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Chaney LE, van Beek A, Downing JR, Zhang J, Zhang H, Hui J, Sorensen EA, Khalaj M, Dunn JB, Chen W, Hersam MC. Bayesian Optimization of Environmentally Sustainable Graphene Inks Produced by Wet Jet Milling. Small 2024:e2309579. [PMID: 38530067 DOI: 10.1002/smll.202309579] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2023] [Revised: 02/24/2024] [Indexed: 03/27/2024]
Abstract
Liquid phase exfoliation (LPE) of graphene is a potentially scalable method to produce conductive graphene inks for printed electronic applications. Among LPE methods, wet jet milling (WJM) is an emerging approach that uses high-speed, turbulent flow to exfoliate graphene nanoplatelets from graphite in a continuous flow manner. Unlike prior WJM work based on toxic, high-boiling-point solvents such as n-methyl-2-pyrollidone (NMP), this study uses the environmentally friendly solvent ethanol and the polymer stabilizer ethyl cellulose (EC). Bayesian optimization and iterative batch sampling are employed to guide the exploration of the experimental phase space (namely, concentrations of graphite and EC in ethanol) in order to identify the Pareto frontier that simultaneously optimizes three performance criteria (graphene yield, conversion rate, and film conductivity). This data-driven strategy identifies vastly different optimal WJM conditions compared to literature precedent, including an optimal loading of 15 wt% graphite in ethanol compared to 1 wt% graphite in NMP. These WJM conditions provide superlative graphene production rates of 3.2 g hr-1 with the resulting graphene nanoplatelets being suitable for screen-printed micro-supercapacitors. Finally, life cycle assessment reveals that ethanol-based WJM graphene exfoliation presents distinct environmental sustainability advantages for greenhouse gas emissions, fossil fuel consumption, and toxicity.
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Affiliation(s)
- Lindsay E Chaney
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL, 60208, USA
| | - Anton van Beek
- School of Mechanical and Materials Engineering, University College Dublin, Dublin, D04 V1W8, Ireland
- Department of Mechanical Engineering, Northwestern University, Evanston, IL, 60208, USA
| | - Julia R Downing
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL, 60208, USA
| | - Jinrui Zhang
- Department of Chemical and Biological Engineering, Northwestern University, Evanston, IL, 60208, USA
| | - Hengrui Zhang
- Department of Mechanical Engineering, Northwestern University, Evanston, IL, 60208, USA
| | - Janan Hui
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL, 60208, USA
- Department of Chemistry, Northwestern University, Evanston, IL, 60208, USA
| | - E Alexander Sorensen
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL, 60208, USA
| | - Maryam Khalaj
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL, 60208, USA
| | - Jennifer B Dunn
- Department of Mechanical Engineering, Northwestern University, Evanston, IL, 60208, USA
- Department of Chemical and Biological Engineering, Northwestern University, Evanston, IL, 60208, USA
| | - Wei Chen
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL, 60208, USA
- Department of Mechanical Engineering, Northwestern University, Evanston, IL, 60208, USA
| | - Mark C Hersam
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL, 60208, USA
- Department of Chemistry, Northwestern University, Evanston, IL, 60208, USA
- Department of Medicine, Department of Electrical and Computer Engineering, Northwestern University, Evanston, IL, 60208, USA
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2
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He Y, Andrade AF, Ménard-Moyon C, Bianco A. Biocompatible 2D Materials via Liquid Phase Exfoliation. Adv Mater 2024:e2310999. [PMID: 38457626 DOI: 10.1002/adma.202310999] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2023] [Revised: 02/17/2024] [Indexed: 03/10/2024]
Abstract
2D materials (2DMs), such as graphene, transition metal dichalcogenides (TMDs), and black phosphorus (BP), have been proposed for different types of bioapplications, owing to their unique physicochemical, electrical, optical, and mechanical properties. Liquid phase exfoliation (LPE), as one of the most effective up-scalable and size-controllable methods, is becoming the standard process to produce high quantities of various 2DM types as it can benefit from the use of green and biocompatible conditions. The resulting exfoliated layered materials have garnered significant attention because of their biocompatibility and their potential use in biomedicine as new multimodal therapeutics, antimicrobials, and biosensors. This review focuses on the production of LPE-assisted 2DMs in aqueous solutions with or without the aid of surfactants, bioactive, or non-natural molecules, providing insights into the possibilities of applications of such materials in the biological and biomedical fields.
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Affiliation(s)
- Yilin He
- CNRS, Immunology, Immunopathology and Therapeutic Chemistry, UPR 3572, University of Strasbourg, ISIS, Strasbourg, 67000, France
| | - Andrés Felipe Andrade
- CNRS, Immunology, Immunopathology and Therapeutic Chemistry, UPR 3572, University of Strasbourg, ISIS, Strasbourg, 67000, France
| | - Cécilia Ménard-Moyon
- CNRS, Immunology, Immunopathology and Therapeutic Chemistry, UPR 3572, University of Strasbourg, ISIS, Strasbourg, 67000, France
| | - Alberto Bianco
- CNRS, Immunology, Immunopathology and Therapeutic Chemistry, UPR 3572, University of Strasbourg, ISIS, Strasbourg, 67000, France
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3
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Noureen S, Rehman SU, Batool SM, Ali J, Zhang Q, Batool SS, Wang Y, Li C. Tailoring Bi 2Se 3 Topological Insulator for Visible-NIR Photodetectors with Schottky Contacts Using Liquid Phase Exfoliation. ACS Appl Mater Interfaces 2024; 16:8158-8168. [PMID: 38301155 DOI: 10.1021/acsami.3c15315] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/03/2024]
Abstract
Layered semiconductors of the V-VI group have attracted considerable attention in optoelectronic applications owing to their atomically thin structures. They offer thickness-dependent optical and electronic properties, promising ultrafast response time, and high sensitivity. Compared to the bulk, 2D bismuth selenide (Bi2Se3) is recently considered a highly promising material. In this study, 2D nanosheets are synthesized by prolonged sonication in two different solvents, such as N-methyl-2-pyrrolidone (NMP) and chitosan-acetic acid solution (CS-HAc), using the liquid-phase exfoliation (LPE) method. X-ray diffraction confirms the amorphous nature of exfoliated 2D nanosheets with maximum peak intensity at the same position (015) crystal plane as that obtained in its bulk counterpart. SEM confirms the thin 2D nanosheet-like morphology. Successful exfoliation of Bi2Se3 nanosheets up to five layers is achieved using CS-HAc solvent. The as-synthesized 2D nanosheets in different solvents are employed to fabricate the photodetector. At minimum selected power density, the photodetector fabricated using exfoliated ultrathin 2D nanosheets exhibits the highest range of responsivity, varying from 15 to 2.5 mA/W, and detectivity ranging from 2.83 × 109 to 6.37 × 107. Ultrathin 2D Bi2Se3 nanosheets have fast rise and fall times, ranging from 0.01 to 0.12 and 0.01 to 0.06 s, respectively, at different wavelengths. Ultrathin Bi2Se3 nanosheets have improved photodetection parameters as compared to multilayered nanosheets due to the high surface to volume ratio, reduced recombination and trapping of charge carrier, improved carrier confinement, and faster carrier transport due to the thin layer.
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Affiliation(s)
- Sadaf Noureen
- School of Science, Minzu University of China, Beijing 100081, China
- Optoelectronic Research Laboratory (OERL), Department of Physics, COMSATS University Islamabad, Park Road, Chak Shahzad, Islamabad 45550, Pakistan
| | - Sajid Ur Rehman
- School of Science, Minzu University of China, Beijing 100081, China
| | - Syeda Maria Batool
- Electric Material and Nanotechnology Lab, North Dakota State University, Fargo, North Dakota 58102, United States
| | - Junaid Ali
- Optoelectronic Research Laboratory (OERL), Department of Physics, COMSATS University Islamabad, Park Road, Chak Shahzad, Islamabad 45550, Pakistan
| | - Qifeng Zhang
- Electric Material and Nanotechnology Lab, North Dakota State University, Fargo, North Dakota 58102, United States
| | - Syeda Sitwat Batool
- School of Science, Minzu University of China, Beijing 100081, China
- Optoelectronic Research Laboratory (OERL), Department of Physics, COMSATS University Islamabad, Park Road, Chak Shahzad, Islamabad 45550, Pakistan
| | - Yang Wang
- School of Science, Minzu University of China, Beijing 100081, China
- Optoelectronics Research Center, Minzu University of China, Beijing 100081, China
| | - Chuanbo Li
- School of Science, Minzu University of China, Beijing 100081, China
- Optoelectronics Research Center, Minzu University of China, Beijing 100081, China
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Chen L, Hu K, Lu M, Chen Z, Chen X, Zhou T, Liu X, Yin W, Casiraghi C, Song X. Wearable Sensors for Breath Monitoring Based on Water-Based Hexagonal Boron Nitride Inks Made with Supramolecular Functionalization. Adv Mater 2024:e2312621. [PMID: 38168037 DOI: 10.1002/adma.202312621] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2023] [Indexed: 01/05/2024]
Abstract
Wearable humidity sensors are attracting strong attention as they allow for real-time and continuous monitoring of important physiological information by enabling activity tracking as well as air quality assessment. Amongst 2Dimensional (2D) materials, graphene oxide (GO) is very attractive for humidity sensing due to its tuneable surface chemistry, high surface area, processability in water, and easy integration onto flexible substrates. However, strong hysteresis, low sensitivity, and cross-sensitivity issues limit the use of GO in practical applications, where continuous monitoring is preferred. Herein, a wearable and wireless impedance-based humidity sensor made with pyrene-functionalized hexagonal boron nitride (h-BN) nanosheets is demonstrated. The device shows enhanced sensitivity towards relative humidity (RH) (>1010 Ohms/%RH in the range from 5% to 100% RH), fast response (0.1 ms), no appreciable hysteresis, and no cross-sensitivity with temperature in the range of 25-60 °C. The h-BN-based sensor is able to monitor the whole breathing cycle process of exhaling and inhaling, hence enabling to record in real-time the subtlest changes of respiratory signals associated with different daily activities as well as various symptoms of flu, without requiring any direct contact with the individual.
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Affiliation(s)
- Liming Chen
- Department of Chemistry, University of Manchester, Manchester, M13 9PL, UK
- Department of Electrical and Electronic Engineering, University of Manchester, Manchester, M13 9PL, UK
| | - Kui Hu
- Department of Chemistry, University of Manchester, Manchester, M13 9PL, UK
| | - Mingyang Lu
- Department of Electrical and Electronic Engineering, University of Manchester, Manchester, M13 9PL, UK
| | - Ziqi Chen
- Department of Electrical and Electronic Engineering, University of Manchester, Manchester, M13 9PL, UK
| | - Xiwen Chen
- College of Energy, Soochow Institute for Energy and Materials InnovationS (SIEMIS), Jiangsu Provincial Key Laboratory for Advanced Carbon Materials and Wearable Energy Technologies, Soochow University, Suzhou, 215006, P. R. China
| | - Tianqi Zhou
- Department of Electrical and Electronic Engineering, University of Manchester, Manchester, M13 9PL, UK
| | - Xuqing Liu
- Department of Materials Science, University of Manchester, Manchester, M13 9PL, UK
| | - Wuliang Yin
- Department of Electrical and Electronic Engineering, University of Manchester, Manchester, M13 9PL, UK
| | - Cinzia Casiraghi
- Department of Chemistry, University of Manchester, Manchester, M13 9PL, UK
| | - Xiuju Song
- Department of Chemistry, University of Manchester, Manchester, M13 9PL, UK
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5
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Chow D, Burns N, Boateng E, van der Zalm J, Kycia S, Chen A. Mechanical Exfoliation of Expanded Graphite to Graphene-Based Materials and Modification with Palladium Nanoparticles for Hydrogen Storage. Nanomaterials (Basel) 2023; 13:2588. [PMID: 37764617 PMCID: PMC10534434 DOI: 10.3390/nano13182588] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2023] [Revised: 09/08/2023] [Accepted: 09/13/2023] [Indexed: 09/29/2023]
Abstract
Hydrogen is a promising green fuel carrier that can replace fossil fuels; however, its storage is still a challenge. Carbon-based materials with metal catalysts have recently been the focus of research for solid-state hydrogen storage due to their efficacy and low cost. Here, we report on the exfoliation of expanded graphite (EG) through high shear mixing and probe tip sonication methods to form graphene-based nanomaterial ShEG and sEG, respectively. The exfoliation processes were optimized based on electrochemical capacitance measurements. The exfoliated EG was further functionalized with palladium nanoparticles (Pd-NP) for solid-state hydrogen storage. The prepared graphene-based nanomaterials (ShEG and sEG) and the nanocomposites (Pd-ShEG and Pd-sEG) were characterized with various traditional techniques (e.g., SEM, TEM, EDX, XPS, Raman, XRD) and the advanced high-resolution pair distribution function (HRPDF) analysis. Electrochemical hydrogen uptake and release (QH) were measured, showing that the sEG decorated with Pd-NP (Pd-sEG, 31.05 mC cm-2) and ShEG with Pd-NP (Pd-ShEG, 24.54 mC cm-2) had a notable improvement over Pd-NP (9.87 mC cm-2) and the composite of Pd-EG (14.7 mC cm-2). QH showed a strong linear relationship with an effective surface area to volume ratio, indicating nanoparticle size as a determining factor for hydrogen uptake and release. This work is a promising step toward the design of the high-performance solid-state hydrogen storage devices through mechanical exfoliation of the substrate EG to control nanoparticle size and dispersion.
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Affiliation(s)
- Darren Chow
- Electrochemical Technology Center, Department of Chemistry, University of Guelph, 50 Stone Road East, Guelph, ON N1G 2W1, Canada; (D.C.); (E.B.); (J.v.d.Z.)
| | - Nicholas Burns
- Department of Physics, University of Guelph, 50 Stone Road East, Guelph, ON N1G 2W1, Canada;
| | - Emmanuel Boateng
- Electrochemical Technology Center, Department of Chemistry, University of Guelph, 50 Stone Road East, Guelph, ON N1G 2W1, Canada; (D.C.); (E.B.); (J.v.d.Z.)
| | - Joshua van der Zalm
- Electrochemical Technology Center, Department of Chemistry, University of Guelph, 50 Stone Road East, Guelph, ON N1G 2W1, Canada; (D.C.); (E.B.); (J.v.d.Z.)
| | - Stefan Kycia
- Department of Physics, University of Guelph, 50 Stone Road East, Guelph, ON N1G 2W1, Canada;
| | - Aicheng Chen
- Electrochemical Technology Center, Department of Chemistry, University of Guelph, 50 Stone Road East, Guelph, ON N1G 2W1, Canada; (D.C.); (E.B.); (J.v.d.Z.)
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6
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Liu Y, Wen Z, Huang Z, Wang Y, Chen Z, Lai S, Chen S, Zhou Y. Liquid Phase Graphene Exfoliation with a Vibration-Based Acoustofluidic Effector. Micromachines (Basel) 2023; 14:1718. [PMID: 37763883 PMCID: PMC10534619 DOI: 10.3390/mi14091718] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2023] [Revised: 08/28/2023] [Accepted: 08/30/2023] [Indexed: 09/29/2023]
Abstract
Liquid phase exfoliation (LPE) has emerged as a promising method for the industrial-scale production of graphene. However, one of its critical steps, namely sonication, has faced challenges due to high power consumption and low efficiency, leading to limited applicability in industrial settings. This study introduces a novel, cost-effective microfluidic sonication device designed to significantly reduce power consumption while efficiently assisting the LPE process for graphene production. By coupling a capillary with a buzzer and applying an appropriate electric signal, simulation and particle tracing experiments reveal the generation of robust shear forces resulting from acoustic streaming and cavitation when the capillary end is immersed in the liquid. For the first time, the capillary-based sonication device was effectively utilized for graphene exfoliation in a DMF (N,N-Dimethylformamide) + NaOH liquid phase system. The SEM (Scanning Electron Microscope) and Raman characterization results corroborate the successful exfoliation of 100 nm with thicknesses below 10 nm graphene sheets from graphite flakes using this pioneering device. The values of I2D/IG increase after processing, which suggests the exfoliation of graphite flakes into thinner graphene sheets. The vibration-based acoustofluidic effector represents a versatile and scalable miniature device, capable of being employed individually for small-batch production, thereby optimizing the utilization of raw 2D materials, particularly in experimental scenarios. Alternatively, it holds the potential for large-scale manufacturing through extensive parallelization, offering distinct advantages in terms of cost-efficiency and minimal power consumption.
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Affiliation(s)
| | | | | | | | | | | | | | - Yinning Zhou
- Joint Key Laboratory of the Ministry of Education, Institute of Applied Physics and Materials Engineering, University of Macau, Avenida da Universidade, Taipa, Macau 999078, China; (Y.L.); (Z.W.); (Z.H.); (Y.W.); (Z.C.); (S.L.); (S.C.)
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7
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Ko SB, Sun Y, Park G, Choi HJ, Kim JG, Kim JB, Jung HJ, Lee GS, Hong S, Padmajan Sasikala S, Kim SO. Scalable Solution Phase Synthesis of 2D Siloxene via a Two-Step Interlayer Expansion Process. ACS Appl Mater Interfaces 2023. [PMID: 37377389 DOI: 10.1021/acsami.3c05289] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/29/2023]
Abstract
Two-dimensional (2D) siloxene is attracting considerable research interest recently principally owing to its inherent compatibility with silicon-based semiconductor technology. -The synthesis of siloxene has been mostly limited to multilayered structures using traditional topochemical reaction procedures. Herein, we report high-yield synthesis of single to few-layer siloxene nanosheets by developing a two-step interlayer expansion and subsequent liquid phase exfoliation procedure. Our protocol enables high-yield production of few-layer siloxene nanosheets with a lateral dimension of up to 4 μm and thickness ranging from 0.8 to 4.8 nm, corresponding to single to a few layers, well stabilized in water. The atomically flat nature of exfoliated siloxene can be exploited for the construction of 2D/2D heterostructure membranes via typical solution processing. We demonstrate highly ordered graphene/siloxene heterostructure films with synergistic mechanical and electrical properties, which deliver noticeably high device capacitance when assembled into a coin cell symmetric supercapacitor device structures. Additionally, we demonstrate that the mechanically flexible exfoliated siloxene-graphene heterostructure enables its direct use in flexible and wearable supercapacitor applications.
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Affiliation(s)
- Seung-Bo Ko
- Department of Materials Science and Engineering, KAIST, Daejeon 34141, Republic of Korea
- National Creative Research Initiative Center for Multi-Dimensional Directed Nanoscale Assembly, KAIST, Daejeon 34141, Republic of Korea
| | - Yan Sun
- Department of Materials Science and Engineering, KAIST, Daejeon 34141, Republic of Korea
- National Creative Research Initiative Center for Multi-Dimensional Directed Nanoscale Assembly, KAIST, Daejeon 34141, Republic of Korea
| | - Gun Park
- Department of Materials Science and Engineering, KAIST, Daejeon 34141, Republic of Korea
| | - Hee Jae Choi
- Department of Materials Science and Engineering, KAIST, Daejeon 34141, Republic of Korea
- National Creative Research Initiative Center for Multi-Dimensional Directed Nanoscale Assembly, KAIST, Daejeon 34141, Republic of Korea
| | - Jin Goo Kim
- Department of Materials Science and Engineering, KAIST, Daejeon 34141, Republic of Korea
- National Creative Research Initiative Center for Multi-Dimensional Directed Nanoscale Assembly, KAIST, Daejeon 34141, Republic of Korea
| | - June Beom Kim
- Department of Materials Science and Engineering, KAIST, Daejeon 34141, Republic of Korea
- National Creative Research Initiative Center for Multi-Dimensional Directed Nanoscale Assembly, KAIST, Daejeon 34141, Republic of Korea
| | - Hong Ju Jung
- Department of Materials Science and Engineering, KAIST, Daejeon 34141, Republic of Korea
- National Creative Research Initiative Center for Multi-Dimensional Directed Nanoscale Assembly, KAIST, Daejeon 34141, Republic of Korea
| | - Gang San Lee
- Department of Materials Science and Engineering, KAIST, Daejeon 34141, Republic of Korea
- National Creative Research Initiative Center for Multi-Dimensional Directed Nanoscale Assembly, KAIST, Daejeon 34141, Republic of Korea
| | - Seungbum Hong
- Department of Materials Science and Engineering, KAIST, Daejeon 34141, Republic of Korea
| | - Suchithra Padmajan Sasikala
- Department of Materials Science and Engineering, KAIST, Daejeon 34141, Republic of Korea
- National Creative Research Initiative Center for Multi-Dimensional Directed Nanoscale Assembly, KAIST, Daejeon 34141, Republic of Korea
| | - Sang Ouk Kim
- Department of Materials Science and Engineering, KAIST, Daejeon 34141, Republic of Korea
- National Creative Research Initiative Center for Multi-Dimensional Directed Nanoscale Assembly, KAIST, Daejeon 34141, Republic of Korea
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Shcherbakov A, Synnatschke K, Bodnar S, Zerhoch J, Eyre L, Rauh F, Heindl MW, Liu S, Konecny J, Sharp ID, Sofer Z, Backes C, Deschler F. Solution-Processed NiPS 3 Thin Films from Liquid Exfoliated Inks with Long-Lived Spin-Entangled Excitons. ACS Nano 2023. [PMID: 37220255 DOI: 10.1021/acsnano.3c01119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Antiferromagnets are promising materials for future opto-spintronic applications since they show spin dynamics in the THz range and no net magnetization. Recently, layered van der Waals (vdW) antiferromagnets have been reported, which combine low-dimensional excitonic properties with complex spin-structure. While various methods for the fabrication of vdW 2D crystals exist, formation of large area and continuous thin films is challenging because of either limited scalability, synthetic complexity, or low opto-spintronic quality of the final material. Here, we fabricate centimeter-scale thin films of the van der Waals 2D antiferromagnetic material NiPS3, which we prepare using a crystal ink made from liquid phase exfoliation (LPE). We perform statistical atomic force microscopy (AFM) and scanning electron microscopy (SEM) to characterize and control the lateral size and number of layers through this ink-based fabrication. Using ultrafast optical spectroscopy at cryogenic temperatures, we resolve the dynamics of photoexcited excitons. We find antiferromagnetic spin arrangement and spin-entangled Zhang-Rice multiplet excitons with lifetimes in the nanosecond range, as well as ultranarrow emission line widths, despite the disordered nature of our films. Thus, our findings demonstrate scalable thin-film fabrication of high-quality NiPS3, which is crucial for translating this 2D antiferromagnetic material into spintronic and nanoscale memory devices and further exploring its complex spin-light coupled states.
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Affiliation(s)
- Andrii Shcherbakov
- Institute for Physical Chemistry, Heidelberg University, Im Neuenheimer Feld 229, 69120 Heidelberg, Germany
- Walter Schottky Institute and Physics Department, Technical University of Munich, Am Coulombwall 4, 85748 Garching by Munich, Germany
| | - Kevin Synnatschke
- School of Physics, Trinity College Dublin, The University of Dublin, Dublin 2, Ireland
- Applied Physical Chemistry, Heidelberg University, Im Neuenheimer Feld 253, 69120 Heidelberg, Germany
| | - Stanislav Bodnar
- Institute for Physical Chemistry, Heidelberg University, Im Neuenheimer Feld 229, 69120 Heidelberg, Germany
- Walter Schottky Institute and Physics Department, Technical University of Munich, Am Coulombwall 4, 85748 Garching by Munich, Germany
| | - Jonathan Zerhoch
- Institute for Physical Chemistry, Heidelberg University, Im Neuenheimer Feld 229, 69120 Heidelberg, Germany
- Walter Schottky Institute and Physics Department, Technical University of Munich, Am Coulombwall 4, 85748 Garching by Munich, Germany
| | - Lissa Eyre
- Walter Schottky Institute and Physics Department, Technical University of Munich, Am Coulombwall 4, 85748 Garching by Munich, Germany
- Electrical Engineering Division, University of Cambridge, 9 JJ Thomson Ave, Cambridge CB3 0FA, United Kingdom
| | - Felix Rauh
- Walter Schottky Institute and Physics Department, Technical University of Munich, Am Coulombwall 4, 85748 Garching by Munich, Germany
| | - Markus W Heindl
- Institute for Physical Chemistry, Heidelberg University, Im Neuenheimer Feld 229, 69120 Heidelberg, Germany
- Walter Schottky Institute and Physics Department, Technical University of Munich, Am Coulombwall 4, 85748 Garching by Munich, Germany
| | - Shangpu Liu
- Institute for Physical Chemistry, Heidelberg University, Im Neuenheimer Feld 229, 69120 Heidelberg, Germany
- Walter Schottky Institute and Physics Department, Technical University of Munich, Am Coulombwall 4, 85748 Garching by Munich, Germany
| | - Jan Konecny
- Department of Inorganic Chemistry, Faculty of Chemical Technology, University of Chemistry and Technology Prague, Technická 5, 166 28 Prague 6, Czech Republic
| | - Ian D Sharp
- Walter Schottky Institute and Physics Department, Technical University of Munich, Am Coulombwall 4, 85748 Garching by Munich, Germany
| | - Zdeněk Sofer
- Department of Inorganic Chemistry, Faculty of Chemical Technology, University of Chemistry and Technology Prague, Technická 5, 166 28 Prague 6, Czech Republic
| | - Claudia Backes
- Applied Physical Chemistry, Heidelberg University, Im Neuenheimer Feld 253, 69120 Heidelberg, Germany
- Physical Chemistry of Nanomaterials, University of Kassel, Heinrich-Plett-Straße 40, 34132 Kassel, Germany
| | - Felix Deschler
- Institute for Physical Chemistry, Heidelberg University, Im Neuenheimer Feld 229, 69120 Heidelberg, Germany
- Walter Schottky Institute and Physics Department, Technical University of Munich, Am Coulombwall 4, 85748 Garching by Munich, Germany
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Andris R, Averianov T, Zachman MJ, Pomerantseva E. Cation-Driven Assembly of Bilayered Vanadium Oxide and Graphene Oxide Nanoflakes to Form Two-Dimensional Heterostructure Electrodes for Li-Ion Batteries. ACS Appl Mater Interfaces 2023. [PMID: 37216415 DOI: 10.1021/acsami.2c22916] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Lithium preintercalated bilayered vanadium oxide (LVO or δ-LixV2O5·nH2O) and graphene oxide (GO) nanoflakes were assembled using a concentrated lithium chloride solution and annealed under vacuum at 200 °C to form two-dimensional (2D) δ-LixV2O5·nH2O and reduced GO (rGO) heterostructures. We found that the Li+ ions from LiCl enhanced the oxide/carbon heterointerface formation and served as stabilizing ions to improve structural and electrochemical stability. The graphitic content of the heterostructure could be easily controlled by changing the initial GO concentration prior to assembly. We found that increasing the GO content in our heterostructure composition helped inhibit the electrochemical degradation of LVO during cycling and improved the rate capability of the heterostructure. A combination of scanning electron microscopy and X-ray diffraction was used to help confirm that a 2D heterointerface formed between LVO and GO, and the final phase composition was determined using energy-dispersive X-ray spectroscopy and thermogravimetric analysis. Scanning transmission electron microscopy and electron energy-loss spectroscopy were additionally used to examine the heterostructures at high resolution, mapping the orientations of rGO and LVO layers and locally imaging their interlayer spacings. Further, electrochemical cycling of the cation-assembled LVO/rGO heterostructures in Li-ion cells with a non-aqueous electrolyte revealed that increasing the rGO content led to improved cycling stability and rate performance, despite slightly decreased charge storage capacity. The heterostructures with 0, 10, 20, and 35 wt % rGO exhibited capacities of 237, 216, 174, and 150 mAh g-1, respectively. Moreover, the LVO/rGO-35 wt % and LVO/rGO-20 wt % heterostructures retained 75% (110 mAh g-1) and 67% (120 mAh g-1) of their initial capacities after increasing the specific current from 20 to 200 mA g-1, while the LVO/rGO-10 wt % sample retained only 48% (107 mAh g-1) of its initial capacity under the same cycling conditions. In addition, the cation-assembled LVO/rGO electrodes exhibited enhanced electrochemical stability compared to electrodes prepared through physical mixing of LVO and GO nanoflakes in the same ratios as the heterostructure electrodes, further revealing the stabilizing effect of a 2D heterointerface. The cation-driven assembly approach, explored in this work using Li+ cations, was found to induce and stabilize the formation of stacked 2D layers of rGO and exfoliated LVO. The reported assembly methodology can be applied for a variety of systems utilizing 2D materials with complementary properties for applications as electrodes in energy storage devices.
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Affiliation(s)
- Ryan Andris
- Department of Materials Science and Engineering, Drexel University, Philadelphia, Pennsylvania 19104, United States
| | - Timofey Averianov
- Department of Materials Science and Engineering, Drexel University, Philadelphia, Pennsylvania 19104, United States
| | - Michael J Zachman
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Ekaterina Pomerantseva
- Department of Materials Science and Engineering, Drexel University, Philadelphia, Pennsylvania 19104, United States
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10
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Venkidusamy V, Nallusamy S, Nammalvar G, Veerabahu R, Thirumurugan A, Natarajan C, Dhanabalan SS, Pabba DP, Abarzúa CV, Kamaraj SK. ZnO/Graphene Composite from Solvent-Exfoliated Few-Layer Graphene Nanosheets for Photocatalytic Dye Degradation under Sunlight Irradiation. Micromachines (Basel) 2023; 14:189. [PMID: 36677250 PMCID: PMC9860591 DOI: 10.3390/mi14010189] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/27/2022] [Revised: 01/05/2023] [Accepted: 01/10/2023] [Indexed: 06/17/2023]
Abstract
ZnO/graphene nanocomposites were prepared using a facile approach. Graphene nanosheets were prepared by ultrasonication-based liquid phase exfoliation of graphite powder in a low boiling point organic solvent, 1,2-Dichloroethane, for the preparation of ZnO/graphene nanocomposites. Structural properties of the synthesized ZnO/graphene nanocomposites were studied through powder XRD and micro-Raman analysis. The characteristic Raman active modes of ZnO and graphene present in the micro-Raman spectra ensured the formation of ZnO/graphene nanocomposite and it is inferred that the graphene sheets in the composites were few layers in nature. Increasing the concentration of graphene influenced the surface morphology of the ZnO nanoparticles and a flower shape ZnO was formed on the graphene nanosheets of the composite with high graphene concentration. The efficiencies of the samples for the photocatalytic degradation of Methylene Blue dye under sunlight irradiation were investigated and 97% degradation efficiency was observed. The stability of the nanocomposites was evaluated by performing five cycles, and 92% degradation efficiency was maintained. The observed results were compared with that of ZnO/graphene composite derived from other methods.
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Affiliation(s)
- Vasanthi Venkidusamy
- Department of Physics, National Institute of Technology-Tiruchirappalli, Tiruchirappalli 620015, India
| | - Sivanantham Nallusamy
- Department of Physics, K. Ramakrishnan College of Engineering, Tiruchirappalli 621112, India
| | - Gopalakrishnan Nammalvar
- Department of Physics, National Institute of Technology-Tiruchirappalli, Tiruchirappalli 620015, India
| | | | - Arun Thirumurugan
- Sede Vallenar, Universidad de Atacama, Costanera #105, Vallenar 1612178, Chile
| | - Chidhambaram Natarajan
- Department of Physics, Rajah Serfoji Government College (Autonomous), Thanjavur 613005, India
| | | | - Durga Prasad Pabba
- Departamento de Ingeniería Mecánica, Facultad de Ingeniería, Universidad Tecnologica Metropolitana, Santiago 8330378, Chile
| | | | - Sathish-Kumar Kamaraj
- Centro de Investigación en Ciencia Aplicada y Tecnología Avanzada (CICATA)-Unidad Altamira, Instituto Politécnico Nacional (IPN), Carretera Tampico-Puerto Industrial Altamira Km 14.5, C. Manzano, Industrial Altamira, Altamira 89600, Mexico
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11
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Ng KL, Maciejewska BM, Qin L, Johnston C, Barrio J, Titirici MM, Tzanakis I, Eskin DG, Porfyrakis K, Mi J, Grobert N. Direct Evidence of the Exfoliation Efficiency and Graphene Dispersibility of Green Solvents toward Sustainable Graphene Production. ACS Sustain Chem Eng 2023; 11:58-66. [PMID: 36643002 PMCID: PMC9832534 DOI: 10.1021/acssuschemeng.2c03594] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Revised: 11/22/2022] [Indexed: 05/12/2023]
Abstract
Achieving a sustainable production of pristine high-quality graphene and other layered materials at a low cost is one of the bottlenecks that needs to be overcome for reaching 2D material applications at a large scale. Liquid phase exfoliation in conjunction with N-methyl-2-pyrrolidone (NMP) is recognized as the most efficient method for both the exfoliation and dispersion of graphene. Unfortunately, NMP is neither sustainable nor suitable for up-scaling production due to its adverse impact on the environment. Here, we show the real potential of green solvents by revealing the independent contributions of their exfoliation efficiency and graphene dispersibility to the graphene yield. By experimentally separating these two factors, we demonstrate that the exfoliation efficiency of a given solvent is independent of its dispersibility. Our studies revealed that isopropanol can be used to exfoliate graphite as efficiently as NMP. Our finding is corroborated by the matching ratio between the polar and dispersive energies of graphite and that of the solvent surface tension. This direct evidence of exfoliation efficiency and dispersibility of solvents paves the way to developing a deeper understanding of the real potential of sustainable graphene manufacturing at a large scale.
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Affiliation(s)
- Kai Ling Ng
- Department
of Materials, University of Oxford, Parks Road, OxfordOX1 3 PH, U.K.
| | | | - Ling Qin
- Department
of Engineering, University of Hull, Cottingham Road, HullHU6 7RX, U.K.
| | - Colin Johnston
- Department
of Materials, University of Oxford, Parks Road, OxfordOX1 3 PH, U.K.
| | - Jesus Barrio
- Department
of Chemical Engineering, Imperial College
London, South Kensington Campus, LondonSW7 2AZ, U.K.
| | - Maria-Magdalena Titirici
- Department
of Chemical Engineering, Imperial College
London, South Kensington Campus, LondonSW7 2AZ, U.K.
| | - Iakovos Tzanakis
- School
of Engineering, Computing and Mathematics, Oxford Brookes University, College Cl, Wheatley, OxfordOX33 1HX, U.K.
| | - Dmitry G Eskin
- Brunel
Centre for Advanced Solidification Technology, Brunel University London, Kingston Lane, UxbridgeUB8 3PH, U.K.
| | - Kyriakos Porfyrakis
- Faculty of
Engineering and Science, University of Greenwich, Central Avenue, Chatham Maritime, KentME4 4TB, U.K.
| | - Jiawei Mi
- Department
of Engineering, University of Hull, Cottingham Road, HullHU6 7RX, U.K.
| | - Nicole Grobert
- Department
of Materials, University of Oxford, Parks Road, OxfordOX1 3 PH, U.K.
- Williams
Advanced Engineering, Grove, OxfordshireOX12
0DQ, U.K.
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12
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Sousa SM, Morais HLO, Santos JCC, Barboza APM, Neves BRA, Pinto ES, Prado MC. Liquid phase exfoliation of talc: effect of the medium on flake size and shape. Beilstein J Nanotechnol 2023; 14:68-78. [PMID: 36761680 PMCID: PMC9843237 DOI: 10.3762/bjnano.14.8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/12/2022] [Accepted: 12/09/2022] [Indexed: 06/18/2023]
Abstract
Industrial applications of nanomaterials require large-scale production methods, such as liquid phase exfoliation (LPE). Regarding this, it is imperative to characterize the obtained materials to tailor parameters such as exfoliation medium, duration, and mechanical energy source to the desired applications. This work presents results of statistical analyses of talc flakes obtained by LPE in four different media. Talc is a phyllosilicate that can be exfoliated into nanoflakes with great mechanical properties. Sodium cholate at two different concentrations (below and at the critical micelar concentration), butanone, and Triton-X100 were employed as exfoliation medium for talc. Using recent published statistical analysis methods based on atomic force microscopy images of thousands of flakes, the shape and size distribution of nanotalc obtained using the four different media are compared. This comparison highlights the strengths and weaknesses of the media tested and hopefully will facilitate the choice of the medium for applications that have specific requirements.
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Affiliation(s)
- Samuel M Sousa
- Campus Santa Luzia, Instituto Federal de Minas Gerais, R. Érico Veríssimo, 317, Santa Luzia – MG, 33115-390, Brazil
| | - Helane L O Morais
- Campus Santa Luzia, Instituto Federal de Minas Gerais, R. Érico Veríssimo, 317, Santa Luzia – MG, 33115-390, Brazil
| | - Joyce C C Santos
- Centro de Desenvolvimento da Tecnologia Nuclear CDTN/CNEN, Avenida Antônio Carlos, 6627, Belo Horizonte, Minas Gerais 31270-901, Brazil
| | - Ana Paula M Barboza
- Physics Department, Universidade Federal de Ouro Preto, R. Diogo de Vasconcelos, 122, Ouro Preto – MG, 35400-000, Brazil
| | - Bernardo R A Neves
- Physics Department, Universidade Federal de Minas Gerais, Avenida Antônio Carlos, 6627, Belo Horizonte – MG, 31270-901, Brazil
| | - Elisângela S Pinto
- Campus Ouro Preto, Instituto Federal de Minas Gerais, R. Pandiá Calógeras, 898, Ouro Preto – MG, 35400-000, Brazil
| | - Mariana C Prado
- Physics Department, Universidade Federal de Ouro Preto, R. Diogo de Vasconcelos, 122, Ouro Preto – MG, 35400-000, Brazil
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13
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Shu K, Tian S, Wang Y, Fei G, Sun L, Niu H, Duan Y, Hu G, Wang H. Graphene Composite via Bacterial Cellulose Assisted Liquid Phase Exfoliation for Sodium-Ion Batteries. Polymers (Basel) 2022; 15. [PMID: 36616551 DOI: 10.3390/polym15010203] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 12/19/2022] [Accepted: 12/21/2022] [Indexed: 01/04/2023] Open
Abstract
One of the most critical challenges for commercialization of sodium-ion battery (SIB) is to develop carbon anodes with high capacity and good rate performance. Graphene would be an excellent SIB anode candidate due to its success in various kinds of batteries. Liquid-phase exfoliation (LPE) method is an inexpensive, facile and potentially scalable method to produce less-defected graphene sheets. In this work, we developed an improved, dispersant-assisted LPE method to produce graphene composite materials from raw graphite with high yield and better quality for SIB anode. Here, bacterial cellulose (BC) was used as a green dispersant/stabilizer for LPE, a "spacer" for anti-restacking, as well as a carbon precursor in the composite. As a result, the carbonized BC (CBC)/LPE graphene (LEGr) presented improved performance compared to composite with graphene prepared by Hummers method. It exhibited a specific capacity of 233 mAh g-1 at a current density of 20 mA g-1, and 157 mAh g-1 after 200 cycles at a high current density of 100 mA g-1 with capacity retention rate of 87.73%. This method not only provides new insight in graphene composites preparation, but also takes a new step in the exploration of anode materials for sodium-ion batteriesSIBs.
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14
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Gürünlü B, Taşdelen-Yücedağ Ç, Bayramoğlu M. One Pot Synthesis of Graphene through Microwave Assisted Liquid Exfoliation of Graphite in Different Solvents. Molecules 2022; 27:molecules27155027. [PMID: 35956975 PMCID: PMC9370801 DOI: 10.3390/molecules27155027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Revised: 07/31/2022] [Accepted: 08/03/2022] [Indexed: 11/16/2022]
Abstract
This study presents an easy and quick method for the synthesis of graphene from graphite in a set of solvents, including n-Hexadecane (n-Hexa), dimethylsulfoxide (DMSO), sodium hydroxide (NaOH), 1-octanol (OCTA), perchloric acid (PA), N,N-Dimethylformamide (DMF), ethylene glycol (EG), and ethylene diamine (ED), via microwave (MW) energy. The properties of final products were determined by X-ray diffraction spectroscopy (XRD), Fourier transform infrared spectroscopy (FTIR), ultraviolet-visible (UV-Vis) spectroscopy, and the four-point probe technique. The XRD spectra of most of the MW-assisted graphene products showed peaks at 2θ = 26.5° and 54°. Layer numbers extend from 2 and 25, and the leading comes about were gotten by having two-layered products, named as graphene synthesized in dimethylsulfoxide (G-DMSO), graphene synthesized in ethylene glycol (G-EG), and graphene synthesized in 1-octanol (G-OCTA). G-DMF has the highest electrical conductivity with 22 S/m. The electrical conductivity is higher when the dipole moment of the used solvent is between 2 and 4 Debye (D). The FTIR spectra of most of the MW-assisted graphene products are in line with commercial graphene (CG). The UV-Vis spectra of all MW-assisted graphene products showed a peak at 223 nm referring to characteristic sp2 C=C bonds and 273 nm relating to the n → π * transition of C-O bonds.
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Affiliation(s)
- Betül Gürünlü
- Bioengineering Department, Üsküdar University, Altunizade Mah. Üniversite Sok., Üsküdar, Istanbul 34662, Turkey
- Correspondence: ; Tel.: +90-544-354-9288
| | | | - Mahmut Bayramoğlu
- Chemical Engineering Department, Gebze Technical University, Gebze 41400, Turkey
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15
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Balakrishnan P, Sanij FD, Chang Z, Leung PK, Su H, Xing L, Xu Q. Nano-Graphene Layer from Facile, Scalable and Eco-Friendly Liquid Phase Exfoliation Strategy as Effective Barrier Layer for High-Performance and Durable Direct Liquid Alcohol Fuel Cells. Molecules 2022; 27:3044. [PMID: 35566394 DOI: 10.3390/molecules27093044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/27/2022] [Revised: 04/28/2022] [Accepted: 05/03/2022] [Indexed: 11/23/2022]
Abstract
Graphene, in spite of exceptional physio-chemical properties, still faces great limitations in its use and industrial scale-up as highly selective membranes (enhanced ratio of proton conductivity to fuel cross-over) in liquid alcohol fuel cells (LAFCs), due to complexity and high cost of prevailing production methods. To resolve these issues, a facile, low-cost and eco-friendly approach of liquid phase exfoliation (bath sonication) of graphite to obtain graphene and spray depositing the prepared graphene flakes, above anode catalyst layer (near the membrane in the membrane electrode assembly (MEA)) as barrier layer at different weight percentages relative to the base membrane Nafion 115 was utilized in this work. The 5 wt.% nano-graphene layer raises 1 M methanol/oxygen fuel cell power density by 38% to 91 mW·cm−2, compared to standard membrane electrode assembly (MEA) performance of 63 mW·cm−2, owing to less methanol crossover with mild decrease in proton conductivity, showing negligible voltage decays over 20 h of operation at 50 mA·cm−2. Overall, this work opens three prominent favorable prospects: exploring the usage of nano-materials prepared by liquid phase exfoliation approach, their effective usage in ion-transport membrane region of MEA and enhancing fuel cell power performance.
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16
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Ogilvie SP, Large MJ, O’Mara MA, Sehnal AC, Amorim Graf A, Lynch PJ, Cass AJ, Salvage JP, Alfonso M, Poulin P, King AAK, Dalton AB. Nanosheet-Stabilized Emulsions: Near-Minimum Loading and Surface Energy Design of Conductive Networks. ACS Nano 2022; 16:1963-1973. [PMID: 35107970 PMCID: PMC9007533 DOI: 10.1021/acsnano.1c06519] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Accepted: 01/28/2022] [Indexed: 06/14/2023]
Abstract
Here, we develop a framework for assembly, understanding, and application of functional emulsions stabilized by few-layer pristine two-dimensional (2D) nanosheets. Liquid-exfoliated graphene and MoS2 are demonstrated to stabilize emulsions at ultralow nanosheet volume fractions, approaching the minimum loading achievable with 2D materials. These nanosheet-stabilized emulsions allow controlled droplet deposition free from the coffee ring effect to facilitate single-droplet devices from minute quantities of material or assembly into large-area films with high network conductivity. To broaden the range of compositions and subsequent applications, an understanding of emulsion stability and orientation in terms of surface energy of the three phases is developed. Importantly, this model facilitates determination of the surface energies of the nanosheets themselves and identifies strategies based on surface tension and pH to allow design of emulsion structures. Finally, this approach is used to prepare conductive silicone emulsion composites with a record-low loading level and excellent electromechanical sensitivity. The versatility of these nanosheet-stabilized emulsions illustrates their potential for low-loading composites, thin-film formation and surface energy determination, and the design of functional structures for a range of segregated network applications.
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Affiliation(s)
| | | | | | | | | | | | - Adam J. Cass
- University
of Sussex, Brighton BN1 9RH, United Kingdom
| | | | - Marco Alfonso
- Centre
de Recherche Paul Pascal - CNRS, University of Bordeaux, 33600 Pessac, France
| | - Philippe Poulin
- Centre
de Recherche Paul Pascal - CNRS, University of Bordeaux, 33600 Pessac, France
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17
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Rao VJ, Qi H, Berger FJ, Grieger S, Kaiser U, Backes C, Zaumseil J. Liquid Phase Exfoliation of Rubrene Single Crystals into Nanorods and Nanobelts. ACS Nano 2021; 15:20466-20477. [PMID: 34813291 DOI: 10.1021/acsnano.1c08965] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Liquid phase exfoliation (LPE) is a popular method to create dispersions of two-dimensional nanosheets from layered inorganic van der Waals crystals. Here, it is applied to orthorhombic and triclinic single crystals of the organic semiconductor rubrene with only noncovalent interactions (mainly π-π) between the molecules. Distinct nanorods and nanobelts of rubrene are formed, stabilized against aggregation in aqueous sodium cholate solution, and isolated by liquid cascade centrifugation. Selected-area electron diffraction and Raman spectroscopy confirm the crystallinity of the rubrene nanorods and nanobelts while the optical properties (absorbance, photoluminescence) of the dispersions are similar to rubrene solutions due to their randomized orientations. The formation of these stable crystalline rubrene nanostructures with only a few molecular layers by LPE confirms that noncovalent interactions in molecular crystals can be strong enough to enable mechanical exfoliation similar to inorganic layered materials.
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Affiliation(s)
- Vaishnavi J Rao
- Institute for Physical Chemistry, Universität Heidelberg, D-69120 Heidelberg, Germany
| | - Haoyuan Qi
- Central Facility of Materials Science Electron Microscopy, Universität Ulm, 89081 Ulm, Germany
- Center for Advancing Electronics Dresden & Faculty of Chemistry and Food Chemistry, Technische Universität Dresden, 01062 Dresden, Germany
| | - Felix J Berger
- Institute for Physical Chemistry, Universität Heidelberg, D-69120 Heidelberg, Germany
| | - Sebastian Grieger
- Institute for Physical Chemistry, Universität Heidelberg, D-69120 Heidelberg, Germany
| | - Ute Kaiser
- Central Facility of Materials Science Electron Microscopy, Universität Ulm, 89081 Ulm, Germany
| | - Claudia Backes
- Institute for Physical Chemistry, Universität Heidelberg, D-69120 Heidelberg, Germany
| | - Jana Zaumseil
- Institute for Physical Chemistry, Universität Heidelberg, D-69120 Heidelberg, Germany
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18
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Martín-Pérez L, Burzurí E. Optimized Liquid-Phase Exfoliation of Magnetic van der Waals Heterostructures: Towards the Single Layer and Deterministic Fabrication of Devices. Molecules 2021; 26:molecules26237371. [PMID: 34885953 PMCID: PMC8658876 DOI: 10.3390/molecules26237371] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2021] [Revised: 11/23/2021] [Accepted: 12/02/2021] [Indexed: 11/22/2022] Open
Abstract
Van der Waals magnetic materials are promising candidates for spintronics and testbeds for exotic magnetic phenomena in low dimensions. The two-dimensional (2D) limit in these materials is typically reached by mechanically breaking the van der Waals interactions between layers. Alternative approaches to producing large amounts of flakes rely on wet methods such as liquid-phase exfoliation (LPE). Here, we report an optimized route for obtaining monolayers of magnetic cylindrite by LPE. We show that the selection of exfoliation times is the determining factor in producing a statistically significant amount of monolayers while keeping relatively big flake areas (~1 µm2). We show that the cylindrite lattice is preserved in the flakes after LPE. To study the electron transport properties, we have fabricated field-effect transistors based on LPE cylindrite. Flakes are deterministically positioned between nanoscale electrodes by dielectrophoresis. We show that dielectrophoresis can selectively move the larger flakes into the devices. Cylindrite nanoscale flakes present a p-doped semiconducting behaviour, in agreement with the mechanically exfoliated counterparts. Alternating current (AC) admittance spectroscopy sheds light on the role played by potential barriers between different flakes in terms of electron transport properties. The present large-scale exfoliation and device fabrication strategy can be extrapolated to other families of magnetic materials.
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Affiliation(s)
- Lucía Martín-Pérez
- IMDEA Nanociencia, Campus de Cantoblanco, Calle Faraday 9, 28049 Madrid, Spain;
| | - Enrique Burzurí
- IMDEA Nanociencia, Campus de Cantoblanco, Calle Faraday 9, 28049 Madrid, Spain;
- Departamento de Física de la Materia Condensada, Universidad Autónoma de Madrid, 28049 Madrid, Spain
- Correspondence:
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19
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Wang H, Song T, Li Z, Qiu J, Zhao Y, Zhang H, Wang J. Exceptional High and Reversible Ammonia Uptake by Two Dimension Few-layer BiI 3 Nanosheets. ACS Appl Mater Interfaces 2021; 13:25918-25925. [PMID: 34048224 DOI: 10.1021/acsami.1c03261] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The emission of NH3 into atmosphere is seriously harmful for human health and public safety, thus the capture and recovery of NH3 from ammonia emissions is highly desirable. In recent years, many kinds of solid adsorbents have been exploited to absorb NH3. However, these materials do not show the advantages of high uptake capacity and good recyclability at the same time. Here, nontoxic and low cost few-layer BiI3 nanosheets have been prepared from bulk BiI3 powder by a simple and efficient liquid phase exfoliation strategy using green solvents and then applied for the NH3 capture for the first time. The results show that the adsorption capacity of NH3 of BiI3 nanosheets reaches up to 22.6 mmol/g at 1.0 bar and 25 °C, which approaches the record value for NH3 adsorption. Importantly, the NH3 uptake in BiI3 nanosheets is completely reversible and no clear loss in uptake capacity is observed after 10 cycles of adsorption-desorption. Furthermore, the BiI3 nanosheets exhibit remarkable selectivity for the separation of NH3/CO2 at 70 °C with theoretical selectivity coefficient of 700, which is promising for the selective separation of NH3 and CO2 in hot tail gas of some industrial processes. Mechanism studies indicate that such superior NH3 capacity, excellent reversibility and remarkable selectivity are primarily attributed to the Bi3+-NH3 coordination interactions.
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Affiliation(s)
- Huiyong Wang
- Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Henan Key Laboratory of Green Chemistry, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University, 46 Jianshe Road, Xinxiang, Henan 453007, P. R. China
| | - Tao Song
- Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Henan Key Laboratory of Green Chemistry, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University, 46 Jianshe Road, Xinxiang, Henan 453007, P. R. China
| | - Zhiyong Li
- Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Henan Key Laboratory of Green Chemistry, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University, 46 Jianshe Road, Xinxiang, Henan 453007, P. R. China
| | - Jikuan Qiu
- Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Henan Key Laboratory of Green Chemistry, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University, 46 Jianshe Road, Xinxiang, Henan 453007, P. R. China
| | - Yang Zhao
- Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Henan Key Laboratory of Green Chemistry, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University, 46 Jianshe Road, Xinxiang, Henan 453007, P. R. China
| | - Hucheng Zhang
- Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Henan Key Laboratory of Green Chemistry, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University, 46 Jianshe Road, Xinxiang, Henan 453007, P. R. China
| | - Jianji Wang
- Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Henan Key Laboratory of Green Chemistry, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University, 46 Jianshe Road, Xinxiang, Henan 453007, P. R. China
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20
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Ott S, Lakmann M, Backes C. Impact of Pretreatment of the Bulk Starting Material on the Efficiency of Liquid Phase Exfoliation of WS 2. Nanomaterials (Basel) 2021; 11:nano11051072. [PMID: 33921953 PMCID: PMC8143503 DOI: 10.3390/nano11051072] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Revised: 04/15/2021] [Accepted: 04/16/2021] [Indexed: 12/16/2022]
Abstract
Liquid phase exfoliation (LPE) is widely used to produce colloidal dispersions of nanomaterials, in particular two-dimensional nanosheets. The degree of exfoliation, i.e., the length to thickness aspect ratio was shown to be intrinsically limited by the ratio of in-plane to out-of-plane binding strength. In this work, we investigate whether simple pretreatment of the starting material can be used to change the in-plane to out-of-plane binding strength through mild intercalation to improve the sample quality in sonication-assisted LPE. Five different pretreatment conditions of WS2 were tested and the dispersions size-selected through centrifugation. From optical spectroscopy (extinction, Raman, photoluminescence), information on nanosheet dimension (average lateral size, layer number, monolayer size) and optical quality (relative photoluminescence quantum yield) was extracted. We find that the pretreatment has a minor impact on the length/thickness aspect ratio, but that photoluminescence quantum yield can be increased in particular using mild sonication conditions. We attribute this to the successful exfoliation of nanosheets with a lower degree of basal plane defectiveness. This work emphasizes the complexity of the exfoliation process and suggests that the role of defects has to be considered for a comprehensive picture.
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21
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Nie X, Li G, Jiang Z, Li W, Ouyang T, Wang J. Co-Solvent Exfoliation of Hexagonal Boron Nitride: Effect of Raw Bulk Boron Nitride Size and Co-Solvent Composition. Nanomaterials (Basel) 2020; 10:E1035. [PMID: 32481653 PMCID: PMC7352847 DOI: 10.3390/nano10061035] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/25/2020] [Revised: 05/20/2020] [Accepted: 05/23/2020] [Indexed: 01/10/2023]
Abstract
Exfoliation of two-dimensional boron nitride nanosheets (BNNSs) from parent bulk material has been receiving intensive attention because of its fascinating physical properties. Liquid exfoliation is a simple, scalable approach to produce single-layer or few-layer BNNS. In this paper, water/propanol co-solvent exfoliation of bulk boron nitride under the assistance of sonication was investigated in detail. Special attention was paid on the effect of raw bulk boron nitride size and co-solvent composition. The results show that sonication of small-size hexagonal boron nitride tends to generate large nanosheets, due to a predominant solvent wedge effect. In addition, it is found that the composition of water/propanol co-solvent has an important effect on exfoliation efficiency. Interestingly, although two isomers of 1-propanol (NPA) and 2-propanol (IPA) have the same molecular weight and similar surface tension, their aqueous solutions allow the formation of boron nitride nanosheets dispersion with markedly different concentrations. It is proposed that due to their spatial configuration difference, NPA with its longer molecular chain and fewer hydrophobic methyl group tends to form dynamic water-NPA clusters with larger size than water-IPA clusters. The hydrodynamic radius of the co-solvent "clusters" was calculated to be 0.72 nm for water/NPA system and 0.44 nm for water/IPA system at their maximum, respectively. Their size changes, represented by two curves, indicate a strong "cluster size" effect on exfoliation efficiency. Our work provides an insight into co-solvent exfoliation of hexagonal boron nitride and emphasizes the importance of co-solvent cluster size in exfoliation efficiency.
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Affiliation(s)
- Xiang Nie
- College of Materials Science and Engineering, Hunan University, Changsha 410082, China; (X.N.); (G.L.); (Z.J.); (W.L.); (J.W.)
- Hunan Province Key Laboratory for Advanced Carbon Materials and Applied Technology, Hunan University, Changsha 410082, China
| | - Guo Li
- College of Materials Science and Engineering, Hunan University, Changsha 410082, China; (X.N.); (G.L.); (Z.J.); (W.L.); (J.W.)
- Hunan Province Key Laboratory for Advanced Carbon Materials and Applied Technology, Hunan University, Changsha 410082, China
| | - Zhao Jiang
- College of Materials Science and Engineering, Hunan University, Changsha 410082, China; (X.N.); (G.L.); (Z.J.); (W.L.); (J.W.)
| | - Wei Li
- College of Materials Science and Engineering, Hunan University, Changsha 410082, China; (X.N.); (G.L.); (Z.J.); (W.L.); (J.W.)
- Hunan Province Key Laboratory for Advanced Carbon Materials and Applied Technology, Hunan University, Changsha 410082, China
| | - Ting Ouyang
- College of Materials Science and Engineering, Hunan University, Changsha 410082, China; (X.N.); (G.L.); (Z.J.); (W.L.); (J.W.)
- Hunan Province Key Laboratory for Advanced Carbon Materials and Applied Technology, Hunan University, Changsha 410082, China
| | - Jianfeng Wang
- College of Materials Science and Engineering, Hunan University, Changsha 410082, China; (X.N.); (G.L.); (Z.J.); (W.L.); (J.W.)
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22
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Lange RZ, Synnatschke K, Qi H, Huber N, Hofer G, Liang B, Huck C, Pucci A, Kaiser U, Backes C, Schlüter AD. Enriching and Quantifying Porous Single Layer 2D Polymers by Exfoliation of Chemically Modified van der Waals Crystals. Angew Chem Int Ed Engl 2020; 59:5683-5695. [PMID: 31821673 PMCID: PMC7154524 DOI: 10.1002/anie.201912705] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2019] [Revised: 11/26/2019] [Indexed: 01/11/2023]
Abstract
2D polymer sheets with six positively charged pyrylium groups at each pore edge in a stacked single crystal can be transformed into a 2D polymer with six pyridines per pore by exposure to gaseous ammonia. This reaction furnishes still a crystalline material with tunable protonation degree at regular nano-sized pores promising as separation membrane. The exfoliation is compared for both 2D polymers with the latter being superior. Its liquid phase exfoliation yields nanosheet dispersions, which can be size-selected using centrifugation cascades. Monolayer contents of ≈30 % are achieved with ≈130 nm sized sheets in mg quantities, corresponding to tens of trillions of monolayers. Quantification of nanosheet sizes, layer number and mass shows that this exfoliation is comparable to graphite. Thus, we expect that recent advances in exfoliation of graphite or inorganic crystals (e.g. scale-up, printing etc.) can be directly applied to this 2D polymer as well as to covalent organic frameworks.
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Affiliation(s)
- Ralph Z. Lange
- Institute for PolymersETH ZürichVladimir-Prelog-Weg 58093ZürichSwitzerland
| | - Kevin Synnatschke
- Institute of Physical ChemistryHeidelberg UniversityIm Neuenheimer Feld 25369120HeidelbergGermany
| | - Haoyuan Qi
- Central Facility of Electron MicroscopyElectron Microscopy Group of Materials ScienceUlm UniversityAlbert-Einstein-Allee 1189081UlmGermany
| | - Niklas Huber
- Institute for PolymersETH ZürichVladimir-Prelog-Weg 58093ZürichSwitzerland
| | - Gregor Hofer
- Institute for PolymersETH ZürichVladimir-Prelog-Weg 58093ZürichSwitzerland
- X-ray Platform D-MATLDepartment of MaterialsETH ZürichVladimir-Prelog-Weg 58093ZürichSwitzerland
| | - Baokun Liang
- Central Facility of Electron MicroscopyElectron Microscopy Group of Materials ScienceUlm UniversityAlbert-Einstein-Allee 1189081UlmGermany
| | - Christian Huck
- Kirchhoff Institute of PhysicsHeidelberg UniversityIm Neuenheimer Feld 22769120HeidelbergGermany
| | - Annemarie Pucci
- Kirchhoff Institute of PhysicsHeidelberg UniversityIm Neuenheimer Feld 22769120HeidelbergGermany
| | - Ute Kaiser
- Central Facility of Electron MicroscopyElectron Microscopy Group of Materials ScienceUlm UniversityAlbert-Einstein-Allee 1189081UlmGermany
| | - Claudia Backes
- Institute of Physical ChemistryHeidelberg UniversityIm Neuenheimer Feld 25369120HeidelbergGermany
| | - A. Dieter Schlüter
- Institute for PolymersETH ZürichVladimir-Prelog-Weg 58093ZürichSwitzerland
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23
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Wang Y, Zhang X, Liu H, Zhang X. SMA-Assisted Exfoliation of Graphite by Microfluidization for Efficient and Large-Scale Production of High-Quality Graphene. Nanomaterials (Basel) 2019; 9:nano9121653. [PMID: 31766336 PMCID: PMC6955778 DOI: 10.3390/nano9121653] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/29/2019] [Revised: 11/15/2019] [Accepted: 11/18/2019] [Indexed: 01/21/2023]
Abstract
In this paper, the sodium salt of styrene-maleic anhydride copolymer (SMA) was used as a stabilizer in the process of graphite exfoliation to few-layer graphene using the technique of microfluidization in water. This method is simple, scalable, and cost-effective, and it produces graphene at concentrations as high as 0.522 mg mL-1. The generated high-quality graphene consists of few-layer sheets with a uniform size of less than 1 μm. The obtained graphene was uniformly dispersed and tightly integrated into a polyamide 66 (PA66) matrix to create high-performance multifunctional polymer nanocomposites. The tensile strength and thermal conductivity of 0.3 and 0.5 wt% EG/PA66 composites were found to be ~32.6% and ~28.8% greater than the corresponding values calculated for pure PA66, respectively. This confirms that the new protocol of liquid phase exfoliation of graphite has excellent potential for use in the industrial-scale production of high-quality graphene for numerous applications.
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Affiliation(s)
- Yuzhou Wang
- State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin 300387, China; (Y.W.); (X.Z.); (H.L.)
- Municipal Key Laboratory of Advanced Fiber and Energy Storage Technology, Tianjin 300387, China
- School of Material Science and Engineering, Tiangong University, Tianjin 300387, China
| | - Xianye Zhang
- State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin 300387, China; (Y.W.); (X.Z.); (H.L.)
- Municipal Key Laboratory of Advanced Fiber and Energy Storage Technology, Tianjin 300387, China
- School of Material Science and Engineering, Tiangong University, Tianjin 300387, China
| | - Haihui Liu
- State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin 300387, China; (Y.W.); (X.Z.); (H.L.)
- Municipal Key Laboratory of Advanced Fiber and Energy Storage Technology, Tianjin 300387, China
- School of Material Science and Engineering, Tiangong University, Tianjin 300387, China
| | - Xingxiang Zhang
- State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin 300387, China; (Y.W.); (X.Z.); (H.L.)
- Municipal Key Laboratory of Advanced Fiber and Energy Storage Technology, Tianjin 300387, China
- School of Material Science and Engineering, Tiangong University, Tianjin 300387, China
- Correspondence: ; Tel.: +86-022-8395-5238
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24
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Fu X, Zhang L, Cho HD, Kang TW, Fu D, Lee D, Lee SW, Li L, Qi T, Chan AS, Yunusov ZA, Panin GN. Molybdenum Disulfide Nanosheet/Quantum Dot Dynamic Memristive Structure Driven by Photoinduced Phase Transition. Small 2019; 15:e1903809. [PMID: 31539209 DOI: 10.1002/smll.201903809] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2019] [Revised: 08/31/2019] [Indexed: 06/10/2023]
Abstract
MoS2 2D nanosheets (NS) with intercalated 0D quantum dots (QDs) represent promising structures for creating low-dimensional (LD) resistive memory devices. Nonvolatile memristors based 2D materials demonstrate low power consumption and ultrahigh density. Here, the observation of a photoinduced phase transition in the 2D NS/0D QDs MoS2 structure providing dynamic resistive memory is reported. The resistive switching of the MoS2 NS/QD structure is observed in an electric field and can be controlled through local QD excitations. Photoexcitation of the LD structure at different laser power densities leads to a reversible MoS2 2H-1T phase transition and demonstrates the potential of the LD structure for implementing a new dynamic ultrafast photoresistive memory. The dynamic LD photomemristive structure is attractive for real-time pattern recognition and photoconfiguration of artificial neural networks in a wide spectral range of sensitivity provided by QDs.
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Affiliation(s)
- Xiao Fu
- Nano Information Technology Academy, Quantum-Functional Semiconductor Research Center, Department of Physics, Dongguk University, 3-26 Pildong, Jung-Gu, Seoul, 04620, Republic of Korea
| | - Lei Zhang
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Key Laboratory for the Green Preparation and Application of Functional Materials, School of Materials Science and Engineering, Hubei University, No. 368, Friendship Avenue, Wuhan, 430061, P. R. China
| | - Hak D Cho
- Nano Information Technology Academy, Quantum-Functional Semiconductor Research Center, Department of Physics, Dongguk University, 3-26 Pildong, Jung-Gu, Seoul, 04620, Republic of Korea
| | - Tae Won Kang
- Nano Information Technology Academy, Quantum-Functional Semiconductor Research Center, Department of Physics, Dongguk University, 3-26 Pildong, Jung-Gu, Seoul, 04620, Republic of Korea
| | - Dejun Fu
- Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education and Hubei Key Laboratory of Nuclear Solid Physics, School of Physics and Technology, Wuhan University, Bayi Road 299, Wuhan, 430072, China
| | - Dongjin Lee
- Nano Information Technology Academy, Quantum-Functional Semiconductor Research Center, Department of Physics, Dongguk University, 3-26 Pildong, Jung-Gu, Seoul, 04620, Republic of Korea
| | - Sang Wuk Lee
- Nano Information Technology Academy, Quantum-Functional Semiconductor Research Center, Department of Physics, Dongguk University, 3-26 Pildong, Jung-Gu, Seoul, 04620, Republic of Korea
| | - Luying Li
- Center for Nanoscale Characterization & Devices Wuhan National Laboratory for Optoelectronics Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan, 430074, China
| | - Tianyu Qi
- Center for Nanoscale Characterization & Devices Wuhan National Laboratory for Optoelectronics Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan, 430074, China
| | - Abdul S Chan
- Electrical Engineering Department, Sukkur IBA University, Airport Road, Sukkur, 65200, Pakistan
| | - Ziyodbek A Yunusov
- Nano Information Technology Academy, Quantum-Functional Semiconductor Research Center, Department of Physics, Dongguk University, 3-26 Pildong, Jung-Gu, Seoul, 04620, Republic of Korea
| | - Gennady N Panin
- Nano Information Technology Academy, Quantum-Functional Semiconductor Research Center, Department of Physics, Dongguk University, 3-26 Pildong, Jung-Gu, Seoul, 04620, Republic of Korea
- Institute of Microelectronics Technology and High-Purity Materials, Russian Academy of Sciences, Chernogolovka, Moscow district, 142432, Russia
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25
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Zhao HR, Ding JH, Shao ZZ, Xu BY, Zhou QB, Yu HB. High-Quality Boron Nitride Nanosheets and Their Bioinspired Thermally Conductive Papers. ACS Appl Mater Interfaces 2019; 11:37247-37255. [PMID: 31508934 DOI: 10.1021/acsami.9b11180] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Hexagonal boron nitride has displayed increased potential in heat dissipation applications due to its desirable high thermal conductivity and remarkable thermal stability. However, the large-yield and high-quality preparation of boron nitride nanosheets (BNNSs) has been still an enormous challenge. In present work, we developed a universal exfoliation strategy to synthesize few-layer and defect-free BNNSs, which involved the intercalation of hexafluorosilicates/sodium hydroxide into BN crystals followed by exfoliation through a mild stirring process. The yield and concentration of as-obtained BNNS reached up to 78.5% and 12.78 mg/mL, respectively. More importantly, this method has been proven to exfoliate other layered materials like graphene (G), MoS2, and WS2. These as-obtained BNNSs can be directly used for constructing freestanding papers with high thermal conductivities. Typically, the thermal conductivities of the BNNS-G hybrid paper were up to 63.5 W/mK along the in-plane direction and 7.4 W/mK along the through-plane direction. According to the thermal interface materials performance measures, BNNS-G hybrid paper shows great promising applications for heat transfer in integrated circuit packaging.
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Affiliation(s)
- Hong-Ran Zhao
- Key Laboratory of Marine Materials and Related Technologies, Zhejiang Key Laboratory of Marine Materials and Protective Technologies , Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences , Ningbo 315201 , China
| | - Ji-Heng Ding
- Key Laboratory of Marine Materials and Related Technologies, Zhejiang Key Laboratory of Marine Materials and Protective Technologies , Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences , Ningbo 315201 , China
| | - Zhen-Zong Shao
- Key Laboratory of Marine Materials and Related Technologies, Zhejiang Key Laboratory of Marine Materials and Protective Technologies , Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences , Ningbo 315201 , China
| | - Bei-Yu Xu
- Key Laboratory of Marine Materials and Related Technologies, Zhejiang Key Laboratory of Marine Materials and Protective Technologies , Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences , Ningbo 315201 , China
| | - Qing-Bo Zhou
- Key Laboratory of Marine Materials and Related Technologies, Zhejiang Key Laboratory of Marine Materials and Protective Technologies , Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences , Ningbo 315201 , China
| | - Hai-Bin Yu
- Key Laboratory of Marine Materials and Related Technologies, Zhejiang Key Laboratory of Marine Materials and Protective Technologies , Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences , Ningbo 315201 , China
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26
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Zheng X, Wang G, Huang F, Liu H, Gong C, Wen S, Hu Y, Zheng G, Chen D. Liquid Phase Exfoliated Hexagonal Boron Nitride/Graphene Heterostructure Based Electrode Toward Asymmetric Supercapacitor Application. Front Chem 2019; 7:544. [PMID: 31428602 PMCID: PMC6688068 DOI: 10.3389/fchem.2019.00544] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2019] [Accepted: 07/16/2019] [Indexed: 11/14/2022] Open
Abstract
In this paper, owing to the electrostatic interaction between graphene and h-BN, a facile liquid phase exfoliation method was carried out to fabricate h-BN/graphene based van der Waals heterostructure nanocomposites without additional chemical cross-linkers. The physicochemical properties of as-prepared composites were characterized by several electron microscopic and spectroscopic measurements. The h-BN/graphene heterostructure composites were employed to use as the anodes of asymmetric supercapacitor, and exhibited exceptional capacitive performance due to their synergistic effects. It is expected that the as-prepared h-BN/graphene materials can boost scalable heterostructure electrodes in supercapacitors, and our liquid phase exfoliation method can be used for the construction of the other energy storage and electronics.
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Affiliation(s)
- Xuan Zheng
- Hubei Provincial Key Laboratory of Green Materials for Light Industry, School of Materials and Chemical Engineering, Hubei University of Technology, Wuhan, China
| | - Guangjin Wang
- School of Materials Science and Energy Engineering, Foshan University, Foshan, China.,College of Chemistry and Materials Science, Hubei Engineering University, Xiaogan, China
| | - Fei Huang
- Key Laboratory of Functional Foods, Ministry of Agriculture, Guangdong Key Laboratory of Agricultural Products Processing, Sericultural & Agri-Food Research Institute Guangdong Academy of Agricultural Sciences, Guangzhou, China
| | - Hai Liu
- College of Chemistry and Materials Science, Hubei Engineering University, Xiaogan, China
| | - Chunli Gong
- College of Chemistry and Materials Science, Hubei Engineering University, Xiaogan, China
| | - Sheng Wen
- College of Chemistry and Materials Science, Hubei Engineering University, Xiaogan, China
| | - Yuanqiang Hu
- College of Chemistry and Materials Science, Hubei Engineering University, Xiaogan, China
| | - Genwen Zheng
- College of Chemistry and Materials Science, Hubei Engineering University, Xiaogan, China
| | - Dongchu Chen
- School of Materials Science and Energy Engineering, Foshan University, Foshan, China
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27
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Dhar N, Syed N, Mohiuddin M, Jannat A, Zavabeti A, Zhang BY, Datta RS, Atkin P, Mahmood N, Esrafilzadeh D, Daeneke T, Kalantar-Zadeh K. Exfoliation Behavior of van der Waals Strings: Case Study of Bi 2S 3. ACS Appl Mater Interfaces 2018; 10:42603-42611. [PMID: 30426735 DOI: 10.1021/acsami.8b14702] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The family of crystals constituting covalently bound strings, held together by van der Waals forces, can be exfoliated into smaller entities, similar to crystals made of van der Waals sheets. Depending on the anisotropy of such crystals, as well as the spacing between their strings in each direction, van der Waals sheets or ribbons can be obtained after the exfoliation process. In this work, we demonstrate that ultrathin nanoribbons of bismuth sulfide (Bi2S3) can be synthesized via a high-power sonication process. The thickness and width of these ribbons are governed by the van der Waals spacings around the strings within the parent crystal. The lengths of the nanoribbons are initially limited by the dimensions of the starting bulk particles. Interestingly, these nanoribbons change stoichiometry and composition and are elongated when the duration of agitation increases because of Ostwald ripening. An application of the exfoliated van der Waals strings is presented for optical biosensing using photoluminescence of Bi2S3 nanoribbons, reaching detection limits of less than 10 nM L-1 in response to bovine serum albumin. The concept of exfoliating van der Waals strings could be extended to a large class of crystals for creating bodies ranging from sheets to strings, with optoelectronic properties different from that of their bulk counterparts.
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Affiliation(s)
- Nripen Dhar
- School of Engineering , RMIT University , Melbourne , Victoria 3000 , Australia
| | - Nitu Syed
- School of Engineering , RMIT University , Melbourne , Victoria 3000 , Australia
| | - Md Mohiuddin
- School of Engineering , RMIT University , Melbourne , Victoria 3000 , Australia
| | - Azmira Jannat
- School of Engineering , RMIT University , Melbourne , Victoria 3000 , Australia
| | - Ali Zavabeti
- School of Engineering , RMIT University , Melbourne , Victoria 3000 , Australia
| | - Bao Yue Zhang
- School of Engineering , RMIT University , Melbourne , Victoria 3000 , Australia
| | - Robi S Datta
- School of Engineering , RMIT University , Melbourne , Victoria 3000 , Australia
| | - Paul Atkin
- School of Engineering , RMIT University , Melbourne , Victoria 3000 , Australia
| | - Nasir Mahmood
- School of Engineering , RMIT University , Melbourne , Victoria 3000 , Australia
| | - Dorna Esrafilzadeh
- School of Engineering , RMIT University , Melbourne , Victoria 3000 , Australia
| | - Torben Daeneke
- School of Engineering , RMIT University , Melbourne , Victoria 3000 , Australia
| | - Kourosh Kalantar-Zadeh
- School of Engineering , RMIT University , Melbourne , Victoria 3000 , Australia
- School of Chemical Engineering , University of New South Wales (UNSW) , Kensington , New South Wales 2052 , Australia
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28
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Kang J, Wells SA, Sangwan VK, Lam D, Liu X, Luxa J, Sofer Z, Hersam MC. Solution-Based Processing of Optoelectronically Active Indium Selenide. Adv Mater 2018; 30:e1802990. [PMID: 30095182 DOI: 10.1002/adma.201802990] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2018] [Revised: 07/23/2018] [Indexed: 05/24/2023]
Abstract
Layered indium selenide (InSe) presents unique properties for high-performance electronic and optoelectronic device applications. However, efforts to process InSe using traditional liquid phase exfoliation methods based on surfactant-assisted aqueous dispersions or organic solvents with high boiling points compromise electronic properties due to residual surface contamination and chemical degradation. Here, these limitations are overcome by utilizing a surfactant-free, low boiling point, deoxygenated cosolvent system. The resulting InSe flakes and thin films possess minimal processing residues and are structurally and chemically pristine. When employed in photodetectors, individual InSe nanosheets exhibit a maximum photoresponsivity of ≈5 × 107 A W-1 , which is the highest value of any solution-processed monolithic semiconductor to date. Furthermore, the surfactant-free cosolvent system not only stabilizes InSe dispersions but is also amenable to the assembly of electronically percolating InSe flake arrays without posttreatment, which enables the realization of ultrahigh performance thin-film photodetectors. This surfactant-free, deoxygenated cosolvent approach can be generalized to other layered materials, thereby presenting additional opportunities for solution-processed thin-film electronic and optoelectronic technologies.
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Affiliation(s)
- Joohoon Kang
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL, 60208, USA
| | - Spencer A Wells
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL, 60208, USA
| | - Vinod K Sangwan
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL, 60208, USA
| | - David Lam
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL, 60208, USA
| | - Xiaolong Liu
- Applied Physics Graduate Program, Northwestern University, Evanston, IL, 60208, USA
| | - Jan Luxa
- Department of Inorganic Chemistry, University of Chemistry and Technology Prague, Technicka 5, 166 28 Prague 6, Czech Republic
| | - Zdeněk Sofer
- Department of Inorganic Chemistry, University of Chemistry and Technology Prague, Technicka 5, 166 28 Prague 6, Czech Republic
| | - Mark C Hersam
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL, 60208, USA
- Applied Physics Graduate Program, Northwestern University, Evanston, IL, 60208, USA
- Department of Chemistry, Electrical Engineering and Computer Science, Northwestern University, Evanston, IL, 60208, USA
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29
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Carey T, Jones C, Le Moal F, Deganello D, Torrisi F. Spray-Coating Thin Films on Three-Dimensional Surfaces for a Semitransparent Capacitive-Touch Device. ACS Appl Mater Interfaces 2018; 10:19948-19956. [PMID: 29745645 PMCID: PMC6057686 DOI: 10.1021/acsami.8b02784] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Here, we formulate low surface tension (∼30 mN/m) and low boiling point (∼79 °C) inks of graphene, single-wall carbon nanotubes and conductive polymer poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) and demonstrate their viability for spray-coating of morphologically uniform ( Sq ≈ 48 ± 3 nm), transparent conducting films (TCFs) at room temperature (∼20 °C), which conform to three dimensional curved surfaces. Large area (∼750 cm2) hybrid PEDOT:PSS/graphene films achieved an optical transmission of 67% in the UV and 64% in the near-infrared wavelengths with a conductivity of ∼104 S/m. Finally, we demonstrate the spray-coating of TCFs as an electrode on the inside of a poly(methyl methacrylate) sphere, enabling a semitransparent (around 360°) and spherical touch sensor for interactive devices.
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Affiliation(s)
- Tian Carey
- Cambridge Graphene
Centre, University of Cambridge, Cambridge CB3 0FA, U.K.
| | - Chris Jones
- Novalia Ltd, Impington, Cambridge CB24 9N, U.K.
| | | | - Davide Deganello
- Welsh Centre for Printing and Coating,
College of Engineering, Swansea University, Swansea SA1 8EN, U.K.
| | - Felice Torrisi
- Cambridge Graphene
Centre, University of Cambridge, Cambridge CB3 0FA, U.K.
- E-mail:
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30
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Yin L, Hai X, Chang K, Ichihara F, Ye J. Synergetic Exfoliation and Lateral Size Engineering of MoS 2 for Enhanced Photocatalytic Hydrogen Generation. Small 2018; 14:e1704153. [PMID: 29493112 DOI: 10.1002/smll.201704153] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2017] [Revised: 01/18/2018] [Indexed: 06/08/2023]
Abstract
Generally, exfoliation is an efficient strategy to create more edge site so as to expose more active sites on molybdenum disulphide (MoS2 ). However, the lateral sizes of the resultant MoS2 monolayers are relatively large (≈50-500 nm), which retain great potential to release more active sites. To further enhance the catalytic performance of MoS2 , a facile cascade centrifugation-assisted liquid phase exfoliation method is introduced here to fabricate monolayer enriched MoS2 nanosheets with nanoscale lateral sizes. The as-prepared MoS2 revealed a high monolayer yield of 36% and small average lateral sizes ranging from 42 to 9 nm under gradient centrifugations, all exhibiting superior catalytic performances toward photocatalytic H2 generation. Particularly, the optimized monolayer MoS2 with an average lateral size of 9 nm achieves an apparent quantum efficiency as high as 77.2% on cadmium sulphide at 420 nm. This work demonstrates that the catalytic performances of MoS2 could be dramatically enhanced by synergistic exfoliation and lateral size engineering as a result of increased density of active sites and shortened charge diffusion distance, paving a new way for design and fabrication of transition-metal dichalcogenides-based materials in the application of hydrogen generation.
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Affiliation(s)
- Lisha Yin
- Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (NanjingTech), 30 South Puzhu Road, Nanjing, 211816, P. R. China
- International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki, 305-0044, Japan
| | - Xiao Hai
- International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki, 305-0044, Japan
| | - Kun Chang
- International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki, 305-0044, Japan
| | - Fumihiko Ichihara
- International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki, 305-0044, Japan
| | - Jinhua Ye
- International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki, 305-0044, Japan
- Graduate School of Chemical Science and Engineering, Hokkaido University, Sapporo, 060-0814, Japan
- TU-NIMS International Collaboration Laboratory, School of Materials Science and Engineering, Tianjin University, Tianjin, 300072, P. R. China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin, 300072, P. R. China
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31
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Villani F, Schiattarella C, Polichetti T, Capua RD, Loffredo F, Alfano B, Miglietta ML, Massera E, Verdoliva L, Francia GD. Study of the correlation between sensing performance and surface morphology of inkjet-printed aqueous graphene-based chemiresistors for NO 2 detection. Beilstein J Nanotechnol 2017; 8:1023-1031. [PMID: 28546896 PMCID: PMC5433170 DOI: 10.3762/bjnano.8.103] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/29/2016] [Accepted: 04/19/2017] [Indexed: 06/07/2023]
Abstract
The extremely high sensitivity to the external environment and the high specific surface area, as well as the absence of bulk phenomena that could interfere with the response signal, make graphene highly attractive for the applications in the field of sensing. Among the various methods for producing graphene over large areas, liquid phase exfoliation (LPE) appears to be very promising, especially if combined with inkjet printing (IJP), which offers several advantages, including the selective and controlled deposition of small ink volumes and the versatility of the exploitable inks and substrates. Herein we present a feasibility study of chemiresistive gas sensors inkjet-printed onto paper substrates, in which a LPE graphene suspension dispersed in a water/isopropanol (H2O/IPA) mixture is used as sensing ink. The device performances, in terms of relative conductance variations, upon exposure to NO2 at standard ambient temperature and pressure, are analysed. In addition, we examine the effect of the substrate morphology and, more specifically, of the ink/substrate interaction on the device performances, by comparing the response of different chemiresistors fabricated by dispensing the same suspension also onto Al2O3 and Si/SiO2 substrates and carrying out a supportive atomic force microscopy analysis. The results prove the possibility to produce sensor devices by means of a wholly environmentally friendly, low-cost process that meets the requests coming from the increasing field of paper-based electronics and paving the way towards a flexible, green-by-design mass production.
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Affiliation(s)
- F Villani
- ENEA - R.C. Portici, Piazzale E. Fermi 1, I-80055, Portici (Naples), Italy
| | - C Schiattarella
- Dipartimento di Fisica "E. Pancini", Università di Napoli "Federico II", Via Cintia, I-80126, Naples, Italy
| | - T Polichetti
- ENEA - R.C. Portici, Piazzale E. Fermi 1, I-80055, Portici (Naples), Italy
| | - R Di Capua
- Dipartimento di Fisica "E. Pancini", Università di Napoli "Federico II", Via Cintia, I-80126, Naples, Italy
- CNR-SPIN UOS Napoli, Via Cintia, I-80126, Naples, Italy
| | - F Loffredo
- ENEA - R.C. Portici, Piazzale E. Fermi 1, I-80055, Portici (Naples), Italy
| | - B Alfano
- ENEA - R.C. Portici, Piazzale E. Fermi 1, I-80055, Portici (Naples), Italy
| | - M L Miglietta
- ENEA - R.C. Portici, Piazzale E. Fermi 1, I-80055, Portici (Naples), Italy
| | - E Massera
- ENEA - R.C. Portici, Piazzale E. Fermi 1, I-80055, Portici (Naples), Italy
| | - L Verdoliva
- ENEA - R.C. Portici, Piazzale E. Fermi 1, I-80055, Portici (Naples), Italy
| | - G Di Francia
- ENEA - R.C. Portici, Piazzale E. Fermi 1, I-80055, Portici (Naples), Italy
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32
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Yang R, Wang B, Xiang J, Mu C, Zhang C, Wen F, Wang C, Su C, Liu Z. Fabrication of NiCo 2-Anchored Graphene Nanosheets by Liquid-Phase Exfoliation for Excellent Microwave Absorbers. ACS Appl Mater Interfaces 2017; 9:12673-12679. [PMID: 28346825 DOI: 10.1021/acsami.6b16144] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Graphene nanosheets (GNSs) were prepared by an efficient liquid-phase exfoliation method, and then the NiCo2/GNS nanohybrids were fabricated using the single-mode microwave-assisted hydrothermal technique. The NiCo2/GNS composites with different GNS proportions were investigated as microwave absorbers. Morphology investigation suggested that NiCo2 nanocrystals were uniformly anchored on the GNS without aggregation. The electromagnetic parameters of NiCo2/GNS nanohybrids could be artificially adjusted by changing the GNS proportion, which led to an exceptional microwave-absorbing performance. A reflection loss (RL) exceeding -20 dB was obtained in the frequency range of 5.3-16.4 GHz for the absorber thicknesses of 1.2-3.2 mm, while an optimal RL of -30 dB was achieved at 11.7 GHz for a thickness of 1.6 mm. The enhanced microwave-absorbing performance indicated that the NiCo2/10 wt % GNS composite has great potential for use as an excellent microwave absorber.
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Affiliation(s)
- Ruilong Yang
- State Key Laboratory of Metastable Materials Science and Technology and ‡School of Science, Yanshan University , Qinhuangdao 066004, People's Republic of China
| | - Bochong Wang
- State Key Laboratory of Metastable Materials Science and Technology and ‡School of Science, Yanshan University , Qinhuangdao 066004, People's Republic of China
| | - Jianyong Xiang
- State Key Laboratory of Metastable Materials Science and Technology and ‡School of Science, Yanshan University , Qinhuangdao 066004, People's Republic of China
| | - Congpu Mu
- State Key Laboratory of Metastable Materials Science and Technology and ‡School of Science, Yanshan University , Qinhuangdao 066004, People's Republic of China
| | - Can Zhang
- State Key Laboratory of Metastable Materials Science and Technology and ‡School of Science, Yanshan University , Qinhuangdao 066004, People's Republic of China
| | - Fusheng Wen
- State Key Laboratory of Metastable Materials Science and Technology and ‡School of Science, Yanshan University , Qinhuangdao 066004, People's Republic of China
| | - Cong Wang
- State Key Laboratory of Metastable Materials Science and Technology and ‡School of Science, Yanshan University , Qinhuangdao 066004, People's Republic of China
| | - Can Su
- State Key Laboratory of Metastable Materials Science and Technology and ‡School of Science, Yanshan University , Qinhuangdao 066004, People's Republic of China
| | - Zhongyuan Liu
- State Key Laboratory of Metastable Materials Science and Technology and ‡School of Science, Yanshan University , Qinhuangdao 066004, People's Republic of China
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33
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Wang M, Xu X, Ge Y, Dong P, Baines R, Ajayan PM, Ye M, Shen J. Surface Tension Components Ratio: An Efficient Parameter for Direct Liquid Phase Exfoliation. ACS Appl Mater Interfaces 2017; 9:9168-9175. [PMID: 28240533 DOI: 10.1021/acsami.6b16578] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Direct liquid phase exfoliation (LPE) is generally regarded as an effective and efficient methodology for preparing single- to few-layered nanosheets on a large scale. Based on a previous finding that the polar and dispersive components of surface tension can be used as critical parameters for screening suitable solvents for LPE, in this study, we conducted in-depth research on direct LPE of two-dimensional (2D) materials by the extensive LPE of a series of 2D materials and the thorough comparison of their surfaces properties and LPE efficiencies. We rationally developed the surface tension component matching (STCM) theory, and in nature, its key point lies in the close ratio of polar to dispersive components (P/D) between the solvents and the aimed 2D materials. To this end, the surface tension components ratio is demonstrated to be an effective parameter for screening LPE solvents. In addition to the optimization of the LPE process for these 2D materials, this work has further greatly enlarged the comprehensive library for the solvent and 2D material matching pairs based on the improved STCM theory.
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Affiliation(s)
- Man Wang
- Institute of Special Materials and Technology, Fudan University , Shanghai 200433, China
| | - Xiaowei Xu
- Institute of Special Materials and Technology, Fudan University , Shanghai 200433, China
| | - Yuancai Ge
- Institute of Special Materials and Technology, Fudan University , Shanghai 200433, China
| | - Pei Dong
- Department of Materials Science and NanoEngineering, Rice University , 6100 Main Street, Houston, Texas 77005, United States
| | - Robert Baines
- Department of Materials Science and NanoEngineering, Rice University , 6100 Main Street, Houston, Texas 77005, United States
| | - Pulickel M Ajayan
- Department of Materials Science and NanoEngineering, Rice University , 6100 Main Street, Houston, Texas 77005, United States
| | - Mingxin Ye
- Institute of Special Materials and Technology, Fudan University , Shanghai 200433, China
| | - Jianfeng Shen
- Institute of Special Materials and Technology, Fudan University , Shanghai 200433, China
- Department of Materials Science and NanoEngineering, Rice University , 6100 Main Street, Houston, Texas 77005, United States
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Liu Y, He X, Hanlon D, Harvey A, Coleman JN, Li Y. Liquid Phase Exfoliated MoS2 Nanosheets Percolated with Carbon Nanotubes for High Volumetric/Areal Capacity Sodium-Ion Batteries. ACS Nano 2016; 10:8821-8. [PMID: 27541502 DOI: 10.1021/acsnano.6b04577] [Citation(s) in RCA: 95] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
The search for high-capacity, low-cost electrode materials for sodium-ion batteries is a significant challenge in energy research. Among the many potential candidates, layered compounds such as MoS2 have attracted increasing attention. However, such materials have not yet fulfilled their true potential. Here, we show that networks of liquid phase exfoliated MoS2 nanosheets, reinforced with 20 wt % single-wall carbon nanotubes (SWNTs), can be formed into sodium-ion battery electrodes with large gravimetric, volumetric, and areal capacity. The MoS2/SWNT composite films are highly porous, electrically conductive, and mechanically robust due to its percolating carbon nanotube network. When directly employed as the working electrode, they exhibit a specific capacity of >400 mAh/g and volumetric capacity of ∼650 mAh/cm(3). Their mechanical stability allows them to be processed into free-standing films with tunable thickness up to ∼100 μm, corresponding to an areal loading of 15 mg/cm(2). Their high electrical conductivity allows the high volumetric capacity to be retained, even at high thickness, resulting in state-of-the-art areal capacities of >4.0 mAh/cm(2). Such values are competitive with their lithium-ion counterparts.
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Affiliation(s)
- Yuping Liu
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University , Suzhou 215123, China
| | - Xiaoyun He
- School of Physics, CRANN and AMBER Centers, Trinity College Dublin , Dublin 2, Ireland
| | - Damien Hanlon
- School of Physics, CRANN and AMBER Centers, Trinity College Dublin , Dublin 2, Ireland
| | - Andrew Harvey
- School of Physics, CRANN and AMBER Centers, Trinity College Dublin , Dublin 2, Ireland
| | - Jonathan N Coleman
- School of Physics, CRANN and AMBER Centers, Trinity College Dublin , Dublin 2, Ireland
| | - Yanguang Li
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University , Suzhou 215123, China
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35
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Shen J, Wu J, Wang M, Dong P, Xu J, Li X, Zhang X, Yuan J, Wang X, Ye M, Vajtai R, Lou J, Ajayan PM. Surface Tension Components Based Selection of Cosolvents for Efficient Liquid Phase Exfoliation of 2D Materials. Small 2016; 12:2741-9. [PMID: 27059403 DOI: 10.1002/smll.201503834] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/2015] [Revised: 03/06/2016] [Indexed: 05/21/2023]
Abstract
A proper design of direct liquid phase exfoliation (LPE) for 2D materials as graphene, MoS2 , WS2 , h-BN, Bi2 Se3 , MoSe2 , SnS2 , and TaS2 with common cosolvents is carried out based on considering the polar and dispersive components of surface tensions of various cosolvents and 2D materials. It has been found that the exfoliation efficiency is enhanced by matching the ratio of surface tension components of cosolvents to that of the targeted 2D materials, based on which common cosolvents composed of IPA/water, THF/water, and acetone/water can be designed for sufficient LPE process. In this context, the library of low-toxic and low-cost solvents with low boiling points for LPE is infinitely enlarged when extending to common cosolvents. Polymer-based composites reinforced with a series of different 2D materials are compared with each other. It is demonstrated that the incorporation of cosolvents-exfoliated 2D materials can substantially improve the mechanical and thermal properties of polymer matrices. Typically, with the addition of 0.5 wt% of such 2D material as MoS2 nanosheets, the tensile strength and Young's modulus increased up to 74.85% and 136.97%, respectively. The different enhancement effect of 2D materials is corresponded to the intrinsic properties and LPE capacity of 2D materials.
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Affiliation(s)
- Jianfeng Shen
- Department of Materials Science and NanoEngineering, Rice University, 6100 Main Street, Houston, TX, 77005, USA
- Institute of Special Materials and Technology, Fudan University, Shanghai, 200433, P. R. China
| | - Jingjie Wu
- Department of Materials Science and NanoEngineering, Rice University, 6100 Main Street, Houston, TX, 77005, USA
| | - Man Wang
- Institute of Special Materials and Technology, Fudan University, Shanghai, 200433, P. R. China
| | - Pei Dong
- Department of Materials Science and NanoEngineering, Rice University, 6100 Main Street, Houston, TX, 77005, USA
| | - Jingxuan Xu
- Institute of Special Materials and Technology, Fudan University, Shanghai, 200433, P. R. China
| | - Xiaoguang Li
- Institute of Special Materials and Technology, Fudan University, Shanghai, 200433, P. R. China
| | - Xiang Zhang
- Department of Materials Science and NanoEngineering, Rice University, 6100 Main Street, Houston, TX, 77005, USA
| | - Junhua Yuan
- Department of Materials Science and NanoEngineering, Rice University, 6100 Main Street, Houston, TX, 77005, USA
| | - Xifan Wang
- Department of Materials Science and NanoEngineering, Rice University, 6100 Main Street, Houston, TX, 77005, USA
| | - Mingxin Ye
- Institute of Special Materials and Technology, Fudan University, Shanghai, 200433, P. R. China
| | - Robert Vajtai
- Department of Materials Science and NanoEngineering, Rice University, 6100 Main Street, Houston, TX, 77005, USA
| | - Jun Lou
- Department of Materials Science and NanoEngineering, Rice University, 6100 Main Street, Houston, TX, 77005, USA
| | - Pulickel M Ajayan
- Department of Materials Science and NanoEngineering, Rice University, 6100 Main Street, Houston, TX, 77005, USA
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36
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Kang J, Wells SA, Wood JD, Lee JH, Liu X, Ryder CR, Zhu J, Guest JR, Husko CA, Hersam MC. Stable aqueous dispersions of optically and electronically active phosphorene. Proc Natl Acad Sci U S A 2016; 113:11688-93. [PMID: 27092006 DOI: 10.1073/pnas.1602215113] [Citation(s) in RCA: 180] [Impact Index Per Article: 22.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Understanding and exploiting the remarkable optical and electronic properties of phosphorene require mass production methods that avoid chemical degradation. Although solution-based strategies have been developed for scalable exfoliation of black phosphorus, these techniques have thus far used anhydrous organic solvents in an effort to minimize exposure to known oxidants, but at the cost of limited exfoliation yield and flake size distribution. Here, we present an alternative phosphorene production method based on surfactant-assisted exfoliation and postprocessing of black phosphorus in deoxygenated water. From comprehensive microscopic and spectroscopic analysis, this approach is shown to yield phosphorene dispersions that are stable, highly concentrated, and comparable to micromechanically exfoliated phosphorene in structure and chemistry. Due to the high exfoliation efficiency of this process, the resulting phosphorene flakes are thinner than anhydrous organic solvent dispersions, thus allowing the observation of layer-dependent photoluminescence down to the monolayer limit. Furthermore, to demonstrate preservation of electronic properties following solution processing, the aqueous-exfoliated phosphorene flakes are used in field-effect transistors with high drive currents and current modulation ratios. Overall, this method enables the isolation and mass production of few-layer phosphorene, which will accelerate ongoing efforts to realize a diverse range of phosphorene-based applications.
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Fabbro A, Scaini D, León V, Vázquez E, Cellot G, Privitera G, Lombardi L, Torrisi F, Tomarchio F, Bonaccorso F, Bosi S, Ferrari AC, Ballerini L, Prato M. Graphene-Based Interfaces Do Not Alter Target Nerve Cells. ACS Nano 2016; 10:615-623. [PMID: 26700626 DOI: 10.1021/acsnano.5b05647] [Citation(s) in RCA: 96] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Neural-interfaces rely on the ability of electrodes to transduce stimuli into electrical patterns delivered to the brain. In addition to sensitivity to the stimuli, stability in the operating conditions and efficient charge transfer to neurons, the electrodes should not alter the physiological properties of the target tissue. Graphene is emerging as a promising material for neuro-interfacing applications, given its outstanding physico-chemical properties. Here, we use graphene-based substrates (GBSs) to interface neuronal growth. We test our GBSs on brain cell cultures by measuring functional and synaptic integrity of the emerging neuronal networks. We show that GBSs are permissive interfaces, even when uncoated by cell adhesion layers, retaining unaltered neuronal signaling properties, thus being suitable for carbon-based neural prosthetic devices.
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Affiliation(s)
- Alessandra Fabbro
- International School for Advanced Studies (SISSA/ISAS) , Trieste 34136, Italy
- Department of Chemical and Pharmaceutical Sciences, University of Trieste , Trieste 34127, Italy
| | - Denis Scaini
- International School for Advanced Studies (SISSA/ISAS) , Trieste 34136, Italy
- Life Science Department, University of Trieste , Trieste 34127, Italy
- NanoInnovation Laboratory, ELETTRA Synchrotron Light Source , Trieste 34149, Italy
| | - Verónica León
- Department of Organic Chemisty, University of Castilla-La Mancha , Ciudad Real 13071, Spain
| | - Ester Vázquez
- Department of Organic Chemisty, University of Castilla-La Mancha , Ciudad Real 13071, Spain
| | - Giada Cellot
- International School for Advanced Studies (SISSA/ISAS) , Trieste 34136, Italy
| | - Giulia Privitera
- Cambridge Graphene Centre, University of Cambridge , Cambridge CB3 0FA, United Kingdom
| | - Lucia Lombardi
- Cambridge Graphene Centre, University of Cambridge , Cambridge CB3 0FA, United Kingdom
| | - Felice Torrisi
- Cambridge Graphene Centre, University of Cambridge , Cambridge CB3 0FA, United Kingdom
| | - Flavia Tomarchio
- Cambridge Graphene Centre, University of Cambridge , Cambridge CB3 0FA, United Kingdom
| | - Francesco Bonaccorso
- Cambridge Graphene Centre, University of Cambridge , Cambridge CB3 0FA, United Kingdom
- Istituto Italiano di Tecnologia, Graphene Labs , Genova 16163, Italy
| | - Susanna Bosi
- Department of Chemical and Pharmaceutical Sciences, University of Trieste , Trieste 34127, Italy
| | - Andrea C Ferrari
- Cambridge Graphene Centre, University of Cambridge , Cambridge CB3 0FA, United Kingdom
| | - Laura Ballerini
- International School for Advanced Studies (SISSA/ISAS) , Trieste 34136, Italy
- Life Science Department, University of Trieste , Trieste 34127, Italy
| | - Maurizio Prato
- Department of Chemical and Pharmaceutical Sciences, University of Trieste , Trieste 34127, Italy
- Carbon Nanobiotechnology Laboratory, CIC biomaGUNE , Paseo de Miramón 182, 20009 Donostia-San Sebastian, Spain
- Basque Foundation for Science, Ikerbasque , Bilbao 48013, Spain
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38
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Shen J, He Y, Wu J, Gao C, Keyshar K, Zhang X, Yang Y, Ye M, Vajtai R, Lou J, Ajayan PM. Liquid Phase Exfoliation of Two-Dimensional Materials by Directly Probing and Matching Surface Tension Components. Nano Lett 2015; 15:5449-5454. [PMID: 26200657 DOI: 10.1021/acs.nanolett.5b01842] [Citation(s) in RCA: 205] [Impact Index Per Article: 22.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Exfoliation of two-dimensional (2D) materials into mono- or few layers is of significance for both fundamental studies and potential applications. In this report, for the first time surface tension components were directly probed and matched to predict solvents with effective liquid phase exfoliation (LPE) capability for 2D materials such as graphene, h-BN, WS2, MoS2, MoSe2, Bi2Se3, TaS2, and SnS2. Exfoliation efficiency is enhanced when the ratios of the surface tension components of the applied solvent is close to that of the 2D material in question. We enlarged the library of low-toxic and common solvents for LPE. Our study provides distinctive insight into LPE and has pioneered a rational strategy for LPE of 2D materials with high yield.
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Affiliation(s)
- Jianfeng Shen
- †Department of Materials Science and NanoEngineering, Rice University, 6100 Main Street, Houston, Texas 77005, United States
- ‡Center of Special Materials and Technology, Fudan University, Shanghai 200433, People's Republic of China
| | - Yongmin He
- †Department of Materials Science and NanoEngineering, Rice University, 6100 Main Street, Houston, Texas 77005, United States
- §School of Physical Science and Technology, Lanzhou University, Lanzhou 730000, People's Republic of China
| | - Jingjie Wu
- †Department of Materials Science and NanoEngineering, Rice University, 6100 Main Street, Houston, Texas 77005, United States
| | - Caitian Gao
- §School of Physical Science and Technology, Lanzhou University, Lanzhou 730000, People's Republic of China
| | - Kunttal Keyshar
- †Department of Materials Science and NanoEngineering, Rice University, 6100 Main Street, Houston, Texas 77005, United States
| | - Xiang Zhang
- †Department of Materials Science and NanoEngineering, Rice University, 6100 Main Street, Houston, Texas 77005, United States
| | - Yingchao Yang
- †Department of Materials Science and NanoEngineering, Rice University, 6100 Main Street, Houston, Texas 77005, United States
| | - Mingxin Ye
- ‡Center of Special Materials and Technology, Fudan University, Shanghai 200433, People's Republic of China
| | - Robert Vajtai
- †Department of Materials Science and NanoEngineering, Rice University, 6100 Main Street, Houston, Texas 77005, United States
| | - Jun Lou
- †Department of Materials Science and NanoEngineering, Rice University, 6100 Main Street, Houston, Texas 77005, United States
| | - Pulickel M Ajayan
- †Department of Materials Science and NanoEngineering, Rice University, 6100 Main Street, Houston, Texas 77005, United States
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