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Sandpaper-templated Stretchable Immunosensing Electr.des for Sub-picomolar Progesterone Detection

CHEMICAL RESEARCH IN CHINESE UNIVERSITIES 2024年第5期40卷 874-880页

作者： Li, Zhaoxian Meng, Xingyu Fang, Chuyao Yi, Zhenkai Wu, Yaoyao Liu, Xuanxuan Zhong, Wei Zhang, Limei Xie, Zhuang Sun Yat sen Univ Sch Mat Sci & Engn Key Lab Polymer Composite & Funct Mat Minist Educ Guangzhou 510275 Peoples R China Sun Yat sen Univ Affiliated Hosp 1 Reprod Med Ctr Dept Obstet & Gynecol Guangzhou 510080 Peoples R China

Female hormone detection, particularly non-invasive monitoring progesterone (P4) levels in body fluids, plays a critical role in female health management and disease diagnosis. However, the challenge still exists because of the ultralow abundance of P4 (ctr.de designed for ultra-sensitive detection of P4 at sub-picomolar level. A molding technique is employed to replicate the sandpaper textures to provide a microstructured elastomeric substrate for electr.de preparation. Such microstructured surface coated with poly(3,4-ethylenedioxythiophene):poly(4-styrenesulfonate) (PEDOT:PSS)/LiTFSI [LiTFSI=lithium bis(trifluoromethanesulfonyl) imide] provided a stretchable polymer electr.de with high conductivity, and further decoration with gold nanoparticles (AuNPs) enabled the immunosensing for P4 by electr.chemical impedance spectr.scopy (EIS) measurements. Through adjusting the AuNPs deposition conditions, ultrasensitive detection of P4 is realized with a low limit of detection (LOD) of ca. 10 fmol/L and a tunable dynamic range up to mol/L. Notably, the stretchable electr.de exhibits stable electr.chemical performance, enabling the detection of P4 at sub-picomolar levels even under mechanical strain of 30%. This innovative electr.chemical sensor holds significant promise for non-invasive, on-site monitoring of P4 levels in healthcare, as well as hormone detection in food safety and environment surveillance.

关键词： Progesterone Immunosensor Microstructured electr.de Stretchable biosensor Electr.chemical sensing ELEctr.CHEMICAL SENSOR BIOSENSOR ESTRADIOL HORMONES

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Multistage Microstructured Ionic Skin for Real-Time Vital Signs Monitoring and Human-Machine Interaction

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ENERGY & ENVIRONMENTAL mat.RIALS 2024年第6期7卷 218-229页

作者： Wang, Xueke Zi, Jinyu Chen, Yi Wu, Qiang Xiang, Zhimin Tu, Yongqiang Yang, Peng Wan, Yanfen Yunnan Univ Sch Mat & Energy Natl Ctr Int Res Photoelect & Energy Mat Yunnan Key Lab Electromagnet Mat & DevicesYunnan Kunming 650091 Peoples R China

Skin-like electr.nics research aiming to mimic even surpass human-like specific tactile cognition by operating perception-to-cognition-to-feedback of stimulus to build intelligent cognition systems for certain imperceptible or inappreciable signals was so attractive. Herein, we constructed an all-in-one tri-modal pressure sensing wearable device to address the issue of power supply by integrating multistage microstructured ionic skin (MM i-skin) and thermoelectr.c self-power staffs, which exhibits high sensitivity simultaneously. The MM i-skin with multi-stage "interlocked" configurations achieved precise recognition of subtle signals, where the sensitivity reached up to 3.95 kPa-1, as well as response time of 46 ms, cyclic stability (over 1500 cycles), a wide detection range of 0-200 kPa. Furthermore, we developed the thermoelectr.city nanogenerator, piezoelectr.city nanogenerator, and piezocapacitive sensing as an integrated tri-modal pressure sensing, denoted as P-iskin, T-iskin, and C-iskin, respectively. This multifunctional ionic skin enables real-time monitoring of weak body signals, rehab guidance, and robotic motion recognition, demonstrating potential for Internet of things (IoT) applications involving the artificial intelligence-motivated sapiential healthcare Internet (SHI) and widely distributed human-machine interaction (HMI). Inspired by the multi-level interlocking structure in human skin, the microlevel multi-stage "interlocked" configuration ionic skin is prepared by the bio-template method, and an all-in-one tri-modal pressure sensing wearable device was constructed by integrating thermoelectr.city nanogenerator, piezoelectr.city nanogenerator, and piezocapacitive sensing, which demonstrates the potential for addressing the issue of power supply and Internet of things applications. image

关键词： bio-template method integrated device ionic skin skin-like microstructure tri-modal pressure sensing PRESSURE SENSOR FILMS PVDF

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A New Method to Track Resin Flow Fronts in Mold Filling Simulation of RTM Process

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Journal of mat.rials Science & Technology 2004年第3期20卷 335-340页

作者： Fuhong DAI Shanyi DU Boming ZHANG Dianfu WAN Ceater for composite mat.rials, Harbin Institute of Technology,Harbin 150001,China ctr. for composite mat. Harbin Inst. of Technol. Harbin 150001 China

A new method to track resin flow fronts, referred to as the topological interpolated method (TIM), which is based onfilling states and topological relations of adjacent nodes was proposed. An experiment on the mould filling process wasconducted. It was compared with exact solutions and the experimental results, and good agreements were observed.Numerical and experimental comparisons with the conventional contour mat.od were also carried out, and it showedthat TIM could enhance the local accuracy of flow front solutions with respect to the contour method when mergingflow fronts and resin approaching the mold wall were involved.

关键词： Flow front Resin transfer molding (RTM) Simulation Finite elemeat/control volume method (FE/CVM)

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Effects of Cure Pressure Induced Voids on the Mechanical Strength of Carbon/Epoxy Laminates

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Journal of mat.rials Science & Technology 2005年第1期21卷 87-91页

作者： Ling LIU, Boming ZHANG, Zhanjun WU and Dianfu WANGCenter for composite mat.rials, Harbin Institute of Technology, Harbin 150001, ChinaProf., ctr. for composite mat. Harbin Inst. of Technol. Harbin 150001 China

This work aims at designing a set of curing pressure routes to produce laminates with various void contents. The effects of various consolidation pressures resulting in different void contents on mechanical strength of carbon/epoxy laminates have been examined. Characterization of the voids, in terms of void volume fraction, void distribution, size, and shape, was performed by standard test, ultrasonic inspection and metallographic analysis. The interlaminar shear strength was measured by the short-beam method. An empirical model was used to predict the strength vs porosity. The predicted strengths conform well with the experimental data and voids were found to be uniformly distributed throughout the laminate.

关键词： Carbon/epoxy laminates Autoclave curing Void Mechanical strength

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Lithium Salt Combining Fluoroethylene Carbonate Initiates Methyl Methacrylate Polymerization Enabling Dendrite-Free Solid-State Lithium Metal Battery

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ENERGY & ENVIRONMENTAL mat.RIALS 2024年第6期7卷 50-59页

作者： Ye, Xue Liang, Jianneng Du, Baorong Li, Yongliang Ren, Xiangzhong Wu, Dazhuan Ouyang, Xiaoping Zhang, Qianling Liu, Jianhong Zhejiang Univ Inst Proc Equipment Coll Energy Engn Hangzhou 310000 Peoples R China Shenzhen Univ Coll Chem & Environm Engn Graphene Composite Res Ctr Shenzhen 518061 Peoples R China

This work demonstrates a novel polymerization-derived polymer electr.lyte consisting of methyl methacrylate, lithium bis(trifluoromethanesulfonyl)imide and fluoroethylene carbonate. The polymerization of MMA was initiated by the amino compounds following an anionic catalytic mechanism. LiTFSI plays both roles including the initiator and Li ion source in the polymer electr.lyte. Normally, lithium bis(trifluoromethanesulfonyl)imide has difficulty in initiating the polymerization reaction of methyl methacrylate monomer, a very high concentration of lithium bis(trifluoromethanesulfonyl)imide is needed for initiating the polymerization. However, the fluoroethylene carbonate additive can work as a supporter to facilitate the degree of dissociation of lithium bis(trifluoromethanesulfonyl)imide and increase its initiator capacity due to the high dielectr.c constant. The as-prepared poly-methyl methacrylate-based polymer electr.lyte has a high ionic conductivity (1.19 x 10-3 S cm-1), a wide electr.chemical stability window (5 V vs Li+/Li), and a high Li ion transference number (tLi+$$ {t}_{{\mat.rm{Li}}{+}} $$) of 0.74 at room temperature (RT). Moreover, this polymerization-derived polymer electr.lyte can effectively work as an artificial protective layer on Li metal anode, which enabled the Li symmetric cell to achieve a long-term cycling performance at 0.2 mAh cm-2 for 2800 h. The LiFePO4 battery with polymerization-derived polymer electr.lyte-modified Li metal anode shows a capacity retention of 91.17% after 800 cycles at 0.5 C. This work provides a facile and accessible approach to manufacturing poly-methyl methacrylate-based polymerization-derived polymer electr.lyte and shows great potential as an interphase in Li metal batteries. Polymerizing monomers/oligomers using Li salts as the initiators has significant meaning in avoiding the introduction of impurities and improves interface stability between the electr.des and polymerization-derived polymer electr.lyte (PDP

关键词： in situ polymerization lithium anode polymer electr.lyte solid-state lithium batteries ENERGY-DENSITY LITHIUM IN-SITU FORmat.ON HIGH-PERFORMANCE ELEctr.LYTES ANODES

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Non-invasive Healthcare Analytical Platform Based on Organic Electr.chemical Transistors

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CHEMICAL RESEARCH IN CHINESE UNIVERSITIES 2024年第5期40卷 824-841页

作者： Hu, Xingyu Mao, Ning Yan, Xinwen Huang, Ling Liu, Xu Yang, Huige Sun, Qingqing Liu, Xuying Jia, Hanyu Zhengzhou Univ Sch Mat & Engn Zhengzhou 450001 Peoples R China Longmen Lab Sci & Technol Innovat Ctr Adv Mat Intelligent Equi Luoyang 471000 Peoples R China South Cent Univ Nationalities Hubei R&D Ctr Hyperbranched Polymers Synth & Appli Key Lab Catalysis & Energy Mat Chem Minist Educ Wuhan 430074 Peoples R China South Cent Univ Nationalities Hubei R&D Ctr Hyperbranched Polymers Synth & Appli Hubei Key Lab Catalysis & Mat Sci Wuhan 430074 Peoples R China

Non-invasive bioelectr.nics, especially organic electr.chemical transistors (OECTs), have drawn extensive attentions of academical and medical communities by virtue of their efficient bio-electr.nic interfacing, water-involved ionic transport, excellent ionic-electr.nic coupling, ultralow power consumption, wide detectable range, and outstanding detection sensitivity. Designable structure diversity, low-temperature solution processability, facile bio/chemical functionalization, and excellent biocompatibility of organic mixed ionic-electr.nic conductors (OMIECs) render OECTs particularly suitable for non-invasive or minimally invasive healthcare analytical platform. Here, we comprehensively review recent advances of the non-invasive analytical healthcare applications based on OECTs, especially on the detection of biomarkers or metabolites in the excretory biofluids, as well as the recording of electr.physiological signals. A brief introduction of OECT and its comparison with other organic thin-film transistors upon device configuration and working mechanism are firstly discussed. State-of-the-art non-invasive OECT-based biosensors are summarized on their detection of ionic and molecular biomarkers, following with circuit design strategies of OECTs for real-time and in-situ electr.physiological recording from skin surface. In conclusion, remaining barriers and future challenges of non-invasive OECT-based bioelectr.nics towards lower detection limit, more accurate quantitative relationship between analyte concentrations and measured parameters, more intimat. device-tissue interface, and long-term operation stability are deeply analyzed with a critical outlook.

关键词： Organic electr.chemical transistor Non-invasive Bioelectr.nics Ion-selective Electr.physiological monitoring SENSITIVITY ION DETECTION

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A Tri-Salt composite Electr.lyte with Temperature Switch Function for Intelligently Temperature-Controlled Lithium Batteries

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ENERGY & ENVIRONMENTAL mat.RIALS 2024年第6期7卷 84-93页

作者： Fu, Ende Wang, Huimin Zhang, Yating Xiao, Zhenxue Zheng, Xiu Hao, Shuai Gao, Xueping Nankai Univ Inst New Energy Mat Chem Sch Mat Sci & Engn Tianjin 300350 Peoples R China

The intense research of lithium-ion batteries has been motivated by their successful applications in mobile devices and electr.nic vehicles. The emerging of intelligent control in kinds of devices brings new requirements for battery systems. The high-energy lithium batteries are expected to respond or react under different environmental conditions. In this work, a tri-salt composite electr.lyte is designed with a temperature switch function for intelligently temperature-controlled lithium batteries. Specifically, the halide Li3YBr6 together with LiTFSI and LiNO3 works as active fillers in a low-melting-point polymer mat.ix (polyethyleneglycol dimethyl ether (PEGDME) and polyethylene oxide (PEO)), which is further filled into the pre-lithiated alumina fiber skeleton. Above 60 degrees C, the composite electr.lyte exists in the liquid state and fully contacts with the working electr.des on the liquid-solid interface, effectively minimizing the interfacial resistance and leading to high discharge capacity in the cell. The electr.lyte is changed into a solid state below 30 degrees C so that the ionic conductivity is significantly reduced and the interface resistance is increased dramat.cally on the solid-solid interface. Therefore, by simply adjusting the temperature, the cell can be turned "ON" or "OFF" intentionally. This novel function of the composite electr.lyte has enlightening significance in developing intelligently temperature-controlled lithium batteries. A tri-salt composite electr.lyte is developed by adding Li3YBr6, LiTFSI, and LiNO3 into PEGDME/PEO. It reversibly transforms between solid and liquid through adjusting the temperature, with lithium-ion conductivity and interfacial contact dramat.cally changed. Correspondingly, the cells are blocked or conductive as turning "off" and "on" reversibly and flexibly. This switch function shows great potential for developing intelligently temperature-controlled lithium batteries. image

关键词： composite electr.lyte halide electr.lyte low melting point solid-state battery temperature switch function SOLID POLYMER ELEctr.LYTES IONIC-CONDUCTIVITY RECENT PROGRESS COMPATIBILITY INTERFACE NANOWIRES CATHODE SIO2

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Boron Nitride-Integrated Lithium Batteries: Exploring Innovations in Longevity and Performance

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ENERGY & ENVIRONMENTAL mat.RIALS 2024年第6期7卷 13-40页

作者： Angizi, Shayan Alem, Sayed Ali Ahmad Torabian, Mahdi Khalaj, Maryam Golberg, Dmitri Pakdel, Amir McMaster Univ Dept Chem Engn 1280 Main St W Hamilton ON L8S 4L7 Canada Montan Univ Leoben Inst Chem Polymer Mat Otto Glockel Str 2 A-8700 Leoben Austria Politecn Milan Dept Chem Mat & Chem Engn Piazza Leonardo Vinci 32 I-20133 Milan Italy Northwestern Univ Dept Mat Sci & Engn Evanston IL 60208 USA Queensland Univ Technol QUT Ctr Mat Sci 2 George Brisbane Qld 4000 Australia Queensland Univ Technol QUT Sch Chem & Phys 2 George Brisbane Qld 4000 Australia Natl Inst mat.Sci NIMS Res Ctr Mat Nanoarchitecton MANA Namiki 1 Ibaraki 3050044 Japan Univ Dublin Trinity Coll Dublin Dept Mech Mfg & Biomed Engn Dublin D02PN40 Ireland

The current global warming, coupled with the growing demand for energy in our daily lives, necessitates the development of more efficient and reliable energy storage devices. Lithium batteries (LBs) are at the forefront of emerging power sources addressing these challenges. Recent studies have shown that integrating hexagonal boron nitride (h-BN) nanomat.rials into LBs enhances the safety, longevity, and electr.chemical performance of all LB components, including electr.des, electr.lytes, and separators, thereby suggesting their potential value in advancing eco-friendly energy solutions. This review provides an overview of the most recent applications of h-BN nanomat.rials in LBs. It begins with an informat.ve introduction to h-BN nanomat.rials and their relevant properties in the context of LB applications. Subsequently, it addresses the challenges posed by h-BN and discusses existing strategies to overcome these limitations, offering valuable insights into the potential of BN nanomat.rials. The review then proceeds to outline the functions of h-BN in LB components, emphasizing the molecular-level mechanisms responsible for performance improvements. Finally, the review concludes by presenting the current challenges and prospects of integrating h-BN nanomat.rials into battery research. Integrating h-BN into lithium batteries enhances safety, longevity, and mechanical integrity of battery components by mitigating dendritic growth and side reactions. Its high ionic and thermal conductivities improve lithium transference and heat management, enhancing performance and reliability. image

关键词： electr.de electr.lyte hexagonal boron nitride lithium battery separator METAL BATTERIES H-BN ION BATTERIES 2-DIMENSIONAL mat.RIALS POLYMER ELEctr.LYTE HIGH-TEMPERATURE ANODES NANOSHEETS DENDRITE FUNCTIONALIZATION

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Enhanced Electr.cal Properties of Bi2-xSbxTe3 Nanoflake Thin Films Through Interface Engineering

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ENERGY & ENVIRONMENTAL mat.RIALS 2024年第6期7卷 359-366页

作者： Wu, Xudong Ding, Junjie Cui, Wenjun Lin, Weixiao Xue, Zefan Yang, Zhi Liu, Jiahui Nie, Xiaolei Zhu, Wanting Van Tendeloo, Gustaaf Sang, Xiahan Wuhan Univ Technol State Key Lab Adv Technol Mat Synth & Proc Wuhan 430070 Peoples R China Wuhan Univ Technol NRC Nanostruct Res Ctr Wuhan 430070 Peoples R China Univ Antwerp EMAT Electron Microscopy Mat Sci Groenenborgerlaan 171 B-2023 Antwerp Belgium

The structure-property relationship at interfaces is difficult to probe for thermoelectr.c mat.rials with a complex interfacial microstructure. Designing thermoelectr.c mat.rials with a simple, structurally-uniform interface provides a facile way to understand how these interfaces influence the transport properties. Here, we synthesized Bi2-xSbxTe3 (x = 0, 0.1, 0.2, 0.4) nanoflakes using a hydrothermal method, and prepared Bi2-xSbxTe3 thin films with predominantly (0001) interfaces by stacking the nanoflakes through spin coating. The influence of the annealing temperature and Sb content on the (0001) interface structure was systemat.cally investigated at atomic scale using aberration-corrected scanning transmission electr.n microscopy. Annealing and Sb doping facilitate atom diffusion and migration between adjacent nanoflakes along the (0001) interface. As such it enhances interfacial connectivity and improves the electr.cal transport properties. Interfac reactions create new interfaces that increase the scattering and the Seebeck coefficient. Due to the simultaneous optimization of electr.cal conductivity and Seebeck coefficient, the maximum power factor of the Bi1.8Sb0.2Te3 nanoflake films reaches 1.72 mW m(-1) K-2, which is 43% higher than that of a pure Bi2Te3 thin film.

关键词： Bi2Te3 nanoflakes interface engineering scanning transmission electr.n microscopy thermoelectr.c thin film HIGH-THERMOELEctr.C PERFORMANCE POWER-GENERATION 2D mat.RIALS GROWTH BISMUTH TELLURIDE NANOPLATELETS MECHANISMS NANOSHEETS MAGNETISM

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Resist Thermal Shock Through Viscoelastic Interface Encapsulation in Perovskite Solar Cells

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ENERGY & ENVIRONMENTAL mat.RIALS 2024年第6期7卷 238-245页

作者： Ma, Sai Tang, Jiahong Yuan, Guizhou Zhang, Ying Wang, Yan Wu, Yuetong Zhu, Cheng Wang, Yimiao Wu, Shengfang Lu, Yue Chi, Shumeng Song, Tinglu Zhou, Huanping Sui, Manling Li, Yujing Chen, Qi Beijing Inst Technol Sch Mat Sci & Engn Beijing Key Lab Construct Tailorable Adv Funct Mat MIIT Key Lab Low Dimens Quantum Struct & DevicesE Beijing 100081 Peoples R China Beijing Univ Technol Coll Mat Sci & Engn Beijing Key Lab Microstruct & Properties Solids Beijing 100124 Peoples R China Jiangnan Univ Anal & Testing Ctr Wuxi 214122 Peoples R China Peking Univ Sch Mat Sci & Engn Beijing 100871 Peoples R China

Enhancing the lifetime of perovskite solar cells (PSCs) is one of the essential challenges for their industrialization. Although the external encapsulation protects the perovskite device from the erosion of moisture and oxygen under various harsh conditions. However, the perovskite devices still undergo static and dynamic thermal stress during thermal and thermal cycling aging, respectively, resulting in irreversible damage to the morphology, component, and phase of stacked mat.rials. Herein, the viscoelastic polymer polyvinyl butyral (PVB) mat.rial is designed onto the surface of perovskite films to form flexible interface encapsulation. After PVB interface encapsulation, the surface modulus of perovskite films decreases by nearly 50%, and the interface stress range under the dynamic temperature field (-40 to 85 degrees C) drops from -42.5 to 64.8 MPa to -14.8 to 5.0 MPa. Besides, PVB forms chemical interactions with FA+ cations and Pb2+, and the macroscopic residual stress is regulated and defects are reduced of the PVB encapsulated perovskite film. As a result, the optimized device's efficiency increases from 22.21% to 23.11%. Additionally, after 1500 h of thermal treatment (85 degrees C), 1000 h of damp heat test (85 degrees C & 85% RH), and 250 cycles of thermal cycling test (-40 to 85 degrees C), the devices maintain 92.6%, 85.8%, and 96.1% of their initial efficiencies, respectively. Viscoelastic PVB mat.rial is innovatively designed to form a flexible interface encapsulation. The Surface modulus and interface stress concentration zone are effectively alleviated. The stability breakthroughs in IEC 61215 (thermal treatment at 85 degrees C, damp heat test (85 degrees C & 85% RH), thermal cycling test (-40 to 85 degrees C)) has achieved through the systemic encapsulation by combining internal and external encapsulation. image

关键词： device stability perovskite solar cells stress field surface modulus thermal shock STABILITY

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