| | - Manoj B Gawande
- Regional Centre of Advanced Technologies and Materials, Czech Advanced Technology and Research Institute (CATRIN), Palacký University Olomouc, Šlechtitelů 27, Olomouc, 779 00, Czech Republic
- Department of Industrial and Engineering Chemistry Institute of Chemical Technology Mumbai-Marathwada Campus Jalna, Maharashtra, 431213, India
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11
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Kumar Verma A, Govind Rajan A. Surface Roughness Explains the Observed Water Contact Angle and Slip Length on 2D Hexagonal Boron Nitride. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:9210-9220. [PMID: 35866875 DOI: 10.1021/acs.langmuir.2c00972] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Hexagonal boron nitride (hBN) is a two-dimensional (2D) material that is currently being explored in a number of applications, such as atomically thin coatings, water desalination, and biological sensors. In many of these applications, the hBN surface comes into intimate contact with water. In this work, we investigate the wetting and frictional behavior of realistic 2D hBN surfaces with atomic-scale defects and roughness. We combine density functional theory calculations of the charge distribution inside hBN with free energy calculations using molecular dynamics simulations of the hBN-water interface. We find that the presence of surface roughness, but not that of vacancy defects, leads to remarkable agreement with the experimentally observed water contact angle of 66° on freshly synthesized, uncontaminated hBN. Not only that, the inclusion of surface roughness predicts with exceptional accuracy the experimental water slip length of ∼1 nm on hBN. Our results underscore the importance of considering realistic models of 2D materials with surface roughness while modeling nanomaterial-water interfaces in molecular simulations.
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Affiliation(s)
- Ashutosh Kumar Verma
- Department of Chemical Engineering, Indian Institute of Science, Bengaluru, Karnataka 560012, India
| | - Ananth Govind Rajan
- Department of Chemical Engineering, Indian Institute of Science, Bengaluru, Karnataka 560012, India
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12
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Yang S, Zhao X, Lu YH, Barnard ES, Yang P, Baskin A, Lawson JW, Prendergast D, Salmeron M. Nature of the Electrical Double Layer on Suspended Graphene Electrodes. J Am Chem Soc 2022; 144:13327-13333. [PMID: 35849827 PMCID: PMC9335527 DOI: 10.1021/jacs.2c03344] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/05/2022]
Abstract
![]()
The structure of interfacial water near suspended graphene
electrodes
in contact with aqueous solutions of Na2SO4,
NH4Cl, and (NH4)2SO4 has
been studied using confocal Raman spectroscopy, sum frequency vibrational
spectroscopy, and Kelvin probe force microscopy. SO42– anions were found to preferentially accumulate near
the interface at an open circuit potential (OCP), creating an electrical
field that orients water molecules below the interface, as revealed
by the increased intensity of the O–H stretching peak of H-bonded
water. No such increase is observed with NH4Cl at the OCP.
The intensity of the dangling O–H bond stretching peak however
remains largely unchanged. The degree of orientation of the water
molecules as well as the electrical double layer strength increased
further when positive voltages are applied. Negative voltages on the
other hand produced only small changes in the intensity of the H-bonded
water peaks but affected the intensity and frequency of dangling O–H
bond peaks. The TOC figure is an oversimplified representation of
the system in this work.
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Affiliation(s)
- Shanshan Yang
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Xiao Zhao
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States.,Department of Materials Science and Engineering, University of California, Berkeley, California 94720, United States
| | - Yi-Hsien Lu
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Edward S Barnard
- Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Peidong Yang
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States.,Department of Chemistry, University of California-Berkeley, Berkeley, California 94720, United States
| | - Artem Baskin
- Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States.,NASA Ames Research Center, Moffett Field, California 94035, United States
| | - John W Lawson
- NASA Ames Research Center, Moffett Field, California 94035, United States
| | - David Prendergast
- Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Miquel Salmeron
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States.,Department of Materials Science and Engineering, University of California, Berkeley, California 94720, United States
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13
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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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14
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Kim E, Kim D, Kwak K, Nagata Y, Bonn M, Cho M. Wettability of graphene, water contact angle, and interfacial water structure. Chem 2022. [DOI: 10.1016/j.chempr.2022.04.002] [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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15
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Zhang J, Jia K, Huang Y, Liu X, Xu Q, Wang W, Zhang R, Liu B, Zheng L, Chen H, Gao P, Meng S, Lin L, Peng H, Liu Z. Intrinsic Wettability in Pristine Graphene. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2022; 34:e2103620. [PMID: 34808008 DOI: 10.1002/adma.202103620] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Revised: 11/16/2021] [Indexed: 06/13/2023]
Abstract
The wettability of graphene remains controversial owing to its high sensitivity to the surroundings, which is reflected by the wide range of reported water contact angle (WCA). Specifically, the surface contamination and underlying substrate would strongly alter the intrinsic wettability of graphene. Here, the intrinsic wettability of graphene is investigated by measuring WCA on suspended, superclean graphene membrane using environmental scanning electron microscope. An extremely low WCA with an average value ≈30° is observed, confirming the hydrophilic nature of pristine graphene. This high hydrophilicity originates from the charge transfer between graphene and water molecules through H-π interaction. The work provides a deep understanding of the water-graphene interaction and opens up a new way for measuring the surface properties of 2D materials.
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Affiliation(s)
- Jincan Zhang
- Center for Nanochemistry, Beijing Science and Engineering Center for Nanocarbons, Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, P. R. China
- Beijing Graphene Institute, Beijing, 100095, P. R. China
- Department of Engineering, University of Cambridge, Cambridge, CB3 0FA, UK
- Academy for Advanced Interdisciplinary Studies, Peking University, Beijing, 100871, P. R. China
| | - Kaicheng Jia
- Center for Nanochemistry, Beijing Science and Engineering Center for Nanocarbons, Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, P. R. China
- Beijing Graphene Institute, Beijing, 100095, P. R. China
| | - Yongfeng Huang
- Songshan Lake Materials Laboratory, Dongguan, Guangdong, 523808, P. R. China
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, P. R. China
| | - Xiaoting Liu
- Center for Nanochemistry, Beijing Science and Engineering Center for Nanocarbons, Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, P. R. China
- Beijing Graphene Institute, Beijing, 100095, P. R. China
- Academy for Advanced Interdisciplinary Studies, Peking University, Beijing, 100871, P. R. China
| | - Qiuhao Xu
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, P. R. China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Wendong Wang
- Department of Physics and Astronomy, University of Manchester, Manchester, M13 9PL, UK
| | - Rui Zhang
- Department of Physics and Astronomy, University of Manchester, Manchester, M13 9PL, UK
| | - Bingyao Liu
- Beijing Graphene Institute, Beijing, 100095, P. R. China
- Academy for Advanced Interdisciplinary Studies, Peking University, Beijing, 100871, P. R. China
- Electron Microscopy Laboratory and International Center for Quantum Materials, School of Physics, Peking University, Beijing, 100871, P. R. China
| | - Liming Zheng
- Center for Nanochemistry, Beijing Science and Engineering Center for Nanocarbons, Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, P. R. China
- Beijing Graphene Institute, Beijing, 100095, P. R. China
| | - Heng Chen
- Center for Nanochemistry, Beijing Science and Engineering Center for Nanocarbons, Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, P. R. China
- Beijing Graphene Institute, Beijing, 100095, P. R. China
| | - Peng Gao
- Electron Microscopy Laboratory and International Center for Quantum Materials, School of Physics, Peking University, Beijing, 100871, P. R. China
- Collaborative Innovation Center of Quantum Matter, Beijing, 100871, P. R. China
| | - Sheng Meng
- Songshan Lake Materials Laboratory, Dongguan, Guangdong, 523808, P. R. China
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, P. R. China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Li Lin
- Materials Science and Engineering, National University of Singapore, Singapore, 119077, Singapore
| | - Hailin Peng
- Center for Nanochemistry, Beijing Science and Engineering Center for Nanocarbons, Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, P. R. China
- Beijing Graphene Institute, Beijing, 100095, P. R. China
| | - Zhongfan Liu
- Center for Nanochemistry, Beijing Science and Engineering Center for Nanocarbons, Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, P. R. China
- Beijing Graphene Institute, Beijing, 100095, P. R. China
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16
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Liu Z, Song Y, Rajappan A, Wang EN, Preston DJ. Temporal Evolution of Surface Contamination under Ultra-high Vacuum. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:1252-1258. [PMID: 35000388 DOI: 10.1021/acs.langmuir.1c03062] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Ultra-high vacuum (UHV) is essential to many surface characterization techniques and is often applied with the intention of reducing exposure to airborne contaminants. Surface contamination under UHV is not well-understood, however, and introduces uncertainty in surface elemental characterization or hinders surface-sensitive manufacturing approaches. In this work, we investigated the time-dependent surface composition of gold samples with different initial levels of contamination under UHV over a period of 24 h with both experiments and physical modeling. Our results show that surface hydrocarbon concentration under UHV can be explained by molecular adsorption-desorption competition theory. Gold surfaces that were initially pristine adsorbed hydrocarbons over time under UHV; conversely, surfaces that were initially heavily contaminated desorbed hydrocarbons over time. During both adsorption and desorption, the concentration of contaminants tended toward the same equilibrium value. This study provides a comprehensive evaluation of the temporal evolution of surface contamination under UHV and highlights routes to mitigate surface contamination effects.
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Affiliation(s)
- Zhen Liu
- Department of Mechanical Engineering, Rice University, 6100 Main Street, Houston, Texas 77005, United States
| | - Youngsup Song
- Department of Mechanical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - Anoop Rajappan
- Department of Mechanical Engineering, Rice University, 6100 Main Street, Houston, Texas 77005, United States
| | - Evelyn N Wang
- Department of Mechanical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - Daniel J Preston
- Department of Mechanical Engineering, Rice University, 6100 Main Street, Houston, Texas 77005, United States
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17
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Zhou J, Tian X, Wang B, Zhang S, Liu Z, Chen W. Application of Low Temperature Atomic Layer Deposition Packaging Technology in OLED and Its Implications for Organic and Perovskite Solar Cell Packaging. ACTA CHIMICA SINICA 2022. [DOI: 10.6023/a21110513] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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18
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Zhang J, Jia K, Huang Y, Wang Y, Liu N, Chen Y, Liu X, Liu X, Zhu Y, Zheng L, Chen H, Liang F, Zhang M, Duan X, Wang H, Lin L, Peng H, Liu Z. Hydrophilic, Clean Graphene for Cell Culture and Cryo-EM Imaging. NANO LETTERS 2021; 21:9587-9593. [PMID: 34734718 DOI: 10.1021/acs.nanolett.1c03344] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
The wettability of graphene is critical for numerous applications but is very sensitive to its surface cleanness. Herein, by clarifying the impact of intrinsic contamination, i.e., amorphous carbon, which is formed on the graphene surface during the high-temperature chemical vapor deposition (CVD) process, the hydrophilic nature of clean graphene grown on single-crystal Cu(111) substrate was confirmed by both experimental and theoretical studies, with an average water contact angle of ∼23°. Furthermore, the wettability of as-transferred graphene was proven to be highly dependent on its intrinsic cleanness, because of which the hydrophilic, clean graphene exhibited improved performance when utilized for cell culture and cryoelectron microscopy imaging. This work not only validates the intrinsic hydrophilic nature of graphene but also provides a new insight in developing advanced bioapplications using CVD-grown clean graphene films.
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Affiliation(s)
- Jincan Zhang
- Center for Nanochemistry, Beijing Science and Engineering Center for Nanocarbons, Beijing National Laboratory for Molecular Science, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, P. R. China
- Beijing Graphene Institute, Beijing 100095, P. R. China
- Academy for Advanced Interdisciplinary Studies, Peking University, Beijing 100871, P. R. China
- Department of Engineering, University of Cambridge, Cambridge CB3 0FA, U.K
| | - Kaicheng Jia
- Center for Nanochemistry, Beijing Science and Engineering Center for Nanocarbons, Beijing National Laboratory for Molecular Science, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, P. R. China
- Beijing Graphene Institute, Beijing 100095, P. R. China
| | - Yongfeng Huang
- Songshan Lake Materials Laboratory, Dongguan, Guangdong 523808, P. R. China
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, P. R. China
| | - Yanan Wang
- Songshan Lake Materials Laboratory, Dongguan, Guangdong 523808, P. R. China
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, P. R. China
| | - Nan Liu
- Ministry of Education Key Laboratory of Protein Sciences, Beijing Advanced Innovation Center for Structural Biology, School of Life Sciences and Tsinghua-Peking Joint Center for Life Sciences, Tsinghua University, Beijing 100084, P. R. China
| | - Yanan Chen
- Ministry of Education Key Laboratory of Protein Sciences, Beijing Advanced Innovation Center for Structural Biology, School of Life Sciences and Tsinghua-Peking Joint Center for Life Sciences, Tsinghua University, Beijing 100084, P. R. China
| | - Xiaoting Liu
- Center for Nanochemistry, Beijing Science and Engineering Center for Nanocarbons, Beijing National Laboratory for Molecular Science, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, P. R. China
- Beijing Graphene Institute, Beijing 100095, P. R. China
- Academy for Advanced Interdisciplinary Studies, Peking University, Beijing 100871, P. R. China
| | - Xiaojun Liu
- College of Future Technology, Peking University, Beijing 100871, P. R. China
| | - Yeshu Zhu
- Center for Nanochemistry, Beijing Science and Engineering Center for Nanocarbons, Beijing National Laboratory for Molecular Science, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, P. R. China
- Beijing Graphene Institute, Beijing 100095, P. R. China
- Academy for Advanced Interdisciplinary Studies, Peking University, Beijing 100871, P. R. China
| | - Liming Zheng
- Center for Nanochemistry, Beijing Science and Engineering Center for Nanocarbons, Beijing National Laboratory for Molecular Science, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, P. R. China
- Beijing Graphene Institute, Beijing 100095, P. R. China
| | - Heng Chen
- Center for Nanochemistry, Beijing Science and Engineering Center for Nanocarbons, Beijing National Laboratory for Molecular Science, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, P. R. China
- Beijing Graphene Institute, Beijing 100095, P. R. China
| | - Fushun Liang
- Center for Nanochemistry, Beijing Science and Engineering Center for Nanocarbons, Beijing National Laboratory for Molecular Science, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, P. R. China
- Beijing Graphene Institute, Beijing 100095, P. R. China
- Academy for Advanced Interdisciplinary Studies, Peking University, Beijing 100871, P. R. China
| | - Mengqi Zhang
- Beijing Graphene Institute, Beijing 100095, P. R. China
| | - Xiaojie Duan
- College of Future Technology, Peking University, Beijing 100871, P. R. China
| | - Hongwei Wang
- Ministry of Education Key Laboratory of Protein Sciences, Beijing Advanced Innovation Center for Structural Biology, School of Life Sciences and Tsinghua-Peking Joint Center for Life Sciences, Tsinghua University, Beijing 100084, P. R. China
| | - Li Lin
- Materials Science and Engineering, National University of Singapore, 119077, Singapore
| | - Hailin Peng
- Center for Nanochemistry, Beijing Science and Engineering Center for Nanocarbons, Beijing National Laboratory for Molecular Science, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, P. R. China
- Beijing Graphene Institute, Beijing 100095, P. R. China
| | - Zhongfan Liu
- Center for Nanochemistry, Beijing Science and Engineering Center for Nanocarbons, Beijing National Laboratory for Molecular Science, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, P. R. China
- Beijing Graphene Institute, Beijing 100095, P. R. China
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19
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Chang W, Peng B, Egab K, Zhang Y, Cheng Y, Li X, Ma X, Li C. Few-layer graphene on nickel enabled sustainable dropwise condensation. Sci Bull (Beijing) 2021; 66:1877-1884. [PMID: 36654397 DOI: 10.1016/j.scib.2021.06.006] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2021] [Revised: 04/25/2021] [Accepted: 05/24/2021] [Indexed: 01/20/2023]
Abstract
Condensation is critical for a wide range of applications such as electrical power generation, distillation, natural gas processing, dehumidification and water harvest, and thermal management. Compared with "filmwise" mode of condensation (FWC) prevailing in industrial-scale systems, dropwise condensation (DWC) can provide an order of magnitude higher heat transfer rate owing to drastically reduced thermal resistance from the formation of discrete and mobile droplets. In the past, promoting DWC by controlling surface wetting has attracted wide attention, but DWC highly relies on non-wetting surfaces and only lasts days under practical conditions due to the poor reliability of coatings. Here, we developed nanostructured graphene coatings on nickel (Ni) substrates that we can control and enhance the nucleation of water droplets on graphene grain boundaries. Surprisingly, this enables DWC even under normal "wetting" conditions. This is contradictory to the widely accepted DWC mechanism. Moreover, the Ni-graphene surface enables exceptional long-term condensation from days to more than 3 years under practical or even more aggressive testing environments.
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Affiliation(s)
- Wei Chang
- Department of Mechanical Engineering, University of South Carolina, Columbia, SC 29208, USA
| | - Benli Peng
- Department of Mechanical Engineering, University of South Carolina, Columbia, SC 29208, USA; Naval Architecture and Ocean Engineering College, Dalian Maritime University, Dalian 116026, China
| | - Karim Egab
- Department of Mechanical Engineering, University of South Carolina, Columbia, SC 29208, USA
| | - Yunya Zhang
- Department of Mechanical and Aerospace Engineering, University of Virginia, Charlottesville, VA 22904, USA
| | - Yaqi Cheng
- State Key Laboratory of Fine Chemicals, Liaoning Provincial Key Laboratory of Clean Utilization of Chemical Resources, Institute of Chemical Engineering, Dalian University of Technology, Dalian 116024, China
| | - Xiaodong Li
- Department of Mechanical and Aerospace Engineering, University of Virginia, Charlottesville, VA 22904, USA
| | - Xuehu Ma
- State Key Laboratory of Fine Chemicals, Liaoning Provincial Key Laboratory of Clean Utilization of Chemical Resources, Institute of Chemical Engineering, Dalian University of Technology, Dalian 116024, China
| | - Chen Li
- Department of Mechanical Engineering, University of South Carolina, Columbia, SC 29208, USA.
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20
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Korczeniewski E, Bryk P, Koter S, Kowalczyk P, Kujawski W, Kujawa J, Terzyk AP. Revisiting Wetting, Freezing, and Evaporation Mechanisms of Water on Copper. ACS APPLIED MATERIALS & INTERFACES 2021; 13:37893-37903. [PMID: 34319693 PMCID: PMC8397239 DOI: 10.1021/acsami.1c09733] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/26/2021] [Accepted: 07/19/2021] [Indexed: 06/13/2023]
Abstract
Wetting of metal surfaces plays an important role in fuel cells, corrosion science, and heat-transfer devices. It has been recently stipulated that Cu surface is hydrophobic. In order to address this issue we use high purity (1 1 1) Cu prepared without oxygen, and resistant to oxidation. Using the modern Fringe Projection Phase-Shifting method of surface roughness determination, together with a new cell allowing the vacuum and thermal desorption of samples, we define the relation between the copper surface roughness and water contact angle (WCA). Next by a simple extrapolation, we determine the WCA for the perfectly smooth copper surface (WCA = 34°). Additionally, the kinetics of airborne hydrocarbons adsorption on copper was measured. It is shown for the first time that the presence of surface hydrocarbons strongly affects not only WCA, but also water droplet evaporation and the temperature of water droplet freezing. The different behavior and features of the surfaces were observed once the atmosphere of the experiment was changed from argon to air. The evaporation results are well described by the theoretical framework proposed by Semenov, and the freezing process by the dynamic growth angle model.
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Affiliation(s)
- Emil Korczeniewski
- Faculty
of Chemistry, Physicochemistry of Carbon Materials Research Group, Nicolaus Copernicus University in Toruń, Gagarina Street 7, 87-100 Toruń, Poland
| | - Paweł Bryk
- Faculty
of Chemistry, Chair of Theoretical Chemistry, Maria Curie - Skłodowska University, 20−031 Lublin, Poland
| | - Stanisław Koter
- Faculty
of Chemistry, Department of Physical Chemistry and Physical Chemistry
of Polymers, Nicolaus Copernicus University
in Toruń, Gagarina
Street 7, 87-100 Toruń, Poland
| | - Piotr Kowalczyk
- College
of Science, Health, Engineering and Education, Murdoch University, Perth, Western Australia 6150, Australia
| | - Wojciech Kujawski
- Faculty
of Chemistry, Department of Physical Chemistry and Physical Chemistry
of Polymers, Nicolaus Copernicus University
in Toruń, Gagarina
Street 7, 87-100 Toruń, Poland
| | - Joanna Kujawa
- Faculty
of Chemistry, Department of Physical Chemistry and Physical Chemistry
of Polymers, Nicolaus Copernicus University
in Toruń, Gagarina
Street 7, 87-100 Toruń, Poland
| | - Artur P. Terzyk
- Faculty
of Chemistry, Physicochemistry of Carbon Materials Research Group, Nicolaus Copernicus University in Toruń, Gagarina Street 7, 87-100 Toruń, Poland
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21
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Pitchiya AP, Le NT, Putnam ZA, Harrington M, Krishnan S. Microporous Graphite Composites of Tailorable Porosity, Surface Wettability, and Water Permeability for Fuel Cell Bipolar Plates. Ind Eng Chem Res 2021. [DOI: 10.1021/acs.iecr.1c01737] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Aswin Prathap Pitchiya
- Department of Chemical and Biomolecular Engineering, Clarkson University, Potsdam, New York 13699, United States
| | - Ngoc-Tram Le
- Department of Chemical and Biomolecular Engineering, Clarkson University, Potsdam, New York 13699, United States
| | - Zackary A. Putnam
- Department of Chemical and Biomolecular Engineering, Clarkson University, Potsdam, New York 13699, United States
- Materials Science and Engineering Ph.D. Program, Clarkson University, Potsdam, New York 13699, United States
| | | | - Sitaraman Krishnan
- Department of Chemical and Biomolecular Engineering, Clarkson University, Potsdam, New York 13699, United States
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22
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Broadhead EJ, Monroe A, Tibbetts KM. Deposition of Cubic Copper Nanoparticles on Silicon Laser-Induced Periodic Surface Structures via Reactive Laser Ablation in Liquid. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:3740-3750. [PMID: 33740377 DOI: 10.1021/acs.langmuir.1c00238] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
We report the deposition of cubic copper nanoparticles (Cu NPs) of varying size and particle density on silicon laser-induced periodic surface structures via reactive laser ablation in liquid (RLAL) using intense femtosecond laser pulses. Two syntheses were compared: (1) simultaneous deposition, wherein a silicon wafer was laser-processed in aqueous Cu(NO3)2 solution and (2) sequential deposition, wherein the silicon wafer was laser-processed in water and then exposed to aqueous Cu(NO3)2. Only simultaneous deposition resulted in high Cu loading and cubic Cu NPs deposited on the surface. The solution pH, Cu(NO3)2 concentration, and sample translation rate were varied to determine their effects on the size, morphology, and density of Cu NPs. Solution pH near ∼6.8 maximized Cu deposition. The Cu(NO3)2 concentration affected the Cu NP morphology but not the size or Cu loading. The sample translation rate most significantly affected the Cu loading, particle size, and particle density. The observed synthesis parameter dependence of these Cu NP properties resembles results by electrodeposition to grow Cu NPs on silicon surfaces, which suggests that Cu NP deposition by RLAL follows a mechanism similar to electrodeposition.
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Affiliation(s)
- Eric J Broadhead
- Department of Chemistry, Virginia Commonwealth University, Richmond, Virginia 23284, United States
| | - Avery Monroe
- Department of Chemistry, Virginia Commonwealth University, Richmond, Virginia 23284, United States
| | - Katharine Moore Tibbetts
- Department of Chemistry, Virginia Commonwealth University, Richmond, Virginia 23284, United States
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23
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Goikuria U, Larrañaga A, Lizundia E, Vilas JL. Effect of metal‐oxide nanoparticle presence and alginate cross‐linking on cellulose nanocrystal‐based aerogels. J Appl Polym Sci 2021. [DOI: 10.1002/app.50639] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Uribarri Goikuria
- Macromolecular Chemistry Research Group (LABQUIMAC), Department of Physical Chemistry, Faculty of Science and Technology University of the Basque Country (UPV/EHU) Leioa Spain
| | - Aitor Larrañaga
- SGIker, General Research Services University of the Basque Country (UPV/EHU) Leioa Spain
| | - Erlantz Lizundia
- Department of Graphic Design and Engineering Projects, Bilbao Faculty of Engineering University of the Basque Country (UPV/EHU) Bilbao Spain
- BCMaterials, Basque Center for Materials, Applications and Nanostructures UPV/EHU Science Park Leioa Spain
| | - José Luis Vilas
- Macromolecular Chemistry Research Group (LABQUIMAC), Department of Physical Chemistry, Faculty of Science and Technology University of the Basque Country (UPV/EHU) Leioa Spain
- BCMaterials, Basque Center for Materials, Applications and Nanostructures UPV/EHU Science Park Leioa Spain
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Fang L, Liu K, Li F, Zeng W, Hong Z, Xu L, Shi Q, Ma Y. New insights into stoichiometric efficiency and synergistic mechanism of persulfate activation by zero-valent bimetal (Iron/Copper) for organic pollutant degradation. JOURNAL OF HAZARDOUS MATERIALS 2021; 403:123669. [PMID: 33264873 DOI: 10.1016/j.jhazmat.2020.123669] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Revised: 08/01/2020] [Accepted: 08/04/2020] [Indexed: 06/12/2023]
Abstract
Extensive studies have been devoting to investigating the catalytic efficiency of zero-valent iron (Fe0)-based bimetals with persulfate (PS), while little is known in the stoichiometric efficiency, underlying mechanisms and reaction center of zero-valent bimetallic catalysts in activating PS. Herein, nanoscale zero-valent Fe/Cu catalysts in decomposing 2,4-dichlorophenol (DCP) have been investigated. The results show that the increase of Cu ratio from 0 to 0.75 significantly enhances the DCP degradation with a rate constant of 0.025 min-1 for Fe0 to 0.097 min-1 for Fe/Cu(0.75) at pH ∼3.3, indicating Cu is likely the predominate reaction centers over Fe. The PS decomposition is reduced with the increase of Cu ratios, suggesting the stoichiometric efficiency of Fe/Cu in activating PS is notably enhanced from 0.024 for Fe0 to 0.11 for Fe/Cu(0.75). Analyses indicate Cu atoms are likely the predominant reaction site for DCP decomposition, and Fe atoms synergistically enhance the activity of Cu as indicated by DFT calculations. Both SO4⦁- and ⦁OH radicals are responsible for reactions, and the contribution of SO4⦁- is decreased at higher pH conditions. The findings of this work provide insight into the stoichiometric efficiency and the reaction center of Fe/Cu catalysts to activate PS for pollutant removals.
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Affiliation(s)
- Liping Fang
- Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Guangdong Institute of Eco-environmental Science & Technology, Guangdong Academy of Sciences, Guangzhou, 510650, China; National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangzhou, 510650, China
| | - Kai Liu
- Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Guangdong Institute of Eco-environmental Science & Technology, Guangdong Academy of Sciences, Guangzhou, 510650, China; National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangzhou, 510650, China
| | - Fangbai Li
- Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Guangdong Institute of Eco-environmental Science & Technology, Guangdong Academy of Sciences, Guangzhou, 510650, China; National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangzhou, 510650, China.
| | - Wenbin Zeng
- Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Guangdong Institute of Eco-environmental Science & Technology, Guangdong Academy of Sciences, Guangzhou, 510650, China; National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangzhou, 510650, China
| | - Zebin Hong
- Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Guangdong Institute of Eco-environmental Science & Technology, Guangdong Academy of Sciences, Guangzhou, 510650, China; National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangzhou, 510650, China
| | - Ling Xu
- Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Guangdong Institute of Eco-environmental Science & Technology, Guangdong Academy of Sciences, Guangzhou, 510650, China; National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangzhou, 510650, China
| | - Qiantao Shi
- Center for Environmental Systems, Stevens Institute of Technology, Hoboken, New Jersey, 07030, United States
| | - Yibing Ma
- Macao Environmental Research Institute, Macau University of Science and Technology, Taipa, Macao, China
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Wang Y, Xue Y, Zhang C. Copper embedded in nitrogen-doped carbon matrix derived from metal-organic frameworks for boosting peroxide production and electro-Fenton catalysis. Electrochim Acta 2021. [DOI: 10.1016/j.electacta.2020.137643] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Liu Z, Hossain MN, Wen J, Chen A. Copper decorated with nanoporous gold by galvanic displacement acts as an efficient electrocatalyst for the electrochemical reduction of CO 2. NANOSCALE 2021; 13:1155-1163. [PMID: 33400750 DOI: 10.1039/d0nr08138h] [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
The reduction of carbon dioxide (CO2) is recognized as a key component in the synthesis of renewable carbon-containing fuels. Herein, we report on nanoporous gold (NPAu) decorated with copper atoms for the efficient electrochemical reduction of CO2. A facile and green galvanic displacement technique was developed to incorporate Cu onto the surface of the nanoporous gold-zinc (NPAuZn) electrode. The effect of zinc on the morphology and electrochemical performance of the formed NPAuCu electrodes for CO2 reduction was systematically investigated. The NPAuCu electrode exhibited 16.9 and 2.86 times higher current density than those of polycrystalline gold and NPAuZn at -0.60 V (vs. RHE) in a 0.1 M CO2-saturated NaHCO3 solution, respectively. A far higher faradaic efficiency was achieved at the NPAuCu electrode for the electrochemical reduction of CO2 to CO, CH4 and HCOOH. The facile synthesis of the NPAuCu electrode demonstrated in the present study can be employed as a promising strategy in the development of high-performance electrocatalysts for energy and environmental applications.
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Affiliation(s)
- Zhonggang Liu
- Electrochemical Technology Centre, Department of Chemistry, University of Guelph, 50 Stone Road East, Guelph, Ontario N1G 2 W1, Canada. and Institutes of Physical Science and Information Technology, Anhui University, 111 Jiulong Road, Hefei, Anhui 230601, P. R. China
| | - M Nur Hossain
- Electrochemical Technology Centre, Department of Chemistry, University of Guelph, 50 Stone Road East, Guelph, Ontario N1G 2 W1, Canada.
| | - Jiali Wen
- Electrochemical Technology Centre, Department of Chemistry, University of Guelph, 50 Stone Road East, Guelph, Ontario N1G 2 W1, Canada.
| | - Aicheng Chen
- Electrochemical Technology Centre, Department of Chemistry, University of Guelph, 50 Stone Road East, Guelph, Ontario N1G 2 W1, Canada.
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Tortora M, Meloni S, Tan BH, Giacomello A, Ohl CD, Casciola CM. The interplay among gas, liquid and solid interactions determines the stability of surface nanobubbles. NANOSCALE 2020; 12:22698-22709. [PMID: 33169778 DOI: 10.1039/d0nr05859a] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Surface nanobubbles are gaseous domains found at immersed substrates, whose remarkable persistence is still not fully understood. Recently, it has been observed that the formation of nanobubbles is often associated with a local high gas oversaturation at the liquid-solid interface. Tan, An and Ohl have postulated the existence of an effective potential attracting the dissolved gas to the substrate and producing a local oversaturation within 1 nm from it that can stabilize nanobubbles by preventing outgassing in the region where gas flow would be maximum. It is this effective solid-gas potential - which is not the intrinsic, mechanical interaction between solid and gas atoms - its dependence on chemical and physical characteristics of the substrate, gas and liquid, that controls the stability and the other characteristics of surface nanobubbles. Here, we perform free energy atomistic calculations to determine, for the first time, the effective solid-gas interaction that allows us to identify the molecular origin of the stability and other properties of surface nanobubbles. By combining the Tan-An-Ohl model and the present results, we provide a comprehensive theoretical framework allowing, among others, the interpretation of recent unexplained experimental results, such as the stability of surface nanobubbles in degassed liquids, the very high gas concentration in the liquid surrounding nanobubbles, and nanobubble instability in organic solvents with high gas solubility.
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Affiliation(s)
- Marco Tortora
- Dipartimento di Ingegneria Meccanica e Aerospaziale, Università di Roma La Sapienza, Via Eudossiana 18, 00184 Roma, Italy.
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Chen X, Yang Z, Feng S, Golbek TW, Xu W, Butt HJ, Weidner T, Xu Z, Hao J, Wang Z. How Universal Is the Wetting Aging in 2D Materials. NANO LETTERS 2020; 20:5670-5677. [PMID: 32579374 DOI: 10.1021/acs.nanolett.0c00855] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Previous studies indicate that 2D materials such as graphene, WS2, and MoS2 deposited on oxidized silicon substrate are susceptible to aging due to the adsorption of airborne contamination. As a result, their surfaces become more hydrophobic. However, it is not clear how ubiquitous such a hydrophobization is, and the interplay between the specific adsorbed species and resultant wetting aging remains elusive. Here, we report a pronounced and general hydrophilic-to-hydrophobic wetting aging on 2D InSe films, which is independent of the substrates to synthesize these films (silicon, glass, nickel, copper, aluminum oxide), though the extent of wetting aging is sensitive to the layer of films. Our findings are ascribed to the occurrence and enrichment of airborne contamination that contains alkyl chains. Our results also suggest that the wetting aging effect might be universal to a wide range of 2D materials.
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Affiliation(s)
- Xuan Chen
- Department of Mechanical Engineering, City University of Hong Kong, Hong Kong 999077, China
| | - Zhibin Yang
- Department of Applied Physics, The Hong Kong Polytechnic University, Hong Kong 999077, China
| | - Shizhe Feng
- Applied Mechanics Laboratory, Department of Engineering Mechanics and Center for Nano and Micro Mechanics, Tsinghua University, Beijing 100084, China
| | | | - Wanghuai Xu
- Department of Mechanical Engineering, City University of Hong Kong, Hong Kong 999077, China
| | | | - Tobias Weidner
- Department of Chemistry, Aarhus University, Aarhus 8000, Denmark
| | - Zhiping Xu
- Applied Mechanics Laboratory, Department of Engineering Mechanics and Center for Nano and Micro Mechanics, Tsinghua University, Beijing 100084, China
| | - Jianhua Hao
- Department of Applied Physics, The Hong Kong Polytechnic University, Hong Kong 999077, China
| | - Zuankai Wang
- Department of Mechanical Engineering, City University of Hong Kong, Hong Kong 999077, China
- Shenzhen Research Institute of City University of Hong Kong, Shenzhen 518057, China
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Costa MCF, Parra GG, G Larrudé DR, Fechine GJM. Screening effect of CVD graphene on the surface free energy of substrates. Phys Chem Chem Phys 2020; 22:16672-16680. [PMID: 32658238 DOI: 10.1039/d0cp01453b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The wettability of graphene has been a topic under constant discussion in the literature since 2012. In this work we measured the contact angle (CA) of six different types of substrates (glass, quartz, Si3N4, Si/SiO2, sapphire and Si) with varying dielectric constants and surface roughnesses in order to calculate the surface free energy of graphene films to evaluate how the wetting properties of graphene-coated substrates are changed according to the underlying substrate. We used a residual-free transfer process to remove the high-quality graphene (CVD-Gr) grown onto copper foil. Afterwards, we performed an inert thermal treatment (Ar, at 300 °C for 30 minutes) to remove airborne contaminants from the graphene surface and evaluate the roughness of substrates by atomic force microscopy, the advancing and receding contact angles of two liquids (water and ethylene glycol), hysteresis, and surface free energy (polar and dispersive components) calculations. The presence of high-quality monolayer graphene (free of any air contaminants, polymer residues, etc.) led to a common wettability behaviour for all coated surfaces, regardless of the nature of the underlying substrate. This result can be understood in terms of the screening of van der Waals and dipole interactions by the electrons in graphene.
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Affiliation(s)
- Mariana C F Costa
- Mackenzie Institute for Research in Graphene and Nanotechnologies - MackGraphe, Mackenzie Presbyterian University, Rua da Consolação, 896, São Paulo - SP, 01302-907, Brazil.
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Korczeniewski E, Zięba M, Zięba W, Kolanowska A, Bolibok P, Kowalczyk P, Wiertel-Pochopień A, Zawała J, Boncel S, Terzyk AP. Electrophoretic Deposition of Layer-by-Layer Unsheathed Carbon Nanotubes-A Step Towards Steerable Surface Roughness and Wettability. MATERIALS (BASEL, SWITZERLAND) 2020; 13:E595. [PMID: 32012828 PMCID: PMC7040799 DOI: 10.3390/ma13030595] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/23/2019] [Revised: 01/09/2020] [Accepted: 01/23/2020] [Indexed: 02/04/2023]
Abstract
It is well known that carbon nanotube (CNT) oxidation (usually with concentrated HNO3) is a major step before the electrophoretic deposition (EPD). However, the recent discovery of the "onion effect" proves that multiwalled carbon nanotubes are not only oxidized, but a simultaneous unsheathing process occurs. We present the first report concerning the influence of unsheathing on the properties of the thus-formed CNT surface layer. In our study we examine how the process of gradual oxidation/unsheathing of a series of multiwalled carbon nanotubes (MWCNTs) influences the morphology of the surface formed via EPD. Taking a series of well-characterized and gradually oxidized/unsheathing Nanocyl MWCNTs and performing EPD on a carbon fiber surface, we analyzed the morphology and wettability of the CNT surfaces. Our results show that the water contact angle could be gradually changed in a wide range (125-163°) and the major property determining its value was the diameter of aggregates formed before the deposition process in the solvent. Based on the obtained results we determined the parameters having a crucial influence on the morphology of created layers. Our results shed new light on the deposition mechanism and enable the preparation of surfaces with steerable roughness and wettability.
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Affiliation(s)
- Emil Korczeniewski
- Faculty of Chemistry, Physicochemistry of Carbon Materials Research Group, Nicolaus Copernicus University in Toruń, Gagarin Street 7, 87-100 Toruń, Poland; (E.K.); (M.Z.); (W.Z.); (P.B.)
| | - Monika Zięba
- Faculty of Chemistry, Physicochemistry of Carbon Materials Research Group, Nicolaus Copernicus University in Toruń, Gagarin Street 7, 87-100 Toruń, Poland; (E.K.); (M.Z.); (W.Z.); (P.B.)
| | - Wojciech Zięba
- Faculty of Chemistry, Physicochemistry of Carbon Materials Research Group, Nicolaus Copernicus University in Toruń, Gagarin Street 7, 87-100 Toruń, Poland; (E.K.); (M.Z.); (W.Z.); (P.B.)
| | - Anna Kolanowska
- Department of Organic Chemistry, Bioorganic Chemistry and Biotechnology, Silesian University of Technology, Krzywoustego 4, 44-100 Gliwice, Poland; (A.K.); (S.B.)
| | - Paulina Bolibok
- Faculty of Chemistry, Physicochemistry of Carbon Materials Research Group, Nicolaus Copernicus University in Toruń, Gagarin Street 7, 87-100 Toruń, Poland; (E.K.); (M.Z.); (W.Z.); (P.B.)
| | - Piotr Kowalczyk
- College of Science, Health, Engineering and Education, Murdoch University, Perth, WA 6150, Australia;
| | - Agata Wiertel-Pochopień
- Jerzy Haber Institute of Catalysis and Surface Chemistry Polish Academy of Sciences, ul. Niezapominajek 8, 30-239 Kraków, Poland; (A.W.-P.); (J.Z.)
| | - Jan Zawała
- Jerzy Haber Institute of Catalysis and Surface Chemistry Polish Academy of Sciences, ul. Niezapominajek 8, 30-239 Kraków, Poland; (A.W.-P.); (J.Z.)
| | - Sławomir Boncel
- Department of Organic Chemistry, Bioorganic Chemistry and Biotechnology, Silesian University of Technology, Krzywoustego 4, 44-100 Gliwice, Poland; (A.K.); (S.B.)
| | - Artur P. Terzyk
- Faculty of Chemistry, Physicochemistry of Carbon Materials Research Group, Nicolaus Copernicus University in Toruń, Gagarin Street 7, 87-100 Toruń, Poland; (E.K.); (M.Z.); (W.Z.); (P.B.)
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31
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McWilliams S, Flynn CD, McWilliams J, Arnold DC, Wahyuono RA, Undisz A, Rettenmayr M, Ignaszak A. Nanostructured Cu 2O Synthesized via Bipolar Electrochemistry. NANOMATERIALS (BASEL, SWITZERLAND) 2019; 9:E1781. [PMID: 31847448 PMCID: PMC6956072 DOI: 10.3390/nano9121781] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/22/2019] [Revised: 12/11/2019] [Accepted: 12/12/2019] [Indexed: 12/03/2022]
Abstract
Cuprous oxide (Cu2O) was synthesized for the first time via an open bipolar electrochemistry (BPE) approach and characterized in parallel with the commercially available material. As compared to the reference, Cu2O formed through a BPE reaction demonstrated a decrease in particle size; an increase in photocurrent; more efficient light scavenging; and structure-correlated changes in the flat band potential and charge carrier concentration. More importantly, as-synthesized oxides were all phase-pure, defect-free, and had an average crystallite size of 20 nm. Ultimately, this study demonstrates the impact of reaction conditions (e.g., applied potential, reaction time) on structure, morphology, surface chemistry, and photo-electrochemical activity of semiconducting oxides, and at the same time, the ability to maintain a green synthetic protocol and potentially create a scalable product. In the proposed BPE synthesis, we introduced a common food supplement (potassium gluconate) as a reducing and complexing agent, and as an electrolyte, allowing us to replace the more harmful reactants that are conventionally used in Cu2O production. In addition, in the BPE process very corrosive reactants, such as hydroxides and metal precursors (required for synthesis of oxides), are generated in situ in stoichiometric quantity, providing an alternative methodology to generate various nanostructured materials in high yields under mild conditions.
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Affiliation(s)
- Steven McWilliams
- Department of Chemistry, University of New Brunswick, Fredericton, NB E3B 5A3, Canada; (S.M.); (C.D.F.)
| | - Connor D. Flynn
- Department of Chemistry, University of New Brunswick, Fredericton, NB E3B 5A3, Canada; (S.M.); (C.D.F.)
| | - Jennifer McWilliams
- Department of Psychology, University of New Brunswick, Fredericton, NB E3B 5A3, Canada;
| | - Donna C. Arnold
- School of Physical Sciences, University of Kent, Canterbury CT2 7NH, UK;
| | - Ruri Agung Wahyuono
- Institute for Physical Chemistry and Abbe Center of Photonics, Friedrich-Schiller-Universität, 07743 Jena, Germany;
| | - Andreas Undisz
- Otto Schott Institute of Materials Research, Chair of Metallic Materials, Friedrich-Schiller-Universität, 07743 Jena, Germany; (A.U.); (M.R.)
| | - Markus Rettenmayr
- Otto Schott Institute of Materials Research, Chair of Metallic Materials, Friedrich-Schiller-Universität, 07743 Jena, Germany; (A.U.); (M.R.)
| | - Anna Ignaszak
- Department of Chemistry, University of New Brunswick, Fredericton, NB E3B 5A3, Canada; (S.M.); (C.D.F.)
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Kinoshita T, Maruyama S, Matsumoto Y. Ionic liquid wettability of CVD-grown graphene on Cu/α-Al2O3(0 0 0 1) characterized by in situ contact angle measurement in a vacuum. Chem Phys Lett 2019. [DOI: 10.1016/j.cplett.2019.136781] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Kim J, Choi W, Park JW, Kim C, Kim M, Song H. Branched Copper Oxide Nanoparticles Induce Highly Selective Ethylene Production by Electrochemical Carbon Dioxide Reduction. J Am Chem Soc 2019; 141:6986-6994. [PMID: 30964296 DOI: 10.1021/jacs.9b00911] [Citation(s) in RCA: 119] [Impact Index Per Article: 23.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
For long-term storage of renewable energy, the electrochemical carbon dioxide reduction reaction (CO2RR) offers a promising option for converting electricity to permanent forms of chemical energy. In this work, we present highly selective ethylene production dependent upon the catalyst morphology using copper oxide nanoparticles. The branched CuO nanoparticles were synthesized and then deposited on conductive carbon materials. After activation, the major copper species changed to Cu+, and the resulting electrocatalyst exhibited a high Faradaic efficiency (FE) of ethylene reaching over 70% and a hydrogen FE of 30% without any byproducts in a neutral aqueous solution. The catalyst also showed high durability (up to 12 h) with the ethylene FE over 65%. Compared to cubic morphology, the initial branched copper oxide structure formed highly active domains with interfaces and junctions in-between during activation, which caused large surface area with high local pH leading to high selectivity and activity for ethylene production.
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Affiliation(s)
- Jinmo Kim
- Department of Chemistry , Korea Advanced Institute of Science and Technology , Daejeon 34141 , Republic of Korea
| | - Woong Choi
- Department of Chemistry , Korea Advanced Institute of Science and Technology , Daejeon 34141 , Republic of Korea
| | - Joon Woo Park
- Department of Chemistry , Korea Advanced Institute of Science and Technology , Daejeon 34141 , Republic of Korea
| | - Cheonghee Kim
- Department of Chemical Engineering , Technical University of Berlin , Straße des 17. Juni 135 , 10623 Berlin , Germany
| | - Minjun Kim
- Department of Chemistry , Korea Advanced Institute of Science and Technology , Daejeon 34141 , Republic of Korea
| | - Hyunjoon Song
- Department of Chemistry , Korea Advanced Institute of Science and Technology , Daejeon 34141 , Republic of Korea.,Center for Nanomaterials and Chemical Reactions , Institute for Basic Science (IBS) , Daejeon 34141 , Republic of Korea
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Gomasang P, Kawahara K, Yasuraoka K, Maruyama M, Ago H, Okada S, Ueno K. A novel graphene barrier against moisture by multiple stacking large-grain graphene. Sci Rep 2019; 9:3777. [PMID: 30846794 PMCID: PMC6405749 DOI: 10.1038/s41598-019-40534-5] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2018] [Accepted: 02/15/2019] [Indexed: 11/26/2022] Open
Abstract
The moisture barrier properties of stacked graphene layers on Cu surfaces were investigated with the goal of improving the moisture barrier efficiency of single-layer graphene (SLG) for Cu metallization. SLG with large grain size were stacked on Cu surfaces coated with CVD-SLG to cover the grain-boundaries and defective areas of the underneath SLG film, which was confirmed to be oxidized by Raman spectroscopy measurements. To evaluate the humidity resistance of the graphene-coated Cu surfaces, temperature humidity storage (THS) testing was conducted under accelerated oxidation conditions (85 °C and 85% relative humidity) for 100 h. The color changes of the Cu surfaces during THS testing were observed by optical microscopy, while the oxidized Cu into Cu2O and CuO was detected by X-ray photoelectron spectroscopy (XPS). The experimental results were accord with the results of first-principle simulation for the energetic barrier against water diffusion through the stacked graphene layers with different overlap. The results demonstrate the efficiency of SLG stacking approach against moisture for Cu metallization.
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Affiliation(s)
- Ploybussara Gomasang
- Graduate School of Engineering and Science, Shibaura Institute of Technology, Koto, Tokyo, 135-8548, Japan
| | - Kenji Kawahara
- Global Innovation Center, Kyushu University, Kasuga, Fukuoka, 816-8580, Japan
| | - Kenta Yasuraoka
- Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki, 305-8577, Japan
| | - Mina Maruyama
- Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki, 305-8577, Japan
| | - Hiroki Ago
- Global Innovation Center, Kyushu University, Kasuga, Fukuoka, 816-8580, Japan
| | - Susumu Okada
- Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki, 305-8577, Japan
| | - Kazuyoshi Ueno
- Graduate School of Engineering and Science, Shibaura Institute of Technology, Koto, Tokyo, 135-8548, Japan. .,SIT Research Center for Green Innovation, Koto, Tokyo, 135-8548, Japan.
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Terzyk AP, Bryk P, Korczeniewski E, Kowalczyk P, Zawadzka A, Płóciennik P, Wiśniewski M, Wesołowski RP. Water Nanodroplet on a Hydrocarbon "Carpet"-The Mechanism of Water Contact Angle Stabilization by Airborne Contaminations on Graphene, Au, and PTFE Surfaces. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:420-427. [PMID: 30562472 DOI: 10.1021/acs.langmuir.8b03790] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Wetting is very common phenomenon, and it is well documented that the wettability of a solid depends on the surface density of adsorbed airborne hydrocarbons. This "hydrocarbon hypothesis" has been experimentally confirmed for different surfaces, for example, graphene, TiO2, and SiO2; however, there are no scientific reports describing the influence of airborne contaminants on the water contact angle (WCA) value measured on the polytetrafluoroethylene (PTFE) surface. Using experimental data showing the influence of airborne hydrocarbons on the wettability of graphene, gold and PTFE by water, together with Molecular Dynamics simulation results we prove that the relation between the WCA and the surface concentration of hydrocarbons ( n-decane, n-tridecane, and n-tetracosane) is more complex than has been assumed up until now. We show, in contrast to commonly approved opinion, that adsorbed hydrocarbons can increase (graphene, Au) or decrease (PTFE) the WCA of a nanodroplet sitting on a surface. Using classical thermodynamics, a simple theoretical approach is developed. It is based on two adsorbed hydrocarbon states, namely, "carpet" and "dimple". In the "carpet" state a uniform layer of alkane molecules covers the entire substrate. In contrast, in the "dimple" state, the preadsorbed layer of alkane molecules covers only the open surface. Simple thermodynamic balance between the two states explains observed experimental and simulation results, forming a good starting point for future studies.
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Affiliation(s)
- Artur P Terzyk
- Faculty of Chemistry, Physicochemistry of Carbon Materials Research Group , Nicolaus Copernicus University in Toruń , Gagarin Street 7 , 87-100 Toruń , Poland
| | - Paweł Bryk
- Department for the Modeling of Physico - Chemical Processes , Maria Curie - Skłodowska University , 20-031 Lublin , Poland
| | - Emil Korczeniewski
- Faculty of Chemistry, Physicochemistry of Carbon Materials Research Group , Nicolaus Copernicus University in Toruń , Gagarin Street 7 , 87-100 Toruń , Poland
| | - Piotr Kowalczyk
- School of Engineering and Information Technology , Murdoch University , Murdoch 6150 , Western Australia , Australia
| | - Anna Zawadzka
- Department of Automation and Measurement Systems, Faculty of Physics, Astronomy, and Informatics , Nicolaus Copernicus University in Toruń , Grudziadzka Street 5 , 87-100 Toruń , Poland
| | - Przemysław Płóciennik
- Department of Automation and Measurement Systems, Faculty of Physics, Astronomy, and Informatics , Nicolaus Copernicus University in Toruń , Grudziadzka Street 5 , 87-100 Toruń , Poland
| | - Marek Wiśniewski
- Faculty of Chemistry, Physicochemistry of Carbon Materials Research Group , Nicolaus Copernicus University in Toruń , Gagarin Street 7 , 87-100 Toruń , Poland
| | - Radosław P Wesołowski
- Faculty of Chemistry, Physicochemistry of Carbon Materials Research Group , Nicolaus Copernicus University in Toruń , Gagarin Street 7 , 87-100 Toruń , Poland
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37
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Prydatko AV, Belyaeva LA, Jiang L, Lima LMC, Schneider GF. Contact angle measurement of free-standing square-millimeter single-layer graphene. Nat Commun 2018; 9:4185. [PMID: 30305628 PMCID: PMC6180012 DOI: 10.1038/s41467-018-06608-0] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2018] [Accepted: 09/11/2018] [Indexed: 01/17/2023] Open
Abstract
Square millimeters of free-standing graphene do not exist per se because of thermal fluctuations in two-dimensional crystals and their tendency to collapse during the detachment from the substrate. Here we form millimeter-scale freely suspended graphene by injecting an air bubble underneath a graphene monolayer floating at the water-air interface, which allowed us to measure the contact angle on fully free-standing non-contaminated graphene. A captive bubble measurement shows that free-standing clean graphene is hydrophilic with a contact angle of 42° ± 3°. The proposed design provides a simple tool to probe and explore the wettability of two-dimensional materials in free-standing geometries and will expand our perception of two-dimensional materials technologies from microscopic to now millimeter scales.
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Affiliation(s)
- Anna V Prydatko
- Faculty of Science, Leiden Institute of Chemistry, Leiden University, Einsteinweg 55, 2333CC, Leiden, The Netherlands
| | - Liubov A Belyaeva
- Faculty of Science, Leiden Institute of Chemistry, Leiden University, Einsteinweg 55, 2333CC, Leiden, The Netherlands
| | - Lin Jiang
- Faculty of Science, Leiden Institute of Chemistry, Leiden University, Einsteinweg 55, 2333CC, Leiden, The Netherlands
| | - Lia M C Lima
- Faculty of Science, Leiden Institute of Chemistry, Leiden University, Einsteinweg 55, 2333CC, Leiden, The Netherlands
| | - Grégory F Schneider
- Faculty of Science, Leiden Institute of Chemistry, Leiden University, Einsteinweg 55, 2333CC, Leiden, The Netherlands.
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38
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Katzen JM, Velický M, Huang Y, Drakeley S, Hendren W, Bowman RM, Cai Q, Chen Y, Li LH, Huang F. Rigorous and Accurate Contrast Spectroscopy for Ultimate Thickness Determination of Micrometer-Sized Graphene on Gold and Molecular Sensing. ACS APPLIED MATERIALS & INTERFACES 2018; 10:22520-22528. [PMID: 29812895 DOI: 10.1021/acsami.8b01208] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The thickness of graphene films can be accurately determined by optical contrast spectroscopy. However, this becomes challenging and complicated when the flake size reduces to the micrometer scale, where the contrast spectrum is sensitively dependent on the polarization and incident angle of light. Here, we report accurate measurement of the optical contrast spectra of micrometer-sized few-layer graphene flakes on Au substrate. Using a high-resolution optical microscopy with a 100× magnification objective, we accurately determined the layer numbers of flakes as small as one micrometer in lateral size. We developed a theoretical model to accurately take into account the appropriate contribution of light incident at various angles and polarizations, which matched the experimental results extremely well. Furthermore, we demonstrate that the optical contrast spectroscopy is highly sensitive to detect the adsorption of submonolayer airborne hydrocarbon molecules, which can reveal whether graphene is contaminated. Though the technique was demonstrated on graphene, it can be readily generalized to many other two-dimensional materials, which opens new avenues for developing miniaturized and ultrasensitive label-free molecular sensors.
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Affiliation(s)
- Joel M Katzen
- School of Mathematics and Physics , Queen's University Belfast , Belfast BT7 1NN , United Kingdom
| | - Matěj Velický
- School of Mathematics and Physics , Queen's University Belfast , Belfast BT7 1NN , United Kingdom
| | - Yuefeng Huang
- School of Mathematics and Physics , Queen's University Belfast , Belfast BT7 1NN , United Kingdom
| | - Stacey Drakeley
- School of Mathematics and Physics , Queen's University Belfast , Belfast BT7 1NN , United Kingdom
| | - William Hendren
- School of Mathematics and Physics , Queen's University Belfast , Belfast BT7 1NN , United Kingdom
| | - Robert M Bowman
- School of Mathematics and Physics , Queen's University Belfast , Belfast BT7 1NN , United Kingdom
| | - Qiran Cai
- Institute for Frontier Materials , Deakin University , Waurn Ponds , Victoria 3216 , Australia
| | - Ying Chen
- Institute for Frontier Materials , Deakin University , Waurn Ponds , Victoria 3216 , Australia
| | - Lu Hua Li
- Institute for Frontier Materials , Deakin University , Waurn Ponds , Victoria 3216 , Australia
| | - Fumin Huang
- School of Mathematics and Physics , Queen's University Belfast , Belfast BT7 1NN , United Kingdom
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39
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Liu J, Lai CY, Zhang YY, Chiesa M, Pantelides ST. Water wettability of graphene: interplay between the interfacial water structure and the electronic structure. RSC Adv 2018; 8:16918-16926. [PMID: 35540542 PMCID: PMC9080294 DOI: 10.1039/c8ra03509a] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2018] [Accepted: 04/28/2018] [Indexed: 12/14/2022] Open
Abstract
Wettability of graphene is characterized from first principles.
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Affiliation(s)
- Jian Liu
- Department of Physics and Astronomy
- Vanderbilt University
- Tennessee 37235
- USA
| | - Chia-Yun Lai
- Laboratory for Energy and Nano-Sciences
- Khalifa University of Science and Technology
- Abu Dhabi
- United Arab Emirates
| | - Yu-Yang Zhang
- Department of Physics and Astronomy
- Vanderbilt University
- Tennessee 37235
- USA
| | - Matteo Chiesa
- Laboratory for Energy and Nano-Sciences
- Khalifa University of Science and Technology
- Abu Dhabi
- United Arab Emirates
| | - Sokrates T. Pantelides
- Department of Physics and Astronomy
- Vanderbilt University
- Tennessee 37235
- USA
- Department of Electrical Engineering and Computer Science
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40
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Preston DJ, Song Y, Lu Z, Antao DS, Wang EN. Design of Lubricant Infused Surfaces. ACS APPLIED MATERIALS & INTERFACES 2017; 9:42383-42392. [PMID: 29121462 DOI: 10.1021/acsami.7b14311] [Citation(s) in RCA: 68] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Lubricant infused surfaces (LIS) are a recently developed and promising approach to fluid repellency for applications in biology, microfluidics, thermal management, lab-on-a-chip, and beyond. The design of LIS has been explored in past work in terms of surface energies, which need to be determined empirically for each interface in a given system. Here, we developed an approach that predicts a priori whether an arbitrary combination of solid and lubricant will repel a given impinging fluid. This model was validated with experiments performed in our work as well as in literature and was subsequently used to develop a new framework for LIS with distinct design guidelines. Furthermore, insights gained from the model led to the experimental demonstration of LIS using uncoated high-surface-energy solids, thereby eliminating the need for unreliable low-surface-energy coatings and resulting in LIS repelling the lowest surface tension impinging fluid (butane, γ ≈ 13 mN/m) reported to date.
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Affiliation(s)
- Daniel J Preston
- Department of Mechanical Engineering, Massachusetts Institute of Technology , 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - Youngsup Song
- Department of Mechanical Engineering, Massachusetts Institute of Technology , 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - Zhengmao Lu
- Department of Mechanical Engineering, Massachusetts Institute of Technology , 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - Dion S Antao
- Department of Mechanical Engineering, Massachusetts Institute of Technology , 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - Evelyn N Wang
- Department of Mechanical Engineering, Massachusetts Institute of Technology , 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
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41
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Cabrero-Vilatela A, Alexander-Webber JA, Sagade AA, Aria AI, Braeuninger-Weimer P, Martin MB, Weatherup RS, Hofmann S. Atomic layer deposited oxide films as protective interface layers for integrated graphene transfer. NANOTECHNOLOGY 2017; 28:485201. [PMID: 29039352 DOI: 10.1088/1361-6528/aa940c] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
The transfer of chemical vapour deposited graphene from its parent growth catalyst has become a bottleneck for many of its emerging applications. The sacrificial polymer layers that are typically deposited onto graphene for mechanical support during transfer are challenging to remove completely and hence leave graphene and subsequent device interfaces contaminated. Here, we report on the use of atomic layer deposited (ALD) oxide films as protective interface and support layers during graphene transfer. The method avoids any direct contact of the graphene with polymers and through the use of thicker ALD layers (≥100 nm), polymers can be eliminated from the transfer-process altogether. The ALD film can be kept as a functional device layer, facilitating integrated device manufacturing. We demonstrate back-gated field effect devices based on single-layer graphene transferred with a protective Al2O3 film onto SiO2 that show significantly reduced charge trap and residual carrier densities. We critically discuss the advantages and challenges of processing graphene/ALD bilayer structures.
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Affiliation(s)
- A Cabrero-Vilatela
- Department of Engineering, University of Cambridge, 9 JJ Thomson Avenue, Cambridge CB3 0FA, United Kingdom
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42
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Photoluminescence and electrochemical investigation of curcumin-reduced graphene oxide sheets. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY 2017. [DOI: 10.1007/s13738-017-1236-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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43
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A comprehensive review on wettability, desalination, and purification using graphene-based materials at water interfaces. Catal Today 2017. [DOI: 10.1016/j.cattod.2017.04.027] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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44
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Singla S, Anim-Danso E, Islam AE, Ngo Y, Kim SS, Naik RR, Dhinojwala A. Insight on Structure of Water and Ice Next to Graphene Using Surface-Sensitive Spectroscopy. ACS NANO 2017; 11:4899-4906. [PMID: 28448717 DOI: 10.1021/acsnano.7b01499] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The water/graphene interface has received considerable attention in the past decade due to its relevance in various potential applications including energy storage, sensing, desalination, and catalysis. Most of our knowledge about the interfacial water structure next to graphene stems from simulations, which use experimentally measured water contact angles (WCAs) on graphene (or graphite) to estimate the water-graphene interaction strength. However, the existence of a wide spectrum of reported WCAs on supported graphene and graphitic surfaces makes it difficult to interpret the water-graphene interactions. Here, we have used surface-sensitive infrared-visible sum frequency generation (SFG) spectroscopy to probe the interfacial water structure next to graphene supported on a sapphire substrate. In addition, the ice nucleation properties of graphene have been explored by performing in situ freezing experiments as graphitic surfaces are considered good ice nucleators. For graphene supported on sapphire, we observed a strong SFG peak associated with highly coordinated, ordered water next to graphene. Similar ordering was not detected next to bare sapphire, implying that the observed ordering of water molecules in the former case is a consequence of the presence of graphene. Our analysis indicates that graphene behaves like a hydrophobic (or negatively charged) surface, leading to enhanced ordering of water molecules. Although liquid water orders next to graphene, the ice formed is proton disordered. This research sheds light on water-graphene interactions relevant in optimizing the performance of graphene in various applications.
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Affiliation(s)
- Saranshu Singla
- Department of Polymer Science, The University of Akron , Akron, Ohio 44325-3909, United States
| | - Emmanuel Anim-Danso
- Department of Polymer Science, The University of Akron , Akron, Ohio 44325-3909, United States
- Solvay Speciality Polymers , 4500 McGinnis Ferry Road, Alpharetta, Georgia 30005, United States
| | | | | | | | | | - Ali Dhinojwala
- Department of Polymer Science, The University of Akron , Akron, Ohio 44325-3909, United States
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45
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46
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Walker M, Ubych K, Saraswat V, Chalklen EA, Braeuninger-Weimer P, Caneva S, Weatherup RS, Hofmann S, Keyser UF. Extrinsic Cation Selectivity of 2D Membranes. ACS NANO 2017; 11:1340-1346. [PMID: 28157333 PMCID: PMC5333182 DOI: 10.1021/acsnano.6b06034] [Citation(s) in RCA: 58] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2016] [Accepted: 02/03/2017] [Indexed: 05/22/2023]
Abstract
From a systematic study of the concentration driven diffusion of positive and negative ions across porous 2D membranes of graphene and hexagonal boron nitride (h-BN), we prove their cation selectivity. Using the current-voltage characteristics of graphene and h-BN monolayers separating reservoirs of different salt concentrations, we calculate the reversal potential as a measure of selectivity. We tune the Debye screening length by exchanging the salt concentrations and demonstrate that negative surface charge gives rise to cation selectivity. Surprisingly, h-BN and graphene membranes show similar characteristics, strongly suggesting a common origin of selectivity in aqueous solvents. For the first time, we demonstrate that the cation flux can be increased by using ozone to create additional pores in graphene while maintaining excellent selectivity. We discuss opportunities to exploit our scalable method to use 2D membranes for applications including osmotic power conversion.
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Affiliation(s)
- Michael
I. Walker
- Cavendish
Laboratory, University of Cambridge, J.J. Thomson Avenue, Cambridge CB3 0HE, United Kingdom
| | - Krystian Ubych
- Cavendish
Laboratory, University of Cambridge, J.J. Thomson Avenue, Cambridge CB3 0HE, United Kingdom
| | - Vivek Saraswat
- Department
of Materials Science and Metallurgy, University
of Cambridge, Cambridge CB3 0FS, United Kingdom
| | - Edward A. Chalklen
- Department
of Engineering, University of Cambridge, Cambridge CB3 0FA, United Kingdom
| | | | - Sabina Caneva
- Department
of Engineering, University of Cambridge, Cambridge CB3 0FA, United Kingdom
| | - Robert S. Weatherup
- Department
of Engineering, University of Cambridge, Cambridge CB3 0FA, United Kingdom
| | - Stephan Hofmann
- Department
of Engineering, University of Cambridge, Cambridge CB3 0FA, United Kingdom
| | - Ulrich F. Keyser
- Cavendish
Laboratory, University of Cambridge, J.J. Thomson Avenue, Cambridge CB3 0HE, United Kingdom
- E-mail:
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47
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Kozbial A, Trouba C, Liu H, Li L. Characterization of the Intrinsic Water Wettability of Graphite Using Contact Angle Measurements: Effect of Defects on Static and Dynamic Contact Angles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:959-967. [PMID: 28071919 DOI: 10.1021/acs.langmuir.6b04193] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Elucidating the intrinsic water wettability of the graphitic surface has increasingly attracted research interests, triggered by the recent finding that the well-established hydrophobicity of graphitic surfaces actually results from airborne hydrocarbon contamination. Currently, static water contact angle (WCA) is often used to characterize the intrinsic water wettability of graphitic surfaces. In the current paper, we show that because of the existence of defects, static WCA does not necessarily characterize the intrinsic water wettability. Freshly exfoliated graphite of varying qualities, characterized using atomic force microscopy and Raman spectroscopy, was studied using static, advancing, and receding WCA measurements. The results showed that graphite of different qualities (i.e., defect density) always has a similar advancing WCA, but it could have very different static and receding WCAs. This finding indicates that defects play an important role in contact angle measurements, and the static contact angle does not always represent the intrinsic water wettability of pristine graphite. On the basis of the experimental results, a qualitative model is proposed to explain the effect of defects on static, advancing, and receding contact angles. The model suggests that the advancing WCA reflects the intrinsic water wettability of pristine (defect-free) graphite. Our results showed that the advancing WCA for pristine graphite is 68.6°, which indicates that graphitic carbon is intrinsically mildly hydrophilic.
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Affiliation(s)
- Andrew Kozbial
- Department of Chemical & Petroleum Engineering, Swanson School of Engineering, ‡Department of Chemistry, and §Department of Mechanical Engineering & Materials Science, Swanson School of Engineering, University of Pittsburgh , Pittsburgh, Pennsylvania 15260, United States
| | - Charlie Trouba
- Department of Chemical & Petroleum Engineering, Swanson School of Engineering, ‡Department of Chemistry, and §Department of Mechanical Engineering & Materials Science, Swanson School of Engineering, University of Pittsburgh , Pittsburgh, Pennsylvania 15260, United States
| | - Haitao Liu
- Department of Chemical & Petroleum Engineering, Swanson School of Engineering, ‡Department of Chemistry, and §Department of Mechanical Engineering & Materials Science, Swanson School of Engineering, University of Pittsburgh , Pittsburgh, Pennsylvania 15260, United States
| | - Lei Li
- Department of Chemical & Petroleum Engineering, Swanson School of Engineering, ‡Department of Chemistry, and §Department of Mechanical Engineering & Materials Science, Swanson School of Engineering, University of Pittsburgh , Pittsburgh, Pennsylvania 15260, United States
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48
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Peng Z, Yang R, Kim MA, Li L, Liu H. Influence of O2, H2O and airborne hydrocarbons on the properties of selected 2D materials. RSC Adv 2017. [DOI: 10.1039/c7ra02130e] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
Adsorption of molecules from the ambient environment significantly changes the optical, electrical, electrochemical, and tribological properties of 2D materials.
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Affiliation(s)
- Zhenbo Peng
- Chemical Engineering College
- Ningbo Polytechnic
- Ningbo
- P. R. China
- Department of Chemistry
| | - Rui Yang
- Department of Chemistry
- Beihua University
- Jilin
- P. R. China
- Department of Chemistry
| | - Min A. Kim
- Department of Chemistry
- University of Pittsburgh
- Pittsburgh
- USA
| | - Lei Li
- Department of Chemical & Petroleum Engineering
- Swanson School of Engineering
- University of Pittsburgh
- Pittsburgh
- USA
| | - Haitao Liu
- Department of Chemistry
- University of Pittsburgh
- Pittsburgh
- USA
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49
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Abstract
Graphitic carbons are important solid materials with myriad applications including electrodes, adsorbents, catalyst support, and solid lubricants. Understanding the interaction between water and graphitic carbons is critically important for both fundamental material characterization and practical device fabrication because the water-graphitic interface is essential to many applications. Research interests in graphene and carbon nanotubes over the past decades have brought renewed interest to elucidate wettability of graphitic carbons and understand their interaction with the surrounding environment. Research on this topic can be traced back to the 1940s, and the prevailing notion has been that graphitic carbons are hydrophobic. Though there have been different voices, this conclusion is supported by many previous water contact angle tests and well accepted by the community since sp2 carbon is nonpolar in nature. However, recent results from our groups showed that graphitic surfaces are intrinsically mildly hydrophilic and adsorbed hydrocarbon contaminants from the ambient air render the surface hydrophobic. This unexpected finding challenges the long-lasting conception and could completely change the way graphitic materials are made, modeled, and modified. With several other research groups reporting similar findings, it is important for the community to realize the importance of airborne contamination on the surface-related properties of graphitic materials and revisit the intrinsic water-graphite interaction. This Account aims to summarize our recent work on water wettability of graphitic surfaces and discuss future research directions toward understanding the intrinsic water-graphite interaction. Historical perspective will first be provided highlighting the long accepted notion that graphite is hydrophobic along with a few reports suggesting otherwise. Next, our recent experimental data will be presented showing that pristine graphene and graphite are mildly hydrophilic; chemical analysis showed that hydrocarbons adsorb onto the clean surfaces thus rendering them hydrophobic. These results are further rationalized by analyzing the change in surface energy of the graphitic surfaces before and after hydrocarbon contamination. Facile methods to remove hydrocarbons from a contaminated surface will be discussed along with a convenient water treatment method that we developed to inhibit hydrocarbon adsorption onto a pristine graphitic surface. Implications of contamination will be illustrated through comparing the electrochemical activity of pristine and contaminated graphite. Lastly, consequences of these findings and future research directions to address a few important unanswered questions will be discussed.
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Affiliation(s)
- Andrew Kozbial
- Department of Chemical & Petroleum Engineering, Swanson School of Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, United States
| | - Feng Zhou
- Department
of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Zhiting Li
- Department
of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Haitao Liu
- Department
of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Lei Li
- Department of Chemical & Petroleum Engineering, Swanson School of Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, United States
- Department of Mechanical Engineering & Materials Science, Swanson School of Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, United States
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50
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Włoch J, Terzyk AP, Gauden PA, Wesołowski R, Kowalczyk P. Water nanodroplet on a graphene surface-a new old system. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2016; 28:495002. [PMID: 27736807 DOI: 10.1088/0953-8984/28/49/495002] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The major subject of our study is the accuracy of contact angle calculations. Reporting new simulation data for graphene-water systems, we show that the majority of previously reported data should be treated with caution, since the proper contact angle can be recorded only after a sufficiently long simulation time. It has been proven that-if one wants to gain accuracy greater than 0.1°-long calculations (exceeding 50 ns) are required. Finally, we also show, using both a Groningen Machine for Chemical Simulations (GROMACS) package and our new molecular dynamics (MD) code, that the changes in the contact angle, caused by graphene bottom layer rotation, are within the range of calculation error. We also propose a novel definition of the bottom of the droplet as the height where the density is half the density of liquid water. This new definition is applied in the method of the contact angle calculation from the MD simulation data.
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Affiliation(s)
- Jerzy Włoch
- Faculty of Chemistry, Synthesis and Modification of Carbon Materials Research Group, Nicolaus Copernicus University in Toruń, Gagarin Street 7, 87-100 Toruń, Poland
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