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A dry-electrode enabled ECG-on-Chip with arrhythmia-aware data transmission

Science China(information Sciences) 2025年

作者： Xinzi XU Yanxing SUO Yang ZHAO Peiyi ZHOU Xiao HAN Qiao CAi Min WANG Jiajun YUAN Liebin ZHAO Yongfu Li Guoxing WANG Yong LiAN Department of Micro-Nano electronics and MoE Key lab of Artificial intelligence Shanghai Jiao Tong University Pediatric Ai Clinical Application and research center Shanghai Engineering Research Center of Intelligence Pediatrics (SERCIP) Child Health Advocacy Institute Shanghai Children's Medical Center School of MedicineShanghai Jiao Tong University Shanghai Engineering research center of intelligence Pediatrics (SERCiP) Xin Hua Hospital Affiliate to Shanghai Jiao Tong University School of Medicine

Early detection and treatment of cardiovascular diseases (CVDs) can be significantly enhanced through the use of flexible wearable electrocardiogram (ECG) sensors, potentially reducing CVD-related mortality. This paper introduces an ECG-on-Chip (EoC) solution tailored for flexible ECG sensors, incorporating novel features to address common challenges in wearable ECG technology. The EoC integrates a chopper-stabilized capacitively-coupled instrumentation amplifier (CS-CCiA),ensuring a high common-mode rejection ratio (CMRR) and low noise performance. Performance is further boosted via a positive feedback loop (PFL) and a programmable gain amplifier (PGA) with shared on-chip calibration logic, which enhances input impedance and minimizes gain variability to ensure consistent algorithm performance. Additionally, a secondary chopping technique is employed to further reduce noise, achieving an input-referred noise level of 454 nVrms. The embedded algorithm within the EoC is designed to extract clinically meaningful features, facilitating robust real-time arrhythmia analysis. Fabricated using a 0.18μm CMOS process, the EoC consumes 14.9μW with a supply voltage of 1.2 V. The algorithm’s efficacy has been validated over 0.4 million heartbeats, demonstrating a sensitivity of over 99.7%for R-peak detection and 98.3%for arrhythmia analysis. To demonstrate practical application, the EoC has been integrated with a commercial Bluetooth low energy (BLE)transceiver, forming a wireless arrhythmia monitoring sensor equipped with dry electrodes. This system consumes 292.04μW in arrhythmia-aware transmission mode, supporting 13 days of operation with a 30 mAh thin-film battery.

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基于铜网栅的高性能可见-红外宽波段透明导电材料及在透明电磁屏蔽与加热领域的应用（英文）

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Science China Materials 2025年

作者：李腾飞陈小连徐兆华聂书红徐文亚袁伟徐速张硕裴芳芳苏文明崔铮 School of Nano-Tech and Nano-Bionics University of Science and Technology of China printable electronics research center Nano-Devices and Materials Division Suzhou Institute of Nano-Tech and Nano-Bionics Chinese Academy of Sciences State Key laboratory of integrated Optoelectronics College of Electronic Science and Engineering Jilin University

目前,用于光电器件和智能窗的可见光透明导电材料已经取得了快速发展.然而,在红外波段,由于透光率和导电性之间的相互制约,可见-红外宽波段透明导电材料的发展受到了限制.为此,本研究提出了一种无损伤的间接转移技术,将剥离后的独立铜...

目前,用于光电器件和智能窗的可见光透明导电材料已经取得了快速发展.然而,在红外波段,由于透光率和导电性之间的相互制约,可见-红外宽波段透明导电材料的发展受到了限制.为此,本研究提出了一种无损伤的间接转移技术,将剥离后的独立铜网栅通过聚合物键合技术转移至可见-红外光谱衬底表面,成功制备出高性能的可见-红外透明铜网栅导电材料.该材料在550 nm时透光率可达81%,在10μm时透光率为65%,同时方阻低至0.06Ω/,有效解决了可见-红外波段中高透光率与高导电性难以兼得的难题.此外,所开发的键合策略赋予该材料优异的附着力和环境可靠性.凭借其出色的性能,铜网栅透明导电材料被应用于透明电加热和电磁屏蔽领域,并表现出优异的效果.在8.2和12.4 GHz频段下,其屏蔽效能分别达到44.7和36.6 dB,是目前报道的可见-红外透明屏蔽材料中性能最佳的材料.这使其在夜视仪光电探测光学窗口的除霜除雾和电磁屏蔽应用中展现出广阔的应用前景.

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Printing practice for the fabrication of flexible and stretchable electronics

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Science China(Technological Sciences) 2019年第2期62卷 224-232页

作者： CUi Zheng printable electronics research center Suzhou Institute of Nanotech and Nano-bionics Chinese Academy of Sciences

Recently, flexible and stretchable electronics have experienced tremendous surge due to their promised applications in fields such as wearable electronics, portable energy devices, flexible display, and human-skin sensors. in order to fabricate flexible and stretchable electronics, a high-throughput, cost-saving, and eco-friendly manufacturing technology is required. Printing, which is an additive patterning process, can meet those requirements. in this article, printing fabrication is compared with conventional lithography process. Practices at the author's group utilizing printing for the fabrication of flexible thin-film transistors, flexible hybrid circuits and stretchable systems are presented, which has proven that printing can indeed be a viable method to fabricate flexible and stretchable electronics.

关键词： printed electronics flexible electronics stretchable electronics electronic inks

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Surface treatment on polyethylenimine interlayer to improve inverted OLED performance

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Chinese Physics B 2016年第10期25卷 529-534页

作者：魏昌庭庄锦勇陈雅丽张东煜苏文明崔铮 Department of Chemistry Shanghai University printable electronics research center Suzhou Institute of Nano-Tech and Nano-Bionics Chinese Academy of Sciences

Polyethylenimine(PEi) interlayer rinsing with different solvents for inverted organic light emitting diodes(OLEDs)is systematically studied in this paper. in comparison with the pristine one, the maximum current efficiency(CE) and power efficiency(PE) are enhanced by 21% and 22% for the device rinsing by ethylene glycol monomethyl ether(EEA).Little effect is found on the work function of the PEi interlayer rinsed by deionized water(Di), ethanol(EtOH), and *** the other hand, the surface morphologies of PEi through different solvent treatments are quite different. Our results indicates that the surface morphology is the key to improving the device performance for iOLED as the work function of PEi keeps stable.

关键词： inverted OLED surface treatment morphology polyethylenimine

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Nonlinear Doping, Chemical Passivation and Photoluminescence Mechanism in Water-Soluble Silicon Quantum Dots by Mechanochemical Synthesis

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Chinese Physics Letters 2018年第3期35卷 62-66页

作者：黄思敏钱波沈若曦谢永林 School of Materials Science and Engineering Shanghai University inkjet Printing Technology research center Printable Electronics Research Center Suzhou Institute of Nanotech and Nanobionics Chinese Academy of Sciences

A series of boron- and phosphorus-doped silicon wafers are used to prepare a series of doped silicon nanocrystals （nc-Si） by high-energy ball milling with carboxylic acid-terminated surface. The sizes of the nc-Si samples are demonstrated to be 〈 S nm. The doping levels of the nc-Si are found to be nonlinearly dependent on the original doping level of the wafers by x-ray photoelectron spectroscopy measurement. it is found that the nonlinear doping process will lead to the nonlinear chemical passivation and photoluminescence （i3L） intensity evolution. The doping, chemical passivation and PL mechanisms of the doped nc-Si samples prepared by mechanochemical synthesis are analyzed in detail.

关键词： Si Nonlinear Doping Chemical Passivation and Photoluminescence Mechanism in Water-Soluble Silicon Quantum Dots by Mechanochemical Synthesis

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inkjet-Printed Organic Solar Cells and Perovskite Solar Cells: Progress,Challenges, and Prospect

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Chinese Journal of Polymer Science 2023年第8期41卷 1169-1197,I0005页

作者： Xing-Ze Chen Qun Luo Chang-Qi Ma School of Nano-Tech and Nano-Bionics University of Science and Technology of ChinaHefei 230027China i-lab&printable electronics research center Suzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of SciencesSuzhou 215123China

in recent years,the power conversion efficiency of organic solar cells(OSCs)and perovskite(PVSCs)has increased to over 19%and25%,***,the long-term stability of OSCs and PVSCs was also significantly improved with a better understanding of the degradation mechanism and the improvement of materials,morphology,and interface *** both the efficiency and lifetime of solar cells are approaching the commercialization limit,fabrication methods for large-area OSCs and PVSCs that can be directly transferred from lab to fab become essential to promote the industrialization of OSCs and *** with the coating methods,inkjet printing is a mature industrial technology with the advantages of random digital patterning,excellent precision and fast printing speed,which is considered to have great potential in solar cell *** efforts have been devoted to developing inkjet-printed OSCs and PVSCs,and much progress has been achieved in the last few *** this review,we first introduced the working principle of inkjet printing,the rheology requirements of inks,and the behaviors of the *** then summarized the recent research progresses of the inkjet-printed OSCs and PVSCs to facilitate knowledge transfer between the two *** the end,we gave a perspective on inkjet-printed OSCs and PVSCs.

关键词： Organic solar cells Perovskite solar cells inkjet printing ink formulation Morphology control

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ZnO Surface Passivation with Glucose Enables Simultaneously improving Efficiency and Stability of inverted Polymer:Non-fullerene Solar Cells

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Chinese Journal of Polymer Science 2022年第12期40卷 1594-1603,I0007页

作者： Bo-Wen Liu Ze-Rui Li Ling-Peng Yan Jing-Bo Guo Qun Luo Chang-Qi Ma School of Nano-Tech and Nano-Bionics University of Science and Technology of ChinaHefei 230026China i-lab&printable electronics research center Suzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of SciencesSuzhou 215123China

The power conversion efficiency(PCE)of polymer solar cells(PSCs)has exceeded 19%due to the rapid progress of photoactive organic materials,including conjugated polymer donors and the matched non-fullerene acceptors(NFAs).Due to the high density of oxygen vacancies and the consequent photocatalytic reactivity of ZnO,structure inverted polymer solar cells with the ZnO electron transport layer(ETL)usually suffer poor device *** this work,the eco-friendly glucose(Glu)is found to simultaneously improve the efficiency and stability of polymer:NFA solar *** the optimal conditions,we achieved improved PCEs from 14.77%to 15.86%for the PM6:Y6 solar *** a PCE improvement was attributed to the improvement in J_(SC) and FF,which is ascribed to the smoother and more hydrophobic surface of the ZnO/Glu surface,thereby enhancing the charge extraction efficiency and inhibiting charge ***,UV-Vis absorption spectra analysis revealed that glucose modification could significantly inhibit the photodegradation of Y6,resulting in a significant improvement in the stability of the device with 92%of its initial PCE after aging for 1250 *** application of natural interface materials in this work brings hope for the commercial application of organic solar cells and provides new ideas for developing new interface materials.

关键词： Polymer solar cells Glucose Surface passivation Charge injection Stability improvement

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Manipulating the Macroscopic and Microscopic Morphology of Large-Area Gravure-Printed ZnO Films for High-Performance Flexible Organic Solar Cells

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Energy & Environmental Materials 2024年第2期7卷 229-239页

作者： Zhenguo Wang Jingbo Guo Yaqin Pan Jin Fang Chao Gong Lixin Mo Qun Luo Jian Lin Changqi Ma School of Nano-Tech and Nano-Bionics University of Science and Technology of ChinaHefei 230026China i-lab&printable electronics research center Suzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of Sciences(CAS)Suzhou 215123China Beijing Engineering research center of Printed electronics Beijing Institute of Graphic CommunicationBeijing 102600China Jiangxi institute of Nanotechnology Chinese Academy of Sciences(CAS)Nanchang 330200China

Gravure printing is a promising large-scale fabrication method for flexible organic solar cells(FOSCs)because it is compatible with two-dimension patternable roll-to-roll ***,the unsuitable rheological property of ZnO nanoinks resulted in unevenness and looseness of the gravure-printed ZnO interfacial *** we propose a strategy to manipulate the macroscopic and microscopic of the gravure-printed ZnO films through using mixed solvent and poly(vinylpyrrolidone)(PVP)*** regulation of drying speed effectively manipulates the droplets fusion and leveling process and eliminates the printing ribbing structure in the macroscopic *** additive of PVP effectively regulates the rheological property and improves the microscopic compactness of the *** this method,large-area ZnO∶PVP films(28×9 cm^(2))with excellent uniformity,compactness,conductivity,and bending durability were *** power conversion efficiencies of FOSCs with gravure-printed AgNWs and ZnO∶PVP films reached 14.34%and 17.07%for the 1 cm^(2)PM6:Y6 and PM6∶L8-BO flexible *** efficiency of 17.07%is the highest value to date for the 1 cm^(2)*** use of mixed solvent and PVP addition also significantly enlarged the printing window of ZnO ink,ensuring high-quality printed thin films with thicknesses varying from 30 to 100 nm.

关键词： flexible organic solar cell gravure printing large-area flexible interfacial layer rheology properties zinc oxide

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Large-Area Gravure-Printed AgNWs Electrode on Water/Oxygen Barrier Substrate for Long-Term Stable Large-Area Flexible Organic Solar Cells

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Chinese Journal of Chemistry 2024年第5期42卷 478-484页

作者： Hao Wang Yaqin Pan Yunfei Han Zhuo Chen Tianyu Liu Lianping Zhang Qun Luo Chang-Qi Ma printable electronics research center & i-lab Suzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of Sciences (CAS)SuzhouJiangsu215123 China Nano Science and Technology institute University of Science and Technology of China166 Ren Ai RoadSEID SIPSuzhouJiangsu215123 China

Large-area AgNWs electrodes(25 cm×10 cm)were fabricated through roll-to-roll printing on the polyvinyl alcohol(PVA)modified water and oxygen barrier *** modification of the barrier film with PVA improved the wettability of silver nanowires on the barrier films and led to the formation of homogenous large-area AgNWs *** mechanical flexibility,especially the adhesion force between the silver electrode and the barrier film substrate was dramatically improved through PVA *** efficiency of 13.51%for the flexible OSCs with an area of 0.64 cm2 was achieved based on the PET/barrier film/PVA/AgNWs *** long-term stability showed the flexible OSCs based on the PET/barrier film/PVA/AgNWs electrode have a significantly improved stability relative to the device on PET/AgNWs electrode,and comparable air stability as the rigid device with glass/iTO *** unencapsulated devices maintained nearly 50%of the original efficiency after storage for 600 h in *** a simple top encapsulation,the flexible devices remained at 60%of the initial efficiency after 2000 h in the ***,the flexible AgNWs electrode based on the barrier film would have the potential to improve the air storage stability of organic flexible solar cells.

关键词： Flexible organic solar cell AgNWs electrode Air storage stability Barrier films substrate Energy conversion Flexible electronics interface

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Direct Photolithography of WO_(x)Nanoparticles for High‑Resolution Non‑Emissive Displays

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Nano-Micro Letters 2025年第3期17卷 297-309页

作者： Chang Gu Guojian Yang Wenxuan Wang Aiyan Shi Wenjuan Fang Lei Qian Xiaofei Hu Ting Zhang Chaoyu Xiang Yu‑Mo Zhang laboratory of Optoelectronic information Technology and Devices Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201People’s Republic of China Hangzhou Bay laboratory of Advanced Nano‑Optoelectronic Materials and Devices Qianwan Institute of CNITECHNingbo 315336People’s Republic of China Smart Materials for Architecture research lab Innovation Center of Yangtze River DeltaZhejiang UniversityJiaxing 314100People’s Republic of China University of Science and Technology of China Hefei 230026People’s Republic of China State Key lab of Supramolecular Structure and Materials College of ChemistryJilin UniversityChangchun 130012People’s Republic of China

High-resolution non-emissive displays based on electrochromic tungsten oxides(WOx)are crucial for future near-eye virtual/augmented reality interactions,given their impressive attributes such as high environmental stability,ideal outdoor readability,and low energy ***,the limited intrinsic structure of inorganic materials has presented a significant challenge in achieving precise patterning/pixelation at the micron ***,we successfully developed the direct photolithography for WOx nanoparticles based on in situ photo-induced ligand *** strategy enabled us to achieve ultra-high resolution efficiently(line widthion for reported inorganic electrochromic materials).Additionally,the resulting device exhibited impressive electrochromic performance,such as fast response(igh coloration efficiency(119.5 cm^(2) C^(−1)),good optical modulation(55.9%),and durability(>3600 cycles),as well as promising applications in electronic logos,pixelated displays,flexible electronics,*** success and advancements presented here are expected to inspire and accelerate research and development(R&D)in high-resolution non-emissive displays and other ultra-fine micro-electronics.

关键词： Electrochromic Direct photolithography WOx nanoparticles in situ photo-induced ligand exchange High-resolution displays

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