المؤلفون: Shiyuan Wei, Anqi Jiang, Hongji Sun, Jingjun Zhu, Shengyi Jia, Xiaojun Liu, Zheng Xu, Jing Zhang, Yuanyuan Shang, Xuefeng Fu, Gen Li, Puxin Wang, Zhiyuan Xia, Tianzi Jiang, Anyuan Cao, Xiaojie Duan

المصدر: Nature Communications, Vol 15, Iss 1, Pp 1-16 (2024)

مصطلحات موضوعية: Science

الوصف: Abstract Large-scale brain activity mapping is important for understanding the neural basis of behaviour. Electrocorticograms (ECoGs) have high spatiotemporal resolution, bandwidth, and signal quality. However, the invasiveness and surgical risks of electrode array implantation limit its application scope. We developed an ultrathin, flexible shape-changing electrode array (SCEA) for large-scale ECoG mapping with minimal invasiveness. SCEAs were inserted into cortical surfaces in compressed states through small openings in the skull or dura and fully expanded to cover large cortical areas. MRI and histological studies on rats proved the minimal invasiveness of the implantation process and the high chronic biocompatibility of the SCEAs. High-quality micro-ECoG activities mapped with SCEAs from male rodent brains during seizures and canine brains during the emergence period revealed the spatiotemporal organization of different brain states with resolution and bandwidth that cannot be achieved using existing noninvasive techniques. The biocompatibility and ability to map large-scale physiological and pathological cortical activities with high spatiotemporal resolution, bandwidth, and signal quality in a minimally invasive manner offer SCEAs as a superior tool for applications ranging from fundamental brain research to brain-machine interfaces.

وصف الملف: electronic resource

العلاقة: https://doaj.org/toc/2041-1723Test

الوصول الحر: https://doaj.org/article/5c16700adc274b8bb207b92f8f089a23Test

المؤلفون: Weixue Meng, Jing Wang, Ding Zhang, Jie Xu, Fengmei Guo, Yingjiu Zhang, Rui Pang, Anyuan Cao, Yuanyuan Shang

المصدر: Small Structures, Vol 4, Iss 10, Pp n/a-n/a (2023)

مصطلحات موضوعية: amorphous carbon, carbon nanotube sponges, defect, hydrogen evolution reaction, ruthenium nanoparticles, Physics, QC1-999, Chemistry, QD1-999

الوصف: Compared with hydrogen evolution reaction (HER) under acidic conditions, the kinetic steps of alkaline HER are more complex, which involves the adsorption and cleavage of water molecules. Defect and interface engineering are two important means to enhance basic HER. In order to prepare catalysts with high activity and stability under both acidic and basic conditions, a defective amorphous carbon loaded with Ru nanoparticles coaxially wrapped around a carbon nanotube (CNT) sponge network is presented. The presence of amorphous carbon can promote the uniform loading of Ru nanoparticles and limit the growth of Ru nanoparticles, and also the introduction of oxygen defects can regulate the electronic structure of the metal and improve its charge transport capacity, thus enhancing the catalytic performance. The catalyst CNT/C/Ru0.37 wt%‐700 prepared under optimized conditions exhibits excellent stability and activity. At a current density of 10 mA cm−2, the overpotential of HER is as low as 38.3 and 36.2 mV under alkaline and acidic conditions, respectively, which is better than most reported Ru‐based catalysts. This study details innovative and feasible ideas for the design and preparation of loaded catalysts, which can contribute to the development of high‐performance electrochemical catalysts.

وصف الملف: electronic resource

العلاقة: https://doaj.org/toc/2688-4062Test

الوصول الحر: https://doaj.org/article/8ab115e7014f469fa7c0826d99f53069Test

المؤلفون: Xuefeng Fu, Gen Li, Yutao Niu, Jingcao Xu, Puxin Wang, Zhaoxiao Zhou, Ziming Ye, Xiaojun Liu, Zheng Xu, Ziqian Yang, Yongyi Zhang, Ting Lei, Baogui Zhang, Qingwen Li, Anyuan Cao, Tianzai Jiang, Xiaojie Duan

المصدر: Frontiers in Neuroscience, Vol 15 (2021)

مصطلحات موضوعية: brain activity mapping, multi-modal neural interfacing, soft bioelectronics, carbon nanomaterials, biocompatibility, Neurosciences. Biological psychiatry. Neuropsychiatry, RC321-571

الوصف: Implantable brain electrophysiology electrodes are valuable tools in both fundamental and applied neuroscience due to their ability to record neural activity with high spatiotemporal resolution from shallow and deep brain regions. Their use has been hindered, however, by the challenges in achieving chronically stable operations. Furthermore, implantable depth neural electrodes can only carry out limited data sampling within predefined anatomical regions, making it challenging to perform large-area brain mapping. Minimizing inflammatory responses and associated gliosis formation, and improving the durability and stability of the electrode insulation layers are critical to achieve long-term stable neural recording and stimulation. Combining electrophysiological measurements with simultaneous whole-brain imaging techniques, such as magnetic resonance imaging (MRI), provides a useful solution to alleviate the challenge in scalability of implantable depth electrodes. In recent years, various carbon-based materials have been used to fabricate flexible neural depth electrodes with reduced inflammatory responses and MRI-compatible electrodes, which allows structural and functional MRI mapping of the whole brain without obstructing any brain regions around the electrodes. Here, we conducted a systematic comparative evaluation on the electrochemical properties, mechanical properties, and MRI compatibility of different kinds of carbon-based fiber materials, including carbon nanotube fibers, graphene fibers, and carbon fibers. We also developed a strategy to improve the stability of the electrode insulation without sacrificing the flexibility of the implantable depth electrodes by sandwiching an inorganic barrier layer inside the polymer insulation film. These studies provide us with important insights into choosing the most suitable materials for next-generation implantable depth electrodes with unique capabilities for applications in both fundamental and translational neuroscience research.

وصف الملف: electronic resource

العلاقة: https://www.frontiersin.org/articles/10.3389/fnins.2021.771980/fullTest; https://doaj.org/toc/1662-453XTest

الوصول الحر: https://doaj.org/article/f1560daaa79a4d59ad28f2676fe7626cTest

المؤلفون: Hang Wang, Shuang Zhao, Yi Liu, Ruxin Yao, Xiaoqi Wang, Yuhua Cao, Dou Ma, Mingchu Zou, Anyuan Cao, Xiao Feng, Bo Wang

المصدر: Nature Communications, Vol 10, Iss 1, Pp 1-9 (2019)

مصطلحات موضوعية: Science

الوصف: Mixed matrix membranes have shown great promise for separation applications, but low filler loading typically leads to low selectivity. Here the authors use a thermally induced phase separation-hot-pressing strategy to fabricate 10 distinct metal-organic framework-based membrane adsorbers with up to 86 wt% MOF-loading.

وصف الملف: electronic resource

العلاقة: https://doaj.org/toc/2041-1723Test

الوصول الحر: https://doaj.org/article/e489aa5255654e1f927c6c3e0a80fd01Test

المؤلفون: Anyuan Cao, Cailu Xu, Dehai Wu, Qunhui Sun, Xianfeng Zhang

المصدر: MATERIALS TRANSACTIONS. 2002, 43(7):1707

المؤلفون: Hui Li (32376), Shulong Chang (8990558), Meng Li (79487), Keheng Hou (11706338), Lei Han (150108), Anyuan Cao (1368276), Hongbian Li (1419187), Yuanyuan Shang (330283)

مصطلحات موضوعية: Biophysics, Medicine, Microbiology, Neuroscience, Biotechnology, Sociology, Space Science, Biological Sciences not elsewhere classified, Chemical Sciences not elsewhere classified, wearable electronic devices, wearable systems based, maintain stable performance, main functional part, strain sensor based, inherent cnt connection, middle cnt film, derived integrated electrodes, cntie hybrid film, flexible strain sensor, derived electrodes, strain range, strain cycles, seamless connection, performance flexible, main device, integrated electrode, electrode systems, conventional electrodes, versatile substrates, two parts

الوصف: The development of flexible and wearable electronic devices has put an increasing demand on electrode systems with seamless connection and high compatibility with the main device, in order to accommodate complex deformation conditions and maintain stable performance. Here, we present a carbon nanotube-integrated electrode (CNTIE) by wet-pulling the ends of a carbon nanotube (CNT) film to form condensed thin fibers that resemble conventional conducting wire electrodes. A flexible strain sensor was constructed consisting of the middle CNT film as the main functional part and the CNTIE as self-derived electrodes, with inherent CNT connection between the two parts. The sensor can be transferred to versatile substrates (e.g., balloon surface) or encapsulated in thermoplastic polymers, exhibiting a large linear response range (up to 1000% in tensile strain), excellent durability and repeatability over 5000 cycles, and the ability to detect small- to large-degree human body motions. In addition, the strain sensor based on the CNTIE hybrid film (MXene/CNT and graphene/CNT) also shows superior linearity and stability at a strain range of 0–800%. Compared with the sensors using traditional silver wire electrodes and separately fabricated CNT fiber electrodes, our CNTIE plays an important role in achieving highly stable performance in the strain cycles. Our self-derived integrated electrodes provide a potential route to solve the incompatibility issues of conventional electrodes and to develop high-performance flexible and wearable systems based on CNTs and other nanomaterials.

العلاقة: https://figshare.com/articles/journal_contribution/Flexible_and_Stable_Carbon_Nanotube_Film_Strain_Sensors_with_Self-Derived_Integrated_Electrodes/17014118Test

الإتاحة: https://doi.org/10.1021/acsami.1c13530.s001Test

المؤلفون: Yizeng Wu, Bo Zhao, Xuewei Zhao, Lei Han, Yuanyuan Shang, Zhiqiang Niu, Yulong Liang, Xinbo Zhang, Zhuoliang Jiang, Fujun Li, Anyuan Cao

المصدر: Materials Today. 59:68-79

مصطلحات موضوعية: Mechanics of Materials, Mechanical Engineering, General Materials Science, Condensed Matter Physics

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_________::c03e481f6bbdd5425abf93e1af42d880Test
https://doi.org/10.1016/j.mattod.2022.07.005Test

المؤلفون: Bo Zhao, Yizeng Wu, Lei Han, Zhiyuan Xia, Qi Wang, Shulong Chang, Bo Liu, Gongming Wang, Yuanyuan Shang, Anyuan Cao

المصدر: Energy Storage Materials. 50:344-354

مصطلحات موضوعية: Renewable Energy, Sustainability and the Environment, Energy Engineering and Power Technology, General Materials Science

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_________::2faec0dcb045c3d5f9e5eca01a9ee0cdTest
https://doi.org/10.1016/j.ensm.2022.05.029Test

المؤلفون: Yunxing Li, Rui Pang, Weixue Meng, Ding Zhang, Meng Li, Zhiyuan Xia, Jiyong Feng, Hongbian Li, Anyuan Cao, Yuanyuan Shang

المصدر: Carbon. 195:19-26

مصطلحات موضوعية: General Materials Science, General Chemistry

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_________::5c6f9cf175e1f40dd585602c0b462ffbTest
https://doi.org/10.1016/j.carbon.2022.04.002Test

المؤلفون: Lei Han, Yizeng Wu, Bo Zhao, Weixue Meng, Ding Zhang, Meng Li, Rui Pang, Yingjiu Zhang, Anyuan Cao, Yuanyuan Shang

المصدر: ACS Applied Materials & Interfaces. 14:30847-30856

مصطلحات موضوعية: General Materials Science

الوصف: Preparation of high-efficiency dual-functional catalysts remains the bottleneck for electrochemical water splitting. To prepare a non-precious metal catalyst with high activity and stability, here, we present a seaweed-like structure consisting of transition-metal sulfide nanoplates self-assembled on carbon nanotube sponge networks (SW-CoS@CNT). By adjusting the key parameters during synthesis (e.g., the loading amount and ratio of Co and S precursors), the microstructure can be tailored in a wide range, and sulfur defects can be introduced into the nanoplates by thermal annealing. The resulting SW-CoS@CNT serves as a freestanding dual-functional catalytic electrode, showing low overpotentials of 105 and 218 mV for the hydrogen evolution reaction and the oxygen evolution reaction, respectively, which are superior to most reported transition-metal-sulfide-based catalysts in alkaline solution. Rational design of this hierarchical biomimetic structure may be useful in developing high-performance electrochemical catalysts in renewable energy and environmental fields.

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::585d40a1664bfb264ccd7c2e4d532fb9Test
https://doi.org/10.1021/acsami.2c06122Test