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International SoC Design Conference, ISOCC

作者： Ji-Hoon Suh Mauricio Velazquez Lopez Jeong-Ho Park Hyung-Joun Yoo The Department of Electrical Engineering and the Mobile Sensor and IT Convergence Center Korea Advanced Institute of Science and Technology Daejeon Republic of Korea

This paper presents an adaptive signal conditioning method for multi sensors with initial voltage setting, offset calibration and signal amplification. The initial voltage setting process to VDD/2 (600 mV) by level shifters is implemented for adapting various sensor signals, even when the signal's frequency is of several Hz or its initial voltage is of several mV. Offset calibration is implemented inside a programmable gain amplifier to compensate initial voltage setting error. The architecture can amplify various types of sensor signals below supply voltage (1.2 V) without coupling capacitors.

关键词： Electronics packaging Calibration Micromechanical devices

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Scalable one-step wet-spinning of triboelectric fibers for large-area power and sensing textiles

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Nano Research 2023年第5期16卷 7518-7526页

作者： Chuan Ning Chuanhui Wei Feifan Sheng Renwei Cheng Yingying Li Guoqiang Zheng Kai Dong Zhong Lin Wang CAS Center for Excellence in Nanoscience Beijing Key Laboratory of Micro-Nano Energy and SensorBeijing Institute of Nanoenergy and NanosystemsChinese Academy of SciencesBeijing 101400China College of Materials Science and Engineering Key Laboratory of Material Processing and Mold(Ministry of Education)Henan Key Laboratory of Advanced Nylon Materials and ApplicationZhengzhou UniversityZhengzhou 450001China School of Nanoscience and Technology University of Chinese Academy of SciencesBeijing 100049China School of Material Science and Engineering Georgia Institute of TechnologyAtlantaGeorgia 30332USA

Textile-based electronic devices have attracted increasing interest in recent years due to their wearability,breathability,*** them,textile-based triboelectric nanogenerators(T-TENGs)exhibit remarkable advantages in mechanical energy harvesting and self-powered ***,there are still some key challenges to the development and application of triboelectric fibers(the basic unit of T-TENG).Scalable production and large-scale integration are still significant factors hindering its *** the same time,there are some difficulties to overcome in the manufacturing process,such as achieving good stretchability and a quick production,overcoming incompatibility between conductive and triboelectric *** this study,triboelectric fibers are produced continuously by one-step coaxial wet *** are only 0.18 mm in diameter and consist of liquid metal(LM)core and polyurethane(PU)*** to the good mechanical properties between them,there is no interface incompatibility of the triboelectric *** addition,triboelectric fibers can be made into large areas of T-TENG by means of digital embroidery and plain *** T-TENGs can be used for energy harvesting and self-powered *** they are fixed on the forearm can monitor various strokes in *** work provides a promising strategy for the large-scale fabrication and large-area integration of triboelectric fibers,promotes the development of wearable T-TENGs.

关键词： triboelectric nanogenerators coaxial wet spinning scale production large-area integration self-powered sensing

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The first technology can compete with piezoelectricity to harvest ultrasound energy for powering medical implants

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Science Bulletin 2019年第21期64卷 1565-1566页

作者： Han Ouyang Zhou Li CAS Center for Excellence in Nanoscience Beijing Key Laboratory of Micro-Nano Energy and SensorBeijing Institute of Nanoenergy and NanosystemsChinese Academy of SciencesBeijing 100083China Beijing Advanced Innovation Centre for Biomedical Engineering Key Laboratory for Biomechanics and Mechanobiology of Ministry of EducationSchool of Biological Science and Medical EngineeringBeihang UniversityBeijing 100083China School of Nanoscience and Technology University of Chinese Academy of SciencesBeijing 100049China Center on Nanoenergy Research School of Physical Science and Technology Guangxi UniversityNanning 530004China

Sustainable operation of implanted medical devices is essential for clinic ***,limited battery capacity is a key challenge for most implantable medical electronics[1].Higher-capacity battery is not an ideal choice,because battery capacity is usually linearly dependent on battery volume[2].New energy harvesters have been developed as promising alternative solutions,which extracted energy from the ambient environment and biosystem for powering implantable devices[3],However,the energy reclaimed from body and ambient environment also have power lim让ation,such as thermal gradient and bioelectric *** ultrasound or RF energy into the body and generate electrical power by a converter is a reliable solution.

关键词： battery power ambient

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Micropatterned piezoelectric films induced by modulated corona field for weak signal detection

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Chemical Engineering Journal 2025年 517卷

作者： Fu Lv Chenghang Yu Bing Liu Jiamin Lin Zijian Hong Yongjun Wu Zhaohui Ren Qilong Zhang Shurong Dong Jikui Luo Juan Li Yuhui Huang School of Materials Science and Engineering Cyrus Tang Center for Sensor Materials and Applications Innovation Center of Yangtze Delta Institute of Fundamental and Transdisciplinary Research Zhejiang University Hangzhou Zhejiang 310058 China Nanhu Brain-computer Interface Institute Hangzhou Zhejiang 311100 China School of Engineering Hangzhou City University Hangzhou Zhejiang 310015 China College of Electronic Information and Engineering Hangzhou Dianzi University Hangzhou Zhejiang 310018 China Zhejiang Key Laboratory of Advanced Solid State Energy Storage Technology and Applications Taizhou Institute of Zhejiang University Taizhou Zhejiang 318000 China College of Information Science and Electronic Engineering Key Lab of Advanced Micro/Nano Electronic Devices & Smart Systems of Zhejiang Zhejiang University Hangzhou Zhejiang 310027 China College of Materials and Science Engineering Zhejiang University of Technology Hangzhou Zhejiang 310014 China

Enhancing the inherent piezoelectricity and introducing innovative structural designs are the two fundamental strategies for enhancing the pressure sensitivity of P(VDF-TrFE)-based sensors. In this study, we propose a scalable and cost-effective manufacturing approach that utilizes a modulated corona field to create micropatterns on the surface of P(VDF-TrFE) films, and enhance their piezoelectric properties during the annealing and recrystallization process. The micropatterned P(VDF-TrFE) films exhibit a distinctive “wavy” microstructure and possess ultrahigh piezoelectric properties (d 33 ∼ 35.6 pC/N), resulting in excellent sensitivity (∼477.94 mV/kPa). To unravel the underlying mechanism responsible for this superior performance, we employ finite element modeling and phase-field simulations. Our findings reveal that the modulated corona field generates an equipotential surface with a characteristic “wavy” distribution and promotes the creation of nucleation sites for the polar β phase in P(VDF-TrFE) films. A real-time monitoring system is further exploited with the obtained micropatterned P(VDF-TrFE) films for detecting radial artery pulse signals. The results obtained from this work hold great promise for the development of highly sensitive sensors, with wide-ranging applications in healthcare and environmental monitoring.

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Flexible and sensitive foot pad for sole distributed force detection

Flexible and sensitive foot pad for sole distributed force d...

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IEEE Conference on Nanotechnology

作者： Morteza Amjadi Min Seong Kim Inkyu Park Mobile Sensor and IT Convergence (MOSAIC) Center KAIST South Korea Korea Advanced Institute of Science and Technology Daejeon Daejeon KR

ISBN: (纸本)9781479956234

We develop highly flexible and compressible 3D interconnected porous PDMS structures by using sugar cubes as templates. The porous structures can be compressed to more than 80% without any side-wall buckling comparable with bulk polymers. Force sensitive resistors were fabricated by filtration of the CNT solution inside the porous structure of PDMS. We found that sufficient acid treatment can increase the adhesion and bonding between CNTs and PDMS. Force sensitive resistors respond the applied pressure and compressive strains by high linearity (R 2 >0.97) and sensitivity (GFs>2) with a reliable manner. Finally, as an application of our force sensitive resistors, a flexible foot pad containing force sensitive resistors arrays is developed for the foot sole distributed force detection.

关键词： Sugar Robot sensing systems Foot Strain Surface treatment Plastics Adhesives

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High resolution fluorescence-based temperature sensor for stand-off detection in physiological range

High resolution fluorescence-based temperature sensor for st...

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12th IEEE sensorS 2013 Conference

作者： Kuester, Timothy Robucci, Ryan Lam, Hung Rao, Govind Kostov, Yordan Dept. Computer Science and Electrical Engineering University of Maryland Baltimore County Baltimore MD United States Center for Advanced Sensor Technology Dept. of Chem. Biochem and Env. Engineering University of Maryland Baltimore County Baltimore MD United States

ISBN: (纸本)9781467346405

Fluorescence ratiometric temperature sensing system for stand-off temperature measurements in the physiological range is presented. It is based on the use of fluorescence dyes and an integrating photodetector system. The system is intended for use in neonatal intensive care units (NICU). It utilizes a measurement and a reference fluorescence dyes encapsulated in a film. Fluorescence is excited using LEDs and the emission is detected using photodiodes equipped with optical band pass filters. The current generated by the photodiodes is integrated and the charge is digitized. The fluorescence intensity is calculated as the difference in the measured intensities when the LED is on or off. The ratio of the two emission intensities depends linearly on the temperature. The system operates under room-light illumination with resolution

关键词： Fluorescence

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A noninvasive fluorescent biosensor for transdermal glucose 11

A noninvasive fluorescent biosensor for transdermal glucose

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11th Annual TechConnect World Innovation Conference and Expo, Held Jointly with the 20th Annual Nanotech Conference and Expo, and the 2017 National SBIR/STTR Conference

作者： Tolosa, L. Brown, S. Rao, G. Kostov, Y. Tiangco, C. Corson, E. University of Maryland Baltimore County Center for Advanced Sensor Technology 1000 Hilltop Circle BaltimoreMD21250 United States University of Santo Tomas Graduate School España Manila Philippines Johns Hopkins University Applied Physics Laboratory LaurelMD United States

ISBN: (纸本)9780998878201

Glucose determination in neonates require painful blood draws. Our group has been developing a painless, noninvasive method of collecting glucose passively diffusing through the skin. The transdermal glucose collected in this manner has a concentration in the uM range. Here we describe a fiber optic biosensor based on the glucose binding protein (GBP) labeled with either BAD AN or acrylodan and immobilized on Ni-NTA agarose beads. The portable, low-cost biosensor system consists of an optical fiber with the sensitized beads trapped on one end, and appropriate optics and electronics on the other end. The control software and the visual interface for the optical sensor is designed and implemented in Lab VIEW and runs on a tablet computer. To collect the transdermal glucose, an automated system with a sampling head attaches to the skin surface and executes a wash, dry and sampling protocol. Data collected from several human subjects using our noninvasive glucose monitoring system are presented.

关键词： Glucose

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Electronically scanned arrays of dual-polarized, doubly-mirrored balanced antipodal Vivaldi antennas (DmBAVA) based on modular elements

Electronically scanned arrays of dual-polarized, doubly-mirr...

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Antennas and Propagation Society International Symposium

作者： M.W. Elsallal D.H. Schaubert Advanced Technology Center Rockwell Collins Inc. Cedar Rapids IA USA Center for Advanced Sensor and Communications Antennas Department of Electrical and Computer Engineering University of Massachusetts Amherst MA USA

ISBN: (纸本)1424401224

This work is a continuation to parameter studies of balanced antipodal Vivaldi antenna (BAVA) to achieve broadband, electronically scanned arrays (ESA). Numerical simulations to evaluate the transformation of single polarized (SP) doubly-mirrored balanced antipodal Vivaldi antenna (DmBAVA) into a dual-polarized (DP) array are presented. Scan performance shows the widest bandwidth known for DP-DmBAVA antennas while maintaining SP-DmBAVA's superior features; reduced-height (~lambda Highest-Frequency /2), more than octave bandwidth, wide scan-angle and modular elements

关键词： Antenna arrays Vivaldi antennas Bandwidth Dielectric substrates Frequency sensor arrays Apertures Dielectric losses Shape control Gratings

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A morphology-dependent study of V₂O₅@rGO nanocomposite-based chemiresistive room temperature gas sensor for detecting NO₂

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Synthetic Metals 2025年 313卷

作者： Takte, Mahesh A. Chavhan, Gopal M. Fulari, Akash V. Tsai, Meng-Lin Hianik, Tibor Shirsat, Mahendra D. RUSA Center for Advanced Sensor Technology Department of Physics Dr. Babasaheb Ambedkar Marathwada University MS Chhatrapati Sambhajinagar (Aurangabad) 431 004 India Department of Electronics Dr. Babasaheb Ambedkar Marathwada University MS Chhatrapati Sambhajinagar (Aurangabad) 431 004 India Symbiosis Centre for Nanoscience and Nanotechnology Symbiosis International (Deemed University) MS Pune 412115 India Department of Materials Science and Engineering National Taiwan University of Science and Technology Taipei 10607 Taiwan Department of Nuclear Physics and Biophysics Faculty of Mathematics Physics and Informatics Comenius University Bratislava 842 48 Slovakia

We performed the shape-selective analysis of two different morphologies of mesoporous vanadium pentoxide (V2O5) composite containing reduced graphene oxide (rGO), namely nanorods (V2O5NR@rGO) and nanoparticles (V2O5NP... 详细信息

We performed the shape-selective analysis of two different morphologies of mesoporous vanadium pentoxide (V₂O₅) composite containing reduced graphene oxide (rGO), namely nanorods (V₂O₅NR@rGO) and nanoparticles (V₂O₅NP@rGO), respectively, as an efficient nitrogen dioxide sensor (NO₂). We have shown that the sensor's response highly depends on the sample's morphology, which can be described by the combined effect of surface area, pore size/distribution, crystallinity, and surface defects. The V₂O₅NR@rGO composite showed higher sensitivity with faster response and recovery times than the V₂O₅NP@rGO composite. The response of the sensors at ambient conditions can be attributed to the fast charge carrier mobility of rGO at room temperature (RT). The proposed gas sensor exhibited excellent stability, higher sensitivity, high repeatability, and better selectivity towards different gases with an acceptable detection limit (LOD) of 1.33 ppm and 2.32 ppm for V₂O₅NR@rGO and V₂O₅NP@rGO, respectively. These properties reveal the sensor's wonderful potential for real-time detection of NO₂. © 2025 Elsevier B.V.

关键词： Gas sensor Metal Oxide Morphology RGO

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Impurity scattering and Friedel oscillations in altermagnets

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Physical Review B 2024年第16期110卷 165413页

作者： Wang Chen Xiaoying Zhou Dong Zhang Ying-Qiang Xu Wen-Kai Lou SKLSM College of Materials Science and Opto-electronic Technology Center of Materials Science and Optoelectronics Engineering Hunan Provincial Key Laboratory of Intelligent Sensors and Advanced Sensor Materials School of Physics and Electronics Science

Altermagnetism is a newly predicted type of magnetism with spin-polarized electron bands but zero net magnetization. Here, we investigate the impurity scattering effect in an altermagnetic metal by using the T−matrix approach. We first calculate the impurity-induced local density of states (LDOS) in momentum space for a single scalar/magnetic impurity. In the absence (presence) of spin-orbit coupling and Zeeman field, the LDOS exhibits (does not exhibit) C4 symmetry due to the d−wave nature of the Fermi surfaces. In real space, we obtain the analytical expressions for the Friedel oscillation of LDOS based on the k·p Hamiltonian. The behavior of LDOS oscillations without spin-orbit coupling and Zeeman field also shows C4 symmetry. The amplitude of the LDOS decreases with r−1 in all directions at long distances, which is the same as that in conventional metals since they both have parabolic dispersion. However, the period of Friedel oscillations in an altermagnet is strongly anisotropic and depends on the direction of observation. Specifically, along the direction with (without) the spin splitting of the Fermi surface, the oscillation periods of the spin-up and spin-down LDOS are different (identical), resulting in an unfixed (a fixed) period at a given energy for the total LDOS. The difference between the two periods is proportional to the magnitude of the spin splitting of the Fermi surface. Our results reveal unique and universal features of the Fermi surfaces of an altermagnet that can be tested by spin-polarized scanning tunneling microscopy.

关键词： Altermagnetism Fermi surface Local density of states Quantum interference effects Green's function methods Surface scattering k dot p method

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