A5011625963- Acoustic Wave Resonator Technologies
- Advanced Sensor and Energy Harvesting Materials
- Gas Sensing Nanomaterials and Sensors
- Conducting polymers and applications
- Innovative Energy Harvesting Technologies
- Advanced MEMS and NEMS Technologies
- Analytical Chemistry and Sensors
- Ferroelectric and Piezoelectric Materials
- Mechanical and Optical Resonators
- Microfluidic and Capillary Electrophoresis Applications
- Advanced Fiber Optic Sensors
- Microfluidic and Bio-sensing Technologies
- Metal and Thin Film Mechanics
- Energy Harvesting in Wireless Networks
- Ultrasonics and Acoustic Wave Propagation
- Tactile and Sensory Interactions
- GaN-based semiconductor devices and materials
- Adhesion, Friction, and Surface Interactions
- Non-Invasive Vital Sign Monitoring
- Advanced Chemical Sensor Technologies
- Supercapacitor Materials and Fabrication
- Obstructive Sleep Apnea Research
- Advanced Memory and Neural Computing
- Perovskite Materials and Applications
- Orbital Angular Momentum in Optics
Hangzhou Dianzi University
2017-2025
Zhejiang University
2013-2024
Zhejiang University of Science and Technology
2021
Hangzhou Xixi hospital
2014-2019
State Key Laboratory of Silicon Materials
2017
Here we demonstrate a magnetic resonance coupling based wireless triboelectric nanogenerator (TENG) and fully self-powered sensors. By integrating microswitch an inductor with the TENG, pulsed voltage output is converted into sinusoidal signal fixed frequency. This can be transmitted wirelessly from transmit coil to resonant-coupled receiver efficiency of 73% for 5 cm distance between two coils (10 diameter). Analytic models oscillating coupled signals energy transfer are developed, showing...
Abstract We report ZnO/glass surface acoustic wave (SAW) humidity sensors with high sensitivity and fast response using graphene oxide sensing layer. The frequency shift of the is exponentially correlated to change, induced mainly by mass loading effect rather than complex impedance change SAW show at a broad range from 0.5%RH 85%RH < 1 sec rise time. simple design excellent stability our GO-based sensors, complemented full measurement, highlights their potential in wide applications.
Egg albumen as the dielectric, and dissolvable Mg W top bottom electrodes are used to fabricate water-soluble memristors. 4 × cross-bar configuration memristor devices show a bipolar resistive switching behavior with high low resistance ratio in range of 1 10(2) 10(4), higher than most other biomaterial-based memristors, retention time over 10(4) s without any sign deterioration, demonstrating its stability reliability. Metal filaments accompanied by hopping conduction believed be...
This paper reports high performance flexible Lamb wave sensors with a graphene oxide sensing layer.
As a reliable indicator of human physiological health, respiratory rate has been utilized in more and cases for prediction diagnosis potential diseases the dysfunction caused by cystic fibrosis. However, compared with smart mobile electronics, traditional clinical respiration monitoring systems is not convenient to work as household wearable device real-time daily life due its cumbersome structure, complex operability, reliance on external power sources. Thus, we propose wireless sensor...
Abstract Triboelectric nanogenerator (TENG) is a promising technology, which can convert biokinetic energy into electricity and be utilized as self‐powered sensors power sources for wearable electronics. The existing designs of conventional TENGs require complex fabrication processes device structures, they need to attached on human body application, uncomfortable may lead malfunction under intense moment. Here, direct current TENG proposed by utilizing natural body, basketball, shoes,...
Flexible ZnO/polyimide surface acoustic wave (SAW) based humidity sensors were fabricated and their performances investigated. ZnO films deposited on polyimide substrates are (0002) oriented columnar nanocrystals with grain sizes of 50–60 nm. SAW devices different wavelengths showed high transmission performance, the exhibited a good repeatability in response to cyclic change from ∼5% relative (RH) ∼87% RH. The responses RH increase humidity. sensitivity increases decrease wavelength owing...
Sleep apnea syndrome (SAS) is a common but underdiagnosed health problem related to impaired quality of life and increased cardiovascular risk. In order solve the complicated expensive operation procedures for clinical diagnosis sleep apnea, here we propose small low-cost wearable diagnostic system. The system uses photoplethysmography (PPG) optical sensor collect human pulse wave signals blood oxygen saturation synchronously. Then multiscale entropy random forest algorithms are used process...
By exploiting the adsorbent gaseous molecules induced changes in intrinsic properties of graphene/silicon (Gr/Si) Schottky junction, authors report a sensitive, low‐power consuming, multimode environmental sensor. combining an array Gr/Si diodes with differential amplifier circuit, are able to not only differentiate temperature coefficient and humidity sensing, but also monitor sun‐light exposure time. Our device is particularly sensitive toward both forward reverse biased, works resistive...
A flexible surface acoustic wave (SAW) strain sensor in the frequency range of 162–325 MHz was developed based on a single crystalline LiNbO3 thin film with dual resonance modes, namely, Rayleigh mode and thickness shear (TSM). This SAW could handle wide up to ±3500 με owing its excellent flexibility, which is nearly six times detecting bulk piezoelectric substrate sensors. The exhibited high sensitivity 193 Hz/με maximum hysteresis less than 1.5%. temperature coefficients frequency, for TSM...
The phonocardiogram (PCG) is an important analysis method for the diagnosis of cardiovascular disease, which usually performed by experienced medical experts. Due to high ratio patients doctors, there a pressing need real-time automated classification system disease. This paper proposes deep neural-network structure based on one-dimensional convolutional neural network (1D-CNN) and long short-term memory (LSTM), can directly classify unsegmented PCG identify abnormal signal. data were...
A stacked piezoelectric micropump based on the synthetic jet principle with a size of 22 × 5 mm3 is designed and fabricated. Through theoretical finite element method (FEM) analysis, conditions for achieving structure are obtained, gas flow properties inside chamber analyzed. The first-order mode resonant frequency actuator simulated. At 22.5 kHz, maximum central displacement can reach 12.3 μm. In addition, key dimensions optimized to improve output rate. Experiments prototype show that it...
La3Ga5SiO14 (langasite, LGS)-based surface acoustic wave (SAW) devices are widely used for industrial health monitoring in harsh high-temperature environments. However, a conventional LGS-based SAW structure has low quality factor (Q) due to its spurious resonant peaks. A hetero-acoustic layer (HAL)-based can effectively enhance the Q and figure of merit (FOM) SAWs better energy confinement SAWs. In this work, HAL-based is proposed achieve high FOM resistance at same time. Based on finite...
Metamaterial-based wireless power transfer (MM-WPT) analysis has attracted substantial attention due to its great application potential. However, traditional MM-WPT is constrained by frequency domain approaches which are suitable only for infinitely extended periodic signals or fixed-frequency sine waves but not complex waveforms of various energy sources. This paper presents an innovative time-domain system method systems tailored evaluate sources with arbitrary waveforms. The foundation...