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He Y, Andrade AF, Ménard-Moyon C, Bianco A. Biocompatible 2D Materials via Liquid Phase Exfoliation. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024; 36:e2310999. [PMID: 38457626 DOI: 10.1002/adma.202310999] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [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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2
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Dash BS, Lu YJ, Huang YS, Chen JP. Chitosan-coated magnetic graphene oxide for targeted delivery of doxorubicin as a nanomedicine approach to treat glioblastoma. Int J Biol Macromol 2024; 260:129401. [PMID: 38224798 DOI: 10.1016/j.ijbiomac.2024.129401] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Revised: 01/08/2024] [Accepted: 01/09/2024] [Indexed: 01/17/2024]
Abstract
In this study, magnetic graphene oxide (mGO) was first prepared and modified with chitosan to prepare chitosan-coated mGO (mGOC). Gastrin-releasing peptide (GRP)-conjugated mGOC (mGOCG) was then prepared from mGOC. The chemo drug doxorubicin (DOX) was adsorbed to mGOCG surface for dual active/magnetic targeted drug delivery. The DOX loading to mGOCG is 1.71 mg/mg, and drug release is pH-sensitive to facilitate drug delivery in endosomes. In vitro studies confirmed enhanced mGOCG endocytosis by U87 glioblastoma cells, with which enhanced cytotoxicity towards cancer cells could be achieved. This could be revealed from the drastically reduced half-maximal inhibitory concentration of mGOCG/DOX compared with DOX and mGOC/DOX. Furthermore, mGOCG/DOX can be localized under the influence of a magnetic field (MF) to exert this cytotoxic effect. An orthotopic brain tumor model by implanting U87 cells in the intracranial area of BALB/c nude mice was used to study the in vivo anti-tumor efficacy by intravenous injection of different samples and followed with bioluminescence imaging. The tumor size in the mGOCG/DOX + MF group demonstrated the best potency to suppress tumor growth and prolong animal survival time compared with mGOCG/DOX, mGOC/DOX, or DOX groups, indicating this new dual-targeting delivery system for DOX can effectively treat glioblastoma.
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Affiliation(s)
- Banendu Sunder Dash
- Department of Chemical and Materials Engineering, Chang Gung University, Kwei-San, Taoyuan 33302, Taiwan
| | - Yu-Jen Lu
- Department of Neurosurgery, Chang Gung Memorial Hospital, Linkou, Kwei-San, Taoyuan 33305, Taiwan
| | - Ya-Shu Huang
- Department of Chemical and Materials Engineering, Chang Gung University, Kwei-San, Taoyuan 33302, Taiwan
| | - Jyh-Ping Chen
- Department of Chemical and Materials Engineering, Chang Gung University, Kwei-San, Taoyuan 33302, Taiwan; Department of Neurosurgery, Chang Gung Memorial Hospital, Linkou, Kwei-San, Taoyuan 33305, Taiwan; Craniofacial Research Center, Chang Gung Memorial Hospital, Linkou, Kwei-San, Taoyuan 33305, Taiwan; Research Center for Food and Cosmetic Safety, College of Human Ecology, Chang Gung University of Science and Technology, Taoyuan 33302, Taiwan; Department of Materials Engineering, Ming Chi University of Technology, Tai-Shan, New Taipei City 24301, Taiwan.
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3
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Zhao F, Quan H, Zhang S, Xu Y, Zhou Z, Chen G, Li Q. Watered-Based Graphene Dispersion Stabilized by a Graft Co-Polymer for Electrically Conductive Screen Printing. Polymers (Basel) 2023; 15:polym15020356. [PMID: 36679238 PMCID: PMC9860939 DOI: 10.3390/polym15020356] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Revised: 12/20/2022] [Accepted: 12/22/2022] [Indexed: 01/12/2023] Open
Abstract
Graphene conductive inks have attracted significant attention in recent years due to their high conductivity, corrosion resistance, and environmentally friendly nature. However, the dispersion of graphene in aqueous solution is still challenging. In this work, we synthesized an amphiphilic graft copolymer, polyvinyl alcohol-g-polyaniline (PVA-g-PANI), and studied the graphene dispersion prepared with the graft copolymer by high-speed shear dispersion. The amphiphilic graft copolymer can be used as a stabilizer and adhesive agent in graphene dispersion. Given the steric hindrance of the graft copolymer, the stability of graphene dispersion is improved by decreasing the probability of π-π stacking. PVA-g-PANI has a better stability on graphene dispersion than carboxymethylcellulose sodium (CMC-Na) and a mixture of PVA and PANI. The graft copolymer has only a slight effect on the conductivity of graphene dispersion due to the existence of conductive PANI, which is beneficial for preparing the graphene dispersion with good conductivity and adhesion. Graphene dispersion is well-adapted to screen printing and is very stable with regard to the sheet resistance bending cycle.
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Affiliation(s)
- Fengfeng Zhao
- College of Material Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Hui Quan
- Sinopec (Beijing) Research Institute of Chemical Industry Co., Ltd., Beijing 100013, China
| | - Shijun Zhang
- Sinopec (Beijing) Research Institute of Chemical Industry Co., Ltd., Beijing 100013, China
| | - Yihui Xu
- Sinopec Group, Beijing 100728, China
| | - Zheng Zhou
- College of Material Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Guangxin Chen
- College of Material Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China
- Correspondence: (G.C.); (Q.L.)
| | - Qifang Li
- College of Material Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China
- Correspondence: (G.C.); (Q.L.)
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4
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Perumal S, Atchudan R, Ramalingam S, Aldawood S, Devarajan N, Lee W, Lee YR. Silver nanoparticles loaded graphene-poly-vinylpyrrolidone composites as an effective recyclable antimicrobial agent. ENVIRONMENTAL RESEARCH 2023; 216:114706. [PMID: 36336094 DOI: 10.1016/j.envres.2022.114706] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Revised: 10/19/2022] [Accepted: 10/30/2022] [Indexed: 06/16/2023]
Abstract
Silver nanoparticles (AgNPs) are often used as antibacterial agents. Here, graphene-silver nanoparticles (G-Ag) and graphene-silver nanoparticles poly-vinylpyrrolidone (G-AgPVPy) were prepared by chemical reduction and in-situ polymerization of vinylpyrrolidone (VPy). The prepared G-Ag and G-AgPVPy composites were characterized using various techniques. The size of the AgNPs on the graphene surface in the prepared G-Ag and G-AgPVPy composites was measured as ∼20 nm. The graphene sheets size in the G-Ag and G-AgPVPy composites were measured as 6.0-2.0 μm and 4.0-0.10 μm, respectively, which are much smaller than graphene sheets in graphite powder (GP) (10.0-3.0 μm). The physicochemical analysis confirmed the formation of G-Ag and G-AgPVPy composites and even the distribution of AgNPs and PVPy on the graphene sheets. The synthesized composites (G-AgPVPy, G-Ag) exhibited a broad-spectrum antibacterial potential against both Gram-negative and Gram-positive bacteria. The lowest minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) values were calculated as >40 μg/mL using G-Ag and GP, while G-AgPVPy showed as 10 μg/mL against Staphylococcus aureus. Among GP, G-Ag, and G-AgPVPy, G-AgPVPy disturbs the cell permeability, damages the cell walls, and causes cell death efficiently. Also, G-AgPVPy was delivered as a significant reusable antibacterial potential candidate. The MIC value (10 μg/mL) did not change up to six subsequent MIC analysis cycles.
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Affiliation(s)
- Suguna Perumal
- Department of Chemistry, Sejong University, Seoul, 143-747, Republic of Korea; School of Chemical Engineering, Yeungnam University, Gyeongsan, Gyeongsangbuk-do, 38541, Republic of Korea.
| | - Raji Atchudan
- School of Chemical Engineering, Yeungnam University, Gyeongsan, Gyeongsangbuk-do, 38541, Republic of Korea; Department of Chemistry, Saveetha School of Engineering, Saveetha Institute of Medical and Technical Sciences, Chennai, 602105, Tamil Nadu, India
| | - Srinivasan Ramalingam
- Department of Food Science and Technology, Yeungnam University, Gyeongsan, Gyeongsangbuk-do, 38541, Republic of Korea
| | - S Aldawood
- Department of Physics and Astronomy, College of Science, P.O. BOX 2455, King Saud University, Riyadh, 11451, Saudi Arabia
| | - Natarajan Devarajan
- Natural Drug Research Laboratory, Department of Biotechnology, School of Biosciences, Periyar University, Salem, 636011, Tamil Nadu, India
| | - Wonmok Lee
- Department of Chemistry, Sejong University, Seoul, 143-747, Republic of Korea
| | - Yong Rok Lee
- School of Chemical Engineering, Yeungnam University, Gyeongsan, Gyeongsangbuk-do, 38541, Republic of Korea.
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5
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Hu CX, Read O, Shin Y, Chen Y, Wang J, Boyes M, Zeng N, Panigrahi A, Kostarelos K, Larrosa I, Vranic S, Casiraghi C. Effects of Lateral Size, Thickness, and Stabilizer Concentration on the Cytotoxicity of Defect-Free Graphene Nanosheets: Implications for Biological Applications. ACS APPLIED NANO MATERIALS 2022; 5:12626-12636. [PMID: 36185165 PMCID: PMC9513747 DOI: 10.1021/acsanm.2c02403] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/01/2022] [Accepted: 08/25/2022] [Indexed: 06/16/2023]
Abstract
In this work, we apply liquid cascade centrifugation to highly concentrated graphene dispersions produced by liquid-phase exfoliation in water with an insoluble bis-pyrene stabilizer to obtain fractions containing nanosheets with different lateral size distributions. The concentration, stability, size, thickness, and the cytotoxicity profile are studied as a function of the initial stabilizer concentration for each fraction. Our results show that there is a critical initial amount of stabilizer (0.4 mg/mL) above which the dispersions show reduced concentration, stability, and biocompatibility, no matter the lateral size of the flakes.
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Affiliation(s)
- Chen-Xia Hu
- Department
of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, UK
| | - Oliver Read
- Department
of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, UK
| | - Yuyoung Shin
- Department
of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, UK
| | - Yingxian Chen
- Nanomedicine
Lab, Faculty of Biology, Medicine and Health, AV Hill Building, University of Manchester, Manchester M13 9PL, UK
- National
Graphene Institute, University of Manchester, Booth Street East, Manchester M13 9PL, UK
| | - Jingjing Wang
- Department
of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, UK
| | - Matthew Boyes
- Department
of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, UK
| | - Niting Zeng
- Department
of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, UK
| | - Adyasha Panigrahi
- Department
of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, UK
| | - Kostas Kostarelos
- Nanomedicine
Lab, Faculty of Biology, Medicine and Health, AV Hill Building, University of Manchester, Manchester M13 9PL, UK
- National
Graphene Institute, University of Manchester, Booth Street East, Manchester M13 9PL, UK
- Catalan
Institute of Nanoscience and Nanotechnology (ICN2), UAB Campus Bellaterra, Barcelona 08193, Spain
| | - Igor Larrosa
- Department
of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, UK
| | - Sandra Vranic
- Nanomedicine
Lab, Faculty of Biology, Medicine and Health, AV Hill Building, University of Manchester, Manchester M13 9PL, UK
- National
Graphene Institute, University of Manchester, Booth Street East, Manchester M13 9PL, UK
| | - Cinzia Casiraghi
- Department
of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, UK
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6
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Peng G, Keshavan S, Delogu L, Shin Y, Casiraghi C, Fadeel B. Two-Dimensional Transition Metal Dichalcogenides Trigger Trained Immunity in Human Macrophages through Epigenetic and Metabolic Pathways. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2107816. [PMID: 35434920 DOI: 10.1002/smll.202107816] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Revised: 03/31/2022] [Indexed: 06/14/2023]
Abstract
Trained immunity is a recently described phenomenon whereby cells of the innate immune system undergo long-term epigenetic and/or metabolic reprogramming following a short-term interaction with microbes or microbial products. Here, it is shown that 2D transition metal dichalcogenides (TMDs) trigger trained immunity in primary human monocyte-derived macrophages. First, aqueous dispersions of 2D crystal formulations of MoS2 and WS2 are tested, and no cytotoxicity is found despite avid uptake of these materials by macrophages. However, when macrophages are pre-exposed to TMDs, followed by a resting period, this causes a marked modulation of immune-specific gene expression upon subsequent challenge with a microbial agent (i.e., bacterial lipopolysaccharides). Specifically, MoS2 triggers trained immunity through an epigenetic pathway insofar as the histone methyltransferase inhibitor methylthioadenosine reverses these effects. Furthermore, MoS2 triggers an elevation of cyclic adenosine monophosphate (cAMP) levels in macrophages and increased glycolysis is also evidenced in cells subjected to MoS2 training, pointing toward a metabolic rewiring of the cells. Importantly, it is observed that MoS2 triggers the upregulation of Mo-dependent enzymes in macrophages, thus confirming that Mo is bioavailable in these cells. In conclusion, MoS2 is identified as a novel inducer of trained immunity. Thus, TMDs could potentially be harnessed as immunomodulatory agents.
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Affiliation(s)
- Guotao Peng
- Institute of Environmental Medicine, Karolinska Institutet, Stockholm, 171 77, Sweden
| | - Sandeep Keshavan
- Institute of Environmental Medicine, Karolinska Institutet, Stockholm, 171 77, Sweden
| | - Lucia Delogu
- Department of Biomedical Sciences, University of Padua, Padua, 35122, Italy
| | - Yuyoung Shin
- Department of Chemistry, University of Manchester, Manchester, M13 9PL, UK
| | - Cinzia Casiraghi
- Department of Chemistry, University of Manchester, Manchester, M13 9PL, UK
| | - Bengt Fadeel
- Institute of Environmental Medicine, Karolinska Institutet, Stockholm, 171 77, Sweden
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7
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Wang B, Guo H, Xu H, Chen Y, Zhao G, Yu H. The Role of Graphene Oxide Nanocarriers in Treating Gliomas. Front Oncol 2022; 12:736177. [PMID: 35155223 PMCID: PMC8831729 DOI: 10.3389/fonc.2022.736177] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2021] [Accepted: 01/12/2022] [Indexed: 12/11/2022] Open
Abstract
Gliomas are the most common primary malignant tumors of the central nervous system, and their conventional treatment involves maximal safe surgical resection combined with radiotherapy and temozolomide chemotherapy; however, this treatment does not meet the requirements of patients in terms of survival and quality of life. Graphene oxide (GO) has excellent physical and chemical properties and plays an important role in the treatment of gliomas mainly through four applications, viz. direct killing, drug delivery, immunotherapy, and phototherapy. This article reviews research on GO nanocarriers in the treatment of gliomas in recent years and also highlights new ideas for the treatment of these tumors.
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Affiliation(s)
- Bin Wang
- Department of Neurosurgery, The First Hospital of Jilin University, Changchun, China
| | - Hanfei Guo
- Cancer Center, The First Hospital of Jilin University, Changchun, China
| | - Haiyang Xu
- Department of Neurosurgery, The First Hospital of Jilin University, Changchun, China
| | - Yong Chen
- Department of Neurosurgery, The First Hospital of Jilin University, Changchun, China
| | - Gang Zhao
- Department of Neurosurgery, The First Hospital of Jilin University, Changchun, China
- *Correspondence: Gang Zhao, ; Hongquan Yu,
| | - Hongquan Yu
- Department of Neurosurgery, The First Hospital of Jilin University, Changchun, China
- *Correspondence: Gang Zhao, ; Hongquan Yu,
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8
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Jin R, Vuković F, Walsh TR. Peptide-Driven Exfoliation and Dispersion Mechanisms of Graphene in Aqueous Media. J Phys Chem Lett 2021; 12:11945-11950. [PMID: 34881890 DOI: 10.1021/acs.jpclett.1c03558] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Peptide-mediated exfoliation and suspension of graphene in aqueous media is a promising strategy for bioapplications such as drug delivery, tissue engineering, and biosensors. A few peptide sequences are known as graphene exfoliators/dispersants in water, but the mechanisms underpinning this process remain underexplored. Here, molecular simulations investigate two key steps: sheet exfoliation and subsequent sheet reunification, in aqueous media. Umbrella sampling simulations predict the energy required to separate a graphene sheet from a graphite stack in both the presence/absence of the graphene-exfoliant peptide, P1. The free-energy barrier for reunification of two P1-coated graphene sheets is similarly calculated. Under sonication, the benefit from the relatively lower free-energy barrier associated with exfoliation in the absence of the peptide is negated by its facile reunification postsonication. In contrast, although P1 slightly increases the energy barrier to exfoliation under sonication, the peptides confer high-energy barriers to sheet reunification, thus ensuring stable aqueous graphene dispersions.
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Affiliation(s)
- Ruitao Jin
- Institute for Frontier Materials, Deakin University, Geelong, Victoria 3216, Australia
| | - Filip Vuković
- Institute for Frontier Materials, Deakin University, Geelong, Victoria 3216, Australia
| | - Tiffany R Walsh
- Institute for Frontier Materials, Deakin University, Geelong, Victoria 3216, Australia
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9
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Perumal S, Atchudan R, Cheong IW. Recent Studies on Dispersion of Graphene-Polymer Composites. Polymers (Basel) 2021; 13:2375. [PMID: 34301133 PMCID: PMC8309616 DOI: 10.3390/polym13142375] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2021] [Revised: 07/16/2021] [Accepted: 07/17/2021] [Indexed: 12/23/2022] Open
Abstract
Graphene is an excellent 2D material that has extraordinary properties such as high surface area, electron mobility, conductivity, and high light transmission. Polymer composites are used in many applications in place of polymers. In recent years, the development of stable graphene dispersions with high graphene concentrations has attracted great attention due to their applications in energy, bio-fields, and so forth. Thus, this review essentially discusses the preparation of stable graphene-polymer composites/dispersions. Discussion on existing methods of preparing graphene is included with their merits and demerits. Among existing methods, mechanical exfoliation is widely used for the preparation of stable graphene dispersion, the theoretical background of this method is discussed briefly. Solvents, surfactants, and polymers that are used for dispersing graphene and the factors to be considered while preparing stable graphene dispersions are discussed in detail. Further, the direct applications of stable graphene dispersions are discussed briefly. Finally, a summary and prospects for the development of stable graphene dispersions are proposed.
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Affiliation(s)
- Suguna Perumal
- Department of Applied Chemistry, School of Engineering, Kyungpook National University, Daegu 41566, Korea
- School of Chemical Engineering, Yeungnam University, Gyeongsan 38541, Korea;
| | - Raji Atchudan
- School of Chemical Engineering, Yeungnam University, Gyeongsan 38541, Korea;
| | - In Woo Cheong
- Department of Applied Chemistry, School of Engineering, Kyungpook National University, Daegu 41566, Korea
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10
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Kim DS, Jeong JM, Park HJ, Kim YK, Lee KG, Choi BG. Highly Concentrated, Conductive, Defect-free Graphene Ink for Screen-Printed Sensor Application. NANO-MICRO LETTERS 2021; 13:87. [PMID: 34138339 PMCID: PMC8006523 DOI: 10.1007/s40820-021-00617-3] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Accepted: 01/29/2021] [Indexed: 05/20/2023]
Abstract
Ultrathin and defect-free graphene ink is prepared through a high-throughput fluid dynamics process, resulting in a high exfoliation yield (53.5%) and a high concentration (47.5 mg mL-1). A screen-printed graphene conductor exhibits a high electrical conductivity of 1.49 × 104 S m-1 and good mechanical flexibility. An electrochemical sodium ion sensor based on graphene ink exhibits an excellent potentiometric sensing performance in a mechanically bent state. Real-time monitoring of sodium ion concentration in sweat is demonstrated. Conductive inks based on graphene materials have received significant attention for the fabrication of a wide range of printed and flexible devices. However, the application of graphene fillers is limited by their restricted mass production and the low concentration of their suspensions. In this study, a highly concentrated and conductive ink based on defect-free graphene was developed by a scalable fluid dynamics process. A high shear exfoliation and mixing process enabled the production of graphene at a high concentration of 47.5 mg mL-1 for graphene ink. The screen-printed graphene conductor exhibits a high electrical conductivity of 1.49 × 104 S m-1 and maintains high conductivity under mechanical bending, compressing, and fatigue tests. Based on the as-prepared graphene ink, a printed electrochemical sodium ion (Na+) sensor that shows high potentiometric sensing performance was fabricated. Further, by integrating a wireless electronic module, a prototype Na+-sensing watch is demonstrated for the real-time monitoring of the sodium ion concentration in human sweat during the indoor exercise of a volunteer. The scalable and efficient procedure for the preparation of graphene ink presented in this work is very promising for the low-cost, reproducible, and large-scale printing of flexible and wearable electronic devices.
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Affiliation(s)
- Dong Seok Kim
- Department of Chemical Engineering, Kangwon National University, Samcheok, Gangwon-do, 25913, Republic of Korea
| | - Jae-Min Jeong
- Resources Utilization Research Center, Korea Institute of Geoscience and Mineral Resources, Daejeon, 34132, Republic of Korea
| | - Hong Jun Park
- Department of Chemical Engineering, Kangwon National University, Samcheok, Gangwon-do, 25913, Republic of Korea
| | - Yeong Kyun Kim
- Department of Chemical Engineering, Kangwon National University, Samcheok, Gangwon-do, 25913, Republic of Korea
| | - Kyoung G Lee
- Center for Nano Bio Development, National Nanofab Center, Daejeon, 34141, Republic of Korea.
| | - Bong Gill Choi
- Department of Chemical Engineering, Kangwon National University, Samcheok, Gangwon-do, 25913, Republic of Korea.
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11
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Hu CX, Shin Y, Read O, Casiraghi C. Dispersant-assisted liquid-phase exfoliation of 2D materials beyond graphene. NANOSCALE 2021; 13:460-484. [PMID: 33404043 DOI: 10.1039/d0nr05514j] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
The extensive research on liquid-phase exfoliation (LPE) performed in the last 10 years has enabled a low cost and mass scalable approach to the successful production of a range of solution-processed 2-dimensional (2D) materials suitable for many applications, from composites to energy storage and printed electronics. However, direct LPE requires the use of specific solvents, which are typically toxic and expensive. Dispersant-assisted LPE allows us to overcome this problem by enabling production of solution processed 2D materials in a wider range of solvents, including water. This approach is based on the inclusion of an additive, typically an amphiphilic molecule, designed to interact with both the nanosheet and the solvent, enabling exfoliation and stabilization at the same time. This method has been extensively used for the LPE of graphene and has been discussed in many reviews, whilst little attention has been given to dispersant-assisted LPE of 2D materials beyond graphene. Considering the increasing number of 2D materials and their potential in many applications, from nanomedicine to energy storage and catalysis, this review focuses on the dispersant-assisted LPE of transition metal dichalcogenides (TMDs), hexagonal boron nitride (h-BN) and less studied 2D materials. We first provide an introduction to the fundamentals of LPE and the type of dispersants that have been used for the production of graphene, we then discuss each class of 2D material, providing an overview on the concentration and properties of the nanosheets obtained. Finally, a perspective is given on some of the challenges that need to be addressed in this field of research.
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Affiliation(s)
- Chen-Xia Hu
- Department of Chemistry, University of Manchester, M139PL, Manchester, UK.
| | - Yuyoung Shin
- Department of Chemistry, University of Manchester, M139PL, Manchester, UK.
| | - Oliver Read
- Department of Chemistry, University of Manchester, M139PL, Manchester, UK.
| | - Cinzia Casiraghi
- Department of Chemistry, University of Manchester, M139PL, Manchester, UK.
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12
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Zhang J, Fu B, Song C, Shang W, Tao P, Deng T. Ethylene glycol nanofluids dispersed with monolayer graphene oxide nanosheet for high-performance subzero cold thermal energy storage. RSC Adv 2021; 11:30495-30502. [PMID: 35479859 PMCID: PMC9041135 DOI: 10.1039/d1ra04484b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2021] [Accepted: 08/31/2021] [Indexed: 11/21/2022] Open
Abstract
Ethylene glycol (EG) nanofluids have been intensively explored as one of the most promising solid–liquid phase change materials for subzero cold thermal energy storage (CTES). However, the prepared nanofluids usually suffer from a large supercooling degree, a long freezing period, reduced storage capacity and poor dispersion stability. Herein, we overcome these issues by developing stable EG nanofluids that are uniformly dispersed with low concentrations of monolayer ethanol-wetted graphene oxide nanosheets. The homogeneously dispersed monolayer sheet not only improves the thermal conductivity of the nanofluids (12.1%) but also provides the heterogeneous nucleation sites to trigger the crystal formation, thereby shortening the freezing time and reducing the supercooling degree. Compared with the base fluid, the nanofluids have reduced the supercooling degree by 87.2%, shortened the freezing time by 78.2% and maintained 98.5% of the latent heat. Moreover, the EG nanofluids have retained their initial stable homogeneous dispersion after repeated freezing/melting for 50 cycles, which ensures consistent CTES behavior during long-period operations. The facile preparation process, low loading requirement and consistent superior thermophysical properties would make the EG nanofluids loaded with monolayer graphene oxide sheets promising coolants for high-performance phase change-based CTES. Homogeneously dispersed monolayer graphene oxide sheet in ethylene glycol solution enable a high-performance cold thermal energy storage.![]()
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Affiliation(s)
- Jingyi Zhang
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Benwei Fu
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Chengyi Song
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Wen Shang
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Peng Tao
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Tao Deng
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
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