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Yue Y, Zhang D, Wang P, Xia X, Wu X, Zhang Y, Mei J, Li S, Li M, Wang Y, Zhang X, Wei X, Liu H, Zhou W. Large-Area Flexible Carbon Nanofilms with Synergistically Enhanced Transmittance and Conductivity Prepared by Reorganizing Single-Walled Carbon Nanotube Networks. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024:e2313971. [PMID: 38573651 DOI: 10.1002/adma.202313971] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2023] [Revised: 03/23/2024] [Indexed: 04/05/2024]
Abstract
Large-area flexible transparent conductive films (TCFs) are highly desired for future electronic devices. Nanocarbon TCFs are one of the most promising candidates, but some of their properties are mutually restricted. Here, a novel carbon nanotube network reorganization (CNNR) strategy, that is, the facet-driven CNNR (FD-CNNR) technique, is presented to overcome this intractable contradiction. The FD-CNNR technique introduces an interaction between single-walled carbon nanotube (SWNT) and Cu─-O. Based on the unique FD-CNNR mechanism, large-area flexible reorganized carbon nanofilms (RNC-TCFs) are designed and fabricated with A3-size and even meter-length, including reorganized SWNT (RSWNT) films and graphene and RSWNT (G-RSWNT) hybrid films. Synergistic improvement in strength, transmittance, and conductivity of flexible RNC-TCFs is achieved. The G-RSWNT TCF shows sheet resistance as low as 69 Ω sq-1 at 86% transmittance, FOM value of 35, and Young's modulus of ≈45 MPa. The high strength enables RNC-TCFs to be freestanding on water and easily transferred to any target substrate without contamination. A4-size flexible smart window is fabricated, which manifests controllable dimming and fog removal. The FD-CNNR technique can be extended to large-area or even large-scale fabrication of TCFs and can provide new insights into the design of TCFs and other functional films.
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Affiliation(s)
- Ying Yue
- Beijing National Laboratory for Condensed Matter Physics, and Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China
- School of Physical Sciences and College of Materials Science and Optoelectronic Technology, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Di Zhang
- Beijing National Laboratory for Condensed Matter Physics, and Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China
- School of Physical Sciences and College of Materials Science and Optoelectronic Technology, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Pengyu Wang
- Beijing National Laboratory for Condensed Matter Physics, and Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China
- School of Physical Sciences and College of Materials Science and Optoelectronic Technology, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Xiaogang Xia
- Beijing National Laboratory for Condensed Matter Physics, and Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China
- School of Physical Sciences and College of Materials Science and Optoelectronic Technology, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Xin Wu
- Beijing National Laboratory for Condensed Matter Physics, and Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China
- School of Physical Sciences and College of Materials Science and Optoelectronic Technology, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Yuejuan Zhang
- Beijing National Laboratory for Condensed Matter Physics, and Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China
- School of Physical Sciences and College of Materials Science and Optoelectronic Technology, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Jie Mei
- Beijing National Laboratory for Condensed Matter Physics, and Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China
- School of Physical Sciences and College of Materials Science and Optoelectronic Technology, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Shaoqing Li
- Beijing National Laboratory for Condensed Matter Physics, and Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China
- School of Physical Sciences and College of Materials Science and Optoelectronic Technology, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Mingming Li
- Beijing National Laboratory for Condensed Matter Physics, and Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China
- School of Physical Sciences and College of Materials Science and Optoelectronic Technology, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Yanchun Wang
- Beijing National Laboratory for Condensed Matter Physics, and Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China
- Beijing Key Laboratory for Advanced Functional Materials and Structure Research, Beijing, 100190, China
| | - Xiao Zhang
- Beijing National Laboratory for Condensed Matter Physics, and Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China
- School of Physical Sciences and College of Materials Science and Optoelectronic Technology, University of Chinese Academy of Sciences, Beijing, 100049, China
- Beijing Key Laboratory for Advanced Functional Materials and Structure Research, Beijing, 100190, China
- Songshan Materials Laboratory, Dongguan, Guangdong, 523808, China
| | - Xiaojun Wei
- Beijing National Laboratory for Condensed Matter Physics, and Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China
- School of Physical Sciences and College of Materials Science and Optoelectronic Technology, University of Chinese Academy of Sciences, Beijing, 100049, China
- Beijing Key Laboratory for Advanced Functional Materials and Structure Research, Beijing, 100190, China
- Songshan Materials Laboratory, Dongguan, Guangdong, 523808, China
| | - Huaping Liu
- Beijing National Laboratory for Condensed Matter Physics, and Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China
- School of Physical Sciences and College of Materials Science and Optoelectronic Technology, University of Chinese Academy of Sciences, Beijing, 100049, China
- Beijing Key Laboratory for Advanced Functional Materials and Structure Research, Beijing, 100190, China
- Songshan Materials Laboratory, Dongguan, Guangdong, 523808, China
| | - Weiya Zhou
- Beijing National Laboratory for Condensed Matter Physics, and Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China
- School of Physical Sciences and College of Materials Science and Optoelectronic Technology, University of Chinese Academy of Sciences, Beijing, 100049, China
- Beijing Key Laboratory for Advanced Functional Materials and Structure Research, Beijing, 100190, China
- Songshan Materials Laboratory, Dongguan, Guangdong, 523808, China
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Hu XG, Zhao YM, Yang H, Hou PX, Liu C, Chang J, Hao Y. Interfacial Chemical Bridging Constructed by Multifunctional Lewis Acid for Carbon Nanotube/Silicon Heterojunction Solar Cells with an Efficiency Approaching 17.7. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2023; 10:e2206989. [PMID: 36815396 PMCID: PMC10161097 DOI: 10.1002/advs.202206989] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Revised: 01/31/2023] [Indexed: 05/06/2023]
Abstract
Single-wall carbon nanotube/silicon (SWCNT/Si) heterojunction shows appealing potential for use in photovoltaic devices. However, the relatively low conductivity of SWCNT network and interfacial recombination of carriers have limited their photovoltaic performance. Herein, a multifunctional Lewis acid (p-toluenesulfonic acid, TsOH) is used to significantly reduce the energy loss in SWCNT/Si solar cells. Owing to the charge transfer doping effect of TsOH, the conductivity and work function of SWCNT films are optimized and tuned. More importantly, a chemical bridge is constructed at the interface of SWCNT/Si heterojunction. Experimental studies indicate that the phenyl group of TsOH can interact with SWCNTs through π-π interaction, meanwhile, the oxygen in the sulfonic functional group of the TsOH molecule can graft on the dangling bonds of the Si surface. The chemical bridge structure effectively suppresses the recombination of photogenerated carriers. The TsOH coating also works as an antireflection layer, leading to a 19% increment of the photocurrent. As a result, a champion power conversion efficiency of 17.7% is achieved for the TsOH-SWCNT/Si device, and it also exhibits an excellent stability, retaining more than 96% of the initial efficiency in the ambient air after 1 month.
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Affiliation(s)
- Xian-Gang Hu
- Advanced Interdisciplinary Research Center for Flexible Electronics, Academy of Advanced Interdisciplinary Research, Xidian University, Xi'an, 710071, China
| | - Yi-Ming Zhao
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, China
| | - Hongyu Yang
- Advanced Interdisciplinary Research Center for Flexible Electronics, Academy of Advanced Interdisciplinary Research, Xidian University, Xi'an, 710071, China
| | - Peng-Xiang Hou
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, China
| | - Chang Liu
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, China
| | - Jingjing Chang
- Advanced Interdisciplinary Research Center for Flexible Electronics, Academy of Advanced Interdisciplinary Research, Xidian University, Xi'an, 710071, China
- State Key Discipline Laboratory of Wide Band Gap Semiconductor Technology, School of Microelectronics, Xidian University, Xi'an, 710071, China
| | - Yue Hao
- Advanced Interdisciplinary Research Center for Flexible Electronics, Academy of Advanced Interdisciplinary Research, Xidian University, Xi'an, 710071, China
- State Key Discipline Laboratory of Wide Band Gap Semiconductor Technology, School of Microelectronics, Xidian University, Xi'an, 710071, China
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3
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Xu T, Jiang J. On the configuration of the graphene/carbon nanotube/graphene van der Waals heterostructure. Phys Chem Chem Phys 2023; 25:5066-5072. [PMID: 36723006 DOI: 10.1039/d2cp04797g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The graphene/carbon nanotube/graphene (GCG) van der Waals heterostructure is a promising candidate for application in electronics and optical devices, for which the configuration and mechanical properties are of great importance. We perform molecular dynamics simulations to investigate the configuration of the GCG structure, which is successfully interpreted by the mechanic model based on the competition between the bending energy and the adhesion energy. It is found that the cross-section of the nanotube is compressed into an ellipse by the graphene layers, and the eccentricity increases with the increase of the nanotube's diameter. We obtain a concise expression for the relationship between the eccentricity and the nanotube's diameter. These findings shall be valuable for further studies on the physical and mechanical properties of the GCG structure.
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Affiliation(s)
- Tianyan Xu
- Shanghai Key Laboratory of Mechanics in Energy Engineering, Shanghai Institute of Applied Mathematics and Mechanics, Shanghai Frontier Science Center of Mechanoinformatics, School of Mechanics and Engineering Science, Shanghai University, Shanghai 200072, People's Republic of China.
| | - Jinwu Jiang
- Shanghai Key Laboratory of Mechanics in Energy Engineering, Shanghai Institute of Applied Mathematics and Mechanics, Shanghai Frontier Science Center of Mechanoinformatics, School of Mechanics and Engineering Science, Shanghai University, Shanghai 200072, People's Republic of China.
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Wei X, Li S, Wang W, Zhang X, Zhou W, Xie S, Liu H. Recent Advances in Structure Separation of Single-Wall Carbon Nanotubes and Their Application in Optics, Electronics, and Optoelectronics. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2022; 9:e2200054. [PMID: 35293698 PMCID: PMC9108629 DOI: 10.1002/advs.202200054] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2022] [Revised: 02/10/2022] [Indexed: 05/04/2023]
Abstract
Structural control of single-wall carbon nanotubes (SWCNTs) with uniform properties is critical not only for their property modulation and functional design but also for applications in electronics, optics, and optoelectronics. To achieve this goal, various separation techniques have been developed in the past 20 years through which separation of high-purity semiconducting/metallic SWCNTs, single-chirality species, and even their enantiomers have been achieved. This progress has promoted the property modulation of SWCNTs and the development of SWCNT-based optoelectronic devices. Here, the recent advances in the structure separation of SWCNTs are reviewed, from metallic/semiconducting SWCNTs, to single-chirality species, and to enantiomers by several typical separation techniques and the application of the corresponding sorted SWCNTs. Based on the separation procedure, efficiency, and scalability, as well as, the separable SWCNT species, purity, and quantity, the advantages and disadvantages of various separation techniques are compared. Combined with the requirements of SWCNT application, the challenges, prospects, and development direction of structure separation are further discussed.
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Affiliation(s)
- Xiaojun Wei
- Beijing National Laboratory for Condensed Matter PhysicsInstitute of PhysicsChinese Academy of SciencesBeijing100190China
- Center of Materials Science and Optoelectronics Engineeringand School of Physical SciencesUniversity of Chinese Academy of SciencesBeijing100049China
- Beijing Key Laboratory for Advanced Functional Materials and Structure ResearchBeijing100190China
- Songshan Lake Materials LaboratoryDongguanGuangdong523808China
| | - Shilong Li
- Beijing National Laboratory for Condensed Matter PhysicsInstitute of PhysicsChinese Academy of SciencesBeijing100190China
- Beijing Key Laboratory for Advanced Functional Materials and Structure ResearchBeijing100190China
| | - Wenke Wang
- Beijing National Laboratory for Condensed Matter PhysicsInstitute of PhysicsChinese Academy of SciencesBeijing100190China
- Center of Materials Science and Optoelectronics Engineeringand School of Physical SciencesUniversity of Chinese Academy of SciencesBeijing100049China
- Beijing Key Laboratory for Advanced Functional Materials and Structure ResearchBeijing100190China
| | - Xiao Zhang
- Beijing National Laboratory for Condensed Matter PhysicsInstitute of PhysicsChinese Academy of SciencesBeijing100190China
- Center of Materials Science and Optoelectronics Engineeringand School of Physical SciencesUniversity of Chinese Academy of SciencesBeijing100049China
- Beijing Key Laboratory for Advanced Functional Materials and Structure ResearchBeijing100190China
- Songshan Lake Materials LaboratoryDongguanGuangdong523808China
| | - Weiya Zhou
- Beijing National Laboratory for Condensed Matter PhysicsInstitute of PhysicsChinese Academy of SciencesBeijing100190China
- Center of Materials Science and Optoelectronics Engineeringand School of Physical SciencesUniversity of Chinese Academy of SciencesBeijing100049China
- Beijing Key Laboratory for Advanced Functional Materials and Structure ResearchBeijing100190China
- Songshan Lake Materials LaboratoryDongguanGuangdong523808China
| | - Sishen Xie
- Beijing National Laboratory for Condensed Matter PhysicsInstitute of PhysicsChinese Academy of SciencesBeijing100190China
- Center of Materials Science and Optoelectronics Engineeringand School of Physical SciencesUniversity of Chinese Academy of SciencesBeijing100049China
- Beijing Key Laboratory for Advanced Functional Materials and Structure ResearchBeijing100190China
- Songshan Lake Materials LaboratoryDongguanGuangdong523808China
| | - Huaping Liu
- Beijing National Laboratory for Condensed Matter PhysicsInstitute of PhysicsChinese Academy of SciencesBeijing100190China
- Center of Materials Science and Optoelectronics Engineeringand School of Physical SciencesUniversity of Chinese Academy of SciencesBeijing100049China
- Beijing Key Laboratory for Advanced Functional Materials and Structure ResearchBeijing100190China
- Songshan Lake Materials LaboratoryDongguanGuangdong523808China
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5
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Srivastava J, Gaur A. A tight-binding study of the electron transport through single-walled carbon nanotube-graphene hybrid nanostructures. J Chem Phys 2021; 155:244104. [PMID: 34972369 DOI: 10.1063/5.0077099] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Hybrid carbon nanostructures based on the sp2 hybridized allotropes of carbon, such as graphene and single-walled carbon nanotubes (SWCNTs), hold vast potential for applications in electronics of various forms. Electronic properties of such hybrid structures are modified due to the interaction between atoms of the components, which can be utilized to tailor the properties of the hybrid structures to suite the application. In this study, we have explored charge (electron) transport through the hybrid structures of single-layer graphene (SLG) and SWCNTs (both metallic and semiconducting) using the nonequilibrium Green's function formalism within the framework of tight-binding density functional theory. Our calculations show that the electronic transport in hybrid nanostructures is affected by the interactions between SWCNT and SLG in comparison to the individual components. The changes in the electronic structure and the transport properties with increasing interaction in hybrids (captured by decreasing the separation between SWCNT and SLG) are discussed, and it is demonstrated from this analysis that the hybrids with semiconducting SWCNTs and metallic SWCNTs show different behavior in the low bias regime while they show similar behavior at higher biases. The difference in the transport properties of hybrids with semiconducting and metallic SWCNTs is explained in terms of changes in the electronic structure, the local density of states, and the energy dispersion for electrons due to the interaction between atoms of the two components.
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Affiliation(s)
- Juhi Srivastava
- Department of Materials Science and Engineering, Indian Institute of Technology Kanpur, Kanpur 208016, UP, India and Samtel Centre for Display Technologies, Indian Institute of Technology Kanpur, Kanpur 208016, UP, India
| | - Anshu Gaur
- Department of Materials Science and Engineering, Indian Institute of Technology Kanpur, Kanpur 208016, UP, India and Samtel Centre for Display Technologies, Indian Institute of Technology Kanpur, Kanpur 208016, UP, India
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6
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Abstract
Carbon nanotubes (CNTs), graphene aerogels (GAs), and their hybrid (CNT-GA) prepared by hydrothermal treatment were tested in the electrocatalytic oxygen reduction reaction (ORR). The importance of porous structure derived from the combination of mesoporosity coming from CNTs with macroporosity stemming from GAs was evidenced because the hybrid carbon material exhibited synergistic performance in terms of kinetic current and onset potential. Different electrocatalysts were prepared based on these hybrids doped with nitrogen using different precursors and also supporting Fe nanoparticles. N-doped carbon hybrids showed higher electrocatalytic activity than their undoped counterparts. Nevertheless, both doped and undoped materials provided a mixed two and four electron reduction. On the other hand, the addition of a Fe precursor and phenanthroline to the CNT-GA allowed preparing an N-doped hybrid containing Fe nanoparticles which favored the 4-electron oxygen reduction to water, thus being an excellent candidate as a structured cathode in fuel cells.
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Hybrid Films Based on Bilayer Graphene and Single-Walled Carbon Nanotubes: Simulation of Atomic Structure and Study of Electrically Conductive Properties. NANOMATERIALS 2021; 11:nano11081934. [PMID: 34443764 PMCID: PMC8400045 DOI: 10.3390/nano11081934] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Revised: 07/23/2021] [Accepted: 07/24/2021] [Indexed: 12/27/2022]
Abstract
One of the urgent problems of materials science is the search for the optimal combination of graphene modifications and carbon nanotubes (CNTs) for the formation of layered hybrid material with specified physical properties. High electrical conductivity and stability are one of the main optimality criteria for a graphene/CNT hybrid structure. This paper presents results of a theoretical and computational study of the peculiarities of the atomic structure and the regularities of current flow in hybrid films based on single-walled carbon nanotubes (SWCNTs) with a diameter of 1.2 nm and bilayer zigzag graphene nanoribbons, where the layers are shifted relative to the other. It is found that the maximum stresses on atoms of hybrid film do not exceed ~0.46 GPa for all considered topological models. It is shown that the electrical conductivity anisotropy takes place in graphene/SWCNT hybrid films at a graphene nanoribbon width of 4 hexagons. In the direction along the extended edge of the graphene nanoribbon, the electrical resistance of graphene/SWCNT hybrid film reaches ~125 kOhm; in the direction along the nanotube axis, the electrical resistance is about 16 kOhm. The prospects for the use of graphene/SWCNT hybrid films in electronics are predicted based on the obtained results.
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8
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Srivastava J, Gaur A. Tight-binding investigation of the structural and vibrational properties of graphene-single wall carbon nanotube junctions. NANOSCALE ADVANCES 2021; 3:2030-2038. [PMID: 36133080 PMCID: PMC9418026 DOI: 10.1039/d0na00881h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Accepted: 02/05/2021] [Indexed: 06/16/2023]
Abstract
Hybrid carbon nanostructures based on single walled carbon nanotubes (SWNTs) and single layer graphene (SLG) have drawn much attention lately for their applications in a range of efficient hybrid devices. A few recent studies, addressing the interaction behavior at the heterojunction, considered charge transfer between the constituents (SWNTs and SLG) to be responsible for changes in the electronic and vibrational properties of their hybrid system. We report the effect of various factors, arising due to the interactions between the atoms of SWNTs and SLG, on the structural and vibrational properties of hybrid nanostructures investigated computationally within the framework of tight-binding DFT. These factors, such as the van der Waals (vdW) forces, structural deformation and charge transfer, are seen to affect the Raman active phonon frequencies of SWNTs and SLG in the hybrid nanostructure. These factors are already known to affect the vibrational properties of SWNTs and SLG separately and in this work, we have explored their role and interplay between these factors in hybrid systems. The contribution of different factors to the total shift observed in phonon frequencies is estimated and it is perceived from our findings that not only the charge transfer but the structural deformations and the vdW forces also affect the vibrational properties of components within the hybrid, with structural deformation being the leading factor. With decreasing separation between SWNTs and SLG, the charge transfer and the vdW forces both increase. However, the increase in vdW forces is relatively much higher and likely to be the main cause for larger Raman shifts observed at smaller separations.
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Affiliation(s)
- Juhi Srivastava
- Department of Materials Science and Engineering, Indian Institute of Technology Kanpur Kanpur 208016 Uttar Pradesh India
- Samtel Centre for Display Technologies, Indian Institute of Technology Kanpur Kanpur 208016 Uttar Pradesh India
| | - Anshu Gaur
- Department of Materials Science and Engineering, Indian Institute of Technology Kanpur Kanpur 208016 Uttar Pradesh India
- Samtel Centre for Display Technologies, Indian Institute of Technology Kanpur Kanpur 208016 Uttar Pradesh India
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9
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Limani N, Boudet A, Blanchard N, Jousselme B, Cornut R. Local probe investigation of electrocatalytic activity. Chem Sci 2020; 12:71-98. [PMID: 34163583 PMCID: PMC8178752 DOI: 10.1039/d0sc04319b] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2020] [Accepted: 11/04/2020] [Indexed: 11/21/2022] Open
Abstract
As the world energy crisis remains a long-term challenge, development and access to renewable energy sources are crucial for a sustainable modern society. Electrochemical energy conversion devices are a promising option for green energy supply, although the challenge associated with electrocatalysis have caused increasing complexity in the materials and systems, demanding further research and insights. In this field, scanning probe microscopy (SPM) represents a specific source of knowledge and understanding. Thus, our aim is to present recent findings on electrocatalysts for electrolysers and fuel cells, acquired mainly through scanning electrochemical microscopy (SECM) and other related scanning probe techniques. This review begins with an introduction to the principles of several SPM techniques and then proceeds to the research done on various energy-related reactions, by emphasizing the progress on non-noble electrocatalytic materials.
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Affiliation(s)
- N Limani
- Université Paris-Saclay, CEA, CNRS, NIMBE, LICSEN Gif-sur-Yvette 91191 France
| | - A Boudet
- Université Paris-Saclay, CEA, CNRS, NIMBE, LICSEN Gif-sur-Yvette 91191 France
| | - N Blanchard
- Université Paris-Saclay, CEA, CNRS, NIMBE, LICSEN Gif-sur-Yvette 91191 France
| | - B Jousselme
- Université Paris-Saclay, CEA, CNRS, NIMBE, LICSEN Gif-sur-Yvette 91191 France
| | - R Cornut
- Université Paris-Saclay, CEA, CNRS, NIMBE, LICSEN Gif-sur-Yvette 91191 France
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Kolosov DA, Mitrofanov VV, Slepchenkov MM, Glukhova OE. Thin Graphene-Nanotube Films for Electronic and Photovoltaic Devices: DFTB Modeling. MEMBRANES 2020; 10:membranes10110341. [PMID: 33202838 PMCID: PMC7698213 DOI: 10.3390/membranes10110341] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/22/2020] [Revised: 10/21/2020] [Accepted: 11/11/2020] [Indexed: 06/11/2023]
Abstract
Supercell atomic models of composite films on the basis of graphene and single-wall carbon nanotubes (SWCNTs) with an irregular arrangement of SWCNTs were built. It is revealed that composite films of this type have a semiconducting type of conductivity and are characterized by the presence of an energy gap of 0.43-0.73 eV. It was found that the absorption spectrum of composite films contained specific peaks in a wide range of visible and infrared (IR) wavelengths. On the basis of calculated composite films volt-ampere characteristics (VAC), the dependence of the current flowing through the films on the distance between the nanotubes was identified. For the investigated composites, spectral dependences of the photocurrent were calculated. It was shown that depending on the distance between nanotubes, the maximum photocurrent might shift from the IR to the optical range.
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Affiliation(s)
- Dmitry A. Kolosov
- Department of Physics, Saratov State University, Astrakhanskaya street 83, 410012 Saratov, Russia; (D.A.K.); (V.V.M.); (M.M.S.)
| | - Vadim V. Mitrofanov
- Department of Physics, Saratov State University, Astrakhanskaya street 83, 410012 Saratov, Russia; (D.A.K.); (V.V.M.); (M.M.S.)
| | - Michael M. Slepchenkov
- Department of Physics, Saratov State University, Astrakhanskaya street 83, 410012 Saratov, Russia; (D.A.K.); (V.V.M.); (M.M.S.)
| | - Olga E. Glukhova
- Department of Physics, Saratov State University, Astrakhanskaya street 83, 410012 Saratov, Russia; (D.A.K.); (V.V.M.); (M.M.S.)
- Laboratory of Biomedical Nanotechnology, I.M. Sechenov First Moscow State Medical University, Trubetskaya street 8-2, 119991 Moscow, Russia
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11
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Senokos E, Rana M, Vila M, Fernandez-Cestau J, Costa RD, Marcilla R, Vilatela JJ. Transparent and flexible high-power supercapacitors based on carbon nanotube fibre aerogels. NANOSCALE 2020; 12:16980-16986. [PMID: 32780058 DOI: 10.1039/d0nr04646a] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
In this work, we report the fabrication of continuous transparent and flexible supercapacitors by depositing a CNT network onto a polymer electrolyte membrane directly from an aerogel of ultra-long CNTs produced floating in the gas phase. The supercapacitors show a combination of a power density of 1370 kW kg-1 at high transmittance (ca. 70%), and high electrochemical stability during extended cycling (>94% capacitance retention over 20 000 cycles) and against repeated 180° flexural deformation. They represent a significant enhancement of 1-3 orders of magnitude compared to prior state-of-the-art transparent supercapacitors based on graphene, CNTs, and rGO. These features mainly arise from the exceptionally long length of CNTs, which makes the material behave as a bulk conductor instead of an aspect ratio-limited percolating network, even for electrodes with >90% transparency. The electrical and capacitive figures-of-merit for the transparent conductor are FoMe = 2.7, and FoMc = 0.46 F S-1 cm-2 respectively.
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Affiliation(s)
- Evgeny Senokos
- IMDEA Materials Institute, C/Eric Kandel, 2, Getafe, 28906, Madrid, Spain. and Electrochemical Processes Unit, IMDEA Energy, Avda. Ramón de la Sagra, 3, 28937 Móstoles, Madrid, Spain.
| | - Moumita Rana
- IMDEA Materials Institute, C/Eric Kandel, 2, Getafe, 28906, Madrid, Spain.
| | - Maria Vila
- IMDEA Materials Institute, C/Eric Kandel, 2, Getafe, 28906, Madrid, Spain.
| | | | - Rubén D Costa
- IMDEA Materials Institute, C/Eric Kandel, 2, Getafe, 28906, Madrid, Spain.
| | - Rebeca Marcilla
- Electrochemical Processes Unit, IMDEA Energy, Avda. Ramón de la Sagra, 3, 28937 Móstoles, Madrid, Spain.
| | - Juan Jose Vilatela
- IMDEA Materials Institute, C/Eric Kandel, 2, Getafe, 28906, Madrid, Spain.
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Tavakkoli M, Flahaut E, Peljo P, Sainio J, Davodi F, Lobiak EV, Mustonen K, Kauppinen EI. Mesoporous Single-Atom-Doped Graphene–Carbon Nanotube Hybrid: Synthesis and Tunable Electrocatalytic Activity for Oxygen Evolution and Reduction Reactions. ACS Catal 2020. [DOI: 10.1021/acscatal.0c00352] [Citation(s) in RCA: 71] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Mohammad Tavakkoli
- Department of Applied Physics, Aalto University School of Science, P.O. Box 15100, FI-00076 Aalto, Finland
| | - Emmanuel Flahaut
- CIRIMAT, Université de Toulouse, CNRS, INPT, UPS, UMR CNRS-UPS-INP No 5085, Université Toulouse 3 Paul Sabatier, Bât. CIRIMAT, 118, route de Narbonne, 31062 Toulouse cedex 9, France
| | - Pekka Peljo
- Research Group of Physical Electrochemistry and Electrochemical Physics, Department of Chemistry and Material Sciences, Aalto University School of Chemical Engineering, P.O. Box 16100, FI-00076 Aalto, Finland
| | - Jani Sainio
- Department of Applied Physics, Aalto University School of Science, P.O. Box 15100, FI-00076 Aalto, Finland
| | - Fatemeh Davodi
- Department of Chemistry and Material Sciences, Aalto University School of Chemical Engineering, P.O. Box 16100, FI-00076 Aalto, Finland
| | - Egor V. Lobiak
- Nikolaev Institute of Inorganic Chemistry, SB RAS, 630090 Novosibirsk, Russia
| | - Kimmo Mustonen
- Faculty of Physics, University of Vienna, 1090 Vienna, Austria
| | - Esko I. Kauppinen
- Department of Applied Physics, Aalto University School of Science, P.O. Box 15100, FI-00076 Aalto, Finland
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