MATERIALS CHEMISTRY AND PHYSICS
·
2025
·
IF 4.7
Weimin Yan,Chengmin Hou
Flexible electronics demand conductive films with high stability and conductivity. However, silver nanowires (AgNWs) face challenges like agglomeration and inconsistent morphology. In this study, AgNWs were synthesized via a two-step process: (1) preliminary growth using a glass fiber template and polyol method (diameter: 0.2–0.4 μm, length: 1–6 μm), and (2) secondary growth by mixing AgNWs with PVA solution followed by heat treatment. The secondary growth enhanced nanowire dimensions (diameter: 5–7 μm, length: 100–200 μm) and conductivity. The optimized film exhibited stable resistance (4 MΩ) after 5000 bends (90° and 180°) and achieved optimal performance at 100 °C/30 min. This method provides a scalable solution for flexible electronics.
研究领域:
材料科学
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
CELLULOSE
·
2024
·Vol. 31
·期 18
·11065-11085
·
IF 4.9
Kang Jiahao,Zhao Qiangli,Mao Min,Mu Qiang,Zhao Xiaoliang,He Xinhai,Li Jianwei
Electroactive biomass materials based on chitosan (CS), cellulose, etc. have great potential for applications in non-contact switches, smart wearable devices, environmental monitoring, etc. However, due to low electroactivity and susceptibility to overhydration, it is necessary to add carbon materials, synthetic conductive polymers or metal oxides, etc. and introduce numerous chemical crosslinking, which makes them face the problems of poor filler-matrix dispersion, high preparation cost and environmental pollution. In this study, citrate-modified cellulose (EMC) was prepared and introduced into the CS matrix, and a multi network structure with hydrogen bonding, chemical crosslinking and ionic complexation crosslinking was constructed by adding chemical crosslinking and Cu 2+ ion complexation. Flexible conductive composite film (CS-EMC-Cu film) and paper (CS-EMC-Cu impregnated paper) were prepared. The results showed that the incorporation of Cu 2+ and EMC effectively improved the flexibility (elongation at break of 106%), water resistance and surface hydrophilicity of the films. The composite conductive film (conductivity of 0.277 S/m) has good wet-responsive deformation properties, can be used as a non-contact smart switch, and has good humidity (0.745 RH −1 ) and pressure sensing properties, but the durability still needs to be improved. The CS-EMC-Cu impregnated conductive paper (conductivity of 0.0737 S/m) has good flexibility (elongation at break of 7.9%) and water resistance, and is capable of lighting a light bulb. Its brightness is enhanced with humidity and has good wet response characteristics. This flexible conductive film and paper are prepared in an environmentally friendly way, which provides ideas for the preparation and design of biomass-based flexible sensors, and is also of great significance for the high value-added utilization of biomass materials.
研究领域:
材料科学
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生物工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS & DESIGN
·
2019
·
IF 5.77
Yun Mou,Hao Wang,Yang Peng,Jiaxin Liu,Hao Cheng,Qinglei Sun,Mingxiang Chen
Poor flexibility and high contact resistance of conductive films are primary roadblock for the incorporation of Ag flake ink into practical applications. In this work, a novel and inexpensive Ag flake/ion composite ink was prepared to directly achieve the thick conductive films with excellent performances at 100 °C. The effect of Ag ion content on the resistivity and microstructures of the modified conductive film was investigated, and the flexibility and relative resistance change of the modified conductive film were measured by the cyclic bending test and compared with the traditional Ag flake ink. Consequently, the modified conductive film sintered from Ag flake/ion-0.5 in. exhibits low electrical resistivity of 4.83 × 10 −5 Ω·cm, which is 42.9% lower than the Ag flake film sintered from the Ag flake ink, and the modified conductive film still displays smaller changes in resistivity and relative resistance after the cyclic bending tests. The enhanced conductivity and flexibility are attributed to the bridging effect of Ag nanoparticles (NPs) generated from the in–situ decomposition of Ag ion ink. These results demonstrate that the low-cost Ag flake/ion composite ink provides a tempting prospect for fabricating high-quality flexible printed electronics at low temperature.
研究领域:
材料科学
·
电子工程
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Wenwu Zhang,Yanhong Zhou,Yiping Ding,Linlin Song,Qunhui Yuan,Weiwei Zhao,Chengyan Xu,Jun Wei,Mingyu Li,Hongjun Ji
Metallic conductive nanoink with the sensitivity of temperature, oxygen, and electrochemical migration is a great challenge for printed electronics. Here, the size-controllable Cu@Ag core–shell nanoparticles (NPs) conductive films with effective cost, excellent electrical conductivity, high electrochemical migration (ECM) and oxidation resistance were obtained successfully. The novel mechanism of lower temperature sintering for Cu@Ag NPs was proposed due to radius of curvature between a large amount of tiny Ag nanobumps generated by ‘dewetting’ behavior. The Cu@Ag NPs also exhibited extreme ECM and oxidation resistance. It could remain steady in air for 40 days and hardly oxide at a high temperature of 156℃, and its failure time of ECM was 4.6 times higher than that of Ag NPs. Besides, the resistivity was up to 3.21 μΩ∙cm (55% of the bulk conductivity of Cu) even sintered at 140 °C, which enjoyed a great advantage. Ultimately, serial flexible organic light emitting diodes were integrated by high precision inkjet printing, and their excellent bending resistance and printable performance were fully exhibited. Accordingly, integrating the advantages of controllable nanoscale, lower temperature sintering, optimized conductivity, high antioxidation, excellent ECM resistance, flexibility, and printability, we enlighten the practical applications of flexible printed electronics.
研究领域:
材料科学
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纳米技术
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电子工程
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
·
IF 5.4
Yubin Li,Guoliang Dai,Jie Fan,Hong Xiao
Visible light transparent and low infrared emission materials have great prospects in infrared camouflage, building energy efficiency, passive radiation heating and many other fields, yet their manufacture remains a formidable challenge. inspired by the overlap of branches and fallen leaves in winter, we applied bionic principles to build a conductive network combining AgNWs and MXene on a transparent PET substrate, and developed an optically transparent, infrared-low-emission flexible conductive film. The prepared MA 10/133 film has a visible light transmittance of not less than 71 %, a sheet resistance of 12.03Ω·sq −1 , and average emissivities of 0.37 and 0.18 in two infrared atmospheric windows of 3–5 μm and 8–14 μm, and demonstrates excellent visible transparency and infrared camouflage performance. In addition, in the field of personal thermal management, with superior passive radiant heating performance, MA 10/133 film covered simulated human skin is 4.5°C and 1.5°C higher than those covered by cotton and woolen fabrics. Stable and controllable Joule heating performance can be used as an effective complement to passive radiant heating performance, with a maximum saturation temperature of 74.7°C at a driving voltage of 5 V, which is sufficient to cope with colder outdoor environments. These properties make composite films promising candidates for military thermal camouflage, outdoor life jackets and smart, energy-efficient windows.
研究领域:
材料科学
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光电子学
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红外技术
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仿生学
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热管理
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柔性电子学
✓ 已验证
产品关联
DOI
高影响因子
Advanced Composites and Hybrid Materials
·
2025
·Vol. 8
·期 6
·429
·
IF 21.8
Ma Shanshan,Liu Siqi,Yan Jifeng,Ren Bin,Yu Hang,Ma Zhaoyang,Sun Lina,Zhang Tengyang,Huo Jinpeng,Yang Yuhui,Fei Jie,Chae Sanghoon,He Chaobin,Li Hejun
The development of a multifunctional conductive film to meet the requirements of flexibility, high-strength and exceptional electromagnetic interference (EMI) shielding capacity in the electronic devices has attracted extensive attention. A strategy of hydrogel-induced ultra-fast protonation was proposed for preparing aramid nanofibers-transition metal carbonitrides-poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (ANF-MXene-PEDOT:PSS) conductive films. The ultra-fast protonation process would induce the formation of ultra-long molecular chains and the reconstruction of cross-linking networks to enhance the mechanical properties of films. The ultimate tensile strength of ANF-MXene-PEDOT:PSS (60%) film reached 233.6 MPa, showing an increase of 189.5%. Meanwhile, the encapsulation of conductive PEDOT:PSS layer effectively addressed the issues of the brittleness and highly oxidization susceptibility of MXene. The EMI shielding effectiveness of ANF-MXene-PEDOT:PSS (60%) film reached 45.7–48.2 dB from 8.2 to 26.7 GHz at a thickness of 36 μm. After a month for exposing to air, the EMI shielding capability of ANF-MXene-PEDOT:PSS (60%) film still remained stable (> 42.5 dB). This hybrid film also exhibited high conductivity (264.7 S·cm −1 ), self-cleaning, fire retardancy and joule heating properties, which was as an intelligent sensor to realize the real-time monitoring of human physiological signals. This work paves the way for large-scale production of next-generation high-performance EMI shielding films, demonstrating huge potential in electromagnetic protection, thermal management and intelligent wearable devices. Graphical
研究领域:
材料科学
·
电磁干扰屏蔽
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柔性电子学
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纳米复合材料
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可穿戴设备
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导电聚合物
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能源材料
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2019
·
IF 6.393
Jieping Cao,Qi An,Zhenping Liu,Mingliang Jin,Zhibin Yan,Weijie Lin,Lin Chen,Pengfei Li,Xin Wang,Guofu Zhou,Lingling Shui
Droplet manipulation is a critical step for microfluidic applications. We present digital microfluidic devices based on electrowetting-on-dielectric (EWOD) for reliable and repeatable droplet manipulation. The EWOD device consists of two flexible conductive films as top and bottom electrodes, and one flexible liquid-infused membrane (LIM) as the hydrophobic insulating layer. LIMs made by infusing various fluids (air, fluorocarbon, silicone and hydrocarbon oils) into polytetrafluoroethylene (PTFE) membranes are evaluated by electrowetting performance of a sessile water droplet. Silicone oil is selected as the filling insulating oil according to its excellent electrowetting performance in good reversibility, low contact angle hysteresis, and negligible volatility. Fast (85 mm⋅s −1 ), repeatable (>5000 times without obvious decay) and continuous droplet (designed routes) moving, merging, mixing and positioning have been demonstrated. The factors affecting droplet transport velocity are investigated, including the infused oil viscosity, the conductive volume and the top-to-bottom gap distance. Both the conductive film and LIM are replaceable and robust, showing reliable and long-term stability. Quantitative chromogenic reactions and a flexible EWOD device are demonstrated. These devices are easy-to-fabricate, replaceable-in-material and robust-in-performance, showing high potential for applications in sample preparation, and flexible sensing and display devices.
研究领域:
微流控
·
材料科学
·
电化学
·
生物医学工程
·
柔性电子
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）