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materials and devices for high‐density,high‐throughput micro‐electrocorticography arrays

Fundamental Research 2025年第1期5卷 17-28页

作者： Yang Xie Yanxiu Peng Jinhong Guo Muyang Liu Bozhen Zhang Lan Yin He Ding Xing Sheng Department of Electronic Engineering Beijing National Research Center for Information Science and TechnologyInstitute for Precision MedicineLaboratory of Flexible Electronics TechnologyIDG/McGovern Institute for Brain ResearchTsinghua UniversityBeijing 100084China Beijing Engineering Research Center of Mixed Reality and Advanced Display School of Optics and PhotonicsBeijing Institute of TechnologyBeijing 100081China School of Materials Science and Engineering The Key Laboratory of Advanced Materials of Ministry of EducationState Key Laboratory of New Ceramics and Fine ProcessingLaboratory of Flexible Electronics TechnologyTsinghua UniversityBeijing 100084China

The pursuit of precisely recording and localizing neural activities in brain cortical regions drives the development of advanced electrocorticography(ECoG)*** progress has led to the emergence of micro-ECoG(μECoG)devices with sub-millimeter *** review presents the current research status,development directions,potential innovations and applications of high-density,high-throughputμECoG ***,we summarize the challenges associated with accurately recording single or multiple neurons using existingμECoG devices,including passive multielectrode and active transistor ***,we focus on cutting-edge advancements in passiveμECoG devices by discussing the design principles and fabrication strategies to optimize three key parameters:impedance,mechanical flexibility,and ***,recent findings highlight the need for further research and development in active transistor arrays,including silicon,metal oxide,and solution-gated *** active transistor arrays have the potential to unlock the capabilities of high-density,high-throughputμECoG devices and overcome the limitations of passive multielectrode *** review explores the potential innovations and applications ofμECoG devices,showcasing their effectiveness for both brain science research and clinical applications.

关键词： Electrocorticography Micro-electrocorticography Flexible electronics Bioelectronics Neural electrode array

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Recent progress on photoactive nonprecious transition-metal complexes

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Science China Chemistry 2025年第1期68卷 46-95页

作者： Zhong-Liang Gong Hong-Jie Zhang Yan Cheng Jianxun Liu Yuhan Ai Yaqin Li Zhihui Feng Qiong Zhang Shaolong Gong Yong Chen Chang-Jiang Yao Yuan-Yuan Zhu Liang-Jin Xu Yu-Wu Zhong CAS Key Laboratory of Photochemistry Institute of ChemistryChinese Academy of SciencesBeijing 100190China State Key Laboratory of Structural Cemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China School of Chemistry and Chemical Engineering Anhui Key Laboratory of Advanced Catalytic Materials and Reaction EngineeringHefei University of TechnologyHefei 230009China State Key Laboratory of Explosion Science and Safety Protection School of Mechatronical EngineeringBeijing Institute of TechnologyBeijing 100081China College of Chemistry and Molecular Sciences Hubei Key Lab on Organic and Polymeric Optoelectronic MaterialsWuhan UniversityWuhan 430072China School of Chemistry and Chemical Engineering Anhui UniversityHefei 230601China Key Laboratory of Photochemical Conversion and Optoelectronic Materials&CAS-HKU Joint Laboratory on New Materials Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China

Photoactive complexes of nonprecious transition metals,mainly including those in the first-row and partially the second-row of the Periodic table of elements,have received increasing attention in view of their low cost and long-term *** are recognized as promising alternatives to noble transition metal complex congeners that have been extensively studied in optoelectronic devices,artificial photosynthesis,photocatalysis,biodiagnostics,and therapeutics,*** review is devoted to a comprehensive summary on the classical and recent advances on photoactive nonprecious transition metal complexes,including photoactive Zr,V,Cr,Mo,and W complexes,Mn complexes and hybrids,Fe,Co,Ni,and Cu complexes,and Zn and Cd complexes and hybrids.A particular focus is given on the molecular design,modulation of photophysical and photochemical properties,and applications of the representative and lately-developed nonprecious metal *** addition,a perspective on the future development in this field is provided at the end of this review.

关键词： photoactive metal complexes earth-abundant metals nonprecious metal complexes luminescence photochemistry

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Recent progress in metal-organic frameworks(Part Ⅱ—material application)

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Science China Chemistry 2025年第5期68卷 1642-1702页

作者： Jiandong Pang Wentao Jiang Xue-Wen Zhang Hao-Long Zhou Yuxiu Sun Wei Gong Bin Wang Fuyin Ma Linwei He Long Chen Qiang Chen He-Qi Zheng Yuanjing Cui Wen-Jie Shi Chao Zhang Mei Wang Yue-Biao Zhang Jie-Peng Zhang Chongli Zhong Yong Cui Shuao Wang Jian-Rong Li Guodong Qian Tong-Bu Lu Huan Pang Xian-He Bu School of Materials Science and Engineering Nankai University School of Physical Science and Technology Shanghai Tech University MOE Key Laboratory of Bioinorganic and Synthetic Chemistry GBRCE for Functional Molecular EngineeringSchool of ChemistryIGCMESun Yat-sen University Department of Chemistry Shantou University School of Chemical Engineering and Technology Tiangong University School of Chemistry and Chemical Engineering Shanghai Jiao Tong University State Key Laboratory of Radiation Medicine and Protection School for Radiological and Interdisciplinary SciencesSoochow University College of Materials Science & Engineering Beijing University of Technology State Key Laboratory of Silicon and Advanced Semiconductor Materials Cyrus Tang Center for Sensor Materials and ApplicationsSchool of Materials Science & EngineeringZhejiang University Institute for New Energy Materials and Low Carbon Technologies School of Materials Science and EngineeringTianjin University of Technology School of Chemistry and Chemical Engineering Yangzhou University

As a class of functional crystalline porous materials, metal-organic frameworks(MOFs) gained rapid development in the past three decades and a large number of MOFs with ordered structures, high surface areas, and functionalized channels have been investigated. MOFs and MOF-derived/composite materials show great potential in many application fields. In this review, we discussed the main applications of MOFs and MOF-derived/composite materials in small molecule storage, separation, luminescence, sensing, multitype catalysis, and energy storage. In addition, challenges and problems in the future research of MOFs-related fields are also discussed.

关键词： metal-organic frameworks storage and separation sensing and detection multitype catalysis energy storage

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Application of biochar from desorption perspective: Targeting adsorption properties of biochar and its desorption-recovery ability

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Chemical Engineering Research and Design 2025年 218卷 674-681页

作者： Feng, Bingcan Jin, Rushi Wang, Jianming Chen, Wanming Qi, Dongming Zhai, Shimin Key Laboratory of Advanced Textile Materials and Manufacturing Technology Ministry of Education Zhejiang Sci-Tech University Zhejiang Hangzhou 310018 China Zhejiang Xidamen New Materials Co. Ltd. Zhejiang Shaoxing 312000 China Zhejiang Provincial Innovation Center of Advanced Textile Technology Zhejiang Shaoxing 312000 China Zhejiang Haoyu Technology Co. Ltd. Zhejiang Shaoxing 312000 China

Biochar is an effective adsorption material, which could exhibit significant targeting adsorption ability for different pollutants. Most studies focused on its removal ability for pollutants in wastewater. However, the separation and selective recovery for the resource in the mixed wastewater by biochar was ignored. The single component in the mixture can be separated and recovered from the desorption of the selective adsorbed biochar. In this study, the biochar (BC-1) with targeting adsorption ability was prepared and used to selective recover dye from the mixture. The cationic bule X-GRL (CB.X-GRL) can be targeting adsorbed from the mixed dye wastewater, and then desorbed into acetic acid solution. The maximum dye recovery rate of BC-1 for CB.X-GRL reached 82 %. In this targeting adsorption-desorption process, the electrostatic attraction and hydrogen bonding force played a major role. Moreover, the recovered CB.X-GRL can be reused for the acrylic yarn dyeing to realize the resource recovery and utilization. A new application strategy of biochar was proposed from another perspective of resource selective recovery. © 2025 Institution of Chemical Engineers

关键词： Biochar Desorption Dye recovery Reuse Selective adsorption

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High-Performance Flexible Magnetic textile Fabricated Using Porous Juncus effusus Fiber for Biomechanical Energy Harvesting

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Engineering 2025年第3期46卷 267-277页

作者： Junyao Gong Chunhua Zhang Liangjun Xia Zhaozixuan Zhou Weihao Long Zhuan Fu Sijie Zhou Hua Ji Lixin Du Weilin Xu State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile UniversityWuhan 430200China College of Textile Science and Engineering Zhejiang University of Science and TechnologyHangzhou 310018China College of Textiles Donghua UniversityShanghai 201620China Winner Medical Co. Ltd.Wuhan 430200China Luthai Textile Co. Ltd.Zibo 255100China

Mechanical energy produced by human motion is ubiquitous,continuous,and usually not utilized,making it an attractive target for sustainable electricity-harvesting *** this study,flexible magnetic-Juncus effusus(M-JE)fibers were prepared from plant-extracted three-dimensional porous Juncus effusus(JE)fibers decorated with polyurethane and magnetic *** M-JE fibers were woven into fabrics and used for mechanical energy harvesting through electromagnetic *** M-JE fabric and induction coil,attached to the human wrist and waist,yielded continuous and stable voltage(2 V)and current(3 mA)during *** proposed M-JE fabric energy harvester exhibited good energy harvesting potential and was capable of quickly charging commercial capacitors to power small electronic *** proposed M-JE fabric exhibited good mechanical energy harvesting performance,paving the way for the use of natural plant fibers in energy-harvesting fabrics.

关键词： Juncus effusus Magnetic fabrics Electromagnetic induction Energy harvest Mechanical-electrical energy conversion

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Liquid metal-based nanocomposite with triple-amplified Fenton-like reaction for tumor chemodynamic/photothermal/immunotherapy

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Chemical Engineering Journal 2025年 514卷

作者： Wang, Shuai Zou, Yang Zhang, Li Lv, Yonggang State Key Laboratory of New Textile Materials and Advanced Processing Wuhan Textile University Wuhan430200 China Mechanobiology and Regenerative Medicine Laboratory Bioengineering College Chongqing University Chongqing400044 China

Chemodynamic therapy (CDT) combined with immunotherapy has emerged as a promising strategy for tumor treatment. However, the inefficiency of CDT and immunosuppressive tumor microenvironment (ITM) limit the overall effectiveness of this approach. In this study, a manganese-doped mesoporous silica-coated liquid metal nanocomposite, coloaded with small-sized aurum (Au) nanoparticles (NPs) and 1-methyltryptophan (1MT) (denoted as LMSMA1), was developed to improve the efficiency of CDT and reverse ITM. First, the LMSMA1 NPs could consume intracellular overexpressed glutathione (GSH), facilitating Fenton-like ion transfer while reducing GSH-mediated clearance of reactive oxygen species (ROS), thereby enhancing CDT. Second, the intracellular glucose was oxidized to hydrogen peroxide (H2O2) by glucose oxidase (GOx)-mimicking Au NPs, providing an H2O2 boost that further amplified CDT. Additionally, the LMSMA1 NPs increased the local tumor temperature upon near-infrared (NIR) laser irradiation, achieving photothermal therapy (PTT)-enhanced CDT. The resulting triple-amplified Fenton-like reaction induced significant intracellular oxidative stress to cause tumor cell death. For immunotherapy, the activation of cGAS-STING pathway and immunogenic cell death (ICD) resulting from manganese ions (Mn2+) and PTT/CDT could elicit an immune response and subsequently activate cytotoxic T cells. Simultaneously, the released 1MT inhibited indoleamine 2,3-dioxygenase (IDO), suppressing the function of regulatory T cells. This, in turn, alleviated the immunosuppressive microenvironment and reinforced the anti-tumor immune response. In summary, this strategy established a highly feasible concept for integrating triple-amplified CDT with immunotherapy. © 2025 Elsevier B.V.

关键词： Cell death

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Flexible polyvinylidene fluoride/multiwall carbon nanotube-based thermoelectric composite films with excellent environmental stability and enhanced power factor from ferroelectric polarization

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Science China materials 2025年第4期68卷 1240-1248页

作者： Qinghui Jiang Zhenxiang Yu Xinyue Zhang Shanliang Chen Jitao Yi Yong Liu State Key Laboratory of Materials Processing and Die and Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China Foshan(Southern China)Institute for New Materials Foshan 528220China

Flexible thermoelectric(TE)films and devices have potential applications in wearable technology and the Internet of *** of the main challenges is how to simultaneously achieve good TE performance and high chemical/thermal stability in air with low cost and large-scale *** address this,we utilized tape casting to fabricate composite films of polyvinylidene fluoride(PVDF)and multi-walled carbon nanotubes(MWCNTs).In the composite,polarβ-PVDF introduced by hot pressing can decouple the electrical conductivity and Seebeck coefficient and significantly lead to enhanced power factor of MWCNTs/PVDF composite *** a result,the MWCNTs(60 wt%)/PVDF film has a power factor of 1.1-1.4µW m^(-1) K^(-2) near room *** film also has excellent flexibility and stability in the *** power factor is decreased by only 9%after 1000 bends and can keep stable in air for above 6 months,which is much longer than that(15 days)of Bi2Te3/PEDOT:PSS film.A demo TE device with 10 p-type legs has an output voltage of 11.5 mV and output power of 47.53 nW at a temperature difference of 60°*** above descriptions make the MWCNTs/PVDF films have a significant advantage in the commercial application of flexible TE devices.

关键词： thermoelectric PVDE carbon nanotube tape casting ferroelectric polarization

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First-principles investigation of adhesion strength and interfacial bonding in Mg/X(X=Ti,Zr,Hf,V,Nd,Cr,Mo,Mn,and Fe)interface

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Journal of Magnesium and Alloys 2025年第1期13卷 83-89页

作者： Longke Bao Zhifu Yao Yuhui Zhang Cuiping Wang Kaihong Zheng Rongpei Shi Xingjun Liu Fusheng Pan State Key Laboratory of Advanced Welding and Joining Harbin Institute of TechnologyShenzhen 518055China College of Materials Science and Engineering and Institute of Materials Genome and Big DataHarbin Institute of TechnologyShenzhen 518055China Institute of New Materials Guangdong Academy of SciencesGuangzhou 510650China College of Materials Science and Engineering Xiamen UniversityXiamen 361005China College of Materials Science and Engineering Chongqing UniversityChongqing 400045China

Magnesium alloys have gained extensive applications across various industries,including aerospace,transportation,and civil construction,owing to their excellent combinations of high specific strength and stiffness[1].However,their lim-ited strength due to the lack of effective strengthening phases has hindered their broader industrial applications[2].Never-theless,it has been challenging to achieve significant strength-ening due to the restricted solubility of alloying elements in magnesium[3].Thus,more and more efforts have been made to explore the concept of secondary phase-reinforced magne-sium alloys[2,4,5],where the secondary phase acts as re-inforcing agents within the magnesium matrix,resembling a composite material.

关键词： adhesion strength interfacial bonding aluminum alloys industrial applications solubility strengthening phases alloying elements Mg X interfaces

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PDA@ BaTiO₃/CB doping enhances the piezoelectric properties of PVDF membrane for energy harvesting and sensor components

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Journal of Environmental Chemical Engineering 2025年第2期13卷

作者： Zhang, Tianyi Yang, Bo Hao, Ming Hu, Xiaodong Liu, Yanbo Wang, Xiaoxiao School of Textile Science and Engineering State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile University Hubei Wuhan430200 China School of Textile Science and Engineering State Key Laboratory of Separation Membranes and Membrane Processes Tiangong University Tianjin300387 China

Flexible piezoelectric nanogenerators (PENGs) are emerging as sustainable power sources for self-charging wearable electronic devices due to their capability to harvest mechanical energy from the environment. Here, we have developed a high-output flexible PENGs based on electrospun composite nanofibers involving poly(vinylidene fluoride) (PVDF), barium titanate modified by dopamine hydrochloride (PDA@BTO) with an enhanced electroactive phase. On addition of 3 wt% PDA@BTO nanoparticles, the electroactive β-phase of the PVDF is found to be intensified to ∼88.05 % as account of the synergistic interfacial interaction between the PDA@BTO nanoparticles and the ferroelectric host polymer substrate on electrospinning. The introduction of carbon black (CB) promotes piezoelectric charge transfer and increases output power. The PBTO/CB/PVDF composite nanofibers delivered the highest VOC of 55 V and the optimal ISC 3.1 μA with 3 % PBTO and 1 % CB. The fabricated PENG based PBTO/CB/PVDF composite nanofibers successfully charged capacitors with capacities of 0.1 μF, 0.33 μF, and 1 μF to voltages of 1.9 V, 3.2 V, and 10 V within 400 s, respectively. The device has response time of 0.1 s and the d33 piezoelectric constant of 1.7 pC/N. The piezoelectric devices exhibited minimal variation in voltage and excellent stability over 900 cycles and the prepared piezoelectric device can light up to 20 LEDs. The potential of the piezoelectric composite nanofiber membranes for assembling mechanical energy collectors and piezoelectric sensors was demonstrated. © 2025 Elsevier Ltd

关键词： Barium titanate

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Photoemission evidence of a novel charge order in kagome metal FeGe

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Science China(Physics,Mechanics & Astronomy) 2025年第6期Mechanics & Astronomy) .卷 176-182页

作者： Zhisheng Zhao Tongrui Li Peng Li Xueliang Wu Jianghao Yao Ziyuan Chen Yajun Yan Shengtao Cui Zhe Sun Yichen Yang Zhicheng Jiang Zhengtai Liu Alex Louat Timur Kim Cephise Cacho Aifeng Wang Yilin Wang Dawei Shen Juan Jiang Donglai Feng Department of Physics School of Emerging Technology University of Science and Technology of China Hefei National Laboratory University of Science and Technology of China National Synchrotron Radiation Laboratory School of Nuclear Science and Technology University of Science and Technology of China Low Temperature Physics Laboratory College of Physics and Center of Quantum Materials and Devices Chongqing University State Key Laboratory of Functional Materials for Informatics Shanghai Institute of Microsystem and Information Technology (SIMIT)Chinese Academy of Sciences Shanghai Synchrotron Radiation Facility Shanghai Advanced Research Institute Chinese Academy of Sciences Diamond Light Source Ltd. Harwell Science and Innovation Campus New Cornerstone Science Laboratory University of Science and Technology of China

The kagome metal Fe Ge provides a rich platform for understanding the mechanisms behind competing orders, as it exhibits charge order(CO) emerging deep within the antiferromagnetic phase. To investigate the intrinsic origin of this behavior, we examine the evolution of the low-energy electronic structure across the phase transition in annealed Fe Ge samples using angleresolved photoemission spectroscopy. We find no evidence supporting a conventional nesting mechanism, such as Fermi surface nesting or van Hove singularities. However, we observe two notable changes in the band structure: an electron-like band around the K point and another around the A point, both shifting upward in energy when CO forms. These findings are consistent with our density-functional theory calculations, which suggest that the charge order in Fe Ge is primarily driven by magnetic energy savings due to a lattice distortion involving Ge1-dimerization. Our results provide photoemission evidence supporting this novel mechanism for CO formation in Fe Ge, in contrast to the conventional nesting-driven mechanisms.

关键词： kagome metal charge order electronic structure angle-resolved photoemission spectroscopy

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