ACS Applied Materials & Interfaces
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2023
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IF 9.5
Jiakai Zeng,Liuqing Yang,Wenfeng Liu,Hongbo Liu,Yan Zhang,Zhuofan Li,Xia Liu,Xiaohong Chi,Lu Cheng,Shengtao Li
Dielectric materials with high surface electric insulation strength are in great demand in a high-power space solar cell array (SSCA). A moderately conductive surface is favorable to inhibit charge accumulation and mitigate electric field distortion, thus improving the surface flashover voltage. Although numerous modification methods have been proposed to achieve this goal, the facile, efficient, scalable, and environmentally friendly modification strategy remains a critical challenge to date. Considering the excellent charge modulation ability of ZnO and its mild preparation conditions, a facile and economical hydrothermal strategy was proposed to fabricate in situ a durable poly(ether imide)/zinc oxide (PEI/ZnO) coating with a high charge decay rate. The blooming flower-like ZnO in the coating is proved to play a key role in enhancing lateral charge dissipation on the surface of PEI, thereby suppressing surface charge accumulation. It was also shown that the shielding effect of ZnO on high-energy photons during flashover and the catalytic effect of Zn2+ on PEI molecular chains during hydrothermal treatment had a facilitating and suppressing effect on outgassing, respectively, and consequently affected the flashover. Excitingly, the synergistic effects of both accelerated charge dissipation and suppressed outgassing helped to improve the flashover voltage of PEI by up to 36.7%. The strategy selected here is efficient, scalable, and facile, and the coating is durable, which makes sense for commercial promotion.
研究领域:
材料科学
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电气工程
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空间技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
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2025
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IF 19
Mei Yu,Haoshi Zhang,Qianhengyuan Yu,Jianping Huang,Hanfei Li,Hang Zhao,Zijian Yang,Fei Han,Jing Sun,Bowen Gu,Guangfa Xiang,Chenyang Li,Huan Yu,Wen Hou,Yang Zhao,Qiong Tian,Guanglin Li,Zhiyuan Liu,Qingsong Li
Luminal organs such as the gastrointestinal tract, auditory canal, and urogenital tract exhibit complex, folded, and dynamic architectures, presenting significant challenges for stable and conformal electrophysiological monitoring. Conventional soft electrodes, while effective on flat surfaces, often fail to adapt to the deep-seated, narrow, and irregular environments of endoluminal tissues. Here, a balloon electrode incorporating a semi-embedded Ag–Au core–shell nanowire (Ag@AuNW) composite is developed to enable active and reversible interfacing with endoluminal tissues of various sizes. The Ag@AuNW composite is fabricated using tape-assisted masking and vacuum filtration, followed by partial embedding in elastomer to form a percolated conductive network with high conductivity, mechanical durability, chemical stability, and omnidirectional stretchability (600% area strain). When integrated onto a catheter, the balloon electrode undergoes a reversible tubular-to-balloon transformation during inflation, actively expanding to conform to folded tissue surfaces and reduce interfacial impedance. It maintains stable electro-mechanical performance over 1000 inflation-deflation cycles. For proof-of-concept, the device is deployed into human ear canals and rabbit vaginas, where it achieves conformal adaptation and enables the acquisition of high-quality electroencephalography (EEG) and electromyography (EMG) signals, outperforming conventional electrodes. These results highlight the potential of an omnidirectionally stretchable balloon electrode for minimally invasive, high-fidelity electrophysiological monitoring within complex luminal organs.
研究领域:
生物医学工程
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柔性电子学
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可穿戴传感器
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电生理学
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软体机器人
✓ 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）