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Coexistence of unipolar and bipolar resistive switching in optical synaptic memristors and neuromorphic computing

Chip 2025年第1期4卷 34-43页

作者： Dongsheng Cui Mengjiao Pei Zhenhua Lin Yifei Wang Hong Zhang Xiangxiang Gao Haidong Yuan Yun Li Jincheng Zhang Yue Hao Jingjing Chang State Key Laboratory of Wide-Bandgap Semiconductor Devices and Integrated Technology School of MicroelectronicsXidian UniversityXi’an 710071China National Laboratory of Solid-State Microstructures School of Electronic Science and EngineeringCollaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210093China Advanced Interdisciplinary Research Center for Flexible Electronics Academy of Advanced Interdisciplinary ResearchXidian UniversityXi’an 710071China

The human brain possesses a highly developed capability for sensing-memory-computing,and the integration of hardware with brain-like functions represents a novel approach to overcoming the von Neumann *** this study,Ga_(2)O_(3) photoelectric memristors were successfully fabricated,enabling efficient visual information processing and complex recognition through the integration of optoelectronic synapses with digital *** memristors with a Pt/Ga_(2)O_(3)/Pt sandwich structure exhibit the coexistence of unipolar resistive switching(URS)and bipolar resistive switching(BRS),coupled with an impressive switching ratio and stable retention *** device demonstrates robust photo-responsive properties to ultraviolet(UV)light,which enables the realization of an array of 16 photoconductor types through the manipulation of four-timeframe pulse *** of the device to UV light elicits stable synaptic behaviors,including paired-pulse facilitation(PPF),short-term memory(STM),long-term memory(LTM),as well as learning-forgettingrelearning ***,the device exhibits outstanding image sensing,image memory,and neuromorphic visual preprocessing capabilities as a neuromorphic vision sensor(NVS).The integration of light pulse potentiation with electrical pulse depression yields a remarkable 100 conductances with superior *** advanced functionality is further validated by the ability of the device to facilitate the recognition of 85.3%of handwritten digits by artificial neural networks(ANNs),which underscores the significant potential of artificial synapses in mimicking biological neural.

关键词： RRAM URS BRS Optical synapse Neuromorphic computing

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Polymers for Flexible electronics

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Chinese Journal of Polymer science 2022年第12期40卷 1513-1514页

作者： HUANG Wei Frontiers Science&Fundamental Research Center for Flexible Electronics Shaanxi Institute of Flexible Electronics&Institute of Biomedical Materials and EngineeringNorthwestern Polytechnical University Key Laboratory of Flexible Electronics(KLoFE)and Institute of Advanced Materials(IAM) School of Flexible Electronics(SoFE)Nanjing Tech University(NanjingTech) State Key Laboratory of Organic Electronics and Information Displays and Institute of Advanced Materials(IAM) School of Materials Science and EngineeringNanjing University of Posts&Telecommunications

The discovery of conductive polyacetylene by Heeger,MacDiarmid,and Shirakawa et *** 1977 opened a new era,which led them to win the 2000 Nobel Prize in Chem-istry for“The discovery and development of conductive polymers”.[1]In 1987,Tang and VanSlyke reported sand-wiched electroluminescence device structures,represent-ing a milestone in the field of organic electronics.[2]In 1990,Friend,Holmes,Bradley,and their coworkers from the Cavendish Laboratory and Melville Laboratory with Cambridge University developed their polymer-based electroluminescent devices,which was widely recognized as opening the door of plastic electronics.[3]Since then,the technologies of organic light-emitting diodes(OLED),organic photovoltaics(OPV),organic field-effect transist-ors(OFET),and organic solid-state lasers(OSSL),based on conductive polymers have been pushing forward quite rapidly.

关键词： conductive diodes electronics

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Functional LiTaO_(3)filler with tandem conductivity and ferroelectricity for PVDF-based composite solid-state electrolyte

Energy Materials and Devices

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Energy materials and Devices 2023年第1期1卷 95-105,94页

作者： Yu Yuan Likun Chen Yuhang Li Xufei An Jianshuai Lv Shaoke Guo Xing Cheng Yang Zhao Ming Liu Yan-Bing He Feiyu Kang Shenzhen All-Solid-State Lithium Battery Electrolyte Engineering Research Center Institute of Materials Research(IMR)Tsinghua Shenzhen International Graduate SchoolShenzhen 518055China School of Materials Science and Engineering Tsinghua UniversityBeijing 100084China

Composite solid-state electrolytes have received significant attention due to their combined advantages as inorganic and polymer ***,conventional ceramic fillers offer limited ion conductivity enhancement for composite solid-state electrolytes due to the space-charge layer between the polymer matrix and ceramic *** this study,we develop a ferroelectric ceramic ion conductor(LiTaO_(3))as a func-tional filler to simultaneously alleviate the space-charge layer and provide an extra Li+transport *** obtained composite solid-state electrolyte comprising LiTaO_(3)filler and poly(vinylidene difluoride)matrix(P-LTO15)achieves an ionic conductivity of 4.90×10^(−4)S cm−1 and a Li+transference number of *** polar-ized ferroelectric LiTaO_(3)creates a uniform electric field and promotes homogenous Li plating/stripping,providing the Li symmetrical batteries with an ultrastable cycle life for 4000 h at 0.1 mA cm^(−2)and a low polar-ization overpotential(~50 mV).Furthermore,the solid-state NCM811/P-LTO15/Li full batteries achieve an ultralong cycling performance(1400 cycles)at 1 C and a high discharge capacity of 102.1 mAh g^(−1)at 5 *** work sheds light on the design of functional ceramic fillers for composite solid-state electrolytes to effec-tively enhance ion conductivity and battery performance.

关键词： ferroelectric ion conductor composite solid-state electrolytes space charge layer Li deposition

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MXene-based all-solid flexible electrochromic microsupercapacitor

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Microsystems & Nanoengineering 2024年第3期10卷 347-355页

作者： Shanlu Guo Ruihe Zhu Jingwei Chen Weilin Liu Yuxiang Zhang Jianmin Li Haizeng Li College of Electronic and Optical Engineering&College of Flexible Electronics(Future Technology) Nanjing University of Posts and TelecommunicationsNanjing 210023China School of Materials Science and Engineering Ocean University of ChinaQingdao 266100China Optics and Thermal Radiation Research Center Institute of Frontier and Interdisciplinary ScienceShandong UniversityQingdao 266237China Shenzhen Research Institute of Shandong University Shenzhen 518000China State Key Laboratory of Featured Metal Materials and Life Cycle Safety for Composite Structures Guangxi UniversityNanning 530004China

With the increasing demand for multifunctional optoelectronic devices,flexible electrochromic energy storage devices are being widely recognized as promising platforms for diverse ***,simultaneously achieving high capacitance,fast color switching and large optical modulation range is very *** this study,the MXenebased flexible in-plane microsupercapacitor was fabricated via a mask-assisted spray coating *** adding electrochromic ethyl viologen dibromide(EVB)into the electrolyte,the device showed a reversible color change during the charge/discharge *** to the high electronic conductivity of the MXene flakes and the fast response kinetics of EVB,the device exhibited a fast coloration/bleaching time of 2.6 s/2.5 s,a large optical contrast of 60%,and exceptional coloration *** addition,EVB acted as a redox additive to reinforce the energy storage performance;as a result,the working voltage window of the Ti_(3)C_(2)-based symmetric aqueous microsupercapacitor was extended to 1 ***,the device had a high areal capacitance of 12.5 mF cm^(−2)with superior flexibility and mechanical stability and showed almost 100%capacitance retention after 100 bending *** as-prepared device has significant potential for a wide range of applications in flexible and wearable electronics,particularly in the fields of camouflage,anticounterfeiting,and displays.

关键词： capacitance kinetics exceptional

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Stably doped graphene transparent electrode with improved lightextraction for efficient flexible organic light-emitting diodes

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Nano research 2023年第11期16卷 12788-12793页

作者： Lai-Peng Ma Zhongbin Wu Yukun Yan Dingdong Zhang Shichao Dong Jinhong Du Dongge Ma Hui-Ming Cheng Wencai Ren Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China Frontiers Science Center for Flexible Electronics Institute of Flexible Electronics(IFE)Northwestern Polytechnical UniversityXi’an 710072China State Key Laboratory of Luminescent Materials&Devices South China University of TechnologyGuangzhou 510640China Shenzhen Institute of Advanced Technology Chinese Academy of SciencesShenzhen 518055China

Graphene-based flexible transparent electrodes(FTEs)are promising candidate materials for developing next-generation flexible organic light-emitting diodes(OLEDs).However,the quest for high-efficiency OLEDs is hindered by the low light-extraction and charge injection efficiencies of graphene ***,we combine the frustrated Lewis pair doping with nanostructure engineering to obtain high-performance graphene FTE.A p-type dopant aci-nitromethane-tris(pentafluorophenyl)borane(ANBCF)was synthesized and deposited on graphene FTE to form an aperiodic nanostructure,which not only improves the light-extraction but also stably p-dopes graphene to enhance its hole *** use of ANBCF-doped graphene as the anode enables high-efficiency flexible green OLEDs with external quantum efficiency(EQE)and power efficiency(PE)out-performing most flexible graphene OLEDs of comparable *** study provides a simple and effective pathway to fabricate high-performance graphene FTEs for efficient flexible OLEDs.

关键词： graphene transparent electrode flexible organic light-emitting diode(OLED) doping light-extraction

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Dual-physical network PVA hydrogel commensurate with articular cartilage bearing lubrication enabled by harnessing nanoscale crystalline domains

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Nano research 2024年第11期17卷 9784-9795页

作者： Danli Hu Desheng Liu Yue Hu Yixian Wang Yaozhong Lu Changcheng Bai Khan Rajib Hossain Pan Jiang Xiaolong Wang State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical Physics Chinese Academy of Sciences Lanzhou 730000 China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences Beijing 100049 China Key Laboratory of Chemistry of Northwestern Plant Resources of Chinese Academy of Sciences Lanzhou Institute of Chemical Physics Chinese Academy of Sciences Lanzhou 730000 China Shandong Laboratory of Advanced Materials and Green Manufacturing at Yantai Yantai Zhongke Research Institute of Advanced Materials and Green Chemical Engineering Yantai 264006 China

Hydrogel, as one of potential soft materials for articular cartilage, has encountered pressing obstacles, such as insufficient mechanical properties, poor lubrication, and easy to wear. To tackle these, we propose a strong yet slippery polyvinyl alcohol/chitosan (PVA/CS) hydrogel with dual-physically crosslinked networks by harnessing freeze-thawing, salting-out, annealing, and rehydration. High mechanical properties of PVA/CS hydrogel can be readily regulated by adjusting proportion of PVA/CS and annealing temperature. The optimized hydrogel exhibits high mechanical properties with tensile strength of ∼ 19 MPa at strain of 550%, compression strength of ∼ 11 MPa at small strain of 39%, and outstanding toughness and antifatigue owing to the robust physical interactions, including hydrogen bonds, crystallization, and ionic coordination. Moreover, the equilibrium hydrogel shows low friction coefficient of ∼ 0.05 against Al_(2)O_(3) ball under the condition of 30 N, 1 Hz, with water as the tribological medium, which is close to the lubrication performance of native cartilage. And meanwhile, the proposed cartilage-like slippery hydrogel displays stable long-term lubrication performance for 1 × 10^(5) reciprocating cycles without destructive wear and structure damage. It is therefore believed that the biocompatible cartilage-like slippery hydrogel opens innovative scenarios for developing cartilage-mimicking water-lubricated coating and biomedical implants with satisfactory load-bearing and lubrication performance.

关键词： slippery hydrogel bio-lubrication high load-bearing salting-out and annealing abrasion resistance

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Bioinspired nanofluidic iontronics for brain-like computing

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Nano research 2024年第2期17卷 503-514页

作者： Lejian Yu Xipeng Li Chunyi Luo Zhenkang Lei Yilan Wang Yaqi Hou Miao Wang Xu Hou State Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China Institute of Artificial Intelligence Xiamen UniversityXiamen 361005China Department of Physics Research Institute for Biomimetics and Soft MatterFujian Provincial Key Laboratory for Soft Functional Materials ResearchJiujiang Research InstituteCollege of Physical Science and TechnologyXiamen UniversityXiamen 361005China The Higher Educational Key Laboratory for Biomedical Engineering of Fujian Province Department of BiomaterialsResearch Center of Biomedical Engineering of XiamenCollege of MaterialsXiamen UniversityXiamen 361005China The Institute of Flexible Electronics(IFE Future Technologies)Xiamen UniversityXiamen 361005China Binzhou Institute of Technology Binzhou 256600China Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province(IKKEM) Xiamen 361102China Engineering Research Center of Electrochemical Technologies of Ministry of Education Xiamen UniversityXiamen 361005China

The human brain performs computations via a highly interconnected network of *** inspiration from the information delivery and processing mechanism of the human brain in central nervous systems,bioinspired nanofluidic iontronics has been proposed and gradually engineered to overcome the limitations of the conventional electron-based von Neumann architecture,which shows the promising potential to enable efficient brain-like *** and tunable nanofluidic ion transport behaviors and spatial confinement show promising controllability of charge carriers,and a wide range of structural and chemical modification paves new ways for realizing brain-like ***,a comprehensive framework of mechanisms and design strategy is summarized to enable the rational design of nanofluidic systems and facilitate the further development of bioinspired nanofluidic *** review provides recent advances and prospects of the bioinspired nanofluidic iontronics,including ion-based brain computing,comprehension of intrinsic mechanisms,design of artificial nanochannels,and the latest artificial neuromorphic functions ***,the challenges and opportunities of bioinspired nanofluidic iontronics in the pioneering and interdisciplinary research fields are proposed,including brain–computer interfaces and artificial neurons.

关键词： human brain ion transport nanofluidics brain-like computing memristive effect

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Supported Atomically Dispersed Pd Catalyzed Direct Alkoxylation and Allylic Alkylation

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Chinese Journal of Chemistry 2024年第7期42卷 719-724页

作者： Ruixuan Qin Ziwen Chen Qingyuan Wu Nanfeng Zheng Pengxin Liu New Cornerstone Science Laboratory State Key Laboratory for Physical Chemistry of Solid SurfacesCollaborative Innovation Center of Chemistry for Energy Materialsand National&Local Joint Engineering Research Center of Preparation Technology of NanomaterialsCollege of Chemistry and Chemical EngineeringXiamen UniversityXiamenFujian 361005China Innovation Laboratry for Scences and Technoogies of Energy Materials of Fujan Province(IKKM) Xiamen Fujian 361102China School of Physical Science and Technology Shanghai Tech UniversityShanghai 201210China Fujian Key Laboratory of Rare-earth Functional Materials Fujian Shanhai Collaborative Innovation Center of Rare-earth Functional MaterialsLongyanFujian 366300China

A new approach to allylic alkylation is realized using an atomically dispersed palladium catalyst(Pd1/TiO2-EG).Unlike conventional methods that require derivation of substrates and utilization of additives,this method allows for direct allylic alkylation from allylic alcohols,producing H2O as the sole *** catalyst's high efficiency is attributed to the local hydrogen bonding at the or-ganic-inorganic interface(Pd-EG interface),facilitating hydroxyl group activation forη3π-allyl complex *** system demonstrates successful direct C—O and C—C coupling reactions with high selectivity,requiring no *** study highlights the potential of supported atomically dispersed catalysts for greener and more efficient catalysis,meanwhile,offers unique insights into the distinct behavior of atomically dispersed catalysts in comparison to homogeneous or nanoparticle-based catalysts.

关键词： Atomically dispersed catalyst Alkylation C—C coupling Organic-inorganic Interface Hydrogen bond Tsuji-Trost reaction Green catalysis

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Solution-processed wafer-scale nanoassembly of conducting polymers enables selective ultratrace nerve agent detection at low power

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Nano research 2023年第4期16卷 5653-5664页

作者： Bin Luo Jianan Weng Zhi Geng Qichao Pan Xilin Pei Yong He Chuanzhi Chen Hongxing Zhang Renbo Wei Yupeng Yuan Jin Yang Jinyi Ma Zhengwei You Bo Zhu School of Materials Science and Engineering&Shanghai Engineering Research Center of Organ Repair Shanghai UniversityShanghai 200444China Innovation Center for Textile Science and Technology Donghua UniversityShanghai 201620China Institute of NBC Defense P.O.Box 1048Beijing 102205China School of Chemical Engineering Northwest UniversityXi’an 710069China th Institute of China Electronics Technology Group Chongqing 400060China State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Material Science and EngineeringDonghua UniversityShanghai 201620China

There is a great interest in developing microelectronic devices based on nanostructured conducting polymers that can selectively electro-couple analytes at high sensitivity and low *** conducting polymers have emerged as promising candidates for this technology due to their excellent stability with low redox potential,high conductivity,and selectivity endowed by chemical ***,it remains challenging to develop cost-effective and large-scale assembly approaches for functionalized conducting polymers in the practical fabrication of electronic ***,we reported a straightforward waferscale assembly of nanostructured hexafluoroisopropanol functionalized poly(3,4-ethylenedioxythiophene)(PEDOT-HFIP)on smooth *** approach is template-free,solution-processed,and adaptable to conductive and nonconductive *** this approach,the nanostructured PEDOT-HFIPs could be easily integrated onto interdigitated electrodes with intimate ohmic *** the optimized space-to-volume ratio,we demonstrated a low-power,sensitive,and selective nerve agent sensing technology using this platform by detecting sarin vapor with a limit of detection(LOD)of 10 ppb and signal strength of 400 times the water interference at the same concentration,offering significant advantages over existing similar *** envision that its easy scale-up,micro size,small power consumption,and combination of high sensitivity and selectivity make it attractive for various wearable platforms.

关键词： conducting polymer PEDOT sensor nano nerve agent

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Co-activation for enhanced K-ion storage in battery anodes

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National science Review 2023年第7期10卷 183-195页

作者： Yanhong Feng Yawei Lv Hongwei Fu Mihir Parekh Apparao M.Rao He Wang Xiaolin Tai Xianhui Yi Yue Lin Jiang Zhou Bingan Lu School of Physics and Electronics Hunan University Department of Physics and Astronomy Clemson Nanomaterials Institute Clemson University Hefei National Research Center for Physical Sciences at the Microscale University of Science and Technology of China School of Materials Science and Engineering Central South University State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body Hunan University

The relative natural abundance of potassium and potentially high energy density has established potassium-ion batteries as a promising technology for future large-scale global energy ***,the anodes' low capacity and high dis charge platform lead to low energy density,which impedes their rapid ***,we present a possible co-activation mechanism between bismuth（Bi） and tin（Sn）that enhances K-ion storage in battery *** co-activated Bi-Sn anode delivered a high capacity of634 mAh g-1,with a discharge plateau as low as 0.35 V,and operated continuously for 500 cycles at a current density of 50 mA g-1,with a high Coulombic efficiency of 99.2%.This possible co-activation strategy for high potassium storage may be extended to other Na/Zn/Ca/Mg/Al ion battery technologies,thus providing insights into how to improve their energy storage ability.

关键词： potassium ion batteries anode co-activation high reversible capacity

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