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Isari AA, Ghaffarkhah A, Hashemi SA, Wuttke S, Arjmand M. Structural Design for EMI Shielding: From Underlying Mechanisms to Common Pitfalls. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024; 36:e2310683. [PMID: 38467559 DOI: 10.1002/adma.202310683] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/13/2023] [Revised: 02/11/2024] [Indexed: 03/13/2024]
Abstract
Modern human civilization deeply relies on the rapid advancement of cutting-edge electronic systems that have revolutionized communication, education, aviation, and entertainment. However, the electromagnetic interference (EMI) generated by digital systems poses a significant threat to the society, potentially leading to a future crisis. While numerous efforts are made to develop nanotechnological shielding systems to mitigate the detrimental effects of EMI, there is limited focus on creating absorption-dominant shielding solutions. Achieving absorption-dominant EMI shields requires careful structural design engineering, starting from the smallest components and considering the most effective electromagnetic wave attenuating factors. This review offers a comprehensive overview of shielding structures, emphasizing the critical elements of absorption-dominant shielding design, shielding mechanisms, limitations of both traditional and nanotechnological EMI shields, and common misconceptions about the foundational principles of EMI shielding science. This systematic review serves as a scientific guide for designing shielding structures that prioritize absorption, highlighting an often-overlooked aspect of shielding science.
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Affiliation(s)
- Ali Akbar Isari
- Nanomaterials and Polymer Nanocomposites Laboratory, School of Engineering, University of British Columbia, Kelowna, BC, V1V 1V7, Canada
| | - Ahmadreza Ghaffarkhah
- Nanomaterials and Polymer Nanocomposites Laboratory, School of Engineering, University of British Columbia, Kelowna, BC, V1V 1V7, Canada
| | - Seyyed Alireza Hashemi
- Nanomaterials and Polymer Nanocomposites Laboratory, School of Engineering, University of British Columbia, Kelowna, BC, V1V 1V7, Canada
| | - Stefan Wuttke
- Basque Centre for Materials, Applications and Nanostructures (BCMaterials), Bld. Martina Casiano, 3rd. Floor UPV/EHU Science Park Barrio Sarriena s/n, Leioa, 48940, Spain
- IKERBASQUE, Basque Foundation for Science, Bilbao, 48013, Spain
| | - Mohammad Arjmand
- Nanomaterials and Polymer Nanocomposites Laboratory, School of Engineering, University of British Columbia, Kelowna, BC, V1V 1V7, Canada
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Liao H, Xiao Y, Xiao T, Kuang H, Feng X, Sun X, Cui G, Duan X, Shi P. Novel Conductive AgNP-Based Adhesive Based on Novel Poly (Ionic Liquid)-Based Waterborne Polyurethane Chloride Salts for E-Textiles. Polymers (Basel) 2024; 16:540. [PMID: 38399919 PMCID: PMC10892050 DOI: 10.3390/polym16040540] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2024] [Revised: 01/27/2024] [Accepted: 02/09/2024] [Indexed: 02/25/2024] Open
Abstract
The emergence of novel e-textile materials that combine the inherent qualities of the textile substrate (lightweight, soft, breathable, durable, etc.) with the functionality of micro/nano-electronic materials (conductive, dielectric, sensing, etc.) has resulted in a trend toward miniaturization, integration, and intelligence in new electronic devices. However, the formation of a conductive network by micro/nano-conductive materials on textiles necessitates high-temperature sintering, which inevitably causes substrate aging and component damage. Herein, a bis-hydroxy-imidazolium chloride salt as a hard segment to synthesize a waterborne polyurethane (WPU) adhesive is designed and prepared. When used in nano-silver-based printing coatings, it offers strong adherence for coatings, reaching 16 N cm-1; on the other hand, the introduction of chloride ions enables low-temperature (60 °C) chemical sintering to address the challenge of secondary treatment and high-temperature sintering (>150 °C). Printed into flexible circuits, the resistivity can be controlled by the content of imidazolium salts anchored in the molecular chain of the WPU from a maximum resistivity of 3.1 × 107 down to 5.8 × 10-5 Ω m, and it can conduct a Bluetooth-type finger pulse detector with such low resistivity. As a flexible circuit, it also offers high stability against washing and adhesion, which the resistivity only reduces less than 20% after washing 10 times and adhesion. Owing to the adjustability of the resistivity, we fabricated an all-textile flexible pressure sensor that accurately differentiates different external pressures (min. 10 g, ~29 Pa), recognizes forms, and detects joint motions (finger bending and wrist flexion).
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Affiliation(s)
- Haiyang Liao
- School of Mechanical Engineering, Hunan University of Technology, Zhuzhou 412007, China; (H.L.)
- China Textile Academy (Zhejiang) Technology Research Institute Co., Ltd., Shaoxing 312071, China
| | - Yeqi Xiao
- School of Mechanical Engineering, Hunan University of Technology, Zhuzhou 412007, China; (H.L.)
| | - Tiemin Xiao
- School of Mechanical Engineering, Hunan University of Technology, Zhuzhou 412007, China; (H.L.)
| | - Hongjin Kuang
- School of Mechanical Engineering, Hunan University of Technology, Zhuzhou 412007, China; (H.L.)
| | - Xiaolong Feng
- School of Mechanical Engineering, Hunan University of Technology, Zhuzhou 412007, China; (H.L.)
| | - Xiao Sun
- School of Mechanical Engineering, Hunan University of Technology, Zhuzhou 412007, China; (H.L.)
| | - Guixin Cui
- China Textile Academy (Zhejiang) Technology Research Institute Co., Ltd., Shaoxing 312071, China
| | - Xiaofei Duan
- School of Mechanical Engineering, Hunan University of Technology, Zhuzhou 412007, China; (H.L.)
| | - Pu Shi
- School of Mechanical Engineering, Hunan University of Technology, Zhuzhou 412007, China; (H.L.)
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3
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Zarei M, Li M, Medvedeva EE, Sharma S, Kim J, Shao Z, Walker SB, LeMieux M, Liu Q, Leu PW. Flexible Embedded Metal Meshes by Sputter-Free Crack Lithography for Transparent Electrodes and Electromagnetic Interference Shielding. ACS APPLIED MATERIALS & INTERFACES 2024; 16:6382-6393. [PMID: 38279914 PMCID: PMC10859897 DOI: 10.1021/acsami.3c16405] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2023] [Revised: 01/14/2024] [Accepted: 01/14/2024] [Indexed: 01/29/2024]
Abstract
A facile and novel fabrication method is demonstrated for creating flexible poly(ethylene terephthalate) (PET)-embedded silver meshes using crack lithography, reactive ion etching (RIE), and reactive silver ink. The crack width and spacing in a waterborne acrylic emulsion polymer are controlled by the thickness of the polymer and the applied stress due to heating and evaporation. Our innovative fabrication technique eliminates the need for sputtering and ensures stronger adhesion of the metal meshes to the PET substrate. Crack trench depths over 5 μm and line widths under 5 μm have been achieved. As a transparent electrode, our flexible embedded Ag meshes exhibit a visible transmission of 91.3% and sheet resistance of 0.54 Ω/sq as well as 93.7% and 1.4 Ω/sq. This performance corresponds to figures of merit (σDC/σOP) of 7500 and 4070, respectively. For transparent electromagnetic interference (EMI) shielding, the metal meshes achieve a shielding efficiency (SE) of 42 dB with 91.3% visible transmission and an EMI SE of 37.4 dB with 93.7% visible transmission. We demonstrate the highest transparent electrode performance of crack lithography approaches in the literature and the highest flexible transparent EMI shielding performance of all fabrication approaches in the literature. These metal meshes may have applications in transparent electrodes, EMI shielding, solar cells, and organic light-emitting diodes.
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Affiliation(s)
- Mehdi Zarei
- Department
of Mechanical Engineering, University of
Pittsburgh, Pittsburgh, Pennsylvania 15261, United States
| | - Mingxuan Li
- Department
of Chemical Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, United States
| | - Elizabeth E. Medvedeva
- Department
of Bioengineering, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, United States
| | - Sooraj Sharma
- Department
of Materials Science, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, United States
| | - Jungtaek Kim
- Department
of Industrial Engineering, University of
Pittsburgh, Pittsburgh, Pennsylvania 15261, United States
| | - Zefan Shao
- Department
of Mechanical Engineering, University of
Pittsburgh, Pittsburgh, Pennsylvania 15261, United States
| | - S. Brett Walker
- Electroninks
Incorporated, Austin, Texas 78744, United States
| | - Melbs LeMieux
- Electroninks
Incorporated, Austin, Texas 78744, United States
| | - Qihan Liu
- Department
of Mechanical Engineering, University of
Pittsburgh, Pittsburgh, Pennsylvania 15261, United States
| | - Paul W. Leu
- Department
of Mechanical Engineering, University of
Pittsburgh, Pittsburgh, Pennsylvania 15261, United States
- Department
of Chemical Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, United States
- Department
of Industrial Engineering, University of
Pittsburgh, Pittsburgh, Pennsylvania 15261, United States
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Chung SI, Kang TW, Kim PK, Ha TG, Hong YP. Highly Transparent Ka-/W-Band Electromagnetic Shielding Films Based on Double-Layered Metal Meshes. ACS APPLIED MATERIALS & INTERFACES 2023; 15:56612-56622. [PMID: 37988133 DOI: 10.1021/acsami.3c14788] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2023]
Abstract
An electromagnetic (EM) wave-shielding film exhibiting high performance in high-frequency bands, such as the Ka- and W-bands, was fabricated by using double-layered metal meshes. The double-layered shielding (DLS) film consists of metallic micromesh and nanomesh electrodes (NMEs) on the upper and lower surfaces of a poly(ethylene terephthalate) (PET) film, respectively. The micromesh electrodes (MMEs) were fabricated such that they possessed a thickness higher than the line width, and they thus exhibited excellent electromagnetic wave-shielding performance in addition to optical transmittance. Moreover, the nanomesh electrodes helped prevent the deterioration of the shielding performance owing to the increase in frequency, which was possible by decreasing the aperture size of the mesh-type electrodes. The shielding effectiveness (SE) of the double-layered metal-mesh film was evaluated by using a shielding measurement system that is optimized for high frequencies. In addition, optical transmittance and flexibility tests were conducted. The results confirm that the double-layered shielding film exhibited a shielding effectiveness of more than 50 dB at an optical transmittance of 90% and a stable bending resistance of up to 5000 cycles at a radius of curvature of 6 mm. Double-layered metal-mesh films with such excellent performance are expected to be widely used in diverse applications such as the automobile, medical, and military industries.
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Affiliation(s)
- Sung-Il Chung
- Nano Hybrid Technology Research Center, Korea Electrotechnology Research Institute, Changwon 51543, Republic of Korea
| | - Tae-Weon Kang
- Electromagnetic Wave Metrology Group, Korea Research Institute of Standards and Science, Daejeon 34113, Republic of Korea
| | - Pan Kyeom Kim
- Nano Hybrid Technology Research Center, Korea Electrotechnology Research Institute, Changwon 51543, Republic of Korea
| | - Tae-Gyu Ha
- Nano Hybrid Technology Research Center, Korea Electrotechnology Research Institute, Changwon 51543, Republic of Korea
| | - Young-Pyo Hong
- Electromagnetic Wave Metrology Group, Korea Research Institute of Standards and Science, Daejeon 34113, Republic of Korea
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Qin D, Guo J, Liang M, Qin L, Chen L, He W. Modification of surface characteristics of ophthalmic biomaterial-polymethyl methacrylate induced by cobalt 60 gamma irradiation. PLoS One 2023; 18:e0291344. [PMID: 37713447 PMCID: PMC10503747 DOI: 10.1371/journal.pone.0291344] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2023] [Accepted: 08/27/2023] [Indexed: 09/17/2023] Open
Abstract
This study aims to observe the accelerated aging effect of 60Co gamma (γ) irradiation on poly (methyl methacrylate) (PMMA) under extreme conditions and determine the influence of different media states on aging. PMMA samples were prepared at room temperature under varying media conditions, including air and deionized water immersion. Then, the samples were irradiated with different doses (50, 250, 500, and 1000 KGy) of 60Co γ-rays. The compositional changes of the PMMA samples exposed to the rays at different periods were determined via Fourier transform infrared spectroscopy. The light transmission of the samples was characterized through ultraviolet-visible spectrophotometry, and the surface wettability of the samples was assessed via water contact angle measurements. Surface and microscopic changes in material morphology were analyzed using optical microscopy, ImageJ software, and scanning electron microscopy. Relative molecular mass and glass transition temperature were analyzed via gel permeation chromatography and differential scanning calorimetry. Thus, a comprehensive analysis of the effect of 60Co γ irradiation on the aging properties of PMMA was performed.
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Affiliation(s)
- Dong Qin
- Ophthalmology Department, The Third People’s Hospital of Chengdu, Chengdu, P R China
- Department of Ophthalmology, West China Hospital, Sichuan University, Chengdu, P R China
| | - Juan Guo
- Ophthalmology Department, The Third People’s Hospital of Chengdu, Chengdu, P R China
| | - Ming Liang
- Ophthalmology Department, The Third People’s Hospital of Chengdu, Chengdu, P R China
| | - Ling Qin
- Ophthalmology Department, The Third People’s Hospital of Chengdu, Chengdu, P R China
| | - Ling Chen
- Ophthalmology Department, The Third People’s Hospital of Chengdu, Chengdu, P R China
| | - Weimin He
- Department of Ophthalmology, West China Hospital, Sichuan University, Chengdu, P R China
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Wu W, Guo N, Zhang Y, Liu G, Yu L, Ma X, Li W, Chen M. The Fabrication, Properties, and Application of a Printed Green Ag NWs-Based Flexible Electrode and Circuit. ACS APPLIED MATERIALS & INTERFACES 2023. [PMID: 36882385 DOI: 10.1021/acsami.2c20270] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
A suitable conductive ink for office inkjet printers is important for the convenient design of flexible electrodes for triboelectric nanogenerators (TENG). Ag nanowires (Ag NWs) easily printed with an average short length of 1.65 μm were synthesized by using soluble NaCl as a growth regulator and adjusting the amount of chloride ion. The water-based Ag NWs ink with a low solid content of 1% but with low resistivity was produced. The printed flexible Ag NWs-based electrodes/circuits showed excellent conductivity with RS/R0 values kept at 1.03 after bending 50,000 times on PI substrate and an excellent anticlimate property in acidic conditions for 180 h on polyester woven fabric. The sheet resistance was reduced to 4.98 Ω/sqr heated at 30-50 °C for 3 min by a blower due to the formed excellent conductive network when compared to Ag NPs-based electrodes. Finally, the integration of printed Ag NWs electrode and circuits was applied to the TENG, which can be used to predict a robot's out-of-balance direction by the change of the TENG signal. In all, a suitable conductive ink with a short length of Ag NWs was fabricated, and flexible electrodes/circuits can be conveniently and easily printed by office inkjet printers.
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Affiliation(s)
- Wenxiu Wu
- School of Materials Science and Engineering, Tianjin Key Lab for Photoelectric Materials & Devices, National Demonstration Center for Experimental Function Materials Education, Tianjin University of Technology, Tianjin 300384, China
| | - Naiyuan Guo
- School of Materials Science and Engineering, Tianjin Key Lab for Photoelectric Materials & Devices, National Demonstration Center for Experimental Function Materials Education, Tianjin University of Technology, Tianjin 300384, China
| | - Yixuan Zhang
- School of Materials Science and Engineering, Tianjin Key Lab for Photoelectric Materials & Devices, National Demonstration Center for Experimental Function Materials Education, Tianjin University of Technology, Tianjin 300384, China
| | - Guoxu Liu
- CAS Center for Excellence in Nanoscience, Beijing Key Laboratory of Micro-nano Energy and Sensor, Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 101400, China
| | - Leiting Yu
- School of Materials Science and Engineering, Tianjin Key Lab for Photoelectric Materials & Devices, National Demonstration Center for Experimental Function Materials Education, Tianjin University of Technology, Tianjin 300384, China
| | - Xiaowei Ma
- College of Health and Exercise Science, Tianjin University of Sport, Tianjin 300381,China
| | - Wei Li
- School of Materials Science and Engineering, Tianjin Key Lab for Photoelectric Materials & Devices, National Demonstration Center for Experimental Function Materials Education, Tianjin University of Technology, Tianjin 300384, China
| | - Minfang Chen
- School of Materials Science and Engineering, Tianjin Key Lab for Photoelectric Materials & Devices, National Demonstration Center for Experimental Function Materials Education, Tianjin University of Technology, Tianjin 300384, China
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7
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Su Z, Yang H, Wang G, Zhang Y, Zhang J, Lin J, Jia D, Wang H, Lu Z, Hu P. Transparent and high-performance electromagnetic interference shielding composite film based on single-crystal graphene/hexagonal boron nitride heterostructure. J Colloid Interface Sci 2023; 640:610-618. [PMID: 36878078 DOI: 10.1016/j.jcis.2023.02.115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2022] [Revised: 02/17/2023] [Accepted: 02/23/2023] [Indexed: 03/03/2023]
Abstract
The multiple requirements of optical transmittance, high shielding effectiveness, and long-term stability bring considerable challenge to electromagnetic interference (EMI) shielding in the fields of visualization windows, transparent optoelectronic devices, and aerospace equipment. To this end, attempts were hereby made, and based on high-quality single crystal graphene (SCG)/hexagonal boron nitride (h-BN) heterostructure, transparent EMI shielding films with weak secondary reflection, nanoscale ultra-thin thickness and long-term stability were finally realized by a composite structure. In this novel structure, SCG was adopted as the absorption layer, while sliver nanowires (Ag NWs) film acted as the reflection layer. These two layers were placed on different sides of the quartz to form a cavity, which achieved the dual coupling effect, so that the electromagnetic wave was reflected multiple times to form more absorption loss. Among the absorption dominant shielding films, the composite structure in this work demonstrated stronger shielding effectiveness of 28.76 dB with a higher light transmittance of 80.6%. In addition, under the protection of the outermost h-BN layer, the decline range of the shielding performance of the shielding film was extensively reduced after 30 days of exposure to air and maintained long-term stability. Overall, this study provides an outstanding EMI shielding material with great potential for practical applications in electronic devices protection.
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Affiliation(s)
- Zhen Su
- School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150080, China; Key Laboratory of Micro-systems and Micro-structures, Manufacturing of Ministry of Education (MOE), Harbin Institute of Technology, Harbin 150080, China
| | - Huihui Yang
- School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150080, China; Key Laboratory of Micro-systems and Micro-structures, Manufacturing of Ministry of Education (MOE), Harbin Institute of Technology, Harbin 150080, China.
| | - Gang Wang
- Department of Physics, Southern University of Science and Technology, Shenzhen 518055, China
| | - Yilei Zhang
- Ultra-precision Optical & Electronic Instrument Engineering Center, Harbin Institute of Technology, Harbin 150080, China
| | - Jia Zhang
- Key Laboratory of Micro-systems and Micro-structures, Manufacturing of Ministry of Education (MOE), Harbin Institute of Technology, Harbin 150080, China
| | - Junhao Lin
- Department of Physics, Southern University of Science and Technology, Shenzhen 518055, China
| | - Dechang Jia
- School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150080, China
| | - Heyan Wang
- Ultra-precision Optical & Electronic Instrument Engineering Center, Harbin Institute of Technology, Harbin 150080, China
| | - Zhengang Lu
- Ultra-precision Optical & Electronic Instrument Engineering Center, Harbin Institute of Technology, Harbin 150080, China
| | - PingAn Hu
- School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150080, China; Key Laboratory of Micro-systems and Micro-structures, Manufacturing of Ministry of Education (MOE), Harbin Institute of Technology, Harbin 150080, China.
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8
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Comparative Study on Preparation Methods for Transparent Conductive Films Based on Silver Nanowires. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27248907. [PMID: 36558040 PMCID: PMC9781453 DOI: 10.3390/molecules27248907] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Revised: 12/02/2022] [Accepted: 12/10/2022] [Indexed: 12/23/2022]
Abstract
Silver nanowires, which have high optoelectronic properties, have the potential to supersede indium tin oxide in the field of electrocatalysis, stretchable electronic, and solar cells. Herein, four mainstream experimental methods, including Mayer-rod coating, spin coating, spray coating, and vacuum filtration methods, are employed to fabricate transparent conductive films based on the same silver nanowires to clarify the significance of preparation methods on the performance of the films. The surface morphology, conductive property, uniformity, and flexible stability of these four Ag NW-based films, are analyzed and compared to explore the advantages of these methods. The transparent conductive films produced by the vacuum filtration method have the most outstanding performance in terms of surface roughness and uniformity, benefitting from the stronger welding of NW-NW junctions after the press procedure. However, limited by the size of the membrane and the vacuum degree of the equipment, the small-size Ag films used in precious devices are appropriate to obtain through this method. Similarly, the spin coating method is suited to prepare Ag NWs films with small sizes, which shows excellent stability after the bending test. In comparison, much larger-size films could be obtained through Mayer-rod coating and spray coating methods. The pull-down speed and force among the Mayer-rod coating process, as well as the spray distance and traveling speed among the spray coating process, are essential to the uniformity of Ag NW films. After being treated with NaBH4 and polymethyl methacrylate (PMMA), the obtained Ag NW/PMMA films show great potential in the field of film defogging due to the Joule heating effect. Taken together, based on the advantages of each preparation method, the Ag NW-based films with desired size and performances are easier to prepare, meeting the requirements of different application fields.
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9
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Xiao N, Chen Y, Weng W, Chi X, Chen H, Tang D, Zhong S. Mechanism Understanding for Size Regulation of Silver Nanowires Mediated by Halogen Ions. NANOMATERIALS 2022; 12:nano12152681. [PMID: 35957112 PMCID: PMC9370693 DOI: 10.3390/nano12152681] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/07/2022] [Revised: 07/29/2022] [Accepted: 08/01/2022] [Indexed: 02/01/2023]
Abstract
The controllable preparation of silver nanowires (AgNWs) with a high aspect ratio is key for enabling their applications on a large scale. Herein, the aspect ratio regulation of AgNWs mediated by halogen ion composition in ethylene glycol system was systematically investigated and the size evolution mechanism is elaborately understood. The co-addition of Br− and Cl− results in AgNWs with the highest aspect ratio of 1031. The surface physicochemical analysis of AgNWs and the density functional theory calculations indicate that the co-addition of Br− and Cl− contributes to the much-enhanced preferential growth of the Ag(111) crystal plane. At the same time, when Cl− and Br− coexist in the solution, the growth of the Ag(100) crystal plane on the AgNWs was restrained compared with that in the single Cl− system. Resultantly, the enhanced growth of Ag(111) and the inhibited growth of Ag(100) contribute to the formation of AgNWs with a higher aspect ratio in the Cl–Br mixed solution. The results can provide new insights for understanding the morphology and size evolution during the AgNWs preparation in ethylene glycol system.
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Affiliation(s)
- Ni Xiao
- School of Materials Science and Engineering, Fuzhou University, Fuzhou 350108, China
| | - Yinan Chen
- Zijin School of Geology and Mining, Fuzhou University, Fuzhou 350108, China
| | - Wei Weng
- Zijin School of Geology and Mining, Fuzhou University, Fuzhou 350108, China
- Fujian Key Laboratory of Green Extraction and High-Value Utilization of Energy Metals, Fuzhou University, Fuzhou 350108, China
| | - Xiaopeng Chi
- Zijin School of Geology and Mining, Fuzhou University, Fuzhou 350108, China
- Fujian Key Laboratory of Green Extraction and High-Value Utilization of Energy Metals, Fuzhou University, Fuzhou 350108, China
| | - Hang Chen
- Zijin Mining Group Co., Ltd., Shanghang 364200, China
- State Key Laboratory of Comprehensive Utilization of Low Grade Refractory Gold Ores, Shanghang 364200, China
| | - Ding Tang
- Zijin Mining Group Co., Ltd., Shanghang 364200, China
- State Key Laboratory of Comprehensive Utilization of Low Grade Refractory Gold Ores, Shanghang 364200, China
| | - Shuiping Zhong
- Zijin School of Geology and Mining, Fuzhou University, Fuzhou 350108, China
- Fujian Key Laboratory of Green Extraction and High-Value Utilization of Energy Metals, Fuzhou University, Fuzhou 350108, China
- Zijin Mining Group Co., Ltd., Shanghang 364200, China
- State Key Laboratory of Comprehensive Utilization of Low Grade Refractory Gold Ores, Shanghang 364200, China
- Correspondence: ; Tel.: +86-152-8038-5768
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10
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Li S, Tian X, Wang J, Ma L, Li C, Qin Z, Qu S. Design and synthesis of composite films with excellent microwave absorption performance using polydimethylsiloxane as flexible frame. POLYM ADVAN TECHNOL 2022. [DOI: 10.1002/pat.5798] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Songyan Li
- Shaanxi Key Laboratory of Artificially‐Structured Functional Materials and Devices Air Force Engineering University Xi'an China
- Fundamentals Department Air Force Engineering University Xi'an China
| | - Xiaoxia Tian
- Shaanxi Key Laboratory of Artificially‐Structured Functional Materials and Devices Air Force Engineering University Xi'an China
- Fundamentals Department Air Force Engineering University Xi'an China
| | - Jiafu Wang
- Shaanxi Key Laboratory of Artificially‐Structured Functional Materials and Devices Air Force Engineering University Xi'an China
- Fundamentals Department Air Force Engineering University Xi'an China
| | - Lisi Ma
- Fundamentals Department Air Force Engineering University Xi'an China
| | - Chenchen Li
- Shaanxi Key Laboratory of Artificially‐Structured Functional Materials and Devices Air Force Engineering University Xi'an China
- Fundamentals Department Air Force Engineering University Xi'an China
| | - Zhe Qin
- Shaanxi Key Laboratory of Artificially‐Structured Functional Materials and Devices Air Force Engineering University Xi'an China
- Fundamentals Department Air Force Engineering University Xi'an China
| | - Shaobo Qu
- Shaanxi Key Laboratory of Artificially‐Structured Functional Materials and Devices Air Force Engineering University Xi'an China
- Fundamentals Department Air Force Engineering University Xi'an China
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11
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Low Cost Embedded Copper Mesh Based on Cracked Template for Highly Durability Transparent EMI Shielding Films. MATERIALS 2022; 15:ma15041449. [PMID: 35207987 PMCID: PMC8879047 DOI: 10.3390/ma15041449] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/26/2021] [Revised: 01/31/2022] [Accepted: 02/06/2022] [Indexed: 02/05/2023]
Abstract
Embedded copper mesh coatings with low sheet resistance and high transparency were formed using a low-cost Cu seed mesh obtained with a magnetron sputtering on a cracked template, and subsequent operations electroplating and embedding in a photocurable resin layer. The influence of the mesh size on the optoelectric characteristics and the electromagnetic shielding efficiency in a wide frequency range is considered. In optimizing the coating properties, a shielding efficiency of 49.38 dB at a frequency of 1 GHz, with integral optical transparency in the visible range of 84.3%, was obtained. Embedded Cu meshes have been shown to be highly bending stable and have excellent adhesion strength. The combination of properties and economic costs for the formation of coatings indicates their high prospects for practical use in shielding transparent objects, such as windows and computer monitors.
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12
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Zhao Y, Hao L, Zhang X, Tan S, Li H, Zheng J, Ji G. A Novel Strategy in Electromagnetic Wave Absorbing and Shielding Materials Design: Multi‐Responsive Field Effect. SMALL SCIENCE 2021. [DOI: 10.1002/smsc.202100077] [Citation(s) in RCA: 84] [Impact Index Per Article: 28.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Affiliation(s)
- Yue Zhao
- College of Materials Science and Technology Nanjing University of Aeronautics and Astronautics Nanjing 211100 P. R. China
| | - Lele Hao
- College of Materials Science and Technology Nanjing University of Aeronautics and Astronautics Nanjing 211100 P. R. China
| | - Xindan Zhang
- College of Materials Science and Technology Nanjing University of Aeronautics and Astronautics Nanjing 211100 P. R. China
| | - Shujuan Tan
- College of Materials Science and Technology Nanjing University of Aeronautics and Astronautics Nanjing 211100 P. R. China
| | - Haohang Li
- College of Materials Science and Technology Nanjing University of Aeronautics and Astronautics Nanjing 211100 P. R. China
| | - Jing Zheng
- Department of Chemistry and Materials Science College of Science Nanjing Forestry University Nanjing 210037 P. R. China
| | - Guangbin Ji
- College of Materials Science and Technology Nanjing University of Aeronautics and Astronautics Nanjing 211100 P. R. China
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Koylan S, Tunca S, Polat G, Durukan MB, Kim D, Kalay YE, Ko SH, Unalan HE. Highly stable silver-platinum core-shell nanowires for H 2O 2 detection. NANOSCALE 2021; 13:13129-13141. [PMID: 34477796 DOI: 10.1039/d1nr01976g] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Silver nanowire (Ag NW) networks have great potential to replace commercial transparent conducting oxides due to their superior properties in conjunction with their competitive cost, availability and mechanical flexibility. However, there are still challenges to overcome for the large scale utilization of Ag NWs in devices due to oxidation/sulfidation of NWs, which leads to performance loss. Here, we develop a solution-based strategy to deposit a thin platinum (Pt) shell layer (15 nm) onto Ag NWs to improve their chemical, environmental and electrochemical stabilities. Environmental and thermal stabilities of the core-shell NW networks were monitored under different relative humidity conditions (RH of 43, 75 and 85%) and temperature settings (75 °C for 120 hours and 150 °C for 40 hours) and compared to those of bare Ag NWs. Afterwards, stability of core-shell NW networks in hydrogen peroxide was investigated and compared to that of bare Ag NW networks. The potential window for electrochemical stability of the Ag NW networks was broadened to 0-1 V (vs. Ag/AgCl) upon Pt deposition, while bare Ag NWs were stable only in the 0-0.6 V range. Moreover, Ag-Pt core-shell NWs were used for the detection of hydrogen peroxide, where a high sensitivity of 0.04 μA μM-1 over a wide linear range of concentrations (16.6-990.1 μM) with a low detection limit (10.95 μM) was obtained for the fabricated sensors. All in all, this highly effective and simple strategy to improve the stability of Ag NWs will certainly open new avenues for their large-scale utilization in various electrochemical and sensing devices.
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Affiliation(s)
- Serkan Koylan
- Department of Metallurgical and Materials Engineering, Middle East Technical University (METU), 06800, Ankara, Turkey.
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