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Xiang J, Xu J, Li H, Chen L, Liu W. Distribution of oxygen-containing functional groups on defective graphene: properties engineering and Li adsorption. Phys Chem Chem Phys 2024; 26:12764-12777. [PMID: 38619495 DOI: 10.1039/d4cp00108g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/16/2024]
Abstract
In this study, the distribution of oxygen-containing functional groups on graphene with vacancies and topological defects was systematically investigated using advanced computational methods and the structure models for multi-defect graphene oxides (GOs) were proposed. All potential adsorption sites were considered through an automated structure generation program to identify energetically favorable structures. Unlike the pristine graphene surface where oxygen-containing functional groups always aggregate with each other, we observed a tendency for them to preferentially adsorb near defects. Furthermore, they may also be distributed on the same side or both sides of the defective graphene. These multi-defect GOs can exhibit either metallic or semiconducting properties. Notably, upon adsorbing the same oxygen-containing functional groups onto the surface of defective graphene, their electronic characteristics become homogeneous. The coexistence of vacancy/topological defects and oxygen-containing functional groups within the graphene lattice introduces intriguing mechanical anisotropic properties to graphene, including the uncommon negative Poisson's ratio. Additionally, these materials exhibit anisotropic optical behavior, displaying heightened absorption within the infrared and visible regions compared to pristine graphene. Finally, it is found that Li atoms are adsorbed stably on the surfaces of multi-defect GOs via the formation of LinO/LimOH clusters. The research findings presented in this paper, encompassing the development of structural models for multi-defect GOs, could provide crucial insights into the properties and potential applications of graphene oxides.
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Affiliation(s)
- Jiang Xiang
- Department of Optical Engineering, College of Optical, Mechanical and Electrical Engineering, Zhejiang A&F University, Hangzhou, Zhejiang, 311300, P. R. China.
| | - Jing Xu
- Department of Optical Engineering, College of Optical, Mechanical and Electrical Engineering, Zhejiang A&F University, Hangzhou, Zhejiang, 311300, P. R. China.
| | - Hongyan Li
- Department of Optical Engineering, College of Optical, Mechanical and Electrical Engineering, Zhejiang A&F University, Hangzhou, Zhejiang, 311300, P. R. China.
| | - Liang Chen
- Department of Optical Engineering, College of Optical, Mechanical and Electrical Engineering, Zhejiang A&F University, Hangzhou, Zhejiang, 311300, P. R. China.
- School of Physical Science and Technology, Ningbo University, Ningbo, Zhejiang, 315211, P. R. China
| | - Wei Liu
- Department of Optical Engineering, College of Optical, Mechanical and Electrical Engineering, Zhejiang A&F University, Hangzhou, Zhejiang, 311300, P. R. China.
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2
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Krasley A, Li E, Galeana JM, Bulumulla C, Beyene AG, Demirer GS. Carbon Nanomaterial Fluorescent Probes and Their Biological Applications. Chem Rev 2024; 124:3085-3185. [PMID: 38478064 PMCID: PMC10979413 DOI: 10.1021/acs.chemrev.3c00581] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2023] [Revised: 02/01/2024] [Accepted: 02/09/2024] [Indexed: 03/28/2024]
Abstract
Fluorescent carbon nanomaterials have broadly useful chemical and photophysical attributes that are conducive to applications in biology. In this review, we focus on materials whose photophysics allow for the use of these materials in biomedical and environmental applications, with emphasis on imaging, biosensing, and cargo delivery. The review focuses primarily on graphitic carbon nanomaterials including graphene and its derivatives, carbon nanotubes, as well as carbon dots and carbon nanohoops. Recent advances in and future prospects of these fields are discussed at depth, and where appropriate, references to reviews pertaining to older literature are provided.
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Affiliation(s)
- Andrew
T. Krasley
- Janelia
Research Campus, Howard Hughes Medical Institute, 19700 Helix Drive, Ashburn, Virginia 20147, United States
| | - Eugene Li
- Division
of Chemistry and Chemical Engineering, California
Institute of Technology, 1200 E. California Boulevard, Pasadena, California 91125, United States
| | - Jesus M. Galeana
- Division
of Chemistry and Chemical Engineering, California
Institute of Technology, 1200 E. California Boulevard, Pasadena, California 91125, United States
| | - Chandima Bulumulla
- Janelia
Research Campus, Howard Hughes Medical Institute, 19700 Helix Drive, Ashburn, Virginia 20147, United States
| | - Abraham G. Beyene
- Janelia
Research Campus, Howard Hughes Medical Institute, 19700 Helix Drive, Ashburn, Virginia 20147, United States
| | - Gozde S. Demirer
- Division
of Chemistry and Chemical Engineering, California
Institute of Technology, 1200 E. California Boulevard, Pasadena, California 91125, United States
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3
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Yang X, Dong S. Oxidation tuning of ferroic transitions in Gd2C monolayer. J Chem Phys 2024; 160:014705. [PMID: 38174798 DOI: 10.1063/5.0177722] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2023] [Accepted: 12/06/2023] [Indexed: 01/05/2024] Open
Abstract
Tuning of ferroic phases provides great opportunities for material functionalities, especially in two-dimensional materials. Here, a 4f rare-earth carbide Gd2C monolayer is predicted to be a ferromagnetic metal with large magnetization, inherited from its bulk property. Based on first-principles calculations, we propose a strategy that the surface passivation can effectively tune its ferroicity, namely, switching among ferromagnetic, antiferromagnetic, and ferroelectric phases. Metal-insulator transition also occurs accompanying these ferroic transitions. Our calculation also suggests that the magneto-optic Kerr effect and second harmonic generation are effective methods in monitoring these phase transitions.
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Affiliation(s)
- Xinyu Yang
- Key Laboratory of Quantum Materials and Devices of Ministry of Education, School of Physics, Southeast University, Nanjing 211189, China
| | - Shuai Dong
- Key Laboratory of Quantum Materials and Devices of Ministry of Education, School of Physics, Southeast University, Nanjing 211189, China
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4
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Li H, Xiang J, Chen L, Xu J, Liu W. Dense arrangement of crown ethers in graphene: novel graphitic carbon oxides with enhanced optoelectronic properties. Phys Chem Chem Phys 2024; 26:1428-1435. [PMID: 38112567 DOI: 10.1039/d3cp03902a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2023]
Abstract
Incorporating crown ethers into a graphene lattice presents an efficient means of tuning its properties and expanding its range of potential applications. This study employed density functional theory calculations to introduce a series of novel graphitic carbon oxides through the dense arrangement of crown ethers featuring varying cavity sizes within the graphene structure. These newly developed graphitic carbon oxides exhibit thermodynamic and dynamic stability. They also manifest improved stability relative to previously reported graphene oxides with similar oxygen content. Notably, a robust linear relationship is observed between the cohesive energies and the proportion of oxygen atoms. The electronic properties of these graphitic carbon oxides span a spectrum of characteristics, including semi-metallic, metallic, and semi-conducting behavior. Their calculated band gaps range from 0.11 eV to 4.38 eV. Specifically, our analysis reveals that C6G-1, characterized by its largest crown ether-like nanopore with six oxygen atoms, holds potential as a material for photocatalytic water splitting. Moreover, these materials exhibit anisotropic optical properties, showcasing a significant enhancement in absorption within the infrared and visible regions relative to pristine graphene. Given the successful experimental synthesis of crown ether in graphene, we anticipate that our findings will contribute to the widespread utilization of graphene derivatives in low-dimensional electronic, catalytic, and optical devices.
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Affiliation(s)
- Hongyan Li
- Department of Optical Engineering, College of Optical, Mechanical and Electrical Engineering, Zhejiang A&F University, Hangzhou, Zhejiang, 311300, P. R. China.
| | - Jiang Xiang
- Department of Optical Engineering, College of Optical, Mechanical and Electrical Engineering, Zhejiang A&F University, Hangzhou, Zhejiang, 311300, P. R. China.
| | - Liang Chen
- School of Physical Science and Technology, Ningbo University, Ningbo, Zhejiang, 315211, P. R. China
- Department of Optical Engineering, College of Optical, Mechanical and Electrical Engineering, Zhejiang A&F University, Hangzhou, Zhejiang, 311300, P. R. China.
| | - Jing Xu
- Department of Optical Engineering, College of Optical, Mechanical and Electrical Engineering, Zhejiang A&F University, Hangzhou, Zhejiang, 311300, P. R. China.
| | - Wei Liu
- Department of Optical Engineering, College of Optical, Mechanical and Electrical Engineering, Zhejiang A&F University, Hangzhou, Zhejiang, 311300, P. R. China.
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Das P, Ibrahim S, Chakraborty K, Ghosh S, Pal T. Stepwise reduction of graphene oxide and studies on defect-controlled physical properties. Sci Rep 2024; 14:294. [PMID: 38168613 PMCID: PMC10762075 DOI: 10.1038/s41598-023-51040-0] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2023] [Accepted: 12/29/2023] [Indexed: 01/05/2024] Open
Abstract
Graphene oxide (GO) is a monolayer of oxidized graphene which is a convenient and potential candidate in a wide range of fields of applications like electronics, photonics, optoelectronics, energy storage, catalysis, chemical sensors, and many others. GO is often composed of various oxygen-containing groups such as hydroxyl, carboxyl, and epoxy. One appealing method for achieving graphene-like behavior with sp2 hybridized carbon is the reduction of GO i.e. formation of reduced graphene oxide (RGO). A stepwise reduction GO to form a family of RGO, containing various quantities of oxygen-related defects was carried out. Herein, the defects related chemical and physical properties of GO and the RGO family were studied and reported in an effort to understand how the properties of RGO vary with the reduction rate. Although there are several reports on various features and applications of GO and RGO but a systematic investigation of the variation of the physical and chemical properties in RGO with the varying quantities of oxygeneous defects is imperative for the engineered physical properties in achieving the desired field of applications. We have attempted to look at the role of sp2 and sp3 carbon fractions, which are present in RGO-based systems, and how they affect the electrical, optoelectronic, and adsorption characteristics.
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Affiliation(s)
- Poulomi Das
- Department of Physics, Midnapore College, Midnapore, WB, 721101, India
| | - Sk Ibrahim
- Department of Physics, Vidyasagar University, Midnapore, WB, 721102, India
| | | | - Surajit Ghosh
- Department of Physics, Vidyasagar University, Midnapore, WB, 721102, India.
| | - Tanusri Pal
- Department of Physics, Midnapore College, Midnapore, WB, 721101, India.
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6
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Sadek MS, Khedr GE, Messih MFA, Ismail MAH. Experimental and DFT study of photocatalytic activity of reduced graphene oxide/copper sulfide composite for removal of organic dyes from water. Sci Rep 2023; 13:15636. [PMID: 37731017 PMCID: PMC10511407 DOI: 10.1038/s41598-023-42680-3] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Accepted: 09/13/2023] [Indexed: 09/22/2023] Open
Abstract
In this work, successful nanocomposites composed of different ratios of reduced graphene oxide and copper sulphide (xCuS-rGO) were fabricated to aid in treating water contaminated with organic dyes. XRD, TEM, SEM, XPS, IR, EDX and BET were applied for the characterization of (CuS-rGO). The photocatalytic strength of the prepared nanocomposites was evaluated using artificial sunlight irradiation. The nanocomposites were tested for their ability to degrade both anionic and cationic organic dyes, including amaranth and rhodamine B (RhB). The excellent photocatalytic strength of our composites, relative to pristine CuS and rGO, was interpreted as rGO sheets being very porous. In addition, the charge moved efficiently from rGO to CuS. The combined properties enhanced the efficiency of photodegradation of CuS-rGO composite across the dyes under the illumination of simulated sunlight. The electron transportation from rGO sheets to the CuS conduction band enhances the charge separation and transportation. The role of superoxide radicals in photocatalytic degradation was unveiled and the interactions between the studied dyes and our catalysts were investigated by density functional theory study and scavenging investigation. This work gives new ideas about the preparation and properties of (CuS-rGO) composites and their broad application in solving environmental problems.
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Affiliation(s)
- Mohamed S Sadek
- Chemistry Department, Faculty of Science, Ain-Shams University, Cairo, Egypt.
| | - Ghada E Khedr
- Department of Analysis and Evaluation, Egyptian Petroleum Research Institute (EPRI), Cairo, 11727, Egypt
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7
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Yu T, Fang Y, Chen X, Liu M, Wang D, Liu S, Lei W, Jiang H, Shafie S, Mohtar MN, Pan L, Zhao Z. Hybridization state transition-driven carbon quantum dot (CQD)-based resistive switches for bionic synapses. Mater Horiz 2023; 10:2181-2190. [PMID: 36994553 DOI: 10.1039/d3mh00117b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
As an emerging carbon-based material, carbon quantum dots (CQDs) have shown unstoppable prospects in the field of bionic electronics with their outstanding optoelectronic properties and unique biocompatible characteristics. In this study, a novel CQD-based memristor is proposed for neuromorphic computing. Unlike the models that rely on the formation and rupturing of conductive filaments, it is speculated that the resistance switching mechanism of CQD-based memristors is due to the conductive path caused by the hybridization state transition of the sp2 carbon domain and sp3 carbon domain induced by the reversible electric field. This avoids the drawback of uncontrollable nucleation sites leading to the random formation of conductive filaments in resistive switching. Importantly, it illustrates that the coefficient of variation (CV) of the threshold voltage can be as low as -1.551% and 0.083%, which confirms the remarkable uniform switching characteristics. Interestingly, the Pavlov's dog reflection as an important biological behavior can be demonstrated by the samples. Finally, the accuracy recognition rate of MNIST handwriting can reach up to 96.7%, which is very close to the ideal number (97.8%). A carbon-based memristor based on a new mechanism presented provides new possibilities for the improvement of brain-like computing.
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Affiliation(s)
- Tianqi Yu
- Joint International Research Laboratory of Information Display and Visualization, School of Electronic Science and Engineering, Southeast University, Nanjing 210096, People's Republic of China.
| | - Yong Fang
- Joint International Research Laboratory of Information Display and Visualization, School of Electronic Science and Engineering, Southeast University, Nanjing 210096, People's Republic of China.
| | - Xinyue Chen
- Joint International Research Laboratory of Information Display and Visualization, School of Electronic Science and Engineering, Southeast University, Nanjing 210096, People's Republic of China.
| | - Min Liu
- Joint International Research Laboratory of Information Display and Visualization, School of Electronic Science and Engineering, Southeast University, Nanjing 210096, People's Republic of China.
| | - Dong Wang
- Joint International Research Laboratory of Information Display and Visualization, School of Electronic Science and Engineering, Southeast University, Nanjing 210096, People's Republic of China.
| | - Shilin Liu
- Joint International Research Laboratory of Information Display and Visualization, School of Electronic Science and Engineering, Southeast University, Nanjing 210096, People's Republic of China.
| | - Wei Lei
- Joint International Research Laboratory of Information Display and Visualization, School of Electronic Science and Engineering, Southeast University, Nanjing 210096, People's Republic of China.
| | - Helong Jiang
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology Chinese Academy of Sciences, Nanjing 210008, People's Republic of China
| | - Suhaidi Shafie
- Institute of Nanoscience and Nanotechnology, University Putra Malaysia, Serdang, Selangor, Malaysia
| | - Mohd Nazim Mohtar
- Institute of Nanoscience and Nanotechnology, University Putra Malaysia, Serdang, Selangor, Malaysia
| | - Likun Pan
- Shanghai Key Laboratory of Magnetic Resonance, School of Physics and Electronic Science, East China Normal University, Shanghai 200241, People's Republic of China
| | - Zhiwei Zhao
- Joint International Research Laboratory of Information Display and Visualization, School of Electronic Science and Engineering, Southeast University, Nanjing 210096, People's Republic of China.
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8
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Zhang Y, Wang L, Hu Y, Sui L, Cheng L, Lu S. Centralized Excited States and Fast Radiation Transitions Reduce Laser Threshold in Carbon Dots. Small 2023; 19:e2207983. [PMID: 36843250 DOI: 10.1002/smll.202207983] [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: 12/20/2022] [Revised: 02/05/2023] [Indexed: 06/15/2023]
Abstract
As a new type of solution-processed nano-laser material, carbon dots (CDs) have shown considerable potential in optical communication, laser displays, micro/nano processing, and biomedicine. Reducing the laser threshold of the gain material is of considerable significance for further development of CDs' applications in the field of micro/nano lasers. A series of blue-emissive CDs (B-CDs) are synthesized by changing the molar ratios of the precursors (citric acid (CA): L-Cysteine (L-Cys)). B-CDs have a structure of carbon nanoparticles with their surface being modified with 5-oxo-3,5-dihydro-2Hthiazolo [3,2-a]pyridine-7-carboxylic acid (TPCA). The laser can only be generated when the molar ratio of the precursors is between 1:1 and 2:1. With an increase in this ratio, the laser threshold decreases from 341.6 to 165.5 mJ cm-2 . The decrease in the laser threshold is attributed to the increase in the radiation transition rate and centralized sp3 -related excited state levels, which are favorable for light amplification and population inversion. These results will be instructional for the reasonably design of CDs-based laser materials and prompt their potential use in practical photonics.
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Affiliation(s)
- Yongqiang Zhang
- Green Catalysis Center, and College of Chemistry, Zhengzhou University, No. 100 Kexue Road, Zhengzhou, 450001, P. R. China
| | - Lu Wang
- Green Catalysis Center, and College of Chemistry, Zhengzhou University, No. 100 Kexue Road, Zhengzhou, 450001, P. R. China
| | - Yongsheng Hu
- School of Physics and Microelectronics, Zhengzhou University, No. 100 Kexue Road, Zhengzhou, 450001, P. R. China
| | - Laizhi Sui
- State Key Laboratory of Molecular Reaction Dynamics and Dalian Coherent Light Source, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, No. 457 zhongshan road, Dalian, 116023, P. R. China
| | - Liwen Cheng
- College of Physical Science and Technology, Yangzhou University, No. 88 South Daxue Road, Yangzhou, 225002, P. R. China
| | - Siyu Lu
- Green Catalysis Center, and College of Chemistry, Zhengzhou University, No. 100 Kexue Road, Zhengzhou, 450001, P. R. China
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9
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Shih CY, Wang PT, Chung WP, Wang WH, Chiang IT, Su WC, Huang WL, Teng H. Concise nanotherapeutic modality for cancer involving graphene oxide dots in conjunction with ascorbic acid. Nanoscale 2023. [PMID: 37183719 DOI: 10.1039/d3nr00431g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Cancer cells tend to have higher intracellular reactive oxygen species (ROS) levels and are more vulnerable to ROS-generating therapies such as ascorbic acid (H2Asc) therapy, whose potency has been explored by several clinical trials. However, its efficiency is restricted by the requirement of pharmacologically high local H2Asc concentrations. Here, we show that nitrogen-doped graphene oxide dots (NGODs), which are highly crystalline and biocompatible, can serve as a catalytic medium for improving H2Asc cancer therapy at orally achievable physiological H2Asc concentrations. NGODs catalyze H2Asc oxidation for H2O2 and dehydroascorbic acid generation to disrupt cancer cells by consuming intracellular glutathione (GSH) and inducing ROS damage. This is the first study to demonstrate the direct consumption of GSH using a carbon-based nano-catalyst (NGODs), which further expedites tumor killing. In addition, as in our previous study, NGODs can also serve as a highly efficient photosensitizer for photodynamic therapy. Under illumination, NGODs produce a considerable amount of H2O2 in the presence of physiological levels of H2Asc as a hole scavenger and further enhance the therapeutic efficiency. Thus, a concise nanotherapeutic modality could be achieved through the conjunction of multifunctional NGODs and H2Asc to selectively eliminate deep-seated and superficial tumors simultaneously (under 65% of normal cell viability, it kills almost all cancer cells). Note that this level of therapeutic versatility generally requires multiple components and complex manufacturing processes that run into difficulties with FDA regulations and clinical applications. In this study, the concise NGOD-H2Asc nanotherapeutic modality has demonstrated its great potential in cancer therapy.
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Affiliation(s)
- Chun-Yan Shih
- Department of Chemical Engineering, National Cheng Kung University, Tainan 70101, Taiwan.
- Center of Applied Nanomedicine, National Cheng Kung University, Tainan 70101, Taiwan.
- Hierarchical Green-Energy Materials (Hi-GEM) Research Center, National Cheng Kung University, Tainan 70101, Taiwan
| | - Pei-Ting Wang
- Department of Chemical Engineering, National Cheng Kung University, Tainan 70101, Taiwan.
- Center of Applied Nanomedicine, National Cheng Kung University, Tainan 70101, Taiwan.
- Hierarchical Green-Energy Materials (Hi-GEM) Research Center, National Cheng Kung University, Tainan 70101, Taiwan
| | - Wei-Pang Chung
- Center of Applied Nanomedicine, National Cheng Kung University, Tainan 70101, Taiwan.
- Department of Oncology, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan 70101, Taiwan
| | - Wen-Hsiu Wang
- Department of Medical Laboratory Science and Biotechnology, College of Medicine, National Cheng Kung University, Tainan 70101, Taiwan
| | - I-Ting Chiang
- Center of Applied Nanomedicine, National Cheng Kung University, Tainan 70101, Taiwan.
| | - Wu-Chou Su
- Center of Applied Nanomedicine, National Cheng Kung University, Tainan 70101, Taiwan.
- Department of Oncology, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan 70101, Taiwan
| | - Wei-Lun Huang
- Center of Applied Nanomedicine, National Cheng Kung University, Tainan 70101, Taiwan.
- Department of Medical Laboratory Science and Biotechnology, College of Medicine, National Cheng Kung University, Tainan 70101, Taiwan
| | - Hsisheng Teng
- Department of Chemical Engineering, National Cheng Kung University, Tainan 70101, Taiwan.
- Center of Applied Nanomedicine, National Cheng Kung University, Tainan 70101, Taiwan.
- Hierarchical Green-Energy Materials (Hi-GEM) Research Center, National Cheng Kung University, Tainan 70101, Taiwan
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10
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Abbaspour M. Polyoxometalate ionic liquid between graphene oxide surfaces as a new membrane in the desalination process: a molecular dynamics study. Phys Chem Chem Phys 2023; 25:13654-13664. [PMID: 37145119 DOI: 10.1039/d2cp05486h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
In this study, the performance of the positioning of polyoxometalate ionic liquid ([Keggin][emim]3 IL) between graphene oxide (GO) plates with different concentrations (nIL-GO (n = 1-4)) were examined in the desalination process at different external pressures using molecular dynamics (MD) simulations. The use of Keggin anions with charged GO layers was also investigated in the desalination process. The potential of the mean force, average number of hydrogen bonds, self-diffusion coefficient, and angle distribution function were calculated and discussed. The results showed that although the presence of polyoxometalate ILs between the GO plates decreases water flux, they efficiently increase salt rejection. The positioning of one IL increases salt rejection to two times at lower pressure and increases it up to four times at higher pressure. Moreover, the positioning of four ILs results in almost complete salt rejection at all pressures. The use of only Keggin anions between the charged GO plates (n[Keggin]-GO+3n) presents more water flux and a smaller salt rejection rate than the nIL-GO systems. However, the n[Keggin]-GO+3n systems show a nearly complete salt rejection at high concentrations of Keggin anions. These systems also have a smaller risk of the contamination of the desalinated water by the probable escape of cations from the nanostructure to the desalinated water at very high pressures.
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Affiliation(s)
- Mohsen Abbaspour
- Department of Chemistry, Hakim Sabzevari University, Sabzevar, Iran.
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11
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Sánchez-Trujillo DJ, Osorio-Maldonado LV, Prías-Barragán JJ. Temperature dependence of electrical conductivity and variable hopping range mechanism on graphene oxide films. Sci Rep 2023; 13:4810. [PMID: 36959218 PMCID: PMC10036326 DOI: 10.1038/s41598-023-31778-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Accepted: 03/17/2023] [Indexed: 03/25/2023] Open
Abstract
The rapid development of optoelectronic applications for optical-to-electrical conversion has increased the interest in graphene oxide material. Here, graphene oxide films (GOF) were used as source material in an infrared photodetector configuration and the temperature dependence of the electrical conductivity was studied. GOF were prepared by the double-thermal decomposition (DTD) method at 973 K, with a fixed carbonization temperature, in a pyrolysis system, under a controlled nitrogen atmosphere, over quartz substrates. Graphene oxide films were mechanically supported in a photodetector configuration on Bakelite substrates and electrically contacted with copper wires and high-purity silver paint. Morphological images from the GOF's surface were taken employing a scanning electron microscope and observed a homogeneous surface which favored the electrical contacts deposition. Vibrational characteristics were studied employing Raman spectroscopy and determined the typical graphene oxide bands. GOF were used to discuss the effect of temperature on the film's electrical conductivity. Current-voltage (I-V) curves were taken for several temperatures varying from 20 to 300 K and the electrical resistance values were obtained from 142.86 to 2.14 kΩ. The GOF electrical conductivity and bandgap energy (Eg) were calculated, and it was found that when increasing temperature, the electrical conductivity increased from 30.33 to 2023.97 S/m, similar to a semiconductor material, and Eg shows a nonlinear change from 0.33 to 0.12 eV, with the increasing temperature. Conduction mechanism was described mainly by three-dimensional variable range hopping (3D VRH). Additionally, measurements of voltage and electrical resistance, as a function of wavelength were considered, for a spectral range between 1300 and 3000 nm. It was evidenced that as the wavelength becomes longer, a greater number of free electrons are generated, which contributes to the electrical current. The external quantum efficiency (EQE) was determined for this proposed photodetector prototype, obtaining a value of 40%, similar to those reported for commercial semiconductor photodetectors. This study provides a groundwork for further development of graphene oxide films with high conductivity in large-scale preparation.
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Affiliation(s)
- D J Sánchez-Trujillo
- Electronic Engineering Program, Faculty of Engineering at Universidad del Quindío, 630004, Armenia, Colombia
- Doctoral Program in Physical Sciences, Interdisciplinary Institute of Sciences, Electronic Instrumentation Technology Program, Faculty of Basic Sciences and Technology at Universidad del Quindío, 630004, Armenia, Colombia
| | - L V Osorio-Maldonado
- Electronic Engineering Program, Faculty of Engineering at Universidad del Quindío, 630004, Armenia, Colombia
| | - J J Prías-Barragán
- Doctoral Program in Physical Sciences, Interdisciplinary Institute of Sciences, Electronic Instrumentation Technology Program, Faculty of Basic Sciences and Technology at Universidad del Quindío, 630004, Armenia, Colombia.
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12
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Wang C, He Y, Huang J, Sui L, Ran G, Zhu H, Song Q. Intramolecular hydrogen bond-tuned thermal-responsive carbon dots and their application to abnormal body temperature imaging. J Colloid Interface Sci 2023; 634:221-30. [PMID: 36535160 DOI: 10.1016/j.jcis.2022.12.046] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2022] [Revised: 11/27/2022] [Accepted: 12/10/2022] [Indexed: 12/14/2022]
Abstract
A steric hindrance strategy was used to prepare intramolecular hydrogen bond-controlled thermosensitive fluorescent carbon dots (CDs) via the solvothermal treatment of o-phenylenediamine respectively with three dihydroxybenzene isomers. The CDs obtained from different isomers have very similar morphology, surfaces, and photophysical properties but exhibited different thermal sensitivities. Meanwhile, the orange-emitting CDs (p-CDs) obtained from o-phenylenediamine and p-hydroquinone exhibited an optimal thermal sensitivity of 1.1%/°C. Comprehensive experimental characterizations and theoretical calculations revealed that even a small difference in substituent locations in the phenyl ring of the precursors can considerably affect the formation of intramolecular hydrogen bonds and that the CDs with strong intramolecular hydrogen bonds exhibited poor thermosensitivity. The p-CDs were incorporated with reference CDs (B-CDs) that exhibited heating-quenching blue emission through electrostatic self-assembly to construct a dual-emission probe (p-CDs/B-CDs), which exhibited a thermal sensitivity of 2.0%/°C. Test strips based on the p-CDs/B-CDs were prepared to measure temperature fluctuations based on sensitive and instant fluorescence color evolution. Further, this fluorescent colorimetry was successfully applied to a test strip-integrated wearable wristband to measure the body temperature. This study establishes an inherent relationship between precursors and the resulting intramolecular hydrogen bonds for precisely tuning the thermal sensitivity of CDs. It also offers a visual quantitative strategy for the early warning of abnormal body temperatures.
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Abstract
Graphene oxide (GO) was initially developed to emulate graphene, but it was soon recognized as a functional material in its own right, addressing an application space that is not accessible to graphene and other carbon materials. Over the past decade, research on GO has made tremendous advances in material synthesis and property tailoring. These, in turn, have led to rapid progress in GO-based photonics, electronics and optoelectronics, paving the way for technological breakthroughs with exceptional performance. In this Review, we provide an overview of the optical, electrical and optoelectronic properties of GO and reduced GO on the basis of their chemical structures and fabrication approaches, together with their applications in key technologies such as solar energy harvesting, energy storage, medical diagnosis, image display and optical communications. We also discuss the challenges of this field, together with exciting opportunities for future technological advances.
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14
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Ashry NM, El Bahgy HEK, Mohamed A, Alsubhi NH, Alrefaei GI, Binothman N, Alharbi M, Selim S, Almuhayawi MS, Alharbi MT, Nagshabandi MK, Saad AM, El-Saadony MT, Sitohy B. Evaluation of graphene oxide, chitosan and their complex as antibacterial agents and anticancer apoptotic effect on HeLa cell line. Front Microbiol 2022; 13:922324. [PMID: 36267179 PMCID: PMC9577200 DOI: 10.3389/fmicb.2022.922324] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2022] [Accepted: 08/08/2022] [Indexed: 11/13/2022] Open
Abstract
Cancer and bacterial infection are the most serious problems threatening people's lives worldwide. However, the overuse of antibiotics as antibacterial and anticancer treatments can cause side effects and lead to drug-resistant bacteria. Therefore, developing natural materials with excellent antibacterial and anticancer activity is of great importance. In this study, different concentrations of chitosan (CS), graphene oxide (GO), and graphene oxide-chitosan composite (GO-CS) were tested to inhibit the bacterial growth of gram-positive (Bacillus cereus MG257494.1) and gram-negative (Pseudomonas aeruginosa PAO1). Moreover, we used the most efficient natural antibacterial material as an anticancer treatment. The zeta potential is a vital factor for antibacterial and anticancer mechanism, at pH 3–7, the zeta potential of chitosan was positive while at pH 7–12 were negative, however, the zeta potential for GO was negative at all pH values, which (p < 0.05) increased in the GO-CS composite. Chitosan concentrations (0.2 and 1.5%) exhibited antibacterial activity against BC with inhibition zone diameters of 4 and 12 mm, respectively, and against PAO1 with 2 and 10 mm, respectively. Treating BC and PAO1 with GO:CS (1:2) and GO:CS (1:1) gave a larger (p < 0.05) inhibition zone diameter. The viability and proliferation of HeLa cells treated with chitosan were significantly decreased (p < 0.05) from 95.3% at 0% to 12.93%, 10.33%, and 5.93% at 0.2%, 0.4%, and 0.60% concentrations of chitosan, respectively. Furthermore, CS treatment increased the activity of the P53 protein, which serves as a tumor suppressor. This study suggests that chitosan is effective as an antibacterial and may be useful for cancer treatment.
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Affiliation(s)
- Noha M. Ashry
- Department of Agriculture Microbiology, Faculty of Agriculture, Benha University, Qalubia, Egypt
| | - Halla E. K. El Bahgy
- Department of Veterinary Hygiene and Management, Faculty of Veterinary Medicine, Benha University, Banha, Egypt
| | - Abdelkader Mohamed
- Department of Soil and Water Research, Nuclear Research Center, Egyptian Atomic Energy Authority, Abou Zaabl, Egypt
| | - Nouf H. Alsubhi
- Department of Biological Sciences, College of Science and Arts, King Abdulaziz University, Rabigh, Saudi Arabia
| | - Ghadeer I. Alrefaei
- Department of Biology, College of Science, University of Jeddah, Jeddah, Saudi Arabia
| | - Najat Binothman
- Department of Chemistry, College of Sciences and Arts, King Abdulaziz University, Rabigh, Saudi Arabia
| | - Mona Alharbi
- Department of Biochemistry, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - Samy Selim
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, Jouf University, Sakaka, Saudi Arabia
- Samy Selim
| | - Mohammed S. Almuhayawi
- Department of Medical Microbiology and Parasitology, Faculty of Medicine, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Mohanned T. Alharbi
- Department of Medical Microbiology and Parasitology, Faculty of Medicine, University of Jeddah, Jeddah, Saudi Arabia
| | - Mohammed K. Nagshabandi
- Department of Medical Microbiology and Parasitology, Faculty of Medicine, University of Jeddah, Jeddah, Saudi Arabia
| | - Ahmed M. Saad
- Department of Biochemistry, Faculty of Agriculture Zagazig University, Zagazig, Egypt
| | - Mohamed T. El-Saadony
- Department of Agricultural Microbiology, Faculty of Agriculture, Zagazig University, Zagazig, Egypt
- *Correspondence: Mohamed T. El-Saadony
| | - Basel Sitohy
- Department of Radiation Sciences, Oncology, Umeå University, Umeå, Sweden
- Department of Clinical Microbiology, Infection and Immunology, Umeå University, Umeå, Sweden
- Basel Sitohy
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15
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Kanwal S, Mansoor F, Tu D, Li R, Zheng W, Lu S, Chen X. Polarity-dependent emission from hydroxyl-free carbon nanodots. Nanoscale 2022; 14:13059-13065. [PMID: 36053169 DOI: 10.1039/d2nr03168j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Surface groups of carbon nanodots (CNDs) play a key role in modulating their photoluminescence (PL) properties. However, most of the as-prepared CNDs are complex mixtures of CNDs bearing different surface groups. Thus, the purification of CNDs is essential to reveal the PL mechanism of CNDs. Herein, we present a facile method to synthesize hydroxyl (-OH) free CNDs, followed by intelligently guided column chromatographic separation of CNDs with specific functional groups according to their degree of polarity. After systematic investigation of the separated non-polar CNDs (NP-CNDs) and polar CNDs (P-CNDs), it is revealed that radiative photon emission dominates in the NP-CNDs, which exhibits excitation wavelength-independent emissions. In contrast, an increase in the solvent polarity of P-CNDs improves Frank-Condon excited state stabilization to achieve excitation wavelength-dependent emissions. In particular, white-light emitting P-CNDs with CIE coordinates of (0.332, 0.336) are produced. These findings provide new insights into the nature of the PL mechanism for CNDs, which may pave the way towards the rational design of highly efficient and emission tunable CNDs for various applications.
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Affiliation(s)
- Shamsa Kanwal
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Key Laboratory of Nanomaterials, and State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China.
- Department of Chemistry, Khwaja Fareed University of Engineering and Information Technology, Abu Dhabi Road, Rahim Yar Khan, Pakistan
- Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fuzhou, Fujian 350108, China
| | - Farukh Mansoor
- Department of Chemistry, Khwaja Fareed University of Engineering and Information Technology, Abu Dhabi Road, Rahim Yar Khan, Pakistan
| | - Datao Tu
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Key Laboratory of Nanomaterials, and State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China.
- Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fuzhou, Fujian 350108, China
| | - Renfu Li
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Key Laboratory of Nanomaterials, and State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China.
- Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fuzhou, Fujian 350108, China
| | - Wei Zheng
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Key Laboratory of Nanomaterials, and State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China.
- Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fuzhou, Fujian 350108, China
| | - Shan Lu
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Key Laboratory of Nanomaterials, and State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China.
- Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fuzhou, Fujian 350108, China
| | - Xueyuan Chen
- CAS Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Key Laboratory of Nanomaterials, and State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China.
- Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fuzhou, Fujian 350108, China
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16
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Lee HY, Haidari MM, Kee EH, Choi JS, Park BH, Campbell EEB, Jhang SH. Charge Transport in UV-Oxidized Graphene and Its Dependence on the Extent of Oxidation. Nanomaterials (Basel) 2022; 12:2845. [PMID: 36014709 PMCID: PMC9415921 DOI: 10.3390/nano12162845] [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: 07/27/2022] [Revised: 08/15/2022] [Accepted: 08/15/2022] [Indexed: 06/15/2023]
Abstract
Graphene oxides with different degrees of oxidation are prepared by controlling UV irradiation on graphene, and the charge transport and the evolution of the transport gap are investigated according to the extent of oxidation. With increasing oxygenous defect density nD, a transition from ballistic to diffusive conduction occurs at nD≃1012 cm-2 and the transport gap grows in proportion to nD. Considering the potential fluctuation related to the e-h puddle, the bandgap of graphene oxide is deduced to be Eg≃30nD(1012cm-2) meV. The temperature dependence of conductivity showed metal-insulator transitions at nD≃0.3×1012 cm-2, consistent with Ioffe-Regel criterion. For graphene oxides at nD≥4.9×1012 cm-2, analysis indicated charge transport occurred via 2D variable range hopping conduction between localized sp2 domain. Our work elucidates the transport mechanism at different extents of oxidation and supports the possibility of adjusting the bandgap with oxygen content.
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Affiliation(s)
- Hwa Yong Lee
- School of Physics, Konkuk University, Seoul 05029, Korea
| | | | - Eun Hee Kee
- School of Physics, Konkuk University, Seoul 05029, Korea
| | - Jin Sik Choi
- School of Physics, Konkuk University, Seoul 05029, Korea
| | - Bae Ho Park
- School of Physics, Konkuk University, Seoul 05029, Korea
| | - Eleanor E. B. Campbell
- EaStCHEM, School of Chemistry, Edinburgh University, David Brewster Road, Edinburgh EH9 3FJ, UK
| | - Sung Ho Jhang
- School of Physics, Konkuk University, Seoul 05029, Korea
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17
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Lin H, Zhang Z, Zhang H, Lin KT, Wen X, Liang Y, Fu Y, Lau AKT, Ma T, Qiu CW, Jia B. Engineering van der Waals Materials for Advanced Metaphotonics. Chem Rev 2022; 122:15204-15355. [PMID: 35749269 DOI: 10.1021/acs.chemrev.2c00048] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The outstanding chemical and physical properties of 2D materials, together with their atomically thin nature, make them ideal candidates for metaphotonic device integration and construction, which requires deep subwavelength light-matter interaction to achieve optical functionalities beyond conventional optical phenomena observed in naturally available materials. In addition to their intrinsic properties, the possibility to further manipulate the properties of 2D materials via chemical or physical engineering dramatically enhances their capability, evoking new science on light-matter interaction, leading to leaped performance of existing functional devices and giving birth to new metaphotonic devices that were unattainable previously. Comprehensive understanding of the intrinsic properties of 2D materials, approaches and capabilities for chemical and physical engineering methods, the resulting property modifications and novel functionalities, and applications of metaphotonic devices are provided in this review. Through reviewing the detailed progress in each aspect and the state-of-the-art achievement, insightful analyses of the outstanding challenges and future directions are elucidated in this cross-disciplinary comprehensive review with the aim to provide an overall development picture in the field of 2D material metaphotonics and promote rapid progress in this fast emerging and prosperous field.
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Affiliation(s)
- Han Lin
- School of Science, RMIT University, Melbourne, Victoria 3000, Australia.,The Australian Research Council (ARC) Industrial Transformation Training, Centre in Surface Engineering for Advanced Materials (SEAM), Swinburne University of Technology, Hawthorn, Victoria 3122, Australia
| | - Zhenfang Zhang
- School of Textile Science and Engineering, Xi'an Polytechnic University, Xi'an 710048, China
| | - Huihui Zhang
- Centre for Translational Atomaterials, School of Science, Computing and Engineering Technologies, Swinburne University of Technology, P.O. Box 218, Hawthorn, Victoria 3122, Australia
| | - Keng-Te Lin
- School of Science, RMIT University, Melbourne, Victoria 3000, Australia
| | - Xiaoming Wen
- Centre for Translational Atomaterials, School of Science, Computing and Engineering Technologies, Swinburne University of Technology, P.O. Box 218, Hawthorn, Victoria 3122, Australia
| | - Yao Liang
- Centre for Translational Atomaterials, School of Science, Computing and Engineering Technologies, Swinburne University of Technology, P.O. Box 218, Hawthorn, Victoria 3122, Australia
| | - Yang Fu
- Centre for Translational Atomaterials, School of Science, Computing and Engineering Technologies, Swinburne University of Technology, P.O. Box 218, Hawthorn, Victoria 3122, Australia
| | - Alan Kin Tak Lau
- Centre for Translational Atomaterials, School of Science, Computing and Engineering Technologies, Swinburne University of Technology, P.O. Box 218, Hawthorn, Victoria 3122, Australia
| | - Tianyi Ma
- School of Science, RMIT University, Melbourne, Victoria 3000, Australia.,Centre for Translational Atomaterials, School of Science, Computing and Engineering Technologies, Swinburne University of Technology, P.O. Box 218, Hawthorn, Victoria 3122, Australia
| | - Cheng-Wei Qiu
- Department of Electrical and Computer Engineering, National University of Singapore, Singapore 117583, Singapore
| | - Baohua Jia
- School of Science, RMIT University, Melbourne, Victoria 3000, Australia.,The Australian Research Council (ARC) Industrial Transformation Training, Centre in Surface Engineering for Advanced Materials (SEAM), Swinburne University of Technology, Hawthorn, Victoria 3122, Australia.,Centre for Translational Atomaterials, School of Science, Computing and Engineering Technologies, Swinburne University of Technology, P.O. Box 218, Hawthorn, Victoria 3122, Australia
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18
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Nakaharai S, Iwasaki T, Morita Y, Moriyama S, Ogawa S. Electron Transport Tuning of Graphene by Helium Ion Irradiation. Nano Ex 2022. [DOI: 10.1088/2632-959x/ac73ad] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Abstract
This article reviews charge carrier transport phenomena in single-layer graphene, which generates crystalline defects through helium-ion-beam irradiation using a helium-ion microscope. Crystalline defects act as electron scatterers, and the conductivity decays drastically with increase in ion dose. Real-time conductivity monitoring during ion beam scans over the graphene surface is also presented. Negative magnetoresistance is observed in defective graphene in cryogenic measurements under magnetic fields, suggesting that strong localisation occurred in this two-dimensional electron system, which survived even at room temperature. The localised state also contributes to inducing a transport gap around the Dirac point, where the density of states is at its minimum, and it enables field-effect control of the carrier transport by tuning the carrier density. The fabrication and operation of field-effect transistors with defective graphene channels are also demonstrated.
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19
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Zheng X, Zhai R, Zhang Z, Zhang B, Liu J, Razaq A, Ahmad MA, Raza R, Saleem M, Rizwan S, Jafri SHM, Li H, Papadakis R. Graphene-Oxide-Based Fluoro- and Chromo-Genic Materials and Their Applications. Molecules 2022; 27:molecules27062018. [PMID: 35335380 PMCID: PMC8951247 DOI: 10.3390/molecules27062018] [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] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/25/2022] [Revised: 03/18/2022] [Accepted: 03/18/2022] [Indexed: 11/16/2022]
Abstract
Composite materials and their applications constitute a hot field of research nowadays due to the fact that they comprise a combination of the unique properties of each component of which they consist. Very often, they exhibit better performance and properties compared to their combined building blocks. Graphene oxide (GO), as the most widely used derivative of graphene, has attracted widespread attention because of its excellent properties. Abundant oxygen-containing functional groups on GO can provide various reactive sites for chemical modification or functionalization of GO, which in turn can be used to develop novel GO-based composites. This review outlines the most recent advances in the field of novel dyes and pigments encompassing GO as a key ingredient or as an important cofactor. The interactions of graphene with other materials/compounds are highlighted. The special structure and unique properties of GO have a great effect on the performance of fabricated hybrid dyes and pigments by enhancing the color performance of dyes, the anticorrosion properties of pigments, the viscosity and rheology of inks, etc., which further expands the applications of dyes and pigments in dyeing, optical elements, solar-thermal energy storage, sensing, coatings, and microelectronics devices. Finally, challenges in the current development as well as the future prospects of GO-based dyes and pigments are also discussed. This review provides a reference for the further exploration of novel dyes and pigments.
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Affiliation(s)
- Xiaoxiao Zheng
- Shandong Technology Centre of Nanodevices and Integration, School of Microelectronics, Shandong University, Jinan 250101, China; (X.Z.); (R.Z.); (Z.Z.); (B.Z.)
| | - Rongli Zhai
- Shandong Technology Centre of Nanodevices and Integration, School of Microelectronics, Shandong University, Jinan 250101, China; (X.Z.); (R.Z.); (Z.Z.); (B.Z.)
| | - Zihao Zhang
- Shandong Technology Centre of Nanodevices and Integration, School of Microelectronics, Shandong University, Jinan 250101, China; (X.Z.); (R.Z.); (Z.Z.); (B.Z.)
| | - Baoqing Zhang
- Shandong Technology Centre of Nanodevices and Integration, School of Microelectronics, Shandong University, Jinan 250101, China; (X.Z.); (R.Z.); (Z.Z.); (B.Z.)
| | - Jiangwei Liu
- School of Energy and Power Engineering, Shandong University, Jinan 250061, China;
| | - Aamir Razaq
- Department of Physics, COMSATS University Islamabad, Lahore Campus, Lahore 54000, Pakistan; (A.R.); (M.A.A.); (R.R.)
| | - Muhammad Ashfaq Ahmad
- Department of Physics, COMSATS University Islamabad, Lahore Campus, Lahore 54000, Pakistan; (A.R.); (M.A.A.); (R.R.)
| | - Rizwan Raza
- Department of Physics, COMSATS University Islamabad, Lahore Campus, Lahore 54000, Pakistan; (A.R.); (M.A.A.); (R.R.)
| | - Muhammad Saleem
- Institute of Physics, The Islamia University of Bahawalpur, Bahawalpur 63100, Pakistan;
| | - Syed Rizwan
- Department of Physics, National University of Sciences and Technology, Islamabad 44000, Pakistan;
| | - Syed Hassan Mujtaba Jafri
- Department of Electrical Engineering, Mirpur University of Science and Technology (MUST), Mirpur 10250, Azad Jammu and Kashmir, Pakistan;
| | - Hu Li
- Shandong Technology Centre of Nanodevices and Integration, School of Microelectronics, Shandong University, Jinan 250101, China; (X.Z.); (R.Z.); (Z.Z.); (B.Z.)
- Department of Materials Science and Engineering, Uppsala University, 75121 Uppsala, Sweden
- Correspondence: (H.L.); (R.P.)
| | - Raffaello Papadakis
- Department of Chemistry, Uppsala University, 75120 Uppsala, Sweden
- TdB Labs AB, Uppsala Business Park, 75450 Uppsala, Sweden
- Correspondence: (H.L.); (R.P.)
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20
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Khabibrakhmanov AI, Sorokin PB. Electronic properties of graphene oxide: nanoroads towards novel applications. Nanoscale 2022; 14:4131-4144. [PMID: 35175269 DOI: 10.1039/d2nr00251e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
In this work, we suggest an approach to manipulate the electronic properties of graphene oxide in a controllable manner. We study graphene nanoroads paved inside graphene oxide using density functional calculations. We show that this patterning allows transforming an insulator, graphene oxide, into a semiconductor or metal depending on the orientation of the nanoroads and their magnetic state. As a semiconductor, patterned graphene oxide is characterized by notably low effective masses of charge carriers. Additionally, we demonstrate the possibility to force the transition from a semiconducting to a half-metallic state in a controllable manner, by application of an external electric field. We believe that this remarkable opportunity to combine and control the electronic and magnetic properties of a material within a single sheet of graphene oxide paves the way towards new applications of graphene-oxide-based devices in 2D optoelectronics and spintronics.
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Affiliation(s)
- Almaz I Khabibrakhmanov
- National University of Science and Technology MISIS, 4 Leninskiy prospekt, Moscow, 119049, Russian Federation.
- Moscow Institute of Physics and Technology (National Research University), 9 Institutskiy per., Dolgoprudny, Moscow Region, 141701, Russian Federation
- Department of Physics and Materials Science, University of Luxembourg, L-1511 Luxembourg City, Luxembourg
| | - Pavel B Sorokin
- National University of Science and Technology MISIS, 4 Leninskiy prospekt, Moscow, 119049, Russian Federation.
- Moscow Institute of Physics and Technology (National Research University), 9 Institutskiy per., Dolgoprudny, Moscow Region, 141701, Russian Federation
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21
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Alihosseini M, Ghasemi S, Ahmadkhani S, Alidoosti M, Esfahani DN, Peeters FM, Neek-Amal M. Electronic Properties of Oxidized Graphene: Effects of Strain and an Electric Field on Flat Bands and the Energy Gap. J Phys Chem Lett 2022; 13:66-74. [PMID: 34958221 DOI: 10.1021/acs.jpclett.1c03286] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
A multiscale modeling and simulation approach, including first-principles calculations, ab initio molecular dynamics simulations, and a tight binding approach, is employed to study band flattening of the electronic band structure of oxidized monolayer graphene. The width of flat bands can be tuned by strain, the external electric field, and the density of functional groups and their distribution. A transition to a conducting state is found for monolayer graphene with impurities when it is subjected to an electric field of ∼1.0 V/Å. Several parallel impurity-induced flat bands appear in the low-energy spectrum of monolayer graphene when the number of epoxy groups is changed. The width of the flat band decreases with an increase in tensile strain but is independent of the electric field strength. Here an alternative and easy route for obtaining band flattening in thermodynamically stable functionalized monolayer graphene is introduced. Our work discloses a new avenue for research on band flattening in monolayer graphene.
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Affiliation(s)
- M Alihosseini
- Department of Physics, Shahid Rajaee University, Lavizan, Tehran 16785-136, Iran
| | - S Ghasemi
- Department of Physics, Shahid Rajaee University, Lavizan, Tehran 16785-136, Iran
| | - S Ahmadkhani
- Department of Physics, Shahid Rajaee University, Lavizan, Tehran 16785-136, Iran
| | - M Alidoosti
- Pasargad Institute for Advanced Innovative Solutions (PIAIS), Tehran 1991633357, Iran
| | - D Nasr Esfahani
- Pasargad Institute for Advanced Innovative Solutions (PIAIS), Tehran 1991633357, Iran
- Department of Converging Technologies, Khatam University, Tehran 1991633357, Iran
| | - F M Peeters
- Departement Fysica, Universiteit Antwerpen, Groenenborgerlaan 171, B-2020 Antwerpen, Belgium
| | - M Neek-Amal
- Department of Physics, Shahid Rajaee University, Lavizan, Tehran 16785-136, Iran
- Departement Fysica, Universiteit Antwerpen, Groenenborgerlaan 171, B-2020 Antwerpen, Belgium
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22
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Venkatesh G, Suganesh R, Jayaprakash J, Srinivasan M, Prabu K. Perovskite type BaSnO3-reduced graphene oxide nanocomposite for photocatalytic decolourization of organic dye pollutant. Chem Phys Lett 2022; 787:139237. [DOI: 10.1016/j.cplett.2021.139237] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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23
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Marrani AG, Motta A, Amato F, Schrebler R, Zanoni R, Dalchiele EA. Effect of Electrolytic Medium on the Electrochemical Reduction of Graphene Oxide on Si(111) as Probed by XPS. Nanomaterials (Basel) 2021; 12:43. [PMID: 35009993 DOI: 10.3390/nano12010043] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/25/2021] [Revised: 12/20/2021] [Accepted: 12/21/2021] [Indexed: 01/15/2023]
Abstract
The wafer-scale integration of graphene is of great importance in view of its numerous applications proposed or underway. A good graphene–silicon interface requires the fine control of several parameters and may turn into a high-cost material, suitable for the most advanced applications. Procedures that can be of great use for a wide range of applications are already available, but others are to be found, in order to modulate the offer of different types of materials, at different levels of sophistication and use. We have been exploring different electrochemical approaches over the last 5 years, starting from graphene oxide and resulting in graphene deposited on silicon-oriented surfaces, with the aim of understanding the reactions leading to the re-establishment of the graphene network. Here, we report how a proper choice of both the chemical environment and electrochemical conditions can lead to a more controlled and tunable graphene–Si(111) interface. This can also lead to a deeper understanding of the electrochemical reactions involved in the evolution of graphene oxide to graphene under electrochemical reduction. Results from XPS, the most suitable tool to follow the presence and fate of functional groups at the graphene surface, are reported, together with electrochemical and Raman findings.
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Abstract
The adsorption of graphene-oxide (GO) nanoparticles at the interface between water and vapor was analyzed using all-atom molecular simulations for single and multiple particles. For a single GO particle, our results indicate that the adsorption energy does not scale linearly with the surface coverage of oxygen groups, unlike typically assumed for Janus colloids. Our results also show that the surface activity of the particle depends on the number of surface oxygen groups as well as on their distribution: for a given number of oxygen groups, a GO particle with a patched surface was found to be more surface active than a particle with evenly distributed groups. Then, to understand what sets the thickness of GO layers at interfaces, the adsorption energy of a test GO particle was measured in the presence of multiple GO particles already adsorbed at the interface. Our results indicate that in the case of high degree of oxidation, particle-particle interactions at the water-vapor interface hinder the adsorption of the test particle. In the case of a low degree of oxidation, however, clustering and stacking of GO particles dominate the adsorption behavior, and particle-particle interactions favor the adsorption of the test particle. These results highlight the complexity of multiple particle adsorption and the limitations of single-particle adsorption models when applied to GO at a relatively high surface concentration.
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Affiliation(s)
- Simon Gravelle
- School of Engineering and Material Science, Queen Mary University of London, London E1 4NS, United Kingdom
| | - Lorenzo Botto
- Process and Energy Department, 3ME Faculty of Mechanical, Maritime and Materials Engineering, TU Delft, Delft 2628 CD, The Netherlands
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25
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Li F, Han W, Cao Z, Ji S, Wang H, Wang L, Wu H, Zhu Y, Pu Y. Two novel semiconducting B 2 CO monolayers with high carrier mobilities. J Comput Chem 2021; 42:2024-2030. [PMID: 34427337 DOI: 10.1002/jcc.26735] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2021] [Revised: 07/22/2021] [Accepted: 07/28/2021] [Indexed: 11/09/2022]
Abstract
The design of new two-dimensional (2D) materials with moderate band gaps and high carrier mobility is an important aspiration for materials innovation. Recent studies have shown that boron and oxygen atoms can be integrated into the graphene lattice to form a stable B-C-O monolayer structure. To search for the most energetically stable configuration for 2D B-C-O, here, we theoretically propose two new 2D B-C-O crystal structures with a stoichiometric ratio of 2:1:1, namely monolayer (1 L) C3v - and C2v -B2 CO. Two configurations have 0.09 and 0.03 eV/unit cell lower energies than the reported 1 L Cs -B2 CO configuration (Nanoscale 2016, 8, 8910). This result is further confirmed by particle swarm optimization (PSO) calculations. According to the chemical bonding analysis, 1 L C3v -B2 CO with a quasi-planar configuration has the lowest energy, which is consisted of three strong B'-O σ-bonds, three B″-C σ-bonds, and one B'-C σ-bond. As a result, 2D B2 CO has an ultra-high mechanical strength of ~366 J m-2 , comparable to graphene ~352 J m-2 . In addition, 1 L C3v -B2 CO is a semiconductor with an HSE06 bandgap of 2.57 eV, and it has a high electron mobility of up to ~150 cm2 v-1 s-1 . The high kinetic and thermodynamic stabilities of both 1 L C3v - and C2v -B2 CO were confirmed according to phonon dispersion and molecular dynamic simulation. Comparable to that of crystalline silicon, 1 L C3v -B2 CO also shows a high light absorption intensity in the 400-550 nm region. Therefore, 2D C3v -B2 CO will have promising applications in semiconductor devices and photodetectors.
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Affiliation(s)
- Feng Li
- New Energy Technology Engineering Laboratory of Jiangsu Provence & School of Science, Nanjing University of Posts and Telecommunications (NUPT), Nanjing, China
| | - Weibo Han
- New Energy Technology Engineering Laboratory of Jiangsu Provence & School of Science, Nanjing University of Posts and Telecommunications (NUPT), Nanjing, China
| | - Zhi Cao
- New Energy Technology Engineering Laboratory of Jiangsu Provence & School of Science, Nanjing University of Posts and Telecommunications (NUPT), Nanjing, China
| | - Shilei Ji
- New Energy Technology Engineering Laboratory of Jiangsu Provence & School of Science, Nanjing University of Posts and Telecommunications (NUPT), Nanjing, China
| | - Haiyun Wang
- New Energy Technology Engineering Laboratory of Jiangsu Provence & School of Science, Nanjing University of Posts and Telecommunications (NUPT), Nanjing, China
| | - Lixia Wang
- New Energy Technology Engineering Laboratory of Jiangsu Provence & School of Science, Nanjing University of Posts and Telecommunications (NUPT), Nanjing, China
| | - Hong Wu
- New Energy Technology Engineering Laboratory of Jiangsu Provence & School of Science, Nanjing University of Posts and Telecommunications (NUPT), Nanjing, China
| | - Yuping Zhu
- New Energy Technology Engineering Laboratory of Jiangsu Provence & School of Science, Nanjing University of Posts and Telecommunications (NUPT), Nanjing, China
| | - Yong Pu
- New Energy Technology Engineering Laboratory of Jiangsu Provence & School of Science, Nanjing University of Posts and Telecommunications (NUPT), Nanjing, China
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26
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Wang Y, Godin R, Durrant JR, Tang J. Efficient Hole Trapping in Carbon Dot/Oxygen-Modified Carbon Nitride Heterojunction Photocatalysts for Enhanced Methanol Production from CO 2 under Neutral Conditions. Angew Chem Int Ed Engl 2021; 60:20811-20816. [PMID: 34288316 PMCID: PMC8519127 DOI: 10.1002/anie.202105570] [Citation(s) in RCA: 51] [Impact Index Per Article: 17.0] [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: 04/24/2021] [Revised: 06/28/2021] [Indexed: 12/04/2022]
Abstract
Artificial photosynthesis of alcohols from CO2 is still unsatisfactory owing to the rapid charge relaxation compared to the sluggish photoreactions and the oxidation of alcohol products. Here, we demonstrate that CO2 is reduced to methanol with 100 % selectivity using water as the only electron donor on a carbon nitride-like polymer (FAT) decorated with carbon dots. The quantum efficiency of 5.9 % (λ=420 nm) is 300 % higher than the previously reported carbon nitride junction. Using transient absorption spectroscopy, we observed that holes in FAT could be extracted by the carbon dots with nearly 75 % efficiency before they become unreactive by trapping. Extraction of holes resulted in a greater density of photoelectrons, indicative of reduced recombination of shorter-lived reactive electrons. This work offers a strategy to promote photocatalysis by increasing the amount of reactive photogenerated charges via structure engineering and extraction before energy losses by deep trapping.
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Affiliation(s)
- Yiou Wang
- Department of Chemical EngineeringUCLTorrington PlaceLondonWC1E 7JEUK
- Chair for Photonics and Optoelectronics, Nano-Institute MunichLudwig-Maximilians-Universität MünchenKöniginstr. 1080539MunichGermany
| | - Robert Godin
- Department of Chemistry and Center for Plastic ElectronicsImperial College LondonExhibition RoadLondonSW7 2AZUK
- Department of ChemistryThe University of British ColumbiaKelownaBCV1V 1V7Canada
| | - James R. Durrant
- Department of Chemistry and Center for Plastic ElectronicsImperial College LondonExhibition RoadLondonSW7 2AZUK
| | - Junwang Tang
- Department of Chemical EngineeringUCLTorrington PlaceLondonWC1E 7JEUK
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27
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Wang Y, Godin R, Durrant JR, Tang J. Efficient Hole Trapping in Carbon Dot/Oxygen‐Modified Carbon Nitride Heterojunction Photocatalysts for Enhanced Methanol Production from CO
2
under Neutral Conditions. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202105570] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- Yiou Wang
- Department of Chemical Engineering UCL Torrington Place London WC1E 7JE UK
- Chair for Photonics and Optoelectronics, Nano-Institute Munich Ludwig-Maximilians-Universität München Königinstr. 10 80539 Munich Germany
| | - Robert Godin
- Department of Chemistry and Center for Plastic Electronics Imperial College London Exhibition Road London SW7 2AZ UK
- Department of Chemistry The University of British Columbia Kelowna BC V1V 1V7 Canada
| | - James R. Durrant
- Department of Chemistry and Center for Plastic Electronics Imperial College London Exhibition Road London SW7 2AZ UK
| | - Junwang Tang
- Department of Chemical Engineering UCL Torrington Place London WC1E 7JE UK
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28
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Buonocore F, Capasso A, Celino M, Lisi N, Pulci O. Tuning the Electronic Properties of Graphane via Hydroxylation: An Ab Initio Study. J Phys Chem C Nanomater Interfaces 2021; 125:16316-16323. [PMID: 34476036 PMCID: PMC8397341 DOI: 10.1021/acs.jpcc.1c04397] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Revised: 06/30/2021] [Indexed: 06/13/2023]
Abstract
The thermodynamic stability of hydroxylated graphane, that is, fully sp3 graphene derivatives coordinated with -H and -OH groups, has been recently demonstrated by ab initio calculations. Within the density functional theory approach, we investigate the electronic property modifications of graphane by progressive hydroxylation, that is, by progressively substituting -H with -OH groups. When 50% of graphane is hydroxylated, the energy bandgap reaches its largest value of 6.68 eV. The electronic affinity of 0.8 eV for graphane can widely change in the 0.28-1.60 eV range depending on the geometric configuration. Hydroxylated graphane has two interfaces with vacuum, hence its electron affinity can be different on each interface with the formation of an intrinsic dipole perpendicular to the monolayer. We envisage the possibility of using hydroxylated graphane allotropes with tunable electronic affinity to serve as interfacial layers in 2D material-based heterojunctions.
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Affiliation(s)
| | - Andrea Capasso
- International
Iberian Nanotechnology Laboratory, 4715-330 Braga, Portugal
| | | | - Nicola Lisi
- ENEA,
Casaccia Research Centre, I-00123 Rome, Italy
| | - Olivia Pulci
- Department
of Physics, and INFN, University of Rome
Tor Vergata, I-00133 Rome, Italy
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29
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Zhu Z, Li X, Luo M, Chen M, Chen W, Yang P, Zhou X. Synthesis of carbon dots with high photocatalytic reactivity by tailoring heteroatom doping. J Colloid Interface Sci 2021; 605:330-341. [PMID: 34329982 DOI: 10.1016/j.jcis.2021.07.016] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Revised: 07/02/2021] [Accepted: 07/03/2021] [Indexed: 02/07/2023]
Abstract
The photocatalytic degradation of organic pollutant by carbon-based materials is still a challenge. Herein, xylose-derived carbon dots (X-CDs) and chitosan-derived CDs (C-CDs) were synthesized by heteroatoms-doping strategy. Although there is almost no difference in fluorescence emission behaviors, the two types of CDs demonstrated different advantages in photocatalysis and peroxymonosulfate (PMS) activation. Comparative research revealed that the X-CDs with doping of heteroatom S was superior in the separation of electron-hole pairs, resulting in a higher catalytic performance, while the S, N co-doped C-CDs can only exhibit high photocatalytic reactivity when they were coupled with PMS. The underlying reason is that the N-related functional groups with strong electron-donating property weakened the electron-trapping capacity of S-related energy level, but surface state resulting from this doping structures were conducive to promoting photo-generated electron transfer from C-CDs to PMS and played the primary role in organic oxidation. Thanks to the doping effect, both the X-CDs and C-CDs/PMS system displayed high photocatalytic performance for methylene blue removal under sunlight irradiation, showing almost 100% degradation efficiency in a 30 min period. The present study provides a valuable insight for the synthesis of CDs-based catalysts but also establishes a very promising catalytic oxidation system.
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Affiliation(s)
- Ziqi Zhu
- College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China; Fast-growing Tree & Agro-fibre Materials Engineering Center, Nanjing 210037, China
| | - Xinghui Li
- College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China; Fast-growing Tree & Agro-fibre Materials Engineering Center, Nanjing 210037, China
| | - Min Luo
- College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China; Fast-growing Tree & Agro-fibre Materials Engineering Center, Nanjing 210037, China
| | - Minzhi Chen
- College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China; Fast-growing Tree & Agro-fibre Materials Engineering Center, Nanjing 210037, China
| | - Weimin Chen
- College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China; Fast-growing Tree & Agro-fibre Materials Engineering Center, Nanjing 210037, China
| | - Pei Yang
- College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China; Fast-growing Tree & Agro-fibre Materials Engineering Center, Nanjing 210037, China.
| | - Xiaoyan Zhou
- College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China; Fast-growing Tree & Agro-fibre Materials Engineering Center, Nanjing 210037, China.
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30
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Vedhanayagam M, Raja IS, Molkenova A, Atabaev TS, Sreeram KJ, Han DW. Carbon Dots-Mediated Fluorescent Scaffolds: Recent Trends in Image-Guided Tissue Engineering Applications. Int J Mol Sci 2021; 22:5378. [PMID: 34065357 PMCID: PMC8190637 DOI: 10.3390/ijms22105378] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2021] [Revised: 05/17/2021] [Accepted: 05/17/2021] [Indexed: 11/23/2022] Open
Abstract
Regeneration of damaged tissues or organs is one of the significant challenges in tissue engineering and regenerative medicine. Many researchers have fabricated various scaffolds to accelerate the tissue regeneration process. However, most of the scaffolds are limited in clinical trials due to scaffold inconsistency, non-biodegradability, and lack of non-invasive techniques to monitor tissue regeneration after implantation. Recently, carbon dots (CDs) mediated fluorescent scaffolds are widely explored for the application of image-guided tissue engineering due to their controlled architecture, light-emitting ability, higher chemical and photostability, excellent biocompatibility, and biodegradability. In this review, we provide an overview of the recent advancement of CDs in terms of their different synthesis methods, tunable physicochemical, mechanical, and optical properties, and their application in tissue engineering. Finally, this review concludes the further research directions that can be explored to apply CDs in tissue engineering.
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Affiliation(s)
- Mohan Vedhanayagam
- CATERS Laboratory, CSIR-Central Leather Research Institute, Adyar, Chennai 600020, India;
| | - Iruthayapandi Selestin Raja
- BIO-IT Fusion Technology Research Institute, Pusan National University, Busan 46241, Korea; (I.S.R.); (A.M.)
| | - Anara Molkenova
- BIO-IT Fusion Technology Research Institute, Pusan National University, Busan 46241, Korea; (I.S.R.); (A.M.)
| | - Timur Sh. Atabaev
- Department of Chemistry, Nazarbayev University, Nur-Sultan 010000, Kazakhstan;
| | | | - Dong-Wook Han
- BIO-IT Fusion Technology Research Institute, Pusan National University, Busan 46241, Korea; (I.S.R.); (A.M.)
- Department of Cogno-Mechatronics Engineering, College of Nanoscience & Nanotechnology, Pusan National University, Busan 46241, Korea
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31
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Abstract
Brain-inspired neuromorphic computing which consist neurons and synapses, with an ability to perform complex information processing has unfolded a new paradigm of computing to overcome the von Neumann bottleneck. Electronic synaptic memristor devices which can compete with the biological synapses are indeed significant for neuromorphic computing. In this work, we demonstrate our efforts to develop and realize the graphene oxide (GO) based memristor device as a synaptic device, which mimic as a biological synapse. Indeed, this device exhibits the essential synaptic learning behavior including analog memory characteristics, potentiation and depression. Furthermore, spike-timing-dependent-plasticity learning rule is mimicked by engineering the pre- and post-synaptic spikes. In addition, non-volatile properties such as endurance, retentivity, multilevel switching of the device are explored. These results suggest that Ag/GO/fluorine-doped tin oxide memristor device would indeed be a potential candidate for future neuromorphic computing applications.
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Affiliation(s)
- Dwipak Prasad Sahu
- Magnetic Materials and Device Physics Laboratory, Department of Physics, Indian Institute of Technology Hyderabad, Hyderabad-502 285, India
| | - Prabana Jetty
- Magnetic Materials and Device Physics Laboratory, Department of Physics, Indian Institute of Technology Hyderabad, Hyderabad-502 285, India
| | - S Narayana Jammalamadaka
- Magnetic Materials and Device Physics Laboratory, Department of Physics, Indian Institute of Technology Hyderabad, Hyderabad-502 285, India
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32
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Zhao M, Shi J, Cai W, Liu K, Shen K, Li Z, Wang Y, Hu D. Advances on Graphene-Based Nanomaterials and Mesenchymal Stem Cell-Derived Exosomes Applied in Cutaneous Wound Healing. Int J Nanomedicine 2021; 16:2647-2665. [PMID: 33854313 PMCID: PMC8040697 DOI: 10.2147/ijn.s300326] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2021] [Accepted: 02/27/2021] [Indexed: 12/15/2022] Open
Abstract
Graphene is a new type of carbon nanomaterial discovered after fullerene and carbon nanotube. Due to the excellent biological properties such as biocompatibility, cell proliferation stimulating, and antibacterial properties, graphene and its derivatives have become emerging candidates for the development of novel cutaneous wound dressings and composite scaffolds. On the other hand, pre-clinical research on exosomes derived from mesenchymal stem cells (MSC-Exos) has been intensified for cell-free treatment in wound healing and cutaneous regeneration, via ameliorating the damaged microenvironment of the wound site. Here, we provide a comprehensive understanding of the latest studies and observations on the various effects of graphene-based nanomaterials (GBNs) and MSC-Exos during the cutaneous wound repair process, as well as the putative mechanisms thereof. In addition, we propose the possible forward directions of GBNs and MSC-Exos applications, expecting to promote the clinical transformation.
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Affiliation(s)
- Ming Zhao
- Department of Burns and Cutaneous Surgery, Xijing Hospital, Fourth Military Medical University, Xi’an, Shannxi, 710032, People’s Republic of China
| | - Jihong Shi
- Department of Burns and Cutaneous Surgery, Xijing Hospital, Fourth Military Medical University, Xi’an, Shannxi, 710032, People’s Republic of China
| | - Weixia Cai
- Department of Burns and Cutaneous Surgery, Xijing Hospital, Fourth Military Medical University, Xi’an, Shannxi, 710032, People’s Republic of China
| | - Kaituo Liu
- Department of Burns and Cutaneous Surgery, Xijing Hospital, Fourth Military Medical University, Xi’an, Shannxi, 710032, People’s Republic of China
| | - Kuo Shen
- Department of Burns and Cutaneous Surgery, Xijing Hospital, Fourth Military Medical University, Xi’an, Shannxi, 710032, People’s Republic of China
| | - Zichao Li
- Department of Burns and Cutaneous Surgery, Xijing Hospital, Fourth Military Medical University, Xi’an, Shannxi, 710032, People’s Republic of China
| | - Yunchuan Wang
- Department of Burns and Cutaneous Surgery, Xijing Hospital, Fourth Military Medical University, Xi’an, Shannxi, 710032, People’s Republic of China
| | - Dahai Hu
- Department of Burns and Cutaneous Surgery, Xijing Hospital, Fourth Military Medical University, Xi’an, Shannxi, 710032, People’s Republic of China
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33
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Liu W, Speranza G. Tuning the Oxygen Content of Reduced Graphene Oxide and Effects on Its Properties. ACS Omega 2021; 6:6195-6205. [PMID: 33718710 PMCID: PMC7948250 DOI: 10.1021/acsomega.0c05578] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Accepted: 02/05/2021] [Indexed: 05/24/2023]
Abstract
The need to recover the graphene properties in terms of electrical and thermal conductivity calls for the application of reduction processes leading to the removal of oxygen atoms from the graphene oxide sheet surface. The recombination of carbon-carbon double bonds causes a partial recovery of the original graphene properties mainly limited by the presence of residual oxygen atoms and lattice defects. However, the loss of polar oxygen-based functional groups renders the material dispersibility rather complicated. In addition, oxygen-containing functional groups are reaction sites useful to further bind active molecules to engineer the reduced graphene sheets. For these reasons, a variety of chemical processes are described in the literature to reduce the graphene oxide. However, it is greatly important to select a chemical process enabling a thin modulation of the residual oxygen content thus tuning the properties of the final product. In this work, we will present a chemical-processing technique based on the hydroiodic acid to carefully control the degree of residual oxidation. Graphene oxides were reduced using hydroiodic acid with concentrations from 0.06 to 0.95 mol L-1. Their properties were characterized in detail and tested, and the results showed that their oxygen content was finely tuned from 33.6 to 10.7 atom %. This allows carefully tailoring the material properties with respect to the desired application, which is exemplified by the variation of the bulk resistance from 92 Ω to 14.8 MΩ of the film from the obtained rGO.
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Affiliation(s)
- Wei Liu
- Fondazione
Bruno Kessler, Via Sommarive 18, Trento 38123, Italy
| | - Giorgio Speranza
- Fondazione
Bruno Kessler, Via Sommarive 18, Trento 38123, Italy
- Department
of Industrial Engineering, University of
Trento, Via Sommarive
9, Trento 38123, Italy
- Istituto
di Fotonica e Nanotecnologie, IFN-CNR, Via Alla Cascata 56/C, Trento 38123, Italy
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34
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Jin H, Chen Y, Zhang L, Wan R, Zou Z, Li H, Gao Y. Positive and negative photoconductivity characteristics in CsPbBr 3/graphene heterojunction. Nanotechnology 2021; 32:085202. [PMID: 33157541 DOI: 10.1088/1361-6528/abc850] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Broadband response photodetectors have received great research interest in optical sensing field. Usually, materials with positive photoconductivity (PPC) are general and the lack of negative photoconductivity (NPC) materials limits the application of photoelectric effect, especially in the broadband photodetecting field. Therefore, the finding of NPC materials is very important. Integrating PPC and NPC response into a single device is extremely meaningful to the development of broadband photodetector. In this work, we fabricated CsPbBr3 nanocrystals (NCs)-multilayered graphene heterojunction, which achieved persistent NPC response to ultra violet (300-390 nm) and PPC response to visible light (420-510 nm). The persistent NPC relies on the desorption of H2O vapor, and varies its intensity with the power intensity of laser. The PPC relies on the holes transmission from NCs to graphene. The recombination of NPC and PPC effect provides background knowledge for the development of broadband photodetector.
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Affiliation(s)
- Haonan Jin
- Center for Nanoscale Characterization & Devices (CNCD), School of Physics & Wuhan National Laboratory for Optoelectronics (WNLO), Huazhong University of Science and Technology (HUST), Wuhan 430074, People's Republic of China
| | - Yibo Chen
- Center for Nanoscale Characterization & Devices (CNCD), School of Physics & Wuhan National Laboratory for Optoelectronics (WNLO), Huazhong University of Science and Technology (HUST), Wuhan 430074, People's Republic of China
| | - Louwen Zhang
- Center for Nanoscale Characterization & Devices (CNCD), School of Physics & Wuhan National Laboratory for Optoelectronics (WNLO), Huazhong University of Science and Technology (HUST), Wuhan 430074, People's Republic of China
| | - Rui Wan
- Center for Nanoscale Characterization & Devices (CNCD), School of Physics & Wuhan National Laboratory for Optoelectronics (WNLO), Huazhong University of Science and Technology (HUST), Wuhan 430074, People's Republic of China
| | - Zhengguang Zou
- College of Materials Science and Engineering, Guangxi Key Laboratory of Optical and Electronic Materials and Devices, Guilin University of Technology, Guilin 541004, People's Republic of China
| | - Haixia Li
- Hubei Key Laboratory of Optical Information and Pattern Recognition School of Mathematics and Physics, Wuhan Institute of Technology, Wuhan 430205, People's Republic of China
| | - Yihua Gao
- Center for Nanoscale Characterization & Devices (CNCD), School of Physics & Wuhan National Laboratory for Optoelectronics (WNLO), Huazhong University of Science and Technology (HUST), Wuhan 430074, People's Republic of China
- College of Materials Science and Engineering, Guangxi Key Laboratory of Optical and Electronic Materials and Devices, Guilin University of Technology, Guilin 541004, People's Republic of China
- Hubei Key Laboratory of Optical Information and Pattern Recognition School of Mathematics and Physics, Wuhan Institute of Technology, Wuhan 430205, People's Republic of China
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35
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Zhou Q, Li D, Wang T, Hu X. Leaching of graphene oxide nanosheets in simulated soil and their influences on microbial communities. J Hazard Mater 2021; 404:124046. [PMID: 33035906 DOI: 10.1016/j.jhazmat.2020.124046] [Citation(s) in RCA: 45] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Revised: 09/02/2020] [Accepted: 09/17/2020] [Indexed: 06/11/2023]
Abstract
With the wide use of graphene-like nanosheets, especially in agriculture, their release into the environment, it is crucial to grasp the fate of nanosheets in soil and minimum ecological risks. The present work discovered that leaching and migration of nanosheets (rGO) in soil is affected by soil porosity and adsorption processes. And the contents of rGO-Pd in soil layers and leachate increased and then decreased with the decreased of soil porosity. Moreover, physicochemical properties of rGO-Pd nanosheets changed by leaching processes, especially the changes of morphology, thickness and oxygen functional groups. Leaching of rGO-Pd also interfered the soil microbial homeostasis accompanied by the increase of microbial species richness and community diversity. In addition, rGO-Pd altered the usage of carbon sources by edaphon. The utilization of carbon sources by soil microbes, such as polymers, sugars, phenolic acids, carboxylic acids, amino acids, and amines, was also reduced by nanosheets. These findings provide new insights into environmental behaviors of nanomaterials and nanogeochemistry.
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Affiliation(s)
- Qixing Zhou
- Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education)/Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China.
| | - Dandan Li
- Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education)/Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
| | - Tong Wang
- Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education)/Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
| | - Xiangang Hu
- Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education)/Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
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36
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Lamon S, Wu Y, Zhang Q, Liu X, Gu M. Nanoscale optical writing through upconversion resonance energy transfer. Sci Adv 2021; 7:eabe2209. [PMID: 33627427 PMCID: PMC7904262 DOI: 10.1126/sciadv.abe2209] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Accepted: 01/05/2021] [Indexed: 05/28/2023]
Abstract
Nanoscale optical writing using far-field super-resolution methods provides an unprecedented approach for high-capacity data storage. However, current nanoscale optical writing methods typically rely on photoinitiation and photoinhibition with high beam intensity, high energy consumption, and short device life span. We demonstrate a simple and broadly applicable method based on resonance energy transfer from lanthanide-doped upconversion nanoparticles to graphene oxide for nanoscale optical writing. The transfer of high-energy quanta from upconversion nanoparticles induces a localized chemical reduction in graphene oxide flakes for optical writing, with a lateral feature size of ~50 nm (1/20th of the wavelength) under an inhibition intensity of 11.25 MW cm-2 Upconversion resonance energy transfer may enable next-generation optical data storage with high capacity and low energy consumption, while offering a powerful tool for energy-efficient nanofabrication of flexible electronic devices.
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Affiliation(s)
- S Lamon
- Centre for Artificial-Intelligence Nanophotonics, School of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
- Laboratory of Artificial-Intelligence Nanophotonics, School of Science, RMIT University, Melbourne 3001, Australia
| | - Y Wu
- Department of Chemistry, National University of Singapore, Singapore 117543, Singapore
| | - Q Zhang
- Centre for Artificial-Intelligence Nanophotonics, School of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
| | - X Liu
- Department of Chemistry, National University of Singapore, Singapore 117543, Singapore
- The N.1 Institute for Health, National University of Singapore, Singapore 117456, Singapore
| | - M Gu
- Centre for Artificial-Intelligence Nanophotonics, School of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China.
- Laboratory of Artificial-Intelligence Nanophotonics, School of Science, RMIT University, Melbourne 3001, Australia
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37
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Wu J, Jia L, Zhang Y, Qu Y, Jia B, Moss DJ. Graphene Oxide for Integrated Photonics and Flat Optics. Adv Mater 2021; 33:e2006415. [PMID: 33258178 DOI: 10.1002/adma.202006415] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2020] [Revised: 11/05/2020] [Indexed: 05/15/2023]
Abstract
With superior optical properties, high flexibility in engineering its material properties, and strong capability for large-scale on-chip integration, graphene oxide (GO) is an attractive solution for on-chip integration of 2D materials to implement functional integrated photonic devices capable of new features. Over the past decade, integrated GO photonics, representing an innovative merging of integrated photonic devices and thin GO films, has experienced significant development, leading to a surge in many applications covering almost every field of optical sciences such as photovoltaics, optical imaging, sensing, nonlinear optics, and light emitting. This paper reviews the recent advances in this emerging field, providing an overview of the optical properties of GO as well as methods for the on-chip integration of GO. The main achievements made in GO hybrid integrated photonic devices for diverse applications are summarized. The open challenges as well as the potential for future improvement are also discussed.
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Affiliation(s)
- Jiayang Wu
- Optical Sciences Centre, Swinburne University of Technology, Hawthorn, VIC, 3122, Australia
| | - Linnan Jia
- Optical Sciences Centre, Swinburne University of Technology, Hawthorn, VIC, 3122, Australia
| | - Yuning Zhang
- Optical Sciences Centre, Swinburne University of Technology, Hawthorn, VIC, 3122, Australia
| | - Yang Qu
- Optical Sciences Centre, Swinburne University of Technology, Hawthorn, VIC, 3122, Australia
| | - Baohua Jia
- Centre for Translational Atomaterials, Swinburne University of Technology, Hawthorn, VIC, 3122, Australia
| | - David J Moss
- Optical Sciences Centre, Swinburne University of Technology, Hawthorn, VIC, 3122, Australia
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Shit S, Samanta P, Bolar S, Murmu NC, Kuila T. Alteration in electrocatalytic water splitting activity of reduced graphene oxide through simultaneous and individual doping of Lewis acid/base center. Electrochim Acta 2020. [DOI: 10.1016/j.electacta.2020.137146] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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Patil R, Patel H, Pillai SB, Jha PK, Bahadur P, Tiwari S. Influence of surface oxygen clusters upon molecular stacking of paclitaxel over graphene oxide sheets. Materials Science and Engineering: C 2020; 116:111232. [DOI: 10.1016/j.msec.2020.111232] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2020] [Revised: 06/10/2020] [Accepted: 06/21/2020] [Indexed: 12/14/2022]
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Zhuo HY, Zhang X, Liang JX, Yu Q, Xiao H, Li J. Theoretical Understandings of Graphene-based Metal Single-Atom Catalysts: Stability and Catalytic Performance. Chem Rev 2020; 120:12315-12341. [PMID: 33112608 DOI: 10.1021/acs.chemrev.0c00818] [Citation(s) in RCA: 152] [Impact Index Per Article: 38.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Research on heterogeneous single-atom catalysts (SACs) has become an emerging frontier in catalysis science because of their advantages in high utilization of noble metals, precisely identified active sites, high selectivity, and tunable activity. Graphene, as a one-atom-thick two-dimensional carbon material with unique structural and electronic properties, has been reported to be a superb support for SACs. Herein, we provide an overview of recent progress in investigations of graphene-based SACs. Among the large number of publications, we will selectively focus on the stability of metal single-atoms (SAs) anchored on different sites of graphene support and the catalytic performances of graphene-based SACs for different chemical reactions, including thermocatalysis and electrocatalysis. We will summarize the fundamental understandings on the electronic structures and their intrinsic connection with catalytic properties of graphene-based SACs, and also provide a brief perspective on the future design of efficient SACs with graphene and graphene-like materials.
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Affiliation(s)
- Hong-Ying Zhuo
- Department of Chemistry and Key Laboratory of Organic Optoelectronics & Molecular Engineering of Ministry of Education, Tsinghua University, Beijing 100084, China.,State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering, China University of Petroleum, Beijing 102249, China
| | - Xin Zhang
- State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering, China University of Petroleum, Beijing 102249, China
| | - Jin-Xia Liang
- Department of Chemistry, Southern University of Science and Technology, Shenzhen, Guangdong 518055, China
| | - Qi Yu
- School of Materials Science and Engineering, Institute of Graphene at Shaanxi Key Laboratory of Catalysis, Shaanxi University of Technology, Hanzhong 723001, China
| | - Hai Xiao
- Department of Chemistry and Key Laboratory of Organic Optoelectronics & Molecular Engineering of Ministry of Education, Tsinghua University, Beijing 100084, China
| | - Jun Li
- Department of Chemistry and Key Laboratory of Organic Optoelectronics & Molecular Engineering of Ministry of Education, Tsinghua University, Beijing 100084, China.,Department of Chemistry, Southern University of Science and Technology, Shenzhen, Guangdong 518055, China
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41
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Bobb JA, Rodrigues CJ, El-Shall MS, Tibbetts KM. Laser-assisted synthesis of gold-graphene oxide nanocomposites: effect of pulse duration. Phys Chem Chem Phys 2020; 22:18294-18303. [PMID: 32785346 DOI: 10.1039/d0cp02953j] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Laser photoreduction of metal ions onto graphene oxide (GO) is a facile, environmentally friendly method to produce functional metal-GO nanocomposites for a variety of applications. This work compares Au-GO nanocomposites prepared by photoreduction of [AuCl4]- in aqueous GO solution using laser pulses of nanosecond (ns) and femtosecond (fs) duration. The presence of GO significantly accelerates the [AuCl4]- photoreduction rate, with a more pronounced effect using ns laser pulses. This difference is rationalized in terms of the stronger interaction of the 532 nm laser wavelength and long pulse duration with the GO. Both the ns and fs lasers produce significant yields of sub-4 nm Au nanoparticles attached to GO, albeit with different size distributions: a broad 5.8 ± 1.9 nm distribution for the ns laser and two distinct distributions of 3.5 ± 0.8 and 10.1 ± 1.4 nm for the fs laser. Despite these differences, both Au-GO nanocomposites had the same high catalytic activity towards p-nitrophenol reduction as compared to unsupported 4-5 nm Au nanoparticles. These results point to the key role of GO photoexcitation in catalyzing metal ion reduction and indicate that both ns and fs lasers are suitable for producing functional metal-GO nanocomposites.
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Affiliation(s)
- Julian A Bobb
- Department of Chemistry, Virginia Commonwealth University, Richmond, VA 23284, USA.
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Lin CF, Chung LH, Lin GY, Chang MC, Lee CY, Tai NH. Enhancing the Efficiency of a Forward Osmosis Membrane with a Polydopamine/Graphene Oxide Layer Prepared Via the Modified Molecular Layer-by-Layer Method. ACS Omega 2020; 5:18738-18745. [PMID: 32775875 PMCID: PMC7407550 DOI: 10.1021/acsomega.0c01752] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2020] [Accepted: 07/07/2020] [Indexed: 05/06/2023]
Abstract
Water scarcity is one of the most critical problems that humans have to face. Working toward solving this problem, we have developed a thin-film composite (TFC) membrane using the modified molecular layer-by-layer (modified mLBL) method to fabricate polyamide (PA) active layers on different substrates. Besides, it has been found that graphene oxide (GO) contains abundant functional groups such as hydroxyl and epoxide groups, which are able to improve both the physical and chemical properties of the forward osmosis (FO) membrane. Thus, we have employed graphene oxide (GO) as the substrate and used the modified mLBL method to prepare active polydopamine/graphene oxide (PDA/GO) layers to enhance the water flux of the forward osmosis (FO) membrane. PDA/GO-coated layers could enhance the hydrophilic nature of the substrate and lower its surface roughness, which would facilitate the formation of the PA layer. Moreover, the PDA/GO coating can be applied to all substrates because of the high degree of adhesion of PDA to different substrates. In this study, the highly hydrophilic poly(vinylidene fluoride) membrane is superior in FO properties, with a water flux of 17.32 LMH and a reverse solute flux of 4.34 gMH. In addition, an excellent performance of 60.15 LMH and 14.88 gMH can be achieved when the pressure-retarded osmosis (PRO) test mode with a draw solution concentration of 2.0 M is used in the test. It shows that the membrane prepared using the novel method showed excellent FO performance, which has high potential in industrial applications such as desalination.
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Affiliation(s)
- Chi-feng Lin
- Department
of Materials Science and Engineering, National
Tsing Hua University, Hsinchu 300, Taiwan, Republic of China
| | - Li-han Chung
- Material
and Chemical Research Laboratories, Industrial
Technology Research Institute, Hsinchu 300, Taiwan, Republic of China
| | - Guan-you Lin
- Material
and Chemical Research Laboratories, Industrial
Technology Research Institute, Hsinchu 300, Taiwan, Republic of China
| | - Min-Chao Chang
- Material
and Chemical Research Laboratories, Industrial
Technology Research Institute, Hsinchu 300, Taiwan, Republic of China
| | - Chi-Young Lee
- Department
of Materials Science and Engineering, National
Tsing Hua University, Hsinchu 300, Taiwan, Republic of China
| | - Nyan-Hwa Tai
- Department
of Materials Science and Engineering, National
Tsing Hua University, Hsinchu 300, Taiwan, Republic of China
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Abstract
Graphene oxide is a rising star among 2D materials, yet its interaction with liquid water remains a fundamentally open question: experimental characterization at the atomic scale is difficult, and modeling by classical approaches cannot properly describe chemical reactivity. Here, we bridge the gap between simple computational models and complex experimental systems, by realistic first-principles molecular simulations of graphene oxide (GO) in liquid water. We construct chemically accurate GO models and study their behavior in water, showing that oxygen-bearing functional groups (hydroxyl and epoxides) are preferentially clustered on the graphene oxide layer. We demonstrated the specific properties of GO in water, an unusual combination of both hydrophilicity and fast water dynamics. Finally, we evidence that GO is chemically active in water, acquiring an average negative charge of the order of 10 mC m-2. The ab initio modeling highlights the uniqueness of GO structures for applications as innovative membranes for desalination and water purification.
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Affiliation(s)
- Félix Mouhat
- PASTEUR, Département de Chimie, École Normale Supérieure, PSL University, Sorbonne Université, CNRS, 24 Rue Lhomond 75005, Paris, France
| | - François-Xavier Coudert
- Chimie ParisTech, PSL University, CNRS, Institut de Recherche de Chimie Paris, 75005, Paris, France
| | - Marie-Laure Bocquet
- PASTEUR, Département de Chimie, École Normale Supérieure, PSL University, Sorbonne Université, CNRS, 24 Rue Lhomond 75005, Paris, France.
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Zhu Z, Yang P, Li X, Luo M, Zhang W, Chen M, Zhou X. Green preparation of palm powder-derived carbon dots co-doped with sulfur/chlorine and their application in visible-light photocatalysis. Spectrochim Acta A Mol Biomol Spectrosc 2020; 227:117659. [PMID: 31703996 DOI: 10.1016/j.saa.2019.117659] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2019] [Revised: 10/12/2019] [Accepted: 10/14/2019] [Indexed: 06/10/2023]
Abstract
To exploit photocatalytic performance is one of the worthiest efforts for expanding the application of carbon dots (CDs) owing to their low-cost starting materials, facile preparation and simple operation without secondary pollution. Herein, novel biomass-based CDs (Bio-CDs) were successfully synthesized from waste palm powders by using one-step hydrothermal method under the facilitation of thionyl chloride on carbonization process and doping effect. The resultant Bio-CDs exhibited quasi-spherical shape with an average size of 3.54 nm and displayed blue-emissive fluorescence with excitation-dependent behavior. Benefiting from the S and Cl co-doped structure and small size effect, the synthesized Bio-CDs possessed high photocatalytic activity towards the degradation of organic dyes under visible light. The degradation of the Rhodamine B was nearly 71.7%, while the Methylene Blue was almost decomposed completely (ca. 94.2%), which make the Bio-CDs to be a hopeful candidate as photocatalyst for the reduction of organic pollutants.
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Affiliation(s)
- Ziqi Zhu
- College of Materials Science and Engineering, Nanjing Forestry University, Nanjing, 210037, China
| | - Pei Yang
- College of Materials Science and Engineering, Nanjing Forestry University, Nanjing, 210037, China
| | - Xinghui Li
- College of Materials Science and Engineering, Nanjing Forestry University, Nanjing, 210037, China
| | - Min Luo
- College of Materials Science and Engineering, Nanjing Forestry University, Nanjing, 210037, China
| | - Wei Zhang
- College of Materials Science and Engineering, Nanjing Forestry University, Nanjing, 210037, China
| | - Minzhi Chen
- College of Materials Science and Engineering, Nanjing Forestry University, Nanjing, 210037, China.
| | - Xiaoyan Zhou
- College of Materials Science and Engineering, Nanjing Forestry University, Nanjing, 210037, China.
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Yang Y, Zhong D, Liu Y, Meng D, Wang L, Wei N, Ren G, Yan R, Kang Y. Thermal Transport in Graphene Oxide Films: Theoretical Analysis and Molecular Dynamics Simulation. Nanomaterials (Basel) 2020; 10:E285. [PMID: 32046079 DOI: 10.3390/nano10020285] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/10/2019] [Revised: 01/19/2020] [Accepted: 01/20/2020] [Indexed: 11/16/2022]
Abstract
As a derivative material of graphene, graphene oxide films hold great promise in thermal management devices. Based on the theory of Fourier formula, we deduce the analytical formula of the thermal conductivity of graphene oxide films. The interlaminar thermal property of graphene oxide films is studied using molecular dynamics simulation. The effect of vacancy defect on the thermal conductance of the interface is considered. The interfacial heat transfer efficiency of graphene oxide films strengthens with the increasing ratio of the vacancy defect. Based on the theoretical model and simulation results, we put forward an optimization model of the graphene oxide film. The optimal structure has the minimum overlap length and the maximum thermal conductivity. An estimated optimal overlap length for the GO (graphene-oxide) films with degree of oxidation 10% and density of vacancy defect 2% is 0.33 μm. Our results can provide effective guidance to the rationally designed defective microstructures on engineering thermal transport processes.
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Abstract
Graphene is highly flexible and widely used in flexible devices. However, is the oxidized graphene more flexible than graphene? This is still under debate between simulations and experiments. By employing density functional theory calculations, we show that the bending modulus of oxidized graphene is quite tunable by changing the type and coverage of the functional groups, as well as the bending direction. The hydroxyl increases the bending modulus of graphene, but epoxide can degrade the bending modulus in the armchair bending direction, making the oxidized graphene more flexible than graphene. On the other hand, there exists a curvature limit during bending the oxidized graphene, where OH hydrogen bonds start to transform into O-H covalent bonds. Generally, our results demonstrate the effects of the functional groups and bending direction on the flexibility of oxidized graphene, which should be helpful to design graphene-based flexible devices.
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Affiliation(s)
- Lizhao Liu
- School of Mathematical and Physical Sciences, Dalian University of Technology, Panjin 124221, China
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47
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Li C, Zhang S, Ding Z, Zhou H, Wang G, Zhang H. Copper nanocrystals anchored on an O-rich carbonized corn gel for nitrogen electroreduction to ammonia. Inorg Chem Front 2020. [DOI: 10.1039/d0qi00717j] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Copper nanocrystals anchored on an O-rich carbonized corn gel for electrochemical N2 fixation to NH3 with a faradaic efficiency of 25.89% and an NH3 yield rate of 1514 μg h−1 mgCu−1 at −0.3 V versus an RHE in 0.1 M Na2SO4.
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Affiliation(s)
- Chang Li
- Key Laboratory of Materials Physics
- Centre for Environmental and Energy Nanomaterials
- Anhui Key Laboratory of Nanomaterials and Nanotechnology
- CAS Center for Excellence in Nanoscience
- Institute of Solid State Physics
| | - Shengbo Zhang
- Key Laboratory of Materials Physics
- Centre for Environmental and Energy Nanomaterials
- Anhui Key Laboratory of Nanomaterials and Nanotechnology
- CAS Center for Excellence in Nanoscience
- Institute of Solid State Physics
| | - Zhenhua Ding
- Anhui Institute of Product Quality Supervision and Inspection
- Hefei 230051
- China
| | - Hongjian Zhou
- Key Laboratory of Materials Physics
- Centre for Environmental and Energy Nanomaterials
- Anhui Key Laboratory of Nanomaterials and Nanotechnology
- CAS Center for Excellence in Nanoscience
- Institute of Solid State Physics
| | - Guozhong Wang
- Key Laboratory of Materials Physics
- Centre for Environmental and Energy Nanomaterials
- Anhui Key Laboratory of Nanomaterials and Nanotechnology
- CAS Center for Excellence in Nanoscience
- Institute of Solid State Physics
| | - Haimin Zhang
- Key Laboratory of Materials Physics
- Centre for Environmental and Energy Nanomaterials
- Anhui Key Laboratory of Nanomaterials and Nanotechnology
- CAS Center for Excellence in Nanoscience
- Institute of Solid State Physics
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Zhang Y, Xiao J, Zhuo P, Yin H, Fan Y, Liu X, Chen Z. Carbon Dots Exhibiting Concentration-Dependent Full-Visible-Spectrum Emission for Light-Emitting Diode Applications. ACS Appl Mater Interfaces 2019; 11:46054-46061. [PMID: 31718129 DOI: 10.1021/acsami.9b14472] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [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
Carbon dots (CDs) that exhibit emission over the whole visible spectrum are desired for use in light-emitting diodes (LEDs). Here, CDs displaying tunable fluorescence over the whole visible region are synthesized. Different concentrations of CDs are uniformly dispersed in epoxy resin and coated on 405 nm LED chips to obtain monochrome blue, cyan, green, yellow, red, and deep red LEDs that yield a color gamut covering 99.4% of the National Television Standards Committee (NTSC) standard. These monochrome LEDs display similar high stability. Furthermore, warm and neutral white LEDs are produced by coating cyan- and red-emitting CD layers on 405 nm LED chips, achieving color-rendering indexes (CRIs) of 96.4 and 96.6, respectively. Two fluorescent conversion layers derived from one material at different concentrations simplify the preparation of high-CRI white LEDs. The uniform weak changes of the cyan and red photoluminescence peaks during operation ensure the high stability of these CD-based white LEDs. This research provides a new avenue to develop low-cost, easy-to-prepare CDs with tunable emission colors as alternative phosphors for LED-based high-performance displays and lighting.
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Affiliation(s)
- Yongqiang Zhang
- Guangdong Provincial Engineering Research Center of Crystal and Laser Technology , Guangzhou 510632 , China
- Department of Optoelectronic Engineering , Jinan University , Guangzhou 510632 , China
| | - Junhao Xiao
- Guangdong Provincial Engineering Research Center of Crystal and Laser Technology , Guangzhou 510632 , China
- Department of Optoelectronic Engineering , Jinan University , Guangzhou 510632 , China
| | - Peng Zhuo
- Guangdong Provincial Engineering Research Center of Crystal and Laser Technology , Guangzhou 510632 , China
- Department of Optoelectronic Engineering , Jinan University , Guangzhou 510632 , China
| | - Hao Yin
- Guangdong Provincial Engineering Research Center of Crystal and Laser Technology , Guangzhou 510632 , China
- Department of Optoelectronic Engineering , Jinan University , Guangzhou 510632 , China
| | - Yi Fan
- State Key Laboratory of Luminescence and Applications, Changchun Institute of Optics, Fine Mechanics, and Physics , Chinese Academy of Sciences , Changchun 130033 , China
| | - Xingyuan Liu
- State Key Laboratory of Luminescence and Applications, Changchun Institute of Optics, Fine Mechanics, and Physics , Chinese Academy of Sciences , Changchun 130033 , China
| | - Zhenqiang Chen
- Guangdong Provincial Engineering Research Center of Crystal and Laser Technology , Guangzhou 510632 , China
- Department of Optoelectronic Engineering , Jinan University , Guangzhou 510632 , China
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49
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Zhu GL, Ye XJ, Liu CS. Graphether: a two-dimensional oxocarbon as a direct wide-band-gap semiconductor with high mechanical and electrical performances. Nanoscale 2019; 11:22482-22492. [PMID: 31746895 DOI: 10.1039/c9nr08071f] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Although many graphene derivatives have sizable band gaps, their electrical or mechanical properties are significantly degraded due to the low degree of π-conjugation. Besides the π-π conjugation, there exist hyperconjugative interactions arising from the delocalization of σ electrons. Inspired by the structural characteristics of a hyperconjugated molecule, dimethyl ether, we design a two-dimensional oxocarbon (named graphether) by the assembly of dimethyl ether molecules. Our first-principles calculations reveal the following findings: (1) monolayer graphether possesses excellent dynamic and thermal stabilities as demonstrated by its favourable cohesive energy, the absence of soft phonon modes, and high melting point. (2) It has a direct wide-band-gap energy of 2.39 eV, indicating its potential applications in ultraviolet optoelectronic devices. Interestingly, the direct band gap feature is rather robust against the external strains (-10% to 10%) and stacking configurations. (3) Due to the hyperconjugative effect, graphether has the high intrinsic electron mobility. More importantly, its in-plane stiffness (459.8 N m-1) is even larger than that of graphene. (4) The Pt(100) surface exhibits high catalytic activity for the dehydrogenation of dimethyl ether. The electrostatic repulsion serves as a driving force for the rotation and coalescence of two dehydrogenated precursors, which is favourable for the bottom-up growth of graphether. (5) Replacement of the C-C bond with an isoelectronic B-N bond can generate a stable Pmn21-BNO monolayer. Compared with monolayer hexagonal boron nitride, Pmn21-BNO has a moderate direct band gap energy (3.32 eV) and better mechanical property along the armchair direction.
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Affiliation(s)
- Gui-Lin Zhu
- Key Laboratory of Radio Frequency and Micro-Nano Electronics of Jiangsu Province, College of Electronic and Optical Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210023, China.
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Affiliation(s)
- Iann C. Gerber
- LPCNO, Université de Toulouse, CNRS, INSA, UPS, 135 avenue de Rangueil, F-31077 Toulouse, France
| | - Philippe Serp
- LCC-CNRS, Université de Toulouse, UPR 8241 CNRS, INPT, 31400 Toulouse, France
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