Article
Engineering, Electrical & Electronic
Shuzhen Tian, Fujun Wen, Lirong Qian, Cuiping Li, Litian Wang, Dan Li, Sheng Xu, Hongji Li, Mingji Li
Summary: This study successfully prepared a surface acoustic wave (SAW) relative humidity (RH) sensor based on a nanodiamond-chitosan (ND-CS) composite film. The sensor exhibits good linear response, low humidity hysteresis, short response and recovery time. It also shows excellent repeatability, long-term stability, temperature stability, and selectivity.
IEEE SENSORS JOURNAL
(2023)
Article
Chemistry, Analytical
Yufen Wu, Yanling Li, Xue Wang, Jianchao Zhang, Jin Yang
Summary: This article proposes a method that combines genetic algorithm with signal time-domain fitting to estimate the frequency of passive wireless surface acoustic wave (SAW) resonant sensor echo signals. By optimizing the genetic algorithm and introducing the Hilbert transform and fast Fourier transform subsection method, frequency estimation under a single parameter is achieved. The experimental results show that the method has a frequency estimation error within 3 kHz and estimation time eight times faster than the conventional genetic algorithm.
Article
Engineering, Electrical & Electronic
Wei Wu, Xia Xiang, Xiaotao Zu
Summary: The study investigates the humidity sensing performance and mechanism of SAW sensors with CA films, showing that the porous microstructure and strong interaction with water molecules of the CA films greatly improve the sensor's humidity sensing performance. The sensors exhibit fast and linear response to humidity, with extremely low responses to other gases.
IEEE SENSORS JOURNAL
(2022)
Article
Materials Science, Multidisciplinary
Sheng Zhang, Yang Wang, Manzhu Ke, Fengming Liu, Hailong He, Liping Ye, Zhengyou Liu
Summary: Metafluids, a version of metamaterials with fluid background, have been found to accommodate a third parameter, the effective shearlike modulus. The experimental implementation of this novel metafluid, capable of supporting surface waves, updates the existing knowledge of surface waves.
Article
Chemistry, Analytical
Benedict Scheiner, Florian Probst, Fabian Michler, Robert Weigel, Alexander Koelpin, Fabian Lurz
Summary: As automation and predictive maintenance become increasingly important in industrial processes, acquiring as much data as possible is essential. However, the need for remote sensing in scenarios where moving parts may cause cable wear or harsh environments prevent wired connections poses challenges. Resonant surface acoustic wave (SAW) sensors offer the possibility of wireless interrogation, but current frequency reader systems have drawbacks that hinder widespread usage.
Article
Engineering, Electrical & Electronic
Xiangrong Li, Qiulin Tan, Li Qin, Lei Zhang, Xiaorui Liang, Xiawen Yan
Summary: The study introduced a surface acoustic wave sensor coating with MoS2/GO nano composite, which exhibited high humidity sensitivity and thermal stability. The sensor showed excellent performance at different humidity levels, making it suitable for applications in medical care, environmental monitoring, and cultural relic preservation.
SENSORS AND ACTUATORS A-PHYSICAL
(2022)
Article
Engineering, Electrical & Electronic
Jian Zhou, Yanghui Liu, Zhengjia Zhan, Fengling Zhuo, Zhangbin Ji, Yuanjin Zheng, Yongqing Fu, Huigao Duan
Summary: Surface acoustic wave (SAW) devices are powerful platforms for mass sensing, chemical vapor or gas detection, and biomolecular identification. A novel strategy based on giant mass-sensitivity effects on the global area of the SAW device is proposed to enhance sensitivity and reduce detection limit. The achieved mass sensitivity using this strategy is significantly higher than traditional methods.
IEEE SENSORS JOURNAL
(2022)
Article
Radiology, Nuclear Medicine & Medical Imaging
Jingfei Liu, Jurjen Leer, Salavat R. Aglayomov, Stanislav Y. Emelianov
Summary: This study proposes an ultrasonic Scholte-wave-based approach for imaging the elasticity of superficial tissue. By introducing a liquid layer between the ultrasound imaging transducer and the tissue-mimicking phantom, Scholte waves can be generated to image the elasticity of superficial tissue. Furthermore, by combining the proposed Scholte wave technique and the conventional shear wave technique, a comprehensive elasticity imaging of tissue from superficial to deep regions can be achieved.
Article
Nanoscience & Nanotechnology
Yanghui Liu, Jian Zhou, Zhangbin Ji, Fengling Zhuo, Shengyu Wen, Yiqin Chen, YongQing Fu, Huigao Duan
Summary: This work proposed a hybrid/synergistic strategy using a LiNbO3/SiO2/SiC heterostructure to generate shear-horizontal (SH) surface acoustic waves (SAWs), and a nanocomposite of polyethylenimine-silicon dioxide nanoparticles (PEI-SiO2 NPs) to form a sensitive layer, achieving an ultrahigh sensitivity for SAW humidity sensors.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Engineering, Electrical & Electronic
Shudong Wang, Xiao Xie, Bingjian Lu, Jizhen Jin, Xiaoming Chen, Yunjia Li
Summary: This study presents an acoustic detection system based on resonant-enhanced acquisition, which utilizes a horn-shaped acoustic resonator with multiple resonant frequencies to achieve long-distance acoustic sensing with high sensitivity in both the audible and ultrasonic ranges. The system enhances the sensitivity in designated frequencies by 28 dB and increases the SNR by 14.1 dB. Integrated with a control terminal, it can perform complex functionality like recording, analyzing, and providing visual/audible feedback of acoustic information for human operators.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2023)
Article
Engineering, Biomedical
Eric C. Hobson, Weiping Li, Benjamin A. Juliar, Andrew J. Putnam, Jan P. Stegemann, Cheri X. Deng
Summary: Resonant Acoustic Rheometry (RAR) is a new, non-contact technique for characterizing mechanical properties of soft and viscoelastic biomaterials. RAR uses surface wave analysis to extract material properties, providing consistent quantitative data and dynamic performance tracking. It circumvents limitations of conventional rheology methods and is a valuable noninvasive tool for quantifying viscoelastic mechanical properties.
Article
Engineering, Electrical & Electronic
Jian Che, Junsen Wang, Changcang Qiao, Yudong Xia, Kai Ou, Jing Zhou, Yuxiang Ni, Wenting Zhang, Yuchen Han, Xiaotao Zu, Yongqing Fu, Yongliang Tang
Summary: Developing highly sensitive H2S gas sensors has been a critical challenge due to its wide-range application in industry and frequent leakage, which poses a threat to people's safety. In this study, a highly sensitive room-temperature SAW H2S gas sensor based on Si-Cu nanocomposite was developed. The Cu content in the composite layer plays a key role in the H2S response of the sensor, with CuO serving as an excellent adsorption site. The sensor's response to H2S is enhanced by the interaction between CuO and H2S, resulting in the formation of CuS and a negative frequency response.
SENSORS AND ACTUATORS A-PHYSICAL
(2023)
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
Materials Science, Multidisciplinary
Zhangliang Xu, Zhifeng Li
Summary: ZnO nanoparticles/quartz surface acoustic wave (SAW) humidity sensors were fabricated and investigated for their sensing performance; the study showed that SAW-Love sensors based on Sezawa mode have great potential in humidity detection applications.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2021)
Article
Chemistry, Analytical
Chenchen Wang, Yanhong Ding, Mingji Li, Hongji Li, Sheng Xu, Cuiping Li, Lirong Qian, Baohe Yang
Summary: The SAW gas sensor utilizes an Au/TiO2/PEDOT sensing film for quantitative detection of water vapor and CO2, with response ranges of 5%-90% for RH and 500-2000 ppm for CO2. Experimental results demonstrate excellent selectivity, wide response range, rapid response, stability, and repeatability of the sensor.
ANALYTICA CHIMICA ACTA
(2022)
Article
Engineering, Electrical & Electronic
Hanyong Dong, Xianhao Le, Kai Pang, Jintao Pang, Dongsheng Li, Zhen Xu, Chao Gao, Jin Xie
Summary: A serial flexible humidity sensor based on GO fiber and QCR was proposed, with the feasibility verified through simulation and experiment. The sensor showed good stability with a potential for higher performance, demonstrating sensitivity, response time, recovery time, and frequency shift characteristics at different humidity levels.
JOURNAL OF MICROMECHANICS AND MICROENGINEERING
(2021)
Article
Chemistry, Analytical
Yuxin Peng, Jingzhi Zhou, Xian Song, Kai Pang, Akram Samy, Zengming Hao, Jian Wang
Summary: A flexible pressure sensor based on porous graphene has been proposed in this work, fabricated by ink printing technology with the potential for large-scale manufacture. The sensor exhibits great sensitivity, high resolution, wide detecting range, desirable robustness, and excellent repeatability, making it suitable for accurately monitoring vital cardiovascular conditions. Compared to sensors based on self-supporting 2D materials, this sensor can withstand more complex environments and has enormous application potential in the medical community.
Article
Multidisciplinary Sciences
Dan Chang, Jingran Liu, Bo Fang, Zhen Xu, Zheng Li, Yilun Liu, Laurence Brassart, Fan Guo, Weiwei Gao, Chao Gao
Summary: This study investigated the reversible fusion and fission of wet-spun graphene oxide fibers, revealing that the dynamic geometric deformation of fiber shells caused by solvent stimulation is crucial for this phenomenon. The principle was further applied to flexible transitions between complex fiber assemblies and the inclusion or expulsion of guest compounds.
Article
Chemistry, Physical
Kai Pang, Xiaoting Liu, Yingjun Liu, Yanru Chen, Zhen Xu, Yao Shen, Chao Gao
Summary: The study presents a highly conductive copper chloride intercalated graphene film (GF-CuCl2) with high-temperature stability and excellent electrical conductivity for EMI shielding applications, exhibiting significantly improved electrical performance and enhanced shielding effectiveness.
Article
Chemistry, Analytical
Jintao Pang, Xianhao Le, Kai Pang, Hanyong Dong, Qian Zhang, Zhen Xu, Chao Gao, Yongqing Fu, Jin Xie
Summary: This study proposes a QCR sensor coated with RGO for detecting the concentrations of CO2 and water molecules, allowing for accurate measurement of CO2 concentration at different humidity levels with fast response time, suitable for respiration monitoring. The sensor successfully detected differences in CO2 concentrations in exhaled breath before and after low-intensity exercise.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Chemistry, Multidisciplinary
Kai Pang, Xiaoting Liu, Jintao Pang, Akram Samy, Jin Xie, Yingjun Liu, Li Peng, Zhen Xu, Chao Gao
Summary: This study presents a highly efficient acoustic absorber by constructing cellular networks of ultrathin graphene membranes into polymer foams. The graphene drums exhibit strong resonances and efficiently dissipate sound waves. This scalable method allows for transforming commercial polymer foams into superior acoustic absorbers.
ADVANCED MATERIALS
(2022)
Article
Engineering, Electrical & Electronic
Jintao Pang, Hanyong Dong, Kai Pang, Xianhao Le, Zhen Xu, Chao Gao, Jin Xie
Summary: This study presents a method for simultaneous detection of CO2 and H2O concentrations using a surface acoustic wave (SAW) resonator. The sensor shows low measurement error and excellent short-term stability, and the method can be applied to other types of resonator-based sensors.
IEEE ELECTRON DEVICE LETTERS
(2022)
Article
Nanoscience & Nanotechnology
Zeshen Li, Fan Guo, Kai Pang, Jiahao Lin, Qiang Gao, Yance Chen, Dan Chang, Ya Wang, Senping Liu, Yi Han, Yingjun Liu, Zhen Xu, Chao Gao
Summary: In this study, a precise thermoplastic forming method for graphene materials is presented by polymer intercalation. The thermoplasticity of graphene oxide (GO) solids is achieved by the thermal activation of polymer chains. The plastic-formed structures retain their integrity and exhibit excellent electrical and thermal conductivity. This thermoplastic strategy greatly expands the forming capability of graphene materials and promises versatile structural designs for a variety of applications.
NANO-MICRO LETTERS
(2022)
Article
Physics, Applied
Fan Guo, Cao Yang, Zhen Xu, Chao Gao
Summary: Carbon aerogels are emerging carbon-based cellular materials with high porosity, low density, and a variety of functions. However, their wide applications are limited by poor mechanical robustness. This article discusses strategies for optimizing mechanical robustness and concludes advanced design principles for achieving stretching elasticity without introducing elastomers.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Chemistry, Physical
Huanqin Peng, Xin Ming, Kai Pang, Yanru Chen, Ji Zhou, Zhen Xu, Yingjun Liu, Chao Gao
Summary: This study presents an efficient catalytic graphitization approach to fabricate highly conductive graphene papers at lower annealing temperature. The use of boron catalyst facilitates the recovery of structural defects and improves the degree of graphitization. This effective strategy could also be helpful in the fabrication of other kinds of highly conductive graphene macroscopic materials.
Article
Chemistry, Physical
Jiahui Hu, Ye Qiu, Xueer Wang, Lelun Jiang, Xiaoyan Lu, Ming Li, Zhiqiang Wang, Kai Pang, Ye Tian, Wenan Zhang, Zhen Xu, Hengjie Zhang, Hangcheng Qi, Aiping Liu, Zheng Zhang, Huaping Wu
Summary: This study presents a flexible six-dimensional force sensor inspired by traditional Chinese ancient architecture, which can simultaneously perceive 3D force and moment. It is applicable for precise correction and orthodontic treatment.
Article
Chemistry, Multidisciplinary
Dongsheng Li, Boyi Zhu, Kai Pang, Qian Zhang, Mengjiao Qu, Weiting Liu, YongQing Fu, Jin Xie
Summary: This study proposes a virtual sensor array (VSA) based on a piezoelectric cantilever resonator with a graphene oxide sensing layer for real-time sensing of various VOCs. By using different groups of top electrodes, high amplitudes of multiple resonance peaks for the cantilever can be obtained, resulting in low limits of detection (LODs) for VOCs. With the help of machine learning algorithms, the VSA can accurately identify different types of VOCs and mixtures. Furthermore, the VSA has been successfully applied to identify emissions from healthy plants and plants with late blight.
Review
Physics, Applied
Fang Wang, Wenzhang Fang, Xin Ming, Yingjun Liu, Zhen Xu, Chao Gao
Summary: Graphene oxide (GO), a two-dimensional oxidized derivative of graphene, has unique molecular science and fluid physics, making it important for the development of graphene-based macroscopic materials. In order to fully utilize the properties of graphene in real-world applications, comprehensive understanding of the chemistry, physics, and structure-property relations of GO and graphene is necessary. Recent progress in the science, technology, and engineering of GO colloidal macromolecules has been summarized, with a focus on molecular conformation, liquid crystal behavior, relaxation behavior, and fusion/fission dynamics.
APPLIED PHYSICS REVIEWS
(2023)
Article
Chemistry, Multidisciplinary
Jingyu Ma, Xiaodan Huo, Jun Yin, Shengying Cai, Kai Pang, Yingjun Liu, Chao Gao, Zhen Xu
Summary: This study presents a method for continuously integrating stiff and soft elastic components into individual fibers through programmable microfluidic sequence spinning. The resulting mechano-metafibers exhibit two important nonlinear deformation modes - local strain amplification and retardation - which enable the design of highly sensitive strain sensors, stretchable fiber devices, high-voltage supercapacitors, and axial electroluminescent arrays.
ADVANCED MATERIALS
(2023)
