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A SERS-Fluorescence dual-mode fiber sensor for monitoring in FRET system

MICROCHEMICAL JOURNAL 2025年 212卷

作者： Zheng, Zhihan Liu, Yan Li, Minglu Chen, Huifang Chen, Shen Lin, Chengqi Jiang, xiaowei Lin, Huihuang Hong, Simin Broderick, Neil G. R. xu, Ben Kang, Juan Zhao, Chunliu Wang, Yi China Jiliang Univ Coll Opt & Elect Technol Hangzhou 310018 Peoples R China Zhejiang Univ Coll Pharmaceut Sci Hangzhou 310058 Peoples R China Univ Auckland Dept Phys Auckland New Zealand Univ Auckland Dodd Walls Ctr Excellence Photon & Quantum Technol Auckland New Zealand

In a complex Forster resonance energy transfer (FRET) system, it is necessary to monitor the composition change, chemical structural construction or intermolecular interactions. The fluorescence detecting method is not sufficient to supply such information. In this paper, a dual-mode fiber sensor for monitoring in FRET system is proposed. SERS and fluorescence detection can be realized with only one fiber probe. The sensor was designed on separated regions for each mode detections. The sensing capacities was tested, the lowest LOD was calculated to be 1.38 x 10-14 M in SERS detections. A FRET system was simulated with Rhodamine 6G (R6G) and Rhodamine B (RhB). There are FRET, spectra overlap, and competition on substrate between the two dyes, which makes the mixture a typical and complex FRET system. With the proposed sensor, the fluorescence intensity change was monitored, at the same time, a small portion of R6G (1/500 in high concentration and 1/105 in low concentration) in the mixture be recognized with SERS detection. We further detected the illegal addition of Rhodamine in commercially available 100 % orange juice. Even when fluorescence could not detect it, R6G could still be effectively detected by SERS method at a concentration of 10-10 M. By the help of this dual-mode sensing device, the process of chemical reaction in FRET system could be monitored, and more widely applications of FRET technique could be realized.

关键词： Forster Resonance Energy Transfer Surface Enhanced Raman Scattering Dual-mode sensor In Situ Chemical Reaction Monitoring Low LOD

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A 32×32 SPAD LiDAR sensor with In-pixel Spatial-temporal Coincidence and Per-SPAD Pulse Delay for Resolution-lossless Imaging

A 32×32 SPAD LiDAR Sensor with In-pixel Spatial-temporal Co...

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2024 IEEE Asian Solid-State Circuits conference, A-SSCC 2024

作者： Chen, Bu Huang, Zhangcheng Wang, Jingyi Shang, Hongyang Lv, Hankun Liu, Qi Liu, Ming State Key Lab of Integrated Chips and Systems Frontier Institute of Chip and System Fudan University China

ISBN: (纸本)9798350376326

Single-photon Avalanche Diode (SPAD)-based LiDAR technology finds significant applications in advanced driver assistance systems, etc. Extracting distance information necessitates creating a histogram from enormous frames to filter out the overwhelming background light (BGL) data. As the formats of SPAD pixel arrays scaling up [1], the processing, storage, and transmission of extensive data result in ultra-high power consumption and increased layout area. In order to reduce BGL, previous studies [2][3] [4] have leveraged spatial coincidence and histograms in pixels, and [5] utilized external double pulses to enhance the signal-to-noise ratio. However, a significant amount of data still needs to be processed within the sensor. To address these challenges, this paper presents a 32 × 32 SPAD LiDAR sensor that incorporates in-pixel spatial-temporal coincidence to effectively compress random background light and a per-SPAD pulse delay method to realize resolution-lossless imaging. This approach achieves an impressive 98.3% compression rate of background light under 100 klux illumination while maintaining a low power consumption of 14.6 μW per pixel. © 2024 IEEE.

关键词： advanced driver assistance systems

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Tactile-Guided Automated Robotic Wiping 11

Tactile-Guided Automated Robotic Wiping

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11th IEEE International conference on Cybernetics and Intelligent systems (CIS) / 11th IEEE International conference on Robotics, Automation and Mechatronics (RAM)

作者： xu, Lan Liang, Wenyu Lee, Tong Heng Natl Univ Singapore Dept Elect & Comp Engn Singapore Singapore

ISBN: (纸本)9798350364200;9798350364194

To automate the wiping task using robots, it is crucial to endow the robot with the capability to maintain desired contact with target surfaces. However, challenges arise when geometric priors and visual feedback are not available or when detailed object information is needed. In this paper, a tactile-guided hybrid pose/force control scheme based on gain-scheduling proportional-integral-derivative (PID) is proposed to address these challenges. Leveraging a tactile sensor, three features are extracted from the tactile data and used in the control loop. The control scheme regulates the contact normal force on unknown surfaces with slowly changing curvature while following a trajectory on the surface. It also allows real-time adaptation of the desired contact force to varying surface conditions. The performance of the proposed scheme is evaluated on a robot manipulator equipped with a tactile sensor. Experimental results show that the proposed system can identify stains, guide itself to re-clean areas, and successfully accomplish the wiping task.

关键词： Manipulation sensor-based control applications

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Hydrogen sensor based on Planar Polymer Bragg Grating coated with Pd/Ni composite film 12

Hydrogen sensor based on Planar Polymer Bragg Grating coated...

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conference on advanced sensor systems and applications xII

作者： Zhou, Yong Hu, Wenbin Ye, Yongxin Wang, Jingjing Dai, Jixiang Yang, Minghong Hellmann, Ralf Kefer, Stefan Wuhan Univ Technol Natl Engn Res Ctr Fiber Opt Sensing Technol & Net Wuhan 430070 Hubei Peoples R China Aschaffenburg Univ Appl Sci Appl Laser & Photon Grp Aschaffenburg Germany

ISBN: (纸本)9781510657090;9781510657083

As one of the cleanest energy sources in the 21st century, the development of hydrogen energy has attracted the attention of all countries in the world, so the monitoring of hydrogen leakage has become a current research focus. This study demonstrates a novel hydrogen sensor that combines a planar polymer grating with a Pd/Ni hydrogen-sensitive material that takes advantage of the hydrogen-absorbing expansion properties of Pd to cause the central wavelength drift of Planar Polymer Bragg Grating (PPBG) by strain transformation. The experimental results show when the hydrogen concentration is 0.3%, 0.6% and 1%, the wavelength shift of the sensor is 50 pm, 85 pm and 110 pm respectively, and the response time is approximately 30 seconds. This hydrogen sensor has the advantages of high sensitivity, low cost and compact structure, leading to great potential in industrial applications.

关键词： PPBG Hydrogen sensor Pd/Ni composite film

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A review on recent techniques developed for energy conservation in Wireless sensor Networks

A review on recent techniques developed for energy conservat...

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2023 International conference on Intelligent systems, advanced Computing and Communication, ISACC 2023

作者： Basumatary, Habila Chowdhuri, Rajib Deb Barma, Mrinal Kanti Tezpur University Department of Computer Science and Engineering Assam India National Institute of Technology Department of Computer Science and Engineering Agartala India

ISBN: (纸本)9798350399387

In modern days, with the fastest growing technology trends, the benefits of Wireless sensor Networks (WSNs) are also increasing rapidly. In these networks, very small-sized wireless sensor nodes are used widely which are capable of sensing and doing computations. These sensor nodes are resource-limited in nature i.e., they have limited storage capacity, power supply, computation capability, bandwidth, etc. WSNs are mostly used in outdoor application areas like environmental monitoring, land mines detections or different military applications where the power supply to the sensor nodes does the major role. In these applications, without any external power supply, the sensor nodes run the whole network by collecting data from its surroundings and also communicate these data to the end-user. Hence, conserving energy for the sensor nodes is one of the most challenging tasks in WSNs. In this paper, we have done detailed study on the existing literature which are proposed with the objective to improve the energy efficiency issue in WSNs. Here, we have selectively highlighted some of the recently proposed methodologies to understand the present research scenario. We have also shown comparative analysis on the techniques and tools which are used to propose these works and their variation of the results are discussed accordingly. © 2023 IEEE.

关键词： Energy efficiency

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Mach-Zehnder interferometer sensor based on tapered DCF for measuring axial strain, bending and magnetic field 14

Mach-Zehnder interferometer sensor based on tapered DCF for ...

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advanced sensor systems and applications xIV 2024

作者： Huang, Huiling Gao, Ling Jiang, Chao Zhang, Han Yan, Tianqi Guo, Zihao Han, Bowen Guo, xiaoshan Sun, Simei Hubei Key Laboratory of Optoelectronic Conversion Materials and Devices Hubei Engineering Research Center for Micronano Optoelectronic Devices and Integration College of Physics and Electronic Science Hubei Normal University Hubei Huangshi435002 China

ISBN: (纸本)9781510682146

A fiber optic Mach-Zehnder interferometer (MZI) sensor with sensitivity to strain, magnetic field, and bending was designed by splicing single-mode fiber (SMF) and dispersion compensation fiber (DCF). MZI is a sandwich structure of "SMF - tapered DCF - SMF". MZI1 and MZI2 are prepared by pulling DCF to different lengths using a fiber optic fusion tapering machine respectively. MZI1 with tapered structure is quite sensitive to axial strain, and the experimentally obtained axial strain sensitivity is -21.6 pm/μϵ. Then, sticking MZI1 and magnetostrictive material together can form a magnetic field sensor. The experiment found that within the range of 15 mT to 140 mT, there is an excellent parabolic fitting relationship between the dip wavelength of MZI1 spectrum and magnetic field intensity, with a fitting coefficient of 0.9997. The curvature of the bending was measured using MZI2, achieving a sensitivity of 10.1 nm/m-1 and a linearity of 0.9906. © 2024 SPIE.

关键词： Mach-Zehnder interferometers

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3D Successive Nanoscale Interactions-Driven Mechanoreceptors with Broad Linear Range and Ultra-High Sensitivity for Efficient Gesture Recognition

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advanced FUNCTIONAL MATERIALS 2025年

作者： Wu, Chenling Zhang, Sen Wang, Yi Wang, Fangjun Wang, Taihong Zhang, Ming Hunan Univ Engn Res Ctr Adv Semicond Technol & Applicat Natl Key Lab Power Semicond & Integrat Technol Minist EducColl SemicondColl Integrated Circuits Changsha 410082 Peoples R China Hunan Univ Sch Phys & Elect Changsha 410082 Peoples R China Southern Univ Sci & Technol Dept Elect & Elect Engn Shenzhen 518055 Guangdong Peoples R China

Wearable biosensing systems for monitoring daily human activities have been extensively investigated by researchers of human-machine interactions. However, the transmission of biomechanical signals is degraded owing to limitations arising from the non-ideal characteristics of hardware, which obstructs the precise recognition of human motions by sensing systems and practical applications. In this study, we demonstrates, for the first time, 3D successive nanoscale interaction-driven artificial slow-adapting (SA) mechanoreceptors to develop a biosensing system integrated with sensing, learning, and computational functionalities for efficient sign-language detection and translation. Specifically, nanocellular graphene (GN) with a high conductivity of 1.26 x 104 S m-1 is constructed via submicron porous template-assisted synthesis. More importantly, by leveraging unique conductive networks driven by 3D successive nanoscale interactions of artificial SA mechanoreceptors, co-optimization of the sensitivity (gauge factor = 242) and linear operating range is achieved, unlike the case of foam GN sensors. An artificial biosensing system (ABSS) based on sensing arrays operating via machine-learning algorithms achieves real-time gesture detection and recognition with 98.8% recognition accuracy. This 3D successive nanoscale template-assisted design strategy may provide a new path toward high-performance ABSS fabrication, thus enabling potential applications in fields such as human-computer interaction, virtual reality, and healthcare.

关键词： artificial biosensing system machine learning nanocellular graphene slow-adapting mechanoreceptor strain sensor

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BIBLIOMETRIC REVIEW OF SMART sensor FOR HEALTH MONITORING

BIBLIOMETRIC REVIEW OF SMART SENSOR FOR HEALTH MONITORING

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International conference on Green Energy, Computing and Intelligent Technology 2024, GEn-CITy 2024

作者： Halim, Christian V. Marinah, Murti Shafira, Dinda A.I. Dwiyantara, Muhammad Y. Abadi, Imam Department of Physics Engineering Faculty of Industrial Technology and Systems Engineering Institut Teknologi Sepuluh Nopember Surabaya Indonesia

ISBN: (纸本)9781837242689

Smart sensors and medical health technologies are becoming increasingly popular due to their potential for real-time, noninvasive health monitoring and diagnostics. With the integration of Artificial Intelligence (AI), these devices can track vital signs and important biomarkers, supporting the management of chronic diseases. This study employs bibliometric analysis using tools like VOSviewer to map research trends in this domain, identifying collaborations, emerging keywords, and contributions from institutions and countries. Findings indicate a significant increase in publications and citations, especially after 2010, highlighting influential journals such as IEEE sensors Journal. The primary focus is on health monitoring applications and advancements in sensor technology, with an increasing use of terms like "machine learning" and "data analytics." These findings provide insights into future research directions and technological innovations that impact medical health applications. It is recommended that future development integrate advanced data processing techniques and apply sensors in infrastructure and smart city environments, aiming to create systems that are more responsive, efficient, and sustainable. © The Institution of Engineering & Technology 2024.

关键词： Electronic health record

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MEDUSE: 10 GHz localized quasi-planar wave measuring bench in order to analyse systems electromagnetic susceptibility 25

MEDUSE: 10 GHz localized quasi-planar wave measuring bench i...

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25th International conference on Electromagnetics in advanced applications, ICEAA 2024

作者： Barouki, Sami Hoffmann, Patrick Reineix, Alain French Alternatives Energies and Atomic Energy Commission CEA DAM Gramat Gramat France Xlim Research Institute CNRS UMR Limoges7252 France

This paper outlines the design of a focused plane-wave illumination bench for studying the electromagnetic susceptibility of electronic systems. The bench consists of a horn antenna and a dielectric lens used to focus... 详细信息

ISBN: (纸本)9798350360974

关键词： Horn antennas

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Low Cost, Flexible, Room Temperature Gas sensor: Polypyrrole-Modified Laser-Induced Graphene for Ammonia Detection

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IEEE sensorS JOURNAL 2024年第7期24卷 9366-9374页

作者： Santos-Ceballos, Jose Carlos Salehnia, Foad Romero, Alfonso Vilanova, xavier Llobet, Eduard Univ Rovira & Virgili Sch Engn Dept Elect Elect & Automat Engn MINOS Res Grp Tarragona 43007 Spain

The electrochemical synthesis of polypyrrole (PPy) on laser-induced graphene (LIG) electrodes is investigated in this study, along with the gas-sensing applications of these modified laser-tailored materials. A simple and scalable method for the low-cost, large-scale production of PPy@LIG nanocomposites (PPy@LIG NCs) is proposed. This nanocomposite is subsequently applied to design chemoresistive flexible gas sensors to detect ammonia (NH3) levels at room temperature. Following a brief gas exposure, PPy@LIG NCs sensors demonstrate changes in resistance with a sensitivity 14 times higher than that of pure LIG. Moreover, excellent repeatability in results and a low detection limit of 1 ppm were achieved. The LIG formation and electrochemical synthesis of PPy were confirmed through Raman spectroscopy and Fourier-transform infrared (FTIR) spectroscopy. The analysis by field emission scanning electron microscope (FE-SEM) and transmission electron microscopy (TEM) verified the formation of PPy@LIG NCs. In conclusion, this work introduces the novel PPy@LIG NCs and its application in gas sensing, showcasing their unique selectivity, enhanced sensitivity, and cost-effective production. These attributes mark a significant step forward, presenting new possibilities for the development of advanced gas-sensing systems aimed at improving air quality monitoring.

关键词： Ammonia (NH3) sensor chronoamperometry (CA) gas sensing laser-induced graphene (LIG) polypyrrole (PPy)

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