Article
Engineering, Electrical & Electronic
Fei Huang, Wenxu Zhang, Ling Li, Zhaofeng Sun, Yuntao Yang, Ruichao Chen, Bin Peng, Wanli Zhang
Summary: This study proposes a novel MEMS MSAW resonator based on the AlN/Si/(Fe90Co10)(78)Si12B10 structure, which has high magnetic sensitivity and quality factor, and can meet the requirements of wireless interrogation and high sensitivity. It has clear potential in the future development of the Internet of Things.
IEEE SENSORS JOURNAL
(2022)
Article
Chemistry, Analytical
Ming-Jer Jeng, Ying-Chang Li, Mukta Sharma, Chia-Wei Chen, Chia-Lung Tsai, Yen-Heng Lin, Shiang-Fu Huang, Liann-Be Chang, Chao-Sung Lai
Summary: The study successfully combined a surface acoustic wave sensor with a microfluidic channel to detect C-reactive protein, showing a high detection limit and a wide concentration range, making it a potential biosensor for diagnosing the risk of cardiovascular disease.
Article
Engineering, Electrical & Electronic
Yujie Ai, Hongrui Lv, Yinglong Huang, Jiaheng He, Ye Wang, Jiwen Wu, Yun Zhang
Summary: In this study, a surface acoustic wave (SAW) resonator with high quality factors (Q) of 3526/10 205 at the resonant/antiresonant frequencies (f(r)/f(a)) was successfully fabricated on thick metal-organic chemical vapor deposition (MOCVD)-grown (0002) aluminum nitride (AlN) films (4 μm) on sapphire. The investigation on device parameters, including aspect ratio of length to width (L/W), number of interdigital transducers (IDTs), and IDT metal thickness, revealed that the high Q was achieved due to the large L/W value of 12 and the thick AlN film (4 μm). Furthermore, the resonator exhibited a high Q of 4027 at 250 °C and temperature coefficient of frequency (TCF) values of -46.52/-46.09 ppm/°C for f(r)/f(a) in the temperature range from -50 °C to 250 °C, showing promising potential for temperature sensor application.
IEEE SENSORS JOURNAL
(2023)
Article
Acoustics
Christopher Hakoda, Cristian Pantea, Vamshi Krishna Chillara
Summary: The paper presents a simple method for designing localized regions with minimal SAW amplitude, achieved by controlling the beat phenomenon. These regions can have variable widths and be positioned consecutively. The efficacy of the proposed method for SAW wave propagation is demonstrated through supplementary simulations.
JOURNAL OF SOUND AND VIBRATION
(2021)
Review
Engineering, Multidisciplinary
M. Z. Aslam, H. Zhang, V. S. Sreejith, M. Naghdi, S. Ju
Summary: This paper provides a comprehensive review of the recent advances in the development of surface acoustic wave (SAW) sensors for industrial applications, and discusses the potentials, challenges, and future research directions in this field.
Article
Engineering, Electrical & Electronic
Fanbing Hu, Lina Cheng, Shuyao Fan, Xufeng Xue, Yong Liang, Minghui Lu, Wen Wang
Summary: A new AlN film-based surface acoustic wave (SAW) sensor was developed for high-temperature strain detection, with improved strain sensitivity achieved through differential frequency signal extraction. The sensor demonstrated a maximum sensitivity of 0.84 ppm/mu epsilon at 550 degrees C and excellent temperature stability in the range of 20-600 degrees C.
SENSORS AND ACTUATORS A-PHYSICAL
(2022)
Article
Acoustics
Chen Fu, Qutong Yang, Yabing Ke, Ran Tao, Jingting Luo, Xiaoming Fan, Bing Zhang, Honglang Li
Summary: This article investigates the application of Lamb wave-based unidirectional transducers in acoustic wave-driven microfluidic devices, and verifies its efficiency through simulation and experiments.
IEEE TRANSACTIONS ON ULTRASONICS FERROELECTRICS AND FREQUENCY CONTROL
(2022)
Article
Engineering, Electrical & Electronic
Shuliang Pan, Maria Muzamil Memon, Jiang Wan, Tao Wang, Wanli Zhang
Summary: This work presents the temperature stability of an AlN-based surface acoustic wave pressure sensor under different pressures. The study reveals that both elastic modulus and thermal mismatch contribute to the decrease in temperature coefficient of frequency (TCF) with increasing pressure. Furthermore, the pressure can cancel part of the frequency drop caused by temperature, resulting in a smaller TCF at high pressure.
IEEE SENSORS JOURNAL
(2022)
Review
Chemistry, Analytical
Jia Ning, Yulin Lei, Hong Hu, Chenhui Gai
Summary: This review focuses on the development of surface acoustic wave-enabled acoustic drop ejection (SAW-ADE) technology, which can eject droplets from liquids without touching the sample. The article provides an overview of the technology, discusses influencing factors, and introduces its application scenarios. The optimization of SAW-ADE systems for specific applications is crucial.
Article
Engineering, Electrical & Electronic
Xiangrong Li, Li Qin, Lifeng Guo, Qiulin Tan
Summary: A flexible surface acoustic wave (SAW) strain sensor based on a 100 μm thin langasite substrate is proposed, with a linear strain range of 1-1800 με and strain sensitivity of 44.68 Hz/με at room temperature. The sensor is affected by temperature at a fixed strain, and changes in temperature or strain cause variations in the measured frequency. To accurately measure strain in complex environments, the interference of temperature needs to be eliminated, and the intercept and slope are extracted from the strain-frequency curves at different temperatures for accurate estimation.
IEEE SENSORS JOURNAL
(2023)
Article
Chemistry, Analytical
Hui Wang, Linwei Zhang, Zhixin Zhou, Liang Lou
Summary: The temperature performance of AlN-SAW resonators and AlScN-SAW resonators was studied in this paper. They were simulated using COMSOL Multiphysics, and their modes and S11 curve were analyzed. The two devices were fabricated using MEMS technology and tested using VNA, and the test results were consistent with the simulation results. Temperature experiments were conducted with temperature control equipment, and the changes in S11 parameters, TCF coefficient, phase velocity, and quality factor Q with temperature were analyzed. The results showed that both the AlN-SAW resonator and the AlScN-SAW resonator exhibited excellent temperature performance, with good linearity. Additionally, the AlScN-SAW resonator had a 9.5% higher sensitivity, 15% higher linearity, and 11.1% higher TCF coefficient. It is therefore more suitable as a temperature sensor.
Review
Chemistry, Analytical
Debdyuti Mandal, Sourav Banerjee
Summary: This article introduces surface acoustic waves (SAWs) and their applications in sensors. By explaining the physics of guided SAWs and the piezoelectric materials used, it discusses how the materials and cuts can alter sensor functionality. It summarizes key electrode configurations and guidelines for generating different guided wave patterns, and explores the applications of SAW sensors in various fields and potential improvement plans in science and technology.
Article
Thermodynamics
Dong-Sheng Guo, Xiao-Bin Li, Si-Ning Li, Hong-Na Zhang, Feng-Chen Li, Ping-Jian Ming
Summary: In this study, the dynamic mechanism of vapor bubble during boiling process under the effect of acoustic field was numerically investigated. It was found that the acoustic field has an influence on bubble behaviors, creating tiny vortices at the root of the bubble and causing one bubble to collapse into two separate bubbles. Furthermore, the acoustic field can break the growing bubbles and promote flow boiling heat transfer.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Engineering, Electrical & Electronic
Leonardo Lamanna, Francesco Rizzi, Marco Bianco, Matteo Agostini, Marco Cecchini, Massimo De Vittorio, Venkat R. Bhethanabotla
Summary: This study demonstrates the optical photoresponse of AlN-based SAW devices in the IR-Vis-UV range, with a focus on different substrate materials. Variations in out-of-band insertion loss due to the photovoltaic effect were observed, with a mathematical model implemented to explain the electrical admittance change. The study also reveals a frequency downshift in resonances modes under UV light, indicating a potential new UV light detection mode using flexible AlN-based SAW devices.
IEEE SENSORS JOURNAL
(2021)
Article
Chemistry, Analytical
Woohyuk Kim, Beomseok Cha, Jessie S. Jeon, Jinsoo Park
Summary: We have developed an acoustofluidic method for dynamically controlling the chemical concentration (CC) within picoliterscale droplets at high-throughput production. The method involves rapidly mixing two fluids using acoustic streaming flow-induced micro-vortices, and precisely controlling the mixing index through modulation of the wave amplitude. We have demonstrated the applicability of this method for producing droplet libraries with tunable CCs, which is promising for various droplet microfluidic applications.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Chemistry, Analytical
Hanlin Wang, Joe Boardman, Xiaoyan Zhang, Chao Sun, Meng Cai, Jun Wei, Zhiqiang Dong, Mingqian Feng, Dongfang Liang, Sheng Hu, Yu Qian, Shuang Dong, Yongqing Fu, Hamdi Torun, Aled Clayton, Zhenlin Wu, Zhihua Xie, Xin Yang
Summary: An enhanced tilted-angle (ETA) acoustofluidic device is developed for cell mechanophenotyping, which can distinguish and identify different cell types based on their acoustic contrast factors. The device uses an interdigital transducer and introduces a 5-degree inclination angle to manipulate cells according to their mechanical properties. The methodology is demonstrated by distinguishing lung and breast cancer cells from leukocytes.
ANALYTICA CHIMICA ACTA
(2023)
Article
Physics, Applied
Tengfei Zheng, Yue Liu, Yongqing Fu, Chaohui Wang
Summary: In this paper, a technique using asymmetrically aligned focused surface acoustic waves (FSAWs) was developed to enhance the sensitivity of microarray electrode detection. The effects of various focusing angles of the FSAW devices on acoustic wave amplitudes were analyzed, and the sensitivity of microarray electrochemical sensors was investigated using the FSAW device with a focusing angle of 30 degrees.
APPLIED PHYSICS LETTERS
(2023)
Review
Engineering, Environmental
Hui Chen, Fengling Zhuo, Jian Zhou, Ying Liu, Jinbo Zhang, Shurong Dong, Xuqing Liu, Ahmed Elmarakbi, Huigao Duan, Yongqing Fu
Summary: Flexible and wearable electronics have attracted significant attention in research due to their potential applications in personal healthcare, electronic skins, and human-machine interfaces. Strain sensors, especially those based on two-dimensional carbon-based materials such as graphene, play a crucial role in wearable electronics by efficiently converting external stimuli into electrical signals. This review highlights the need for a comprehensive overview of graphene-based strain sensors that focuses on their attributes, mechanisms, fabrication strategies, and applications in various fields.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Electrical & Electronic
Yihao Guo, Changshuai Yin, Jian Zhou, Zhangbin Ji, Fengling Zhuo, Hui Ling Ong, Jikai Zhang, Huigao Duan, Richard Fu
Summary: UV detectors based on SAW technology have the advantage of remote operation and zero power consumption. The frequency shift in SAW devices induced by UV irradiation is mainly caused by acoustoelectric and thermal effects, with minor influences from mass-loading and photo-capacitive effects. This study systematically investigates the contributions of acoustoelectric and thermal effects at different UV light intensities and clarifies their individual influences on SAW-based UV sensing under different conditions.
IEEE SENSORS JOURNAL
(2023)
Review
Engineering, Electrical & Electronic
Pingsheng Xue, Qiang Liu, Shuncheng Lu, Yongwei Xia, Qiang Wu, Yongqing Fu
Summary: This review introduces the fabrication methods, transmission mechanisms, and application examples of microstructured optical fibers. Sensing is highlighted as one of the common applications, and the examples of strain/pressure/bending/twist, temperature, flow rate, electric/magnetic field, humidity, gas, refractive index, and chemical/biochemical analyte sensing are discussed based on various principles. The state of the art, developing trends, and challenges faced by sensing technology based on microstructured optical fibers are also discussed.
OPTICAL FIBER TECHNOLOGY
(2023)
Article
Chemistry, Analytical
Jiandong Liu, Bin Liu, Juan Liu, Xing-Dao He, Jinhui Yuan, Zabih Ghassemlooy, Hamdi Torun, Yong-Qing Fu, Xuewu Dai, Wai Pang Ng, Richard Binns, Qiang Wu
Summary: A high quality factor (Q-factor) optical fiber interferometer based biosensing platform, combining single mode-core-only-single mode fiber (SCS) and multimode interference effect, is developed for ultra-high sensitivity biosensing. This biosensor is capable of effectively detecting concentrations of Staphylococcus aureus from 10 to 105 CFU/mL, with good sensitivity, stability, reproducibility and specificity, showing great potentials in diagnostics.
Article
Acoustics
Fangda Wu, Hanlin Wang, Chao Sun, Fan Yuan, Zhihua Xie, Roman Mikhaylov, Zhenlin Wu, Minghong Shen, Jian Yang, Will Evans, YongQing Fu, Liangfei Tian, Xin Yang
Summary: Recently, there has been increasing interest in the use of surface acoustic wave (SAW) based acoustofluidic separation for microparticles and cells due to their accuracy and biocompatibility. This study develops an acoustophoretic system using SAW based interdigital electrode devices, with power meters employed to monitor the incident and reflected powers. The study provides theoretical analysis and experimental results to determine the proper input power for separating mixtures of different-sized microspheres, offering practical guidance for bioparticle separation using SAW devices.
Article
Acoustics
E. Lugo-Hernandez, T. Mirea, J. M. Carmona, M. Clement, J. Olivares, J. Carlos Collado, J. Mateu
Summary: By manufacturing SMRs of different sizes and shapes and studying the influence of the position of the electrical probing spot, we have demonstrated both theoretically and experimentally that devices with larger areas are more likely to display these additional peaks. Our updated models accurately simulate the frequency response of the SMRs, revealing that spurious peaks are mostly related to the resistance of the electrodes. Our study clarifies the origin of the spurious resonances and offers solutions for both, the optimal design and measurement method of SMRs.
Article
Materials Science, Multidisciplinary
Bo Sun, Wenge Chen, Hui Zhang, Tao Feng, Wanqing Xing, Ahmed Elmarakbi, Yong-Qing Fu
Summary: CeO2 decorated reduced graphene oxide (CeO2@rGO) nanocomposites were synthesized and studied for their tribological, anti-corrosive, and photocatalytic applications. The nanocomposites exhibited reduced friction coefficient in the presence of lubricating oil, improved corrosion resistance in the coating, and enhanced efficiency in RhB dye removal. These effects are attributed to the unique properties and synergistic effects of the CeO2 nanoparticles and rGO in the nanocomposites.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Engineering, Electrical & Electronic
Wenyi Sun, Shuai Song, Bairen Qian, Da Wen, Daying Jiang, Yongqing Fu, Qiaoyun Wang
Summary: Diabetes is a common chronic disease worldwide, with increasing prevalence among young children. This article explores the use of multivariate statistical analysis and Fourier Transform Raman spectroscopy to monitor blood glucose levels. The results show that the developed method, using principal component regression with direct orthogonal signal correction, has a low calibration error, high prediction accuracy, and strong potential as a diagnostic tool for diabetes mellitus.
MICROWAVE AND OPTICAL TECHNOLOGY LETTERS
(2023)
Article
Physics, Multidisciplinary
Linjuan Kuang, Jian Zhou, Yihao Guo, Huigao Duan, Yong Qing (Richard) Fu
Summary: MEMS accelerometers have great potentials for applications in aerospace, autonomous driving, and consumer electronics. However, their working principles based on capacitive and resistance types are not suitable for wireless and passive sensing. The proposed modeling platform effectively integrates the elastic acoustic effect and wave equations to optimize designs of SAW accelerometers, producing accurate simulation results. The designed SAW accelerometers exhibit high sensitivity, linearity, and wide acceleration range.
Article
Chemistry, Analytical
Chong Li, Ran Tao, Zhiqiong Li, Jiahui Liao, Chen Fu, Jikai Zhang, Huiling Ong, Chenze Lu, Jingting Luo, Yongqing Fu
Summary: High-performance humidity sensors with good stability, high precision, and fast responses are in high demand for various applications. In this study, Love wave mode humidity sensors were developed using quartz-based SAW devices and composite sensing layers of Ti3C2Tx, MoS2 nanoflowers, and MoS2 @Ti3C2Tx. The MoS2 @Ti3C2Tx coated humidity sensor exhibited an ultra-high sensitivity of 0.67 kHz/% RH in a wide humidity range, along with fast response/recovery rates, great repeatability, and long-term stability.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Chemistry, Multidisciplinary
Yixing Luo, Ming Wen, Jian Zhou, Qingsheng Wu, Guangfeng Wei, Yongqing Fu
Summary: In this study, non-precious-metal based electrocatalysts with highly-exposed and well-dispersed active sites were successfully synthesized. The Co-CoO/NPCF electrocatalyst exhibited remarkable performance for both ORR and OER due to the high exposure of Co-CoO heterostructures and the favorable mass and electron transfer ability of NPCF. Further application of Co-CoO/NPCF in rechargeable ZAB achieved superior performance for liquid-state ZAB and flexible all-solid-state ZAB.
Article
Engineering, Electrical & Electronic
Qiang Liu, Yongwei Xia, Pingsheng Xue, Lu Cai, Qiang Wu, Yongqing Fu
Summary: In this article, we have successfully solved the demodulation difficulty of cascaded photonic crystal fiber interferometers (PCFIs) built by fusion splicing. By controlling the lengths of the collapsed regions, we have achieved more sinusoidal output spectra of partial interferometers, reducing the demodulation difficulty of the sensor network. By using fast Fourier transform (FFT) processing and frequency division multiplexing (FDM), we have achieved separate demodulation of strain for five cascaded interferometers, simplifying and increasing the accuracy of demodulation. Experimental verification shows that the interferometer is not subject to temperature crosstalk.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2023)
Proceedings Paper
Engineering, Electrical & Electronic
Boming Lyu, Jian Zhang, Yunjia Li, Yongqing Fu, Honglong Chang, Weizheng Yuan, Kai Tao
Summary: This paper proposes an innovative water charging method for the first time, where the charge-transfer mechanism is suppressed by steering oxygen plasma treatment. The 3D charge distribution map of NPU shape is obtained through the surface potential scanner. The method is applied to DEG and a self-powered thin-film sensor with droplet position monitoring function is prepared. This study demonstrates the feasibility of the proposed water charging method and proposes a new application in the field of water energy harvesting.
2023 IEEE 36TH INTERNATIONAL CONFERENCE ON MICRO ELECTRO MECHANICAL SYSTEMS, MEMS
(2023)