A5074416469- Acoustic Wave Resonator Technologies
- Advanced MEMS and NEMS Technologies
- Ferroelectric and Piezoelectric Materials
- Adsorption and Cooling Systems
- Advanced Memory and Neural Computing
- Advanced Sensor and Energy Harvesting Materials
- Piezoelectric Actuators and Control
- Heat Transfer and Optimization
- Refrigeration and Air Conditioning Technologies
- Wind Energy Research and Development
- Ferroelectric and Negative Capacitance Devices
- Transition Metal Oxide Nanomaterials
- Gas Sensing Nanomaterials and Sensors
- Thermodynamic and Exergetic Analyses of Power and Cooling Systems
- Surface Modification and Superhydrophobicity
- Advanced Measurement and Metrology Techniques
- Ultrasonics and Acoustic Wave Propagation
- Ultrasound Imaging and Elastography
- Nanomaterials and Printing Technologies
- Multiferroics and related materials
- Organic Light-Emitting Diodes Research
- Aerogels and thermal insulation
- Mechanical and Optical Resonators
- Dielectric materials and actuators
- Fluid Dynamics and Vibration Analysis
Institute of Engineering Thermophysics
2021-2024
Chinese Academy of Sciences
2007-2024
China Academy of Engineering Physics
2018-2024
University of Electronic Science and Technology of China
2013-2023
University of Shanghai for Science and Technology
2022
National Tsing Hua University
2021
Shanghai Jiao Tong University
2015-2019
Beijing Solar Energy Research Institute
2017-2019
National Engineering Research Center of Electromagnetic Radiation Control Materials
2013-2019
Shihezi University
2019
This work demonstrates the ultrasonic imaging ability of piezoelectric micromachined transducer (PMUT) for detection defects deep in solids by total-focus algorithm. The 3-MHz PMUT array uses thin-film PZT as material energy transformation because its high coefficient. Six columns with 12 units each exhibit an acoustic pressure 137 kPa measured water at 1 cm away when driven a 27-Vpp input. Butter is chosen experimentally coupling agent to low noise level and short cycling down. Through...
Condensed drops usually display a Wenzel state on superhydrophobic surface (SHS) only with microrough architecture, while Cassie easily appear micro−nano hierarchical roughness. The mechanism of this is not very clear. It important to understand how the structure affects states condensation so that good SHS can be designed achieve highly efficient dropwise condensation. In study, interface free energy (IFE) local condensate, which comes from growth and combination numerous initial nuclei,...
In this letter, we report the resistive switching properties of ion-exfoliated LiNbO3 thin films. After annealing in Ar or vacuum, electro-forming has been observed on films, and oxygen gas bubbles can be eliminated by tuning conditions order to prevent destruction top electrodes. The films show rectifying filamentary after forming, which is interpreted a simplified model that local filament does not penetrate throughout film, resulting asymmetric contact barriers at two interfaces. well...
Traveling-wave ultrasonic micromotor is a promising technology for microactuation and nanopositioning. A special designed annular stator was proposed with the combination of two separate buffer structures to achieve high performance. propagation moving antinodes observed analyzed. The fabricated exhibits large displacement $4.71 μm at 1 V quality factor 220 central frequency 101.6 kHz. assembled rotor actuated, controllable rotate speed achieved. measured maximum torque reached $2.63 μNm 1.3...
This article presents the piezoelectric micromachined ultrasonic transducer (PMUT) and its arrays that were based on a sputtered PZT/Si diaphragm structure prototyped from an SOI substrate. Due to high coefficient of PZT, polarization tuning pretreatment, membrane thickness optimization, PMUT shows transmitting sensitivity in air good coupling capability liquid solid. The transmitter exhibited 809, 190, 135 nm/V at resonant frequency 0.450, 0.887, 1.689 MHz, respectively, air. 5 ×5 array...
Abstract This paper presents a dual-frequency piezoelectric micromachined ultrasonic transducer (PMUT) line array with low crosstalk level, which was fabricated on silicon-on-insulator (SOI) wafers sputtered thin film (PZT) and Si diaphragm structure. The obtained consists of 120 0.77 MHz 192 2.30 PMUT units in total minimum interspace 50 μ m. Due to the high coefficient PZT, shows transmitting sensitivity air good effective electromechanical coupling factor. displacement sensitivities are...