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A silk-based self-adaptive flexible opto-electro neural probe

Microsystems & Nanoengineering 2022年第6期8卷 85-96页

作者： Yu Zhou Chi Gu Jizhi Liang Bohan Zhang huiran Yang Zh.tao Zhou Meng Li Liuyang Sun tiger h.tao Xiaoling Wei State Key Laboratory of Transducer Technology Shanghai Institute of Microsystem and Information TechnologyChinese Academy of Sciences200050 ShanghaiChina School of Graduate Study University of Chinese Academy of Sciences100049 BeijingChina School of Physical Science and Technology ShanghaiTech University200031 ShanghaiChina 2020 X-Lab Shanghai Institute of Microsystem and Information TechnologyChinese Academy of Sciences200050 ShanghaiChina Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences100049 BeijingChina Center for Excellence in Brain Science and Intelligence Technology Chinese Academy of Sciences200031 ShanghaiChina Neuroxess Co. Ltd.(Jiangxi)330029 NanchangJiangxiChina Guangdong Institute of Intelligence Science and Technology Hengqin519031 ZhuhaiGuangdongChina Tianqiao and Chrissy Chen Institute for Translational Research ShanghaiChina

The combination of optogenetics and electrophysiological recording enables high-precision bidirectional interactions between neural interfaces and neural circuits,which provides a promising approach for the study of progressive neurophysiological ***-electrophysiological neural probes with sufficient flexibility and biocompatibility are desirable to match the low mechanical stiffness of brain tissue for chronic reliable ***,lack of rigidity poses challenges for the accurate implantation of flexible neural probes with less ***,we report a hybrid probe(Silk-Optrode)consisting of a silk protein optical fiber and multiple flexible microelectrode *** Silk-Optrode can be accurately inserted into the brain and perform synchronized optogenetic stimulation and multichannel recording in freely behaving *** plays an important role due to its high transparency,excellent biocompatibility,and mechanical *** the hydration of the silk optical fiber,the Silk-Optrode probe enables itself to actively adapt to the environment after implantation and reduce its own mechanical stiffness to implant into the brain with high fidelity while maintaining mechanical compliance with the surrounding *** probes with 128 recording channels can detect high-yield well-isolated single units while performing intracranial light stimulation with low optical losses,surpassing previous work of a similar *** months of post-surgery results suggested that as-reported Silk-Optrode probes exhibit better implant-neural interfaces with less immunoreactive glial responses and tissue lesions.

关键词： neural recording implantation

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A mosquito mouthpart-like bionic neural probe

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Microsystems & Nanoengineering 2023年第4期9卷 77-90页

作者： Yu Zhou huiran Yang Xueying Wang heng Yang Ke Sun Zh.tao Zhou Liuyang Sun Jianlong Zhao tiger h.tao Xiaoling Wei State Key Laboratory of Transducer Technology Shanghai Institute of Microsystem and Information TechnologyChinese Academy of Sciences200050 ShanghaiChina School of Graduate Study University of Chinese Academy of Sciences100049 BeijingChina 2020 X-Lab Shanghai Institute of Microsystem and Information TechnologyChinese Academy of Sciences200050 ShanghaiChina Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences100049 BeijingChina Center for Excellence in Brain Science and Intelligence Technology Chinese Academy of Sciences200031 ShanghaiChina Neuroxess Co. Ltd.(Jiangxi)330029 NanchangJiangxiChina Guangdong Institute of Intelligence Science and Technology Hengqin519031 ZhuhaiGuangdongChina Tianqiao and Chrissy Chen Institute for Translational Research ShanghaiChina

Advancements in microscale electrode technology have revolutionized the field of neuroscience and clinicalapplications by offering high temporal and spatial resolution of recording and stimulation. Flexible neural probes, withtheir mechanical compliance to brain tissue, have been shown to be superior to rigid devices in terms of stability andlongevity in chronic recordings. Shuttle devices are commonly used to assist flexible probe implantation;however, theprotective membrane of the brain still makes penetration difficult. hidden damage to brain vessels duringimplantation is a significant risk. Inspired by the anatomy of the mosquito mouthparts, we present a biomimeticneuroprobe system that integrates high-sensitivity sensors with a high-fidelity multichannel flexible electrode *** customizable system achieves distributed and minimally invasive implantation across brain regions. Mostimportantly, the system’s nonvisual monitoring capability provides an early warning detection for intracranial softtissues, such as vessels, reducing the potential for injury during implantation. The neural probe system demonstratesexceptional sensitivity and adaptability to environmental stimuli, as well as outstanding performance in postoperativeand chronic recordings. These findings suggest that our biomimetic neural-probe device offers promising potential forfuture applications in neuroscience and brain-machine interfaces.

关键词： neural implantation recording

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A Drosophila-inspired intelligent olfactory biomimetic sensing system for gas recognition in complex environments

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Microsystems & Nanoengineering 2024年第5期10卷 319-330页

作者： Xiawei Yue Jiachuang Wang heng Yang Zening Li Fangyu Zhao Wenyuan Liu Pingping Zhang hong Chen hanjun Jiang Nan Qin tiger h.tao State Key Laboratory of Transducer Technology Shanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai 200050China School of Graduate Study University of Chinese Academy of SciencesBeijing 100049China Suzhou huiwen Nanotechnology Co.Ltd. Jiangsu 215004China School of Integrated Circuits Tsinghua UniversityBeijing 100084China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China 2020 X-Lab Shanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai 200050China Center for Excellence in Brain Science and Intelligence Technology Chinese Academy of SciencesShanghai 200031China Neuroxess Co.Ltd.(Jiangxi) NanchangJiangxi 330029China Guangdong Institute of Intelligence Science and Technology HengqinZhuhaiGuangdong 519031China OTianqiao and Chrissy Chen Institute for Translational Research ShanghaiChina

The olfactory sensory system of Drosophila has several advantages,including low power consumption,high rapidity and high ***,we present a biomimetic intelligent olfactory sensing system based on the integration of an 18-channel microelectromechanical system(MEMS)sensor array(16 gas sensors,1 humidity sensor and 1 temperature sensor),a complementary metal-oxide-semiconductor(CMOS)circuit and an olfactory lightweight machine-learning algorithm inspired by *** system is an artificial version of the biological olfactory perception system with the capabilities of environmental sensing,multi-signal processing,and odor *** olfactory data are processed and reconstructed by the combination of a shallow neural network and a residual neural network,with the aim to determine the noxious gas information in challenging environments such as high humidity scenarios and partially damaged sensor *** a result,our electronic olfactory sensing system is capable of achieving comprehensive gas recognition by qualitatively identifying 7 types of gases with an accuracy of 98.5%,reducing the number of parameters and the difficulty of calculation,and quantitatively predicting each gas of 3-5 concentration gradients with an accuracy of 93.2%;thus,these results show superiority of our system in supporting alarm systems in emergency rescue scenarios.

关键词： system environments humidity

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Long-term flexible penetrating neural interfaces:materials, structures, and implantation

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Science China(Information Sciences) 2021年第12期64卷 5-22页

作者： Chi GU Jianjuan JIANG tiger h.tao Xiaoling WEI Liuyang SUN State Key Laboratory of Transducer Technology Shanghai Institute of Microsystem and Information TechnologyChinese Academy of Sciences University of Chinese Academy of Sciences School of Physical Science and Technology Shanghai Tech University Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Science 52020 X-Lab Shanghai Institute of Microsystem and Information TechnologyChinese Academy of Sciences Shanghai Research Center for Brain Science and Brain-Inspired Intelligence Center for Excellence in Brain Science and Intelligence Technology Chinese Academy of Sciences

Penetrating neural interface, which collects the neural electrophysiological signal and serves as a key component in brain-computer interface, has drawn great attention recently. The instability of chronic recording is the main challenge for the conventional neural interface. Novel neural probes with improved long-term performance have been developed based on advanced materials and engineered structures. here, we review these emergent innovations contributing to chronic stable recording from the perspectives of materials,structures, and implantation methods. These advances make possible further developments in neuroscience research related to neural decoding, neural circuit mechanism analysis, and neurological disease treatment.

关键词： neural interface long-term flexible minimally invasive biocompatibility

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Through-polymer,via technology-enabled,flexible,lightweight,and integrated devices for implantable neural probes

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Microsystems & Nanoengineering 2024年第2期10卷 279-291页

作者： Cunkai Zhou Ye Tian Gen Li Yifei Ye Lusha Gao Jiazhi Li Ziwei Liu haoyang Su Yunxiao Lu Meng Li Zh.tao Zhou Xiaoling Wei Lunming Qin tiger h.tao Liuyang Sun College of Electronics and Information Engineering Shanghai University of Electric PowerShanghaiChina 2020 X-Lab Shanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghaiChina School of Graduate Study University of Chinese Academy of SciencesBeijingChina State Key Laboratory of Transducer Technology Shanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghaiChina Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijingChina School of Physical Science and Technology ShanghaiTech UniversityShanghaiChina Center for Excellence in Brain Science and Intelligence Technology Chinese Academy of SciencesShanghaiChina Neuroxess Co. Ltd.(Jiangxi)NanchangJiangxiChina Guangdong Institute of Intelligence Science and Technology HengqinZhuhaiGuangdongChina Tianqiao and Chrissy Chen Institute for Translational Research ShanghaiChina

In implantable electrophysiological recording systems,the headstage typically comprises neural probes that interface with brain tissue and integrated circuit chips for signal *** advancements in MEMS and CMOS technology have significantly improved these components,their interconnection still relies on conventional printed circuit boards and sophisticated *** conventional approach adds considerable weight and volume to the package,especially for high channel count *** address this issue,we developed a through-polymer via(TPV)method inspired by the through-silicon via(TSV)technique in advanced three-dimensional *** innovation enables the vertical integration of flexible probes,amplifier chips,and PCBs,realizing a flexible,lightweight,and integrated device(FLID).The total weight of the FLIDis only 25%that of its conventional counterparts relying on adapters,which significantly increased the activity levels of animals wearing the FLIDs to nearly match the levels of control animals without ***,by incorporating a platinum-iridium alloy as the top layer material for electrical contact,the FLID realizes exceptional electrical performance,enabling in vivo measurements of both local field potentials and individual neuron action *** findings showcase the potential of FLIDs in scaling up implantable neural recording systems and mark a significant advancement in the field of neurotechnology.

关键词： alloy neural recording

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Advanced nerve regeneration enabled by neural conformal electronic stimulators enhancing mitochondrial transport

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Bioactive Materials 2024年第9期39卷 287-301页

作者： hao Bai Siqi Zhang huiran Yang Jing Wang hongli Chen Jia Li Lin Li Qian Yang Bo Peng Ziyi Zhu Siyuan Ni Keyin Liu Wei Lei tiger h.tao Yafei Feng Department of Orthopedics Xijing HospitalThe Fourth Military Medical UniversityXi’an710032China State Key Laboratory of Transducer Technology Shanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai200050China Key Laboratory of Aerospace Medicine of the Ministry of Education School of Aerospace MedicineFourth Military Medical UniversityXi’anChina The Institute of Flexible Electronics(IFE Future Technologies)Xiamen UniversityXiamen361005FujianChina Frontiers Science Center for Flexible Electronics Xi’an Institute of Flexible Electronics(IFE)and Xi’an Institute of Biomedical Materials&EngineeringNorthwestern Polytechnical UniversityXi’an710072PR China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing100049China School of Physical Science and Technology ShanghaiTech UniversityShanghai200031China Institute of Brain-Intelligence Technology Zhangjiang LaboratoryShanghai200031China

Addressing peripheral nerve defects remains a significant challenge in regenerative *** as the gold-standard management,however,are hindered by limited availability and potential *** recent studies report the potential of wireless electronic system for nerve defects ***,few has met clinical needs for inadequate electrode precision,poor nerve entrapment andinsufficient bioactivity of the matrix ***,we present an advanced wireless electrical nerve stimulator,based on water-responsive self-curling silk membrane with excellent bioabsorbable and *** constructed a unique bilayer structure with an oriented pre-stretched inner layer and a generalsilk membrane as outer *** wetting,the simultaneous contraction of inner layer and expansion of outerlayer achieved controllable super-contraction from 2D flat surface to 3D structural *** enablesshape-adaptive wrapping to cover around nerves,overcomes the technical obstacle of preparing electrodes on theinner wall of the conduit,and prevents electrode breakage caused by material expansion in *** use of forkcapacitor-like metal interface increases the contact points between the metal and the regenerating nerve,solvingthe challenge of inefficient and rough electrical stimulation methods in the *** developed electronicstimulator is effective in restoring 10 mm rat sciatic nerve defects comparable to autologous *** underlyingmechanism involves that electric stimulation enhances anterograde mitochondrial transport to matchenergy *** newly introduced device thereby demonstrated the potential as a viable and efficaciousalternative to autografts for enhancing peripheral nerve repair and functional recovery.

关键词： Silk materials Electronic stimulator Structural reconfiguration Peripheral nerve regeneration Mitochondrial transport

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A polynomial resultant approach to algebraic constructions of extremal graphs

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Science China Mathematics 2025年第2期68卷 485-506页

作者： tao Zhang Zixiang Xu Gennian Ge Institute of Mathematics and Interdisciplinary Sciences Xidian UniversityXi’an 710071China School of Mathematical Sciences Capital Normal UniversityBeijing 100048China

The Turán problem asks for the largest number of edges ex(n,h)in an n-vertex graph not containing a fixed forbidden subgraph h,which is one of the most important problems in extremal graph ***,the order of magnitude of ex(n,h)for bipartite graphs is known only in a handful of *** particular,giving explicit constructions of extremal graphs is very challenging in this *** this paper,we develop a polynomial resultant approach to the algebraic construction of explicit extremal graphs,which can efficiently decide whether a specified structure exists.A key insight in our approach is the multipolynomial resultant,which is a fundamental tool of computational algebraic *** main results include the matched lower bounds on the Turán number of 1-subdivision of K3,t1and the linear Turán number of the Berge theta hypergraph■_(3,t_(2))^(B).where t_(1)=25 and t_(2)=***,the constant t1improves the random algebraic construction of Bukh and Conlon(2018)and makes the known estimation better on the smallest value of t1concerning a problem posed by Conlon et al.(2021)by reducing the value from a magnitude of 10^(56)to the number 25,while the constant t_(2)improves a result of he and Tait(2019).

关键词： Turan number resultant algebraic construction subdivision Berge theta hypergraph

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Phosphorylation modification reverses the transcriptional inhibitory activity of CsMYB4a in tea plants(Camellia sinensis)

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horticultural Plant Journal 2025年第1期11卷 406-416页

作者： Guoliang Ma Yunyun han Tongtong Li tao Xia Liping Gao School of Life Science Anhui Agricultural UniversityHefeiAnhui 230036China State Key Laboratory of Tea Plant Biology and Utilization Key Laboratory of Tea Biology and Tea Processing of Ministry of AgricultureAnhui Provincial Laboratory of Tea Plant Biology and UtilizationAnhui Agricultural UniversityHefeiAnhui 230036China

The members of the fourth subgroup of R2R3-MYB(Sg4 members)are well-known inhibitors of phenylpropanoid and lignin synthesis *** C2 domain is closely related to the transcriptional inhibitory activity of Sg4 *** modification enhances the transcriptional inhibitory activity of Sg4 ***,we identified a phosphorylation site on the C2 domain of Cs MYB4a from tea plants(Camellia sinensis).A mitogen-activated protein kinase(MAPK),named Cs MPK3-2,phosphorylated this site on the C2 domain of Cs *** experiments revealed that phosphorylation of Cs MYB4a weakened its ability to inhibit the gene expression of PAL,C4h,and 4CL in the phenylpropanoid pathway and activated the expression of transcription factor YABBY5,maintaining the adaxial-abaxial polarity of the *** out Nt YAB5 in Cs MYB4a transgenic tobacco partially repaired the leaf wrinkling phenotype caused by Cs *** C1 domain exhibited an activation function when the C2 domain of Cs MYB4a was phosphorylated by Cs MPK3-2,causing this reversal *** results enrich our understanding of the regulatory diversity of Sg4 members.

关键词： Camellia sinensis Cs MYB4a Phenylpropanoid pathway MAPK YABBY Leaf development

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The renaissance of oxo synthesis: heterogeneous Rh-catalyzed hydroformylation

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Science China Chemistry 2025年

作者： tao Yan Zhi Cao State Key Laboratory of Coal Conversion Institute of Coal Chemistry Chinese Academy of Sciences University of Chinese Academy of Sciences National Energy Center for Coal to Clean Fuels Synfuels China Technology Co. Ltd.

hydroformylation could convert olefins and syngas （mixture of h2and CO） into aldehydes with a great atomic *** transformation serves as one of the most prominent processes in modern chemical industry, as it provides over 10million tons of aldehydes as feedstock for our daily essential products such as plasticizers, paints, solvents, and pharmaceuticals. This process generally requires efficient yet robust catalyst to realize decent efficacy. Compared with metals such as Co, Ru, and Pd, rhodium （Rh）-based catalysts stand out due to its superior activity even under mild reaction conditions, and dominate over 70%of global hydroformylation processes.

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From waste to wealth:Coal tar residue derived carbon materials as low-cost anodes for potassium-ion batteries

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International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 464-475页

作者： Zhonghua Lu Jun Shen Xin Zhang Lingcong Chao Liang Chen Ding Zhang tao Wei Shoudong Xu College of Chemical Engineering and Technology Taiyuan University of TechnologyTaiyuan 030024China College of Chemistry Taiyuan University of TechnologyTaiyuan 030024China School of Chemical Engineering and Pharmacy Wuhan Institute of TechnologyWuhan 430205China School of Energy and Power Jiangsu University of Science and TechnologyZhenjiang 212003China

Carbon materials are widely recognized as highly promising electrode materials for various energy storage system *** tar residues(CTR),as a type of carbon-rich solid waste with high value-added utilization,are crucially important for the development of a more sustainable *** this study,we employed a straightforward direct carbonization method within the temperature range of 700-1000℃to convert the worthless solid waste CTR into economically valuable carbon materials as anodes for potassium-ion batteries(PIBs).The effect of carbonization temperature on the microstructure and the potassium ions storage properties of CTR-derived carbons(CTRCs)were systematically explored by structural and morphological characterization,alongside electrochemical performances *** on the co-regulation between the turbine layers,crystal structure,pore structure,functional groups,and electrical conductivity of CTR-derived carbon carbonized at 900℃(CTRC-900h),the electrode material with high reversible capacity of 265.6m Ah·g^(-1)at 50 m A·g^(-1),a desirable cycling stability with 93.8%capacity retention even after 100 cycles,and the remarkable rate performance for PIBs were ***,cyclic voltammetry(CV)at different scan rates and galvanostatic intermittent titration technique(GITT)have been employed to explore the potassium ions storage mechanism and electrochemical kinetics of *** indicate that the electrode behavior is predominantly governed by surface-induced capacitive processes,particularly under high current densities,with the potassium storage mechanism characterized by an“adsorption-weak intercalation”*** work highlights the potential of CTR-based carbon as a promising electrode material category suitable for high-performance PIBs electrodes,while also provides valuable insights into the new avenues for the high value-added utilization of CTR.

关键词： coal tar residue carbon materials anode potassium-ion batteries high value-added

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