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Eggshell-inspired membrane—shell strategy for simultaneously improving the sensitivity and detection range of strain sensors

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Science China Materials 2021年第3期64卷 717-726页

作者： Hongwei Li Ziting Tan Liqian Yuan Jie Li Xiaosong Chen Deyang Ji Kai Zhang Wenping Hu Liqiang Li Advanced Nano-materials Division Suzhou Institute of Nano-Tech and Nano-Bionics(SINANO)Chinese Academy of Sciences(CAS)Suzhou215123China Tianjin Key Laboratory of Molecular Optoelectronic Sciences Department of ChemistryInstitute of Molecular Aggregation ScienceTianjin UniversityTianjin300072China i-lab SINANOCASSuzhou215123China International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education Institute of Microscale OptoelectronicsShenzhen UniversityShenzhen518060China

The tradeoff between sensitivity and detection range(maximum and minimum stretchability)is a key limitation in strain sensors;to resolve this,we develop an efficient and novel strategy herein to fabricate a highly sensitive and stretchable strain sensor inspired by the membrane-shell structure of poultry *** developed sensor comprises a soft and stretchable surface-grafting polypyrrole(s-PPy)film(acting as the membrane)and a brittle Au film(acting as the shell),wherein both films complement each other at the electrical and mechanical *** forms cracks under strain contributing to its high sensitivity and low detection limit,and s-PPy can bridge Au cracks and increase stretchability which has not been used in strain sensors *** surface-grafting strategy not only enhances interface adhesion but also tunes the brittle property of native PPy to render it *** the synergetic effect of the membrane-shell complementary structure,the strain sensors achieve ultrahigh sensitivity(>10^(7)),large stretchability(100%),and an ultralow detection limit(0.1%),demonstrating significant progress in the field of strain *** membrane-shell(Au/s-PPy)-structured strain sensor can successfully detect finger motion,wrist rotation,airflow fluctuation,and voice vibration;these movements produce strain in the range of subtle to marked *** evidence the ultrahigh performance and bright application prospects of the developed strain sensors.

关键词： strain sensor detection range high sensitivity surface-grafting membrane-shell

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Surface cleaned Cu_(x)Pd_(y)alloy:Synthesis and their superior performances in hydrogen evolution reaction and biosensor

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Nano Research 2023年第5期16卷 7941-7949页

作者： Xinmei Liu Xue Li Wenlong Yang Gang Liu Yu Wang Yuhang Zuo Harbin University of Science and Technology Harbin 150001China Jiangsu Zhongsheng Gaoke Environment Co. Ltd.Wuxi 214244China

High cost and restricted activity of electrocatalysis are the major challenges for hydrogen generation and *** this work,we provided a one-pot synthesis of Cu_(x)Pd_(y)alloy nanoparticles(NPs)with controllable atomic ratio and“clean surface”.Benefiting from the preferable d-band structure,the Cu_(62)Pd_(38)NPs exhibited a lower overpotentials in the hydrogen evolution reaction(HER)over the full pH *** the acidic media,Cu_(62)Pd_(38)NPs achieved a low overpotential of 28.12 mV for HER,which was 25.73%of Pd *** the neutral solution,the overpotential by Cu_(62)Pd_(38)NPs is only 41.71%for that by uncleaned CuPd *** alkaline media,the overpotential by Cu_(62)Pd_(38)NPs was declined from 38.01 to 20.20 mV after 720 min yielding hydrogen,which was only 53.14%for the initial *** applied in biosensor,the synergistic effect of Cu and Pd accelerated the kinetics of electrocatalytic process,resulting in an enhanced *** glucose sensor constructed by Cu_(67)Pd_(33)exhibited a wider detection range up to 100.0 *** the sensitivity is 379.4μA/(mM·cm^(2)),which is ca.4.63 and 14.09 folds for that by pure Cu NPs and Pd NPs,*** optimal atomic percent would be conducive to optimize electrocatalytic activity of Cu_(x)Pd_(y)*** volcano plots for Cu_(x)Pd_(y)would open up a new avenue for designing electrocatalysis with rationalized cost and optimized performance.

关键词： alloy biosensor hydrogen evolution reaction overpotential detection range

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Characteristics of Surface Plasmon Resonance Imaging lnterferometer

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稀有金属材料与工程 2006年第A3期35卷 595-599页

作者： Wei Xing Deng Yan Liu Fangfang Yu Xinglong Dept. of Precision Instruments Tsinghua University Beijing 100084 China

In recent life science research,identifying and characterizing entire biomolecular interaction networks is prerequisite to understanding cellular processes on a molecular and biophysical level.A surface plasmon resonance (SPR) imaging interferometer based on spatial phase modulation detection is presented to meet this *** this method,the SPR sensing chip surface is illuminated with collimated parallel light beam,and a Wollaston prism is introduced into the reflected light path to produce the interference of polarized light reflected from SPR sensing *** of biomolecular interactions can be obtained by extracting the phase change from the SPR interference *** our interferometer,we made experiments on a series concentration of NaCl solutions to investigate its detection range,linearity,sensitivity and *** results indicate that the SPR imaging interferometer is mainly sufficient for biomolecular interaction detection.

关键词： surface plasmon resonance(SPR) detection range linearity sensitivity resolution

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Advances in nanoprobes-based immunoassays

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BMEMat(BioMedical Engineering Materials) 2024年第1期2卷 49-75页

作者： Lusi Zhang Bin Huang Jing Jin Yan Li Ning Gu Jiangsu Key Laboratory for Biomaterials and Devices School of Biological Science and Medical EngineeringSoutheast UniversityNanjingChina School of Biomedical Engineering and Informatics Nanjing Medical UniversityNanjingChina Nanjing RealMind Biotech Co. Ltd.Nanjing Economic and Technological Development ZoneNanjingChina Medical School Nanjing UniversityNanjingChina

Immunoassay is a powerful technique that uses highly specific antigenantibody interactions to detect biochemical targets such as proteins and *** a diagnostic tool,immunoassay is employed in the screening,diagnosis,and prognosis of diseases,which are crucial for the grasp and control of patient conditions in clinical *** the rapid development of nanotechnology,immunoassays based on nanoprobes have attracted more and more attention due to the advantages of high sensitivity,specificity,stability,and *** nanoprobes are nanoscale particles that can act as signal carriers or targeting agents for *** this paper,we review the recent advances in various types of nanoprobes for immunoassays,such as colloidal gold,quantum dots,magnetic nanoparticles,nanozymes,aggregation-induced emission,and up-conversion *** effect of the nanoprobe construction and synthesis methods on their detection performance deserves to be studied in *** also compare their detection ranges and limits in different immunoassay methods,such as lateral flow immunoassays,fluorescent immunoassays,and surface-enhanced Raman scattering ***,we discuss the benefits and challenges of nanoprobes in immunoassays and provide insights into their future *** study aims to offer a comprehensive and critical perspective on the role of nanoprobes in the field of immunoassays.

关键词： detection range immunoassay limit of detection nanoprobes

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