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Huang Q, Zhu Y. Patterning of Metal Nanowire Networks: Methods and Applications. ACS APPLIED MATERIALS & INTERFACES 2021; 13:60736-60762. [PMID: 34919389 DOI: 10.1021/acsami.1c14816] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
With the advance in flexible and stretchable electronics, one-dimensional nanomaterials such as metal nanowires have drawn much attention in the past 10 years or so. Metal nanowires, especially silver nanowires, have been recognized as promising candidate materials for flexible and stretchable electronics. Owing to their high electrical conductivity and high aspect ratio, metal nanowires can form electrical percolation networks, maintaining high electrical conductivity under deformation (e.g., bending and stretching). Apart from coating metal nanowires for making large-area transparent conductive films, many applications require patterned metal nanowires as electrodes and interconnects. Precise patterning of metal nanowire networks is crucial to achieve high device performances. Therefore, a high-resolution, designable, and scalable patterning of metal nanowire networks is important but remains a critical challenge for fabricating high-performance electronic devices. This review summarizes recent advances in patterning of metal nanowire networks, using subtractive methods, additive methods of nanowire dispersions, and printing methods. Representative device applications of the patterned metal nanowire networks are presented. Finally, challenges and important directions in the area of the patterning of metal nanowire networks for device applications are discussed.
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Affiliation(s)
- Qijin Huang
- Department of Mechanical and Aerospace Engineering, North Carolina State University, Raleigh 27695, North Carolina, United States
| | - Yong Zhu
- Department of Mechanical and Aerospace Engineering, North Carolina State University, Raleigh 27695, North Carolina, United States
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2
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Papanastasiou DT, Charvin N, Resende J, Nguyen VH, Sekkat A, Muñoz-Rojas D, Jiménez C, Flandin L, Bellet D. Effects of non-homogeneity and oxide coating on silver nanowire networks under electrical stress: comparison between experiment and modeling. NANOTECHNOLOGY 2021; 32:445702. [PMID: 34374663 DOI: 10.1088/1361-6528/ac1632] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2021] [Accepted: 07/19/2021] [Indexed: 06/13/2023]
Abstract
Silver nanowire (AgNW) networks are among the most promising indium-free, flexible transparent electrodes for energy, lighting and heating devices. However, the lack of stability of such networks is a key factor that limits their industrial application. While applications require homogeneous networks, non-homogeneous AgNW networks are intentionally prepared in the present work to probe the mechanisms leading to failure under electrical stress. We show that induced non-homogeneities have a strong impact both on the spatial distribution of temperature (measured by IR imaging) and the current density throughout the electrode (as deduced from modeling). Regions with higher current density under elevated electrical stress are correlated to the origin of degradation. Furthermore, the influence of a zinc oxide (ZnO) layer on electrical performances of non-homogeneous specimens is studied. Thanks to ZnO coating, the tortuosity of electrical potential lines measured by the one-probe mapping technique is much lower than for bare networks. Additionally, coated network electrical failure occurs at 40% higher voltage compared to bare network, over 18 V, while reaching superior power-induced heating of 360 °C. The results presented here will contribute to the design and fabrication of more robust nanowire networks, particularly for application in transparent heaters.
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Affiliation(s)
| | - Nicolas Charvin
- Univ. Grenoble Alpes, Univ. Savoie Mont Blanc, CNRS, Grenoble INP, LEPMI, F-38000 Grenoble, France
| | - Joao Resende
- AlmaScience Colab, Madan Parque, 2829-516 Caparica, Portugal
| | - Viet Huong Nguyen
- Faculty of Materials Science and Engineering, Phenikaa University, Hanoi 12116, Vietnam
| | - Abderrahime Sekkat
- Univ. Grenoble Alpes, CNRS, Grenoble INP, LMGP, F-38000 Grenoble, France
| | - David Muñoz-Rojas
- Univ. Grenoble Alpes, CNRS, Grenoble INP, LMGP, F-38000 Grenoble, France
| | - Carmen Jiménez
- Univ. Grenoble Alpes, CNRS, Grenoble INP, LMGP, F-38000 Grenoble, France
| | - Lionel Flandin
- Univ. Grenoble Alpes, Univ. Savoie Mont Blanc, CNRS, Grenoble INP, LEPMI, F-38000 Grenoble, France
| | - Daniel Bellet
- Univ. Grenoble Alpes, CNRS, Grenoble INP, LMGP, F-38000 Grenoble, France
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3
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Zhuang A, Pan Q, Qian Y, Fan S, Yao X, Song L, Zhu B, Zhang Y. Transparent Conductive Silk Film with a PEDOT-OH Nano Layer as an Electroactive Cell Interface. ACS Biomater Sci Eng 2021; 7:1202-1215. [PMID: 33599501 DOI: 10.1021/acsbiomaterials.0c01665] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Bioelectronics based on biomaterial substrates are advancing toward biomedical applications. As excellent conductors, poly(3,4-ethylenedioxythiophene) (PEDOT) and its derivatives have been widely developed in this field. However, it is still a big challenge to obtain a functional layer with a good electroconductive property, transparency, and strong adhesion on the biosubstrate. In this work, poly(hydroxymethyl-3,4-ethylenedioxythiophene) (PEDOT-OH) was chemically polymerized and deposited on the surface of a regenerated silk fibroin (RSF) film in an aqueous system. Sodium dodecyl sulfate (SDS) was used as the surfactant to form micelles which are beneficial to the polymer structure. To overcome the trade-off between transparency and the electroconductive property of the PEDOT-OH coating, a composite oxidant recipe of FeCl3 and ammonium persulfate (APS) was developed. Through electrostatic interaction of oppositely charged doping ions, a well-organized conductive nanoscale coating formed and a transparent conductive RSF/PEDOT-OH film was produced, which can hardly be achieved in a traditional single oxidant system. The produced film had a sheet resistance (Rs) of 5.12 × 104 Ω/square corresponding to a conductivity of 8.9 × 10-2 S/cm and a maximum transmittance above 73% in the visible range. In addition, strong adhesion between PEDOT-OH and RSF and favorable electrochemical stability of the film were demonstrated. Desirable transparency of the film allowed real-time observation of live cells. Furthermore, the PEDOT-OH layer provided an improved environment for adhesion and differentiation of PC12 cells compared to the RSF surface alone. Finally, the feasibility of using the RSF/PEDOT-OH film to electrically stimulate PC12 cells was demonstrated.
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Affiliation(s)
- Ao Zhuang
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Shanghai Belt and Road Joint Laboratory of Advanced Fiber and Low-Dimension Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, People's Republic of China
| | - Qichao Pan
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Shanghai Belt and Road Joint Laboratory of Advanced Fiber and Low-Dimension Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, People's Republic of China
| | - Ying Qian
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Shanghai Belt and Road Joint Laboratory of Advanced Fiber and Low-Dimension Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, People's Republic of China
| | - Suna Fan
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Shanghai Belt and Road Joint Laboratory of Advanced Fiber and Low-Dimension Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, People's Republic of China
| | - Xiang Yao
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Shanghai Belt and Road Joint Laboratory of Advanced Fiber and Low-Dimension Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, People's Republic of China
| | - Lujie Song
- Department of Urology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai 200233, People's Republic of China
| | - Bo Zhu
- School of Materials Science and Engineering, Shanghai University, Shanghai 200444, People's Republic of China
| | - Yaopeng Zhang
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Shanghai Belt and Road Joint Laboratory of Advanced Fiber and Low-Dimension Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, People's Republic of China
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Development of robust, ultra-smooth, flexible and transparent regenerated silk composite films for bio-integrated electronic device applications. Int J Biol Macromol 2021; 176:498-509. [PMID: 33571588 DOI: 10.1016/j.ijbiomac.2021.02.051] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2020] [Revised: 02/05/2021] [Accepted: 02/06/2021] [Indexed: 01/21/2023]
Abstract
Regenerated Silk Fibroin (RSF) films are considered promising substrate candidates primarily in the field of bio-integrated electronic device applications. The key issues that ought to be addressed to exploit the inherent advantages of silk thin films include enhancing their flexibility and chemical durability. Such films find a plethora of applications, the significant one being conformal, transparent microelectrode arrays. Elevated temperatures that are regularly used in lithographic processes tend to dehydrate RSF films, making them brittle. Furthermore, the solvents/etchants used in typical device fabrication results in the formation of micro-cracks. This paper addressed both these issues by developing composite films and studying the effect of biodegradable additives in enhancing flexibility and chemical durability without compromising on optical transparency and surface smoothness. Through our rigorous experimentation, regenerated silk blended with Polyvinyl Alcohol (Silk/PVA) is identified as the composite for achieving the objectives. Furthermore, the Cyto-compatibility studies suggest that Silk/PVA, along with all other silk composites, have shown above 80% cell viability, as verified using L929 fibroblast cell lines. Going a step further, we demonstrated the successful patterning of 32 channel optically transparent microelectrode array (MEA) pattern, with a minimum feature size of 5 μm above the free-standing and optically transparent Silk/PVA composite film.
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Matsukawa R, Miyamoto A, Yokota T, Someya T. Skin Impedance Measurements with Nanomesh Electrodes for Monitoring Skin Hydration. Adv Healthc Mater 2020; 9:e2001322. [PMID: 33084247 DOI: 10.1002/adhm.202001322] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Revised: 09/19/2020] [Indexed: 12/22/2022]
Abstract
The importance of continuous monitoring of skin hydration in daily life, to aid in the diagnosis of skin diseases, is rising. Electrodes that can be worn directly on the skin are attracting attention as an effective means. However, they should not inhibit natural water evaporation from the skin and should not cause inflammation or irritation even if they are attached to the body for long periods of time. In this study, nanomesh electrodes that have previously been reported to exhibit high biocompatibility are also found to exhibit high water vapor permeability, resulting in properties that prevent skin dampness. Furthermore, the skin impedance measured using nanomesh electrodes is found to correlate with the hydration level of skin measured using existing medical equipment. This study provides a new approach to measure skin hydration in conditions close to bare skin.
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Affiliation(s)
- Ryotaro Matsukawa
- Department of Electrical Engineering and Information Systems School of Engineering The University of Tokyo 7‐3‐1 Hongo, Bunkyo‐ku Tokyo 113–8656 Japan
| | - Akihito Miyamoto
- Department of Electrical Engineering and Information Systems School of Engineering The University of Tokyo 7‐3‐1 Hongo, Bunkyo‐ku Tokyo 113–8656 Japan
| | - Tomoyuki Yokota
- Department of Electrical Engineering and Information Systems School of Engineering The University of Tokyo 7‐3‐1 Hongo, Bunkyo‐ku Tokyo 113–8656 Japan
| | - Takao Someya
- Department of Electrical Engineering and Information Systems School of Engineering The University of Tokyo 7‐3‐1 Hongo, Bunkyo‐ku Tokyo 113–8656 Japan
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Park JH, Seok HJ, Kamaraj E, Park S, Kim HK. Highly transparent and flexible Ag nanowire-embedded silk fibroin electrodes for biocompatible flexible and transparent heater. RSC Adv 2020; 10:31856-31862. [PMID: 35518126 PMCID: PMC9056558 DOI: 10.1039/d0ra05990k] [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: 07/09/2020] [Accepted: 08/08/2020] [Indexed: 02/06/2023] Open
Abstract
We investigated the electrical, optical and mechanical properties of silver (Ag) nanowire (NW) embedded into a silk fibroin (SF) substrate to create high performance, flexible, transparent, biocompatible, and biodegradable heaters for use in wearable electronics. The Ag NW-embedded SF showed a low sheet resistance of 15 Ω sq-1, high optical transmittance of 85.1%, and a small inner/outer critical bending radius of 1 mm. In addition, the Ag NW-embedded SF showed a constant resistance change during repeated bending, folding, and rolling because the connectivity of the Ag NW embedded into the SF substrate was well maintained. Furthermore, the biocompatible and biodegradable Ag NW-embedded SF substrate served as a flexible interconnector for wearable electronics. The high performance of the transparent and flexible heater demonstrated that an Ag NW-embedded SF-based heater can act as a biocompatible and biodegradable substrate for wearable heaters for the human body.
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Affiliation(s)
- Jin-Hyeok Park
- School of Advanced Materials Science and Engineering, Sungkyunkwan University 2066, Seobu-ro, Jangan-gu Suwon-si Gyeonggi-do 16419 Republic of Korea
| | - Hae-Jun Seok
- School of Advanced Materials Science and Engineering, Sungkyunkwan University 2066, Seobu-ro, Jangan-gu Suwon-si Gyeonggi-do 16419 Republic of Korea
| | - Eswaran Kamaraj
- Department of Chemistry, Kongju National University 56, Gongjudaehak-ro Gongju-si Chungcheongnam-do 32588 Republic of Korea
| | - Sanghyuk Park
- Department of Chemistry, Kongju National University 56, Gongjudaehak-ro Gongju-si Chungcheongnam-do 32588 Republic of Korea
| | - Han-Ki Kim
- School of Advanced Materials Science and Engineering, Sungkyunkwan University 2066, Seobu-ro, Jangan-gu Suwon-si Gyeonggi-do 16419 Republic of Korea
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7
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Jasaitis L, Silver CD, Rawlings AE, Peters DT, Whelan F, Regan L, Pasquina-Lemonche L, Potts JR, Johnson SD, Staniland SS. Rational Design and Self-Assembly of Coiled-Coil Linked SasG Protein Fibrils. ACS Synth Biol 2020; 9:1599-1607. [PMID: 32551507 DOI: 10.1021/acssynbio.0c00156] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Protein engineering is an attractive approach for the self-assembly of nanometer-scale architectures for a range of potential nanotechnologies. Using the versatile chemistry provided by protein folding and assembly, coupled with amino acid side-chain functionality, allows for the construction of precise molecular "protein origami" hierarchical patterned structures for a range of nanoapplications such as stand-alone enzymatic pathways and molecular machines. The Staphyloccocus aureus surface protein SasG is a rigid, rod-like structure shown to have high mechanical strength due to "clamp-like" intradomain features and a stabilizing interface between the G5 and E domains, making it an excellent building block for molecular self-assembly. Here we characterize a new two subunit system composed of the SasG rod protein genetically conjugated with de novo designed coiled-coils, resulting in the self-assembly of fibrils. Circular dichroism (CD) and quartz-crystal microbalance with dissipation (QCM-D) are used to show the specific, alternating binding between the two subunits. Furthermore, we use atomic force microscopy (AFM) to study the extent of subunit polymerization in a liquid environment, demonstrating self-assembly culminating in the formation of linear macromolecular fibrils.
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Affiliation(s)
- Lukas Jasaitis
- Department of Chemistry, University of Sheffield, Sheffield S3 7HF, United Kingdom
| | - Callum D. Silver
- Department of Electronic Engineering, University of York, York YO10 5DD, United Kingdom
| | - Andrea E. Rawlings
- Department of Chemistry, University of Sheffield, Sheffield S3 7HF, United Kingdom
| | - Daniel T. Peters
- Biosciences Institute, Newcastle University, Newcastle upon Tyne NE2 4HH, United Kingdom
| | - Fiona Whelan
- School of Biological Sciences, University of Adelaide, Adelaide, SA 5005, Australia
| | - Lynne Regan
- Institute for Quantitative Biology, Biochemistry and Biotechnology, University of Edinburgh, Edinburgh EH9 3JU, Scotland
| | - Laia Pasquina-Lemonche
- Department of Physics and Astronomy, University of Sheffield, Sheffield S3 7HF, United Kingdom
| | - Jennifer R. Potts
- School of Life and Environmental Science, University of Sydney, Sydney, NSW 2006, Australia
- Department of Biology, University of York, York YO10 5DD, United Kingdom
| | - Steven D. Johnson
- Department of Electronic Engineering, University of York, York YO10 5DD, United Kingdom
| | - Sarah S. Staniland
- Department of Chemistry, University of Sheffield, Sheffield S3 7HF, United Kingdom
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Fabrication and Characterization of Silk Fibroin/Curcumin Sustained-Release Film. MATERIALS 2019; 12:ma12203340. [PMID: 31614998 PMCID: PMC6829413 DOI: 10.3390/ma12203340] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/03/2019] [Accepted: 10/11/2019] [Indexed: 11/16/2022]
Abstract
In the present work, a sustained-release film composed of silk fibroin (SF), curcumin (Cur), glutaraldehyde (GA), and glycerol (Gly) was prepared successfully for wound dressings. Features relevant to wound dressings of SF/Gly/GA/Cur film were assessed. Physical and chemical properties of the fabricated materials were also characterized. The results showed that the prepared SF/Gly/GA/Cur film demonstrated a good sustained-release performance, flexibility, and gas permeability. In addition, it was found that the prepared SF/Gly/GA/Cur film possessed the capability to effectively inhibit the growth of bacteria and prevent bacterial penetration with a suitable water vapor transmission rate. Furthermore, the prepared composite film was non-cytotoxic, which makes it an ideal material for wound dressings.
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9
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Arif S, Umar M, Kim S. Interacting Metal-Insulator-Metal Resonator by Nanoporous Silver and Silk Protein Nanomembranes and Its Water-Sensing Application. ACS OMEGA 2019; 4:9010-9016. [PMID: 31459989 PMCID: PMC6648433 DOI: 10.1021/acsomega.9b00838] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2019] [Accepted: 05/10/2019] [Indexed: 05/28/2023]
Abstract
Planar and lithography-free metal-insulator-metal (MIM) resonators based on the Fabry-Pérot etalon are attractive for biochemical sensing applications because of their acceptable optical performance and cost-effectiveness. However, injecting analytes into the insulating layer where the optical field is localized (high light-matter interaction) is difficult. Here, planar and lithography-free MIM resonators interacting with their environment are reported. In the MIM, molecules of a liquid can infiltrate the inherent nanopores in the deposited silver nanomembrane and be absorbed into the silk protein hydrogel membrane. The silk layer is swollen when water molecules are absorbed, inducing a large shift in the resonance wavelength. Thus, in this study, the proposed MIM resonator was applied as a highly sensitive water sensor, and a water content as low as 0.008% in organic solvents could be determined by reading the shift in the transmission peak. This limit can be lowered further by using a high-resolution spectrometer and a thicker silk layer. In addition, the area of interaction can be artificially selected by applying an elastomer stamp and a patterned photoresist window.
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Affiliation(s)
- Sara Arif
- Department
of Energy Systems Research and Department of Physics, Ajou University, Suwon 16499, Republic
of Korea
| | - Muhammad Umar
- Department
of Energy Systems Research and Department of Physics, Ajou University, Suwon 16499, Republic
of Korea
| | - Sunghwan Kim
- Department
of Energy Systems Research and Department of Physics, Ajou University, Suwon 16499, Republic
of Korea
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Yang X, Du D, Wang Y, Zhao Y. Silver Nanowires Inks for Flexible Circuit on Photographic Paper Substrate. MICROMACHINES 2018; 10:mi10010022. [PMID: 30597976 PMCID: PMC6356428 DOI: 10.3390/mi10010022] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/25/2018] [Revised: 12/18/2018] [Accepted: 12/24/2018] [Indexed: 11/16/2022]
Abstract
Silver nanowires (AgNWs) have inspired many research interests due to their better properties in optical, electric, and flexible applications. One such exploitable use is as the electrical conductive fillers for print electronics. In this paper, AgNWs with mean a diameter of 80 nm and mean length of 13.49 μm were synthesized using the polyol solvothermal method. A sonication-induced scission process was used to obtain AgNWs with a length range of 7.64–11.21 μm. Further AgNWs inks were prepared with the as-synthesized AgNWs as conductive fillers in anhydrous ethanol. The conductive inks were coated on resin coated photographic paper substrate using the knife coating process and dried at room temperature. The effects of the number of layers of AgNWs coating, the concentration of AgNWs, and the length of AgNWs on the microstructure and electrical properties of samples were investigated by scanning electron microscopy and using the four-point probe method. The results show that the conductivity of the AgNWs coating increases with the increase in the number of layers in the AgNWs coating, concentration and length of the AgNWs.
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Affiliation(s)
- Xing Yang
- School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 610054, China.
| | - Dexi Du
- School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 610054, China.
| | - Yuehui Wang
- Department of Materials and Food, University of Electronic Science and Technology of China Zhongshan Institute, Zhongshan 528402, China.
| | - Yuzhen Zhao
- Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China.
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Jo M, Min K, Roy B, Kim S, Lee S, Park JY, Kim S. Protein-Based Electronic Skin Akin to Biological Tissues. ACS NANO 2018; 12:5637-5645. [PMID: 29792681 DOI: 10.1021/acsnano.8b01435] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Human skin provides an interface that transduces external stimuli into electrical signals for communication with the brain. There has been considerable effort to produce soft, flexible, and stretchable electronic skin (E-skin) devices. However, common polymers cannot imitate human skin perfectly due to their poor biocompatibility, biofunctionality, and permeability to many chemicals and biomolecules. Herein, we report on highly flexible, stretchable, conformal, molecule-permeable, and skin-adhering E-skins that combine a metallic nanowire (NW) network and silk protein hydrogel. The silk protein hydrogels offer high stretchability and stability under hydration through the addition of Ca2+ ions and glycerol. The NW electrodes exhibit stable operation when subjected to large deformations and hydration. Meanwhile, the hydrogel window provides water and biomolecules to the electrodes (communication between the environment and the electrode). These favorable characteristics allow the E-skin to be capable of sensing strain, electrochemical, and electrophysiological signals.
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Affiliation(s)
| | - Kyungtaek Min
- Department of Nano-Optical Engineering , Korea Polytechnic University , Siheung 15073 , Republic of Korea
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12
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Xie H, Yang X, Du D, Zhao Y, Wang Y. Flexible Transparent Conductive Film Based on Random Networks of Silver Nanowires. MICROMACHINES 2018; 9:E295. [PMID: 30424228 PMCID: PMC6187231 DOI: 10.3390/mi9060295] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/21/2018] [Revised: 05/30/2018] [Accepted: 06/01/2018] [Indexed: 11/16/2022]
Abstract
We synthesized silver nanowires (AgNWs) with a mean diameter of about 120 nm and 20⁻70 μm in length using a polyol process. The flexible transparent conductive AgNWs films were prepared using the vacuum filtration-transferring process, in which random AgNWs networks were transferred to a polyethylene terephthalate (PET) substrate after being deposited on mixed cellulose esters (MCEs). Furthermore, the photoelectric and mechanical properties of the AgNWs films were studied. The scanning electron microscopy images show that the AgNWs randomly, uniformly distribute on the surface of the PET substrate, which indicates that the AgNWs structure was preserved well after the transfer process. The film with 81% transmittance at 550 nm and sheet resistance about 130 Ω·sq-1 can be obtained. It is sufficient to be used as a flexible transparent conductive film. However, the results of the bending test and tape test show that the adhesion of AgNWs and PET substrate is poor, because the sheet resistance of film increases during the bending test and tape test. The 0.06 W LED lamp with a series fixed on the surface of the AgNWs-PET electrode with conductive adhesive was luminous, and it was still luminous after bent.
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Affiliation(s)
- Hui Xie
- Department of Chemistry and Biology, University of Electronic Science and Technology of China Zhongshan Institute, Zhongshan 528402, China.
| | - Xing Yang
- State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Microelectronics and Solid-State Electronics, University of Electronic Science and Technology of China, Chengdu 610054, China.
| | - Dexi Du
- State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Microelectronics and Solid-State Electronics, University of Electronic Science and Technology of China, Chengdu 610054, China.
| | - Yuzhen Zhao
- Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China.
| | - Yuehui Wang
- Department of Chemistry and Biology, University of Electronic Science and Technology of China Zhongshan Institute, Zhongshan 528402, China.
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Flexible transparent conductive film based on silver nanowires and reduced graphene oxide. ACTA ACUST UNITED AC 2018. [DOI: 10.1007/s11801-018-7267-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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14
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Koh LD, Yeo J, Lee YY, Ong Q, Han M, Tee BCK. Advancing the frontiers of silk fibroin protein-based materials for futuristic electronics and clinical wound-healing (Invited review). MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2018. [DOI: 10.1016/j.msec.2018.01.007] [Citation(s) in RCA: 57] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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