ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Lei Liu,Cheng Wang,Ze Wu,Youqiang Xing
The main challenge in manufacturing an ionic actuator of large bending displacement and great response sensitivity is to design a flexible electrode with great electrochemical characteristics and conductivity. This research reports the MXene-PEDOT:PSS/AgNWs (MPA) electrode with a three-dimensional (3D) network structure formed by a hybrid method of the one-dimensional (1D) silver nanowires (AgNWs) and the two-dimensional (2D) Ti3C2Tx MXene. Here, a soft actuator based on the ionic cross-linked hybrid electrode was designed. The results show that the MPA electrode-based soft actuator achieves a large bending strain (0.48%, ±0.5 V sine voltage), wide frequency (0.1–10 Hz), 5 h durability (91.9% retention), fast response time (≈5 s), great power density (7.53 kW m–3), and great energy density (18.83 kJ m–3). These excellent performances contribute to the 3D structure of electrodes formed by MXene and AgNWs creating an unhindered ion channel, which facilitates short diffusion and rapid injection of ions and provides higher capacitance and mechanical integrity. This 3D network layered structure hybrid electrode provides an opportunity for the development of ultralow-voltage-drivable artificial muscles.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2022
·Vol. 57
·期 43
·20210-20223
·
IF 4.682
Wang Ruo-tian,Xiong Sang
Nano-WO 3 :EU 3+ powder was prepared by Pechini method under acidic and alkaline condition, and the prepared acidic nano-WO 3 :Eu 3+ mixed with the silver nanowires (AgNWs) in ethanol and acetone solution. The solution was mixed with PMMA and EP, respectively. Then, drops of the solutions were added to the indium tin oxide (ITO) conductive glass as the substrate; a AgNWs/WO 3 :Eu 3+ composite film was obtained with spin coating by spin coater and solidification process. Microstructure, morphology, optical properties, preparation process and UV transmittance of the prepared nano-WO 3 :Eu 3+ and AgNWs/WO 3 :Eu 3+ composite films were investigated by XRD, SEM, fluorescence spectroscopy and UV spectrophotometer. The results show that the prepared acidic nano-WO 3 is triclinic, and the average particle size is 71.63 nm. The prepared alkaline nano-WO 3 is monoclinic, with an average particle size of 95.66 nm. Both of them have good luminescence properties. Under different monitoring wavelengths, in the emission range of 450–500 nm, it belongs to the green light region, and its excitation peak is the largest, indicating that green light is the best excitation light source for WO 3 :Eu 3+ powder. The transmittance of EP/AgNWs/WO 3 :Eu 3+ composite film is the highest when the spin coating time is more than 30 s and above 3000 rpm, no more than three layers spin coating and the content of curing agent is between 0.1 and 0.2 g.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2024
·
IF 8.3
Fan Xie,Qiaoling Liu,Xiyi Dai,Haitao Wei,Zhaoqing Lu
Multi-functional electromagnetic interference (EMI) shielding materials are crucial for advanced electronic devices, requiring low thickness, exceptional shielding performance, and stability, especially in extreme conditions. In this study, the hollow sandwich MXene/h-AgNWs/ANF (AMAgMA) composite films were fabricated via template sacrificing method and layer-by-layer vacuum assisted filtration. Specifically, the hollow MXene was created using PMMA as the template, together with AgNWs for the conductive layer, while ANF provided stability and high temperature resistance as the protective layer. The optimized EMI shielding efficiency (SE) reached 88.2 dB for a film thickness of 93 μm, with an SSE/t value of 18160 dB cm 2 ·g −1 , which was attributed to the hollow structure and continuous double conductive network design. Remarkably, EMI SE of the films maintained even after 70 days of exposure to oxidation, acid, alkali, salt, and ultrasonic treatment thanks to the sandwich design. Additionally, the composite films displayed excellent heat transfer and thermal stability (530 °C), alongside notable flame retardancy and self-extinguishing properties. The superior EMI shielding performance and stability in extreme environments suggest a promising application potential in advanced electronics.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2018
·
IF 2.829
Zhou Zhou,Hao Wang,Zhicai Zhu,Hui Yang,Qilong Zhang
This paper reports a feasible method to prepare polymeric nanocomposites with enhanced dielectric, electromechanical and hydrophobic performance by introducing the core-shell AgNWs@SiO 2 filler into polydimethylsiloxane (PDMS). The homogenous core-shell AgNWs@SiO 2 was firstly synthesized through a two-step sol-gel process. The thicknesses of AgNWs and SiO 2 coating layer are approximately 70 nm and 20 nm, respectively. The dielectric constant is improved effectively due to enhanced interfacial polarization, while extremely low dielectric loss and conductivity are achieved by introducing the insulating SiO 2 interlayer to moderate the internal surface area of core-shell nanowires and restrict the electron transfer between Ag nanowires. Typically, the PDMS nanocomposites with 20 wt% AgNWs@SiO 2 have a dielectric constant of 6.7, nearly 2.7 times larger than that of pure PDMS, and remains a quite low loss of 0.02 at 1 kHz. Meanwhile, nanocomposites also show improved electromechanical and hydrophoic properties. Nanocomposites with 10 wt% AgNWs@SiO 2 exhibit the highest electromechanical sensitivity ( β= 9.04), about 12.6 times higher than that of pure PDMS at 1 kHz. The static contact angle of nanocomposties with 20 wt% AgNWs@SiO 2 reaches 129°. All the improved performances show great potential application for dielectric elastomer material and electrowetting devices.
研究领域:
材料科学
·
电气工程
✓ 已验证
DOI
高影响因子
Polymers
·
2024
·Vol. 16
·期 6
·760
·
IF 4.7
Xiaoshuai Han,Hongyu Feng,Wei Tian,Kai Zhang,Lei Zhang,Jiangbo Wang,Shaohua Jiang
A thin, lightweight and flexible electromagnetic interference (EMI) shielding paper composite is an urgent need for modern military confrontations. Herein, a sandwich-structured EMI shielding paper composite with an easy pavement consisting of a filter paper layer, middle AgNWs/MXene layer, and polyvinyl butyral (PVB) layer was constructed by vacuum-assisted filtration, spraying and air-drying. The middle AgNWs/MXene compound endowed the filter paper with excellent electrical conductivity (166 S cm−1) and the fabricated filter paper–AgNWs/MXene–PVB composite exhibits superior EMI shielding (30 dB) with a 141 μm thickness. Remarkably, the specific EMI shielding effectiveness (SSE/t) of the filter paper–AgNWs/MXene–PVB composite reached 13,000 dB cm2g−1within the X-band frequency range. This value represents one of the highest reported for cellulose-based EMI shielding materials. Therefore, our sandwich-structured filter paper composite with superior EMI shielding performance can be used in the medical and military fields.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Surfaces and Interfaces
·
2025
·
IF 6.3
Ze-Long Bao,Wen-Hao Geng,Song-Yi Zhang,Peng-Fei Qian,Li-Chao Jing,Xuan-Chen Liu,Tong-Yu Li,Yu-Long Guo,Ru-Yu Chang,Hong-Zhang Geng
Ubiquitous electromagnetic waves have a negative effect on precision instruments and damage human health. Therefore, multifunctional and versatile flexible transparent conductive films, which can solve the challenge of microelectronic device encapsulated and protected in harsh conditions (e.g., extreme temperature) in specific scenarios, are demanded to process electromagnetic shielding and electric heating properties. Herein, AgNWs/MXene@Ni/PET films were fabricated by MXene template-guided electrochemical deposition of nickel nanosphere as flexible transparent conductive films. The films exhibit excellent optoelectrical properties (9.8 Ω/sq @ transparency 80.3%), splendid EMI shielding performances (35.1 dB), outstanding electric heating performance (85°C at 4 V), and rapid heating capability (reaching the saturation temperature with 40 s), which are potential to be widely applied under the complex surrounding as electromagnetic shielding and electric heating. Noticeably, nickel nanosphere are regarded as resistor-capacitor circuit model on the surface of MXene, forming the structure of the capacitor. Furthermore, magnetic nickel nanospheres have synergistic effect with dielectric MXene and AgNWs, defined Dielectric-Magnetic-Dielectric synergistic absorption. In addition, Ni nanosphere generate dielectric dipole interactions with MXene, to enhance the capability of absorbing EMW. Finally, this work has the potential to be conducive to practical and commercial applications as flexible transparent electromagnetic interference and electric heating devices.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
POLYMER
·
2024
·
IF 4.1
Yongjing Fu,Huijia Wang,Chuan Zhou,Yiming Wang,Ni Li
Heat insulation and solar energy use are attractive strategies to cope with the serious and external cold environment. Here, silver nanowires (AgNWs) with high purity and aspect ratio were synthesized by polyol method and PVDF/AgNWs nanofiber membranes were prepared by electrostatic spinning. We investigated the warmth retention properties of nanofiber membranes using a heating table and simulated sunlight as the heat source, respectively. The results showed that the nanofiber membrane doped with 2 wt % AgNWs had a high porosity of 84% and thus a low thermal conductivity of 18 mW m −1 K −1 . Meanwhile the nanofiber membrane exhibited stable and long-lasting heat insulation behaviors and the surface temperature of the fiber membrane could reach nearly 43 °C after 5 min of irradiation with a 100 mW cm −2 light intensity and about 70 °C after 2 min of irradiation with a 300 mW cm −2 light intensity. In addition, the nanofiber membrane showed hydrophobicity with a water contact angle of 138° and breathability with air permeability of 75 mm s −1 . The stress and strain of the nanofiber membrane was 3.6 Mpa and 211.3% respectively.
研究领域:
材料科学
·
能源科学
✓ 已验证
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2023
·Vol. 33
·期 51
·2305531
·
IF 19
Renhou Han,Yue Liu,Yepei Mo,Huichen Xu,Zhengwen Yang,Rongrong Bao,Caofeng Pan
Flexible capacitive pressure sensors play an important role in electronic skin and human–machine interaction due to their high sensitivity and convenient preparation, comparing with those resistive/piezoresistive sensors. However, due to the complexity of the application environment, reported capacitive sensors often experience signal instability by electromagnetic interference and proximity effects. The great challenge for capacitive sensors is to maintain sensitivity and wide linear range while reducing interference. This study proposes a high anti-jamming capacitive flexible pressure sensor with polyvinylidene fluoride (PVDF)@AgNWs@TiO 2 film as the dielectric layer. Core–shell structure-based AgNWs@TiO 2 is embedded into the PVDF film. The introduction of the core–shell structure not only enhances the initial capacitance but also balances the dielectric constant, dielectric loss, and breakdown strength of the dielectric layer. The sensor is validated to exhibit a high signal-to-noise ratio for a variety of interference sources and is demonstrated with an intelligent glove sensing system, which provides a new idea for developing a high anti-jamming capacitive flexible pressure sensor.
研究领域:
材料科学
·
电子皮肤技术
·
人机交互
✓ 已验证
产品关联
DOI
高影响因子
Electronic Materials Letters
·
2024
·
IF 2.1
Yao Yubo,Dai Hongfei,Ji Mengnan,Han Ying,Jiang Bo,Cheng Chi,Song Xiaolei,Song Ying,Wu Guangfeng
Flexible strain sensors that combine high sensitivity and wide range are important for developing wearable electronics. In this paper, AgNWs/MXene/SEBS flexible strain sensor with high sensitivity and wide strain range was prepared using a thermoplastic elastomer (styrene-ethylene-butene-styrene) SEBS as the polymer matrix and AgNWs and MXene as the composite conductive fillers. The sensitivity of the AgNWs/MXene/SEBS sensor is significantly higher than that of the AgNWs/SEBS and MXene/SEBS sensors based on a single conductive filler. At 100% strain, the AgNWs/MXene/SEBS sensor has a sensitivity of 176.25. The sensor detects small strains of 0.5-5% as well as large strains of 5–50% with high linearity. The sensors remained stable after 200 cycles. The AgNWs/MXene/SEBS tensile sensors were subjected to array testing and finger bending recognition, and the sensors have promising applications in human motion monitoring. Graphical Abstract
研究领域:
材料科学
·
传感器技术
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Guojun Chang,Lingjun Zeng,Lan Xie,Bai Xue,Qiang Zheng
Harsh freezing and high-humidity environments lay down paramount bottlenecks for the utilization prospect of polymeric electromagnetic interference (EMI) shielding materials. Herein, ultrathin and flexible multifunctional EMI shielding MXene/Ag nanowires/poly(3, 4-ethylene dioxythiophene):polystyrene sulfonate (MXene/AgNWs/PEDOT:PSS) composite coatings were fabricated via the facile drop-casting of MXene/AgNWs/PEDOT:PSS mixture dispersion and subsequent hydrophobic spraying modification. Profited by the superior electrical conductivity of both polymer host and filler guests, MXene/AgNWs/PEDOT:PSS coatings exhibit the preeminent EMI shielding effectiveness (SE) of 31.5 dB at a rather small thickness of 10 µm, far surpassing that of most the reported polymer-based EMI shielding composites at the similar thickness. Moreover, MXene/AgNWs/PEDOT:PSS coatings also hold excellent electro/photo-thermal transition ability and fascinating water repellency, which ensures their normal application on cold and damp conditions. Interestingly, the intensive interlocking effect of 1 D AgNWs and 2 D MXene allows the wonderful interfacial adhesion and mechanical durability of MXene/AgNWs/PEDOT:PSS coatings. This study provides a valuable insight into the design and construction of multifunctional polymeric coatings for EMI shielding of high-power and high-frequency electronics in cold and high-humidity environments.
研究领域:
材料科学
·
电子工程
✓ 已验证
DOI
高影响因子
RSC Advances
·
2023
·Vol. 13
·期 41
·28613-28622
·
IF 3.9
Yujun Ji,Gangqiang Tang,Chun Zhao,Xin Zhao,Dong Mei,Yifan Pan,Yanjie Wang
In the past decade, the development of medical health and human–computer interfaces has put forward requirements for the non-contact application of flexible electronics. Among them, flexible humidity sensors play an important role in the field of non-contact sensing by virtue of their rapid response to humidity changes. In this paper, a flexible paper-based humidity sensor with high performance was fabricated by embedded Au@AgNWs electrodes on filter paper through spraying and electroplating (EP) methods. Benefitting from the moisture-sensitive properties of the paper and the tight integration of the electrodes into the filter paper, the sensor shows the humidity monitoring range of 33–100% RH, large response value of I/I0 = 1958, excellent linearity of R2 = 0.99662 and hysteresis performance under the low excitation voltage of only DC 1 V. In addition, the good biocompatibility of the paper-based humidity sensor endows it with multifunctional applications for breath detection, non-contact applications and food security monitoring. Easy access to raw materials and convenient preparation methods of this work provide new ideas for the development and commercialization of flexible humidity sensors.
研究领域:
柔性电子
·
传感器
·
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COMPOSITES PART B-ENGINEERING
·
2021
·
IF 9.078
Xiaopeng Han,Ying Huang,Jiaming Wang,Guozheng Zhang,Tiehu Li,Panbo Liu
Flexible microwave absorption (MA) materials with high thermal conductivities and electric-thermal performances have promising applications in the wearable electronics and artificial intelligence fields. Herein, multifunctional and flexible ZnO/carbon cloth (CC@ZnO) films with effective MA performance were prepared using a typical hydrothermal method . The flexible CC@ZnO-3 film displays high reflection loss (R L ) values of - 47.3 dB at 2.5 mm and broadest effective absorption bandwidth (EAB) of 4.0 GHz in the whole X band for the construction of 3D ZnO arrays and 2D CC matrix. Moreover, CC@ZnO-3 film was coated silver nanowires (AgNWs) solution to fabricate CC@ZnO/AgNWs/PVA (CAP) films with a highly conductively network. As a consequence, CC matrix and AgNWs conductive network contribute CAP with low voltages driven Joule heating performance, which ensure the functional integrity under extreme conditions. Therefore, our fabrications have potential applications in the fields of MA and the protection of wearable electronics.
研究领域:
材料科学
·
电子工程
✓ 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）