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Kammarchedu V, Asgharian H, Zhou K, Soltan Khamsi P, Ebrahimi A. Recent advances in graphene-based electroanalytical devices for healthcare applications. NANOSCALE 2024; 16:12857-12882. [PMID: 38888429 PMCID: PMC11238565 DOI: 10.1039/d3nr06137j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/20/2024]
Abstract
Graphene, with its outstanding mechanical, electrical, and biocompatible properties, stands out as an emerging nanomaterial for healthcare applications, especially in building electroanalytical biodevices. With the rising prevalence of chronic diseases and infectious diseases, such as the COVID-19 pandemic, the demand for point-of-care testing and remote patient monitoring has never been greater. Owing to their portability, ease of manufacturing, scalability, and rapid and sensitive response, electroanalytical devices excel in these settings for improved healthcare accessibility, especially in resource-limited settings. The development of different synthesis methods yielding large-scale graphene and its derivatives with controllable properties, compatible with device manufacturing - from lithography to various printing methods - and tunable electrical, chemical, and electrochemical properties make it an attractive candidate for electroanalytical devices. This review article sheds light on how graphene-based devices can be transformative in addressing pressing healthcare needs, ranging from the fundamental understanding of biology in in vivo and ex vivo studies to early disease detection and management using in vitro assays and wearable devices. In particular, the article provides a special focus on (i) synthesis and functionalization techniques, emphasizing their suitability for scalable integration into devices, (ii) various transduction methods to design diverse electroanalytical device architectures, (iii) a myriad of applications using devices based on graphene, its derivatives, and hybrids with other nanomaterials, and (iv) emerging technologies at the intersection of device engineering and advanced data analytics. Finally, some of the major hurdles that graphene biodevices face for translation into clinical applications are discussed.
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Affiliation(s)
- Vinay Kammarchedu
- Department of Electrical Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, USA.
- Center for Atomically Thin Multifunctional Coatings, The Pennsylvania State University, University Park, Pennsylvania 16802, USA
- Materials Research Institute, The Pennsylvania State University, University Park, Pennsylvania 16802, USA
| | - Heshmat Asgharian
- Department of Electrical Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, USA.
- Materials Research Institute, The Pennsylvania State University, University Park, Pennsylvania 16802, USA
| | - Keren Zhou
- Department of Electrical Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, USA.
- Materials Research Institute, The Pennsylvania State University, University Park, Pennsylvania 16802, USA
| | - Pouya Soltan Khamsi
- Department of Electrical Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, USA.
- Materials Research Institute, The Pennsylvania State University, University Park, Pennsylvania 16802, USA
| | - Aida Ebrahimi
- Department of Electrical Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, USA.
- Center for Atomically Thin Multifunctional Coatings, The Pennsylvania State University, University Park, Pennsylvania 16802, USA
- Materials Research Institute, The Pennsylvania State University, University Park, Pennsylvania 16802, USA
- Department of Biomedical Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, USA
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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; 36: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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Zhang P, Wang Y, Li P, Luo X, Feng J, Kong H, Li T, Wang W, Duan X, Liu Y, Li M. Improving stability and separation performance of graphene oxide/graphene nanofiltration membranes by adjusting the laminated regularity of stacking-sheets. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 827:154175. [PMID: 35231529 DOI: 10.1016/j.scitotenv.2022.154175] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Revised: 02/14/2022] [Accepted: 02/23/2022] [Indexed: 06/14/2023]
Abstract
The laminated graphene oxide (GO) membranes are promising alternatives in the field of nanofiltration due to their unique stacked interlayer structure and controllable molecular transport channels. However, it is still challenging to obtain satisfactory physical stability and separation performance to meet its practical application. In this study, a novel GO/Gr (graphene) nanofiltration membrane with high stability was engineered by post-hot-pressure treatment, following forward pressure filtration. The impact of GO/Gr loading ratio of the composites nanofiltration membranes for the permeability, selectivity, hydrophilicity and physical stability was investigated. The GO/Gr nanofiltration membranes exhibited high stability and separation performance because of the enhanced regularity and smoothness of the overall stacking layers. It was demonstrated that the satisfactory permeability (12.8-20 L·m-2·h-1) of GO/Gr nanofiltration membranes could be achieved. Compared with the pure GO membranes, GO/Gr-0.5 membranes exhibited a higher Na2SO4, NaCl, MgCl2, and MgSO4 rejection rate of approximately 78.3%, 51.2%, 34.5% and 32.6%, respectively. Meanwhile, the rejection rate (99.5%, 99.9%, 97.3% and 98.6%) of composite membranes for Methylene blue, Congo red, Rhodamine B and Methyl orange could be achieved. This facile way reveals the potential of stacked GO/Gr membranes in developing GO-based nanofiltration membranes.
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Affiliation(s)
- Peng Zhang
- College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science & Technology, WeiYang District, Xi'an 710021, Shaanxi, China; National Demonstration Center for Experimental Light Chemistry Engineering Education, Shaanxi University of Science &Technology, WeiYang District, Xi'an 710021, Shaanxi, China
| | - Yiran Wang
- College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science & Technology, WeiYang District, Xi'an 710021, Shaanxi, China
| | - Pengni Li
- Tongxiang Affairs Center of Quality and Technical Supervision, Tongxiang 314599, Zhejiang, China
| | - Xiaomin Luo
- College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science & Technology, WeiYang District, Xi'an 710021, Shaanxi, China; National Demonstration Center for Experimental Light Chemistry Engineering Education, Shaanxi University of Science &Technology, WeiYang District, Xi'an 710021, Shaanxi, China.
| | - Jianyan Feng
- National Demonstration Center for Experimental Light Chemistry Engineering Education, Shaanxi University of Science &Technology, WeiYang District, Xi'an 710021, Shaanxi, China
| | - Hui Kong
- College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science & Technology, WeiYang District, Xi'an 710021, Shaanxi, China
| | - Ting Li
- College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science & Technology, WeiYang District, Xi'an 710021, Shaanxi, China
| | - Wenqi Wang
- China Leather and Footwear Industry Research Institute (Jinjiang) Co, LTD., Wenhua Road, Jinjiang 362200, Fujian, China
| | - Xubing Duan
- China Leather and Footwear Industry Research Institute (Jinjiang) Co, LTD., Wenhua Road, Jinjiang 362200, Fujian, China
| | - Ying Liu
- College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science & Technology, WeiYang District, Xi'an 710021, Shaanxi, China
| | - Meng Li
- Shaanxi Key Laboratory of Optoelectronic Functional Materials and Devices, School of Materials Science and Chemical Engineering, Xi'an Technological University, Xi'an 710021, PR China.
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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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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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6
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Shahamatifard F, Rodrigue D, Park KW, Frikha S, Mighri F. Natural rubber nanocomposites: effect of carbon black/multi-walled carbon nanotubes hybrid fillers on the mechanical properties and thermal conductivity. POLYM-PLAST TECH MAT 2021. [DOI: 10.1080/25740881.2021.1930044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- F. Shahamatifard
- Research Center for High Performance Polymer and Composite Systems, CREPEC, Quebec, Canada
- Department of Chemical Engineering, Laval University, Quebec, Canada
| | - D. Rodrigue
- Research Center for High Performance Polymer and Composite Systems, CREPEC, Quebec, Canada
- Department of Chemical Engineering, Laval University, Quebec, Canada
| | | | | | - F. Mighri
- Research Center for High Performance Polymer and Composite Systems, CREPEC, Quebec, Canada
- Department of Chemical Engineering, Laval University, Quebec, Canada
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Raza W. Design of Graphene/CNT-based Nanocomposites: A Stepping Stone for Energy-related Applications. ALL-CARBON COMPOSITES AND HYBRIDS 2021. [DOI: 10.1039/9781839162718-00077] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
The regular requirement for excellent, low weight, cost-effective, and durable materials have been the driving force for the investigation of novel materials. The exploration of carbon-based materials such as graphene has gained extensive research consideration due to its outstanding properties. Graphene is the thinnest (2D carbon) material in the universe with high charge carrier mobility, excellent chemical and mechanical stability, superb surface area, and good optical transparency. Therefore, it is expected to be an excellent and promising candidate in current material science research and nanotechnology. However, pristine graphene sheets are not suitable as flexible transparent conductors and many more applications due to the presence of defects, agglomeration behavior, and grain boundaries, while having high sheet resistance which can be broken easily and facing objection for designing controlled functionality. One decisive approach to explore the ability of graphene is to architect a graphene composite as a perfect building block for controllable functionalization with another carbon material with logical C–C junction formation. In this context, carbon nanotubes (CNTs) act as reinforcing bars that not only restrict the agglomeration behavior but also generate the synergistic effect between them as well as a bridge between different crystalline domains with outstanding chemical and physical properties. Therefore, this article aims to present readers with a better understanding of hybrid carbon design by creating covalent interconnection between CNT and graphene for energy-related applications.
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Affiliation(s)
- Waseem Raza
- Department of Chemistry, Indian Institute of Technology Delhi Hauz Khas New Delhi 110016 India
- Department of Materials Science and Engineering, WW4-LKO, University of Erlangen-Nuremberg Martensstrasse 7 91058 Erlangen Germany
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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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Chung WH, Jang YR, Hwang YT, Kim SH, Kim HS. The surface plasmonic welding of silver nanowires via intense pulsed light irradiation combined with NIR for flexible transparent conductive films. NANOSCALE 2020; 12:17725-17737. [PMID: 32558847 DOI: 10.1039/c9nr10819j] [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, surface plasmonic welding of silver nanowires (AgNWs) by intense pulse light (IPL) combined with NIR was investigated. AgNWs were coated on a flexible PET (polyethylene terephthalate) substrate using a bar-coater. The coated AgNW films were welded at room temperature and under ambient conditions by white IPL from a xenon lamp, assisted with light from a UV-C (ultraviolet C) and NIR (near infra-red) lamp using an in-house multi-wavelength IPL welding system. In order to investigate the welding mechanism, in situ monitoring with a Wheatstone bridge electrical circuit was performed. The sheet resistance changes of AgNW films during the welding process were monitored under various IPL conditions (e.g. light energy and on-time) with and without UV-C and NIR light irradiation. The microstructure of the welded AgNW film and the interface between the AgNW film and the PET substrate were observed using a scanning electron microscope (SEM) and transmission electron microscope (TEM). COMSOL multi-physics simulations were conducted and compared with the in situ monitoring results to discuss the in-depth mechanism of the IPL welding of AgNWs and its dependence on the wavelength of light. From this study, the optimal IPL welding conditions and appropriate wavelength were suggested, and the optimized IPL welding process could produce AgNW film with a lower sheet resistance (45.2 Ω sq-1) and high transparency (96.65%) without damaging the PET substrate.
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Affiliation(s)
- Wan-Ho Chung
- Department of Mechanical Engineering Hanyang University, 17 Haendang-Dong, Seongdong-Gu, Seoul 133-791, South Korea.
| | - Yong-Rae Jang
- Department of Mechanical Engineering Hanyang University, 17 Haendang-Dong, Seongdong-Gu, Seoul 133-791, South Korea.
| | - Yeon-Taek Hwang
- Department of Mechanical Engineering Hanyang University, 17 Haendang-Dong, Seongdong-Gu, Seoul 133-791, South Korea.
| | - Sang-Ho Kim
- Flexio Co. Ltd., 125-10, Techno 2-ro, Yuseong-gu, Daejeon, 34024, South Korea
| | - Hak-Sung Kim
- Department of Mechanical Engineering Hanyang University, 17 Haendang-Dong, Seongdong-Gu, Seoul 133-791, South Korea. and Institute of Nano Science and Technology, Hanyang University, 17 Haendang-Dong, Seongdong-Gu, Seoul, 133-791, South Korea
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Mechanical and Electroconductive Properties of Mono- and Bilayer Graphene–Carbon Nanotube Films. COATINGS 2019. [DOI: 10.3390/coatings9020074] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
This article presents the results of a computer study of electrical conductivity and deformation behavior of new graphene–carbon nanotube (CNT) composite films under bending and stretching. Mono- and bilayer hybrid structures with CNTs (10,0) and (12,0) and an inter-tube distance of 10 and 12 hexagons were considered. It is revealed that elastic deformation is characteristic for mono- and bilayer composite films both in bending and stretching. It is found that, in the case of bending in a direction perpendicular to CNTs, the composite film takes the form of an arc, and, in the case of bending in a direction along CNTs, the composite film exhibits behavior that is characteristic of a beam subjected to bending deformation as a result of exposure to vertical force at its free end. It is shown that mono- and bilayer composite films are more resistant to axial stretching in the direction perpendicular to CNTs. The bilayer composite films with an inter-tube distance of 12 hexagons demonstrate the greatest resistance to stretching in a direction perpendicular to CNTs. It is established that the CNT diameter and the inter-tube distance significantly affect the strength limits of composite films under axial stretching in a direction along CNTs. The composite films with CNT (10,0) and an inter-tube distance of 12 hexagons exhibit the highest resistance to stretching in a direction along CNTs. The calculated distribution of local stresses of the atomic network of deformed mono- and bilayer composite films showed that the maximum stresses fall on atoms forming covalent bonds between graphene and CNT, regardless of the CNT diameter and inter-tube distance. The destruction of covalent bonds occurs at the stress of ~1.8 GPa. It is revealed that the electrical resistance of mono- and bilayer composite films decreases with increasing bending. At the same time, the electrical resistance of a bilayer film is 1.5–2 times less than that of a monolayer film. The lowest electrical resistance is observed for composite films with a CNT (12,0) of metallic conductivity.
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11
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Huang Y, Lin J, Liu L, Lu Q, Zhang X, Zhang G, Li D. Enhanced performance of graphene transparent conductive films by introducing SiO2 bilayer antireflection nanostructure. NEW J CHEM 2019. [DOI: 10.1039/c9nj03671g] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The performance of graphene transparent conductive films (TCFs) can be greatly enhanced by introducing silica nanospheres/acid-catalyzed silica bilayer antireflection (AR) nanostructure.
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Affiliation(s)
- Yue Huang
- School of Chemistry and Molecular Engineering
- East China Normal University
- Shanghai 200241
- P. R. China
| | - Jiayi Lin
- School of Chemistry and Molecular Engineering
- East China Normal University
- Shanghai 200241
- P. R. China
| | - Liyue Liu
- School of Chemistry and Molecular Engineering
- East China Normal University
- Shanghai 200241
- P. R. China
| | - Qing Lu
- School of Chemistry and Molecular Engineering
- East China Normal University
- Shanghai 200241
- P. R. China
| | - Xiaoling Zhang
- School of Chemistry and Molecular Engineering
- East China Normal University
- Shanghai 200241
- P. R. China
| | - Ganghua Zhang
- Shanghai Key Laboratory of Engineering Materials Application and Evaluation
- Shanghai Research Institute of Materials
- Shanghai 200437
- P. R. China
| | - Dezeng Li
- School of Chemistry and Molecular Engineering
- East China Normal University
- Shanghai 200241
- P. R. China
- State Key Laboratory of Precision Spectroscopy
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