Article
Acoustics
Ismaeel Shah, Tridib Saha
Summary: This paper reports on the simulation and fabrication of langasite resonators with stepped elliptical electrode designs in order to investigate their effects on trapping energy and suppressing spurious modes at high temperatures. Finite element analysis was conducted to analyze the design of a stepped elliptical electrode on a contoured langasite crystal. Based on the simulation findings, langasite resonators with stepped electrodes were fabricated, and their displacement profiles and frequency-temperature properties were characterized using network analysis and laser Doppler vibrometry. The results demonstrate improved frequency separation between the resonant and spurious modes, and enhanced spurious mode suppression at both room and higher temperatures, suggesting that stepped elliptical electrode designs can effectively enhance the sensing performance of langasite resonators.
Article
Optics
Ning Chen, Changning Liu, Zhiqi Lu, Wuqiang Tao, Min Peng
Summary: This article demonstrates an ultra-compact fiber inline Mach-Zehnder interferometer sensor based on femtosecond laser micromachining technology. The sensor exhibits ultra-high refractive index sensitivity, but its temperature sensitivity is similar to that of other fibers, showing excellent robustness.
Article
Engineering, Electrical & Electronic
Ling Li, Bin Peng, Jialiang Zhu, Zhengxi He, Yuntao Yang, Wanli Zhang
Summary: A surface acoustic wave strain sensor consisting of three langasite surface acoustic wave resonators was presented in this study to cancel the temperature dependency. The strain sensitivities of the resonators were investigated over a temperature range of 20 to 250 degrees C, demonstrating linear representation of strain by resonance frequency shifts. Experimental results showed the sensor could accurately measure strains with a small error margin.
IEEE SENSORS JOURNAL
(2021)
Article
Chemistry, Physical
Haiyan Zhao, Xiaole Yu, Mengjun Li, Qiangqiang Guo, Huijing Yang, Yu Gu, Fanlin Li
Summary: Novel ternary perovskite piezoceramics, BS-xPT-BZN, with high piezoelectric performance and wide temperature range were synthesized and investigated. These ceramics can be used to construct piezoelectric devices in harsh high-temperature environments.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Analytical
Thierry Aubert, Ninel Kokanyan, Omar Elmazria
Summary: This study investigates the stability of Langasite (LGS) crystal surfaces in high-temperature air environments, revealing the formation of surface defects due to prolonged exposure to high temperatures. These defects, likely related to the formation of a new phase, oxiapatite ternary compound, impact the surface acoustic properties of LGS crystals, potentially leading to temperature measurement errors in LGS-based SAW sensors operating in the 434 MHz ISM band.
Article
Optics
Yuanyang Zhao, Desheng Zhu, Yourui Tu, Lingling Pi, Hongtao Li, Lin Xu, Zhijia Hu, Yuecheng Shen, Benli Yu, Liang Lu
Summary: This study presents an all-fiber self-mixing laser Doppler velocimetry based on frequency-shifted feedback in a distributed feedback (DFB) fiber laser, utilizing fiber-coupled acousto-optic modulators to adjust the modulation intensity and frequency of the laser self-mixing effect. The results demonstrate that the proposed scheme can adapt to the non-contact measurement requirements of wide-range speed and weak feedback level in complex environments.
Article
Optics
Simin Cao, Xinggang Shang, Hongyan Yu, Liping Shi, Lei Zhang, Ning Wang, Min Qiu
Summary: In this study, a fiber-tipped Fabry-Perot interferometer (FPI) for liquid refractive index (RI) measurement is proposed and demonstrated using two-photon polymerization lithography. The FPI is designed with an open-cell microstructure for compatibility with the aqueous environment. The sensor exhibits high RI sensitivity and low detection limit, making it suitable for chemical and biological sensing applications.
Article
Materials Science, Multidisciplinary
Zhengran Chen, Ruihong Liang, Chi Zhang, Zhiyong Zhou, Yuchen Li, Zhenming Liu, Xianlin Dong
Summary: In this study, high piezoelectric properties and superior thermal stability were achieved by high-temperature poling in a 0.4 mol% ZnO-doped ceramic material. The high-temperature poling method formed a small-sized and highly oriented domain structure, effectively improving the piezoelectric and dielectric properties. The enhanced pinning effect of defect ions and stabilized domain structure due to high-temperature poling also contributed to the superior temperature stability of the piezoelectric and dielectric properties.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Xiaorui Liang, Lei Zhang, Fangmeng Xu, Yongwei Zhang, Qiulin Tan, Jijun Xiong
Summary: This paper proposes a new method for manufacturing microstructure equipment and technology in high-temperature environments using Langasite (LGS). By utilizing a special etching and hot-press bonding method, a high-temperature pressure sensor was successfully fabricated. Experimental results showed that the pressure sensor exhibited excellent stability and sensitivity at 1100 degrees C.
Article
Optics
Yifan Wang, Yuhang Li, Xin Xu, Mingwang Tian, Kaiyi Zhu, Yidong Tan
Summary: A novel interferometry method based on laser feedback technique for long distance transmission is proposed, showing high sensitivity and simple structure. A compensation method is designed to reduce drift and improve displacement resolution, making it promising for practical applications in remote sensing or harsh conditions.
Article
Engineering, Multidisciplinary
Hideaki Nozato, Wataru Kokuyama, Tomofumi Shimoda, Hajime Inaba
Summary: A new primary calibration method for LDV was proposed using optical modulated excitation and validated by comparison with mechanical modulated excitation and homodyne laser interferometer at NMIJ. The study found that the velocity sensitivities between optical and mechanical modulated excitations are flat within their uncertainty from 100 Hz up to 1 MHz. Additionally, the reliability of two time shifts between homodyne and heterodyne laser interferometers in evaluating accurate phase shift of the accelerometer up to 20 kHz using optical modulated excitation was revealed.
PRECISION ENGINEERING-JOURNAL OF THE INTERNATIONAL SOCIETIES FOR PRECISION ENGINEERING AND NANOTECHNOLOGY
(2021)
Article
Optics
Qi Xia, Yu-Rong Liang, Hao Yan, Zhi-Lin Xu, Li Liu, Ze-Bing Zhou
Summary: The paper introduces a high-precision lateral displacement measurement method based on differential wavefront sensing. The method utilizes the curvature distribution of the wavefront to obtain the beam lateral displacement and improves sensitivity by increasing the wavefront curvature. Experimental results demonstrate its high resolution and linear range, making it suitable for high-precision interferometers.
Article
Materials Science, Ceramics
Jie Wu, Gaochao Zhao, Chengbing Pan, Peng Tong, Jie Yang, Xuebin Zhu, Lihua Yin, Wenhai Song, Yuping Sun
Summary: By co-doping Cr-Mn into BiFeO3-BaTiO3 ceramics, a series of samples near morphotropic phase boundaries were successfully constructed, exhibiting high ferroelectric and piezoelectric properties. The enhanced ferroelectric Curie temperature was attributed to the combined effects of large lattice distortion and high tetragonal phase content, providing an effective route to realize high-temperature and high piezoelectricity.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Chemistry, Analytical
Xuhang Zhou, Qiulin Tan, Xiaorui Liang, Baimao Lin, Tao Guo, Yu Gan
Summary: A new high-temperature SAW sensor based on a LGS substrate was developed in this study, with improved crystallization quality of Pt film achieved by an AlN passivation layer. This ensures the functionality and stability of the device at extreme temperatures.
Article
Chemistry, Analytical
Juan Zhang, Qiulin Tan, Lei Zhang, Nan Zhao, Xiaorui Liang
Summary: A novel Langasite (LGS) bonding method using high temperature was proposed to solve the manufacturing difficulty of the sealed microcavity of pressure sensors. This method has simple experimental conditions, low experimental cost, and is suitable for bonding wafers with various sizes, making it convenient for popularization and mass-production, thus promoting the development of surface acoustic wave (SAW) devices at high temperatures. The bonded wafer with the sealed microcavity exhibited a high bonding strength and excellent seal performance, while the piezoelectric constant of the LGS bonded wafer had only a slight reduction compared to the original wafer. The mechanism of LGS bonding has also been investigated for the first time based on bonding interface characterizations.
Article
Chemistry, Analytical
Mengmeng Guo, Na Luo, Yueling Bai, Zhenggang Xue, Qingmin Hu, Jiaqiang Xu
Summary: A porous heterostructure WO3-C/In2O3 was designed and prepared for a miniature H2 sensor, which showed higher response value, lower operating temperature, fast response-recovery speed, and low limit of detection.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Feng Hu, Hui Hu, Yuting Li, Xiaohui Wang, Xiaowen Shi
Summary: Arsenic contamination in water bodies is a significant health risk. This study developed a chitosan-catechol modified electrode for rapid and accurate detection of trace amounts of arsenic. The modified electrode demonstrated good detection capability and resistance to ionic interference, making it suitable for in situ detection.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Yantao Zhang, Qian Liu, Tao Tian, Chunhua Xu, Pengli Yang, Lianju Ma, Yi Hou, Hui Zhou, Yongjun Gan
Summary: In this study, a lysosome-targeting buffering fluorogenic probe (Lyso-BFP) was designed and synthesized, demonstrating excellent photostability, pH specificity, and responsiveness to lysosomal acidification in living cells. The performance of Lyso-BFP in pH sensing was attributed to the inhibition of the photo-induced electron transfer process. Lyso-BFP allowed for wash-free imaging and long-term real-time monitoring of lysosome pH changes based on its off-on fluorescence behavior and buffer strategy.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Wei Cai, Wenbo Sun, Jiayue Wang, Xiaokui Huo, Xudong Cao, Xiangge Tian, Xiaochi Ma, Lei Feng
Summary: In this study, a near-infrared fluorescent probe HCBG was developed for imaging of alpha-GLC. HCBG exhibited excellent selectivity and sensitivity towards alpha-GLC in complex bio-samples, and showed good cell permeability for in situ real-time imaging. Through the high-throughput screening system established by HCBG, a natural alpha-GLC inhibitor was successfully isolated and identified. This study provides a novel fluorescence visualization tool for discovering and exploring the biological functions of diabetes-related gut microbiota, and a high-throughput screening approach for alpha-GLC inhibitor.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Trey W. Pittman, Xi Zhang, Chamindie Punyadeera, Charles S. Henry
Summary: Heart failure is a growing epidemic and a significant clinical and public health problem. Researchers have developed a portable and affordable diagnostic device for heart failure that can be used at the point-of-care, providing a valid alternative to current diagnostics approaches.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Anders O. Tjell, Barbara Jud, Roland Schaller-Ammann, Torsten Mayr
Summary: An optical hydrogen peroxide sensor based on catalytic degradation and the detection of produced oxygen is presented. The sensor offers higher resolution and better sensitivity at lower H2O2 concentrations. By removing O2 from the sample solution, a more sensitive O2 sensor can be used for measurement. The sensor has been successfully applied in a flow-through cell to measure H2O2 concentration in different flow rates.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Seong Jae Kim, Ji-hun Jeong, Gaabhin Ryu, Yoon Sick Eom, Sanha Kim
Summary: Surface-enhanced Raman spectroscopy (SERS) is a high-sensitivity, label-free detection method with various analytical applications. Researchers have developed a hydrophobic SERS substrate based on engineered carbon nanotube arrays (CNT-SERS) and studied the role of structural design at both micro and nanoscales. The substrate demonstrated controlled self-enrichment capability and enhanced sensitivity, with a significant increase in the SERS signal. The study also proposed a theoretical model and a concentration strategy inspired by plants for analyte deposition on microarrays.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Dan Zhao, Renjun Jiang, Xiaoqiang Liu, Subbiah Alwarappan
Summary: In this study, a novel ternary composite material was constructed by assembling cerium vanadate nanorods on reduced graphene oxide-microcrystalline cellulose nanosheets, and it was used for real-time monitoring of the concentration of superoxide anions in vivo. The ternary composite showed excellent conductivity, large surface area, and abundant active sites, leading to a wider linear range, high sensitivity, low detection limit, and fast response time for superoxide anion detection.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Tengfei Wang, Liwen Wang, Guang Wu, Dating Tian
Summary: In this study, a covalent organic framework material TaTp-COF with porous and uniform spheres was successfully prepared via hydrothermal reaction, and it was found to significantly enhance the aggregation-induced emission (AIE) of berberine. The unique emission properties of berberine on TaTp-COF were studied and utilized for the sensitive detection of berberine.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Lin Li, Yilei Ding, Lei Xu, Shuoran Chen, Guoliang Dai, Pengju Han, Lixin Lu, Changqing Ye, Yanlin Song
Summary: In this study, a novel TTI based on a ratiometric fluorescent nanosensor is designed, which has the advantages of high accuracy and low cost. Experimental and theoretical investigations confirm its pH responsiveness and demonstrate its good sensitivity and reliability. By monitoring the total volatile basic nitrogen, this TTI can accurately predict food spoilage and can be adaptively modified for different types of food. The TTI based on this nanosensor enables visual monitoring of food quality.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Fangju Chen, Xueting Wang, Wei Chen, Chenwen Shao, Yong Qian
Summary: Lung cancer is the second most common malignant tumor worldwide. Drug resistance in lung cancer leads to treatment failure and recurrence in majority of patients. This study developed a fluorescent prodrug that can be activated in cancer cells to release drugs, and its signal can be tracked by imaging. It shows a unique autophagy-driven ferroptosis effect, indicating its potential for targeting drug-resistant cancer cells.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Weichao Li, Qiming Yuan, Zhangcheng Xia, Xiaoxue Ma, Lifang He, Ling Jin, Xiangfeng Chu, Kui Zhang
Summary: This study developed a high-performance gas sensor for formaldehyde detection by modifying ZnSnO3 with ZnO QDs and SnO2 QDs. The modified sensor showed improved sensing response and lower working temperature. The presence of ZnO QDs formed rich heterojunctions, increased surface area, and provided oxygen deficiency for formaldehyde sensing reaction, thus enhancing the sensor performance. This research provides an alternative method to enhance the sensing properties of MOS by QDs modification.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Joung-Il Moon, Eun Jung Choi, Younju Joung, Jin-Woo Oh, Sang-Woo Joo, Jaebum Choo
Summary: A novel nanoplasmonic substrate was developed for biomedical applications, which showed strong hot spots for detecting biomarkers at low concentrations. The substrate, called AuNPs@M13, was made by immobilizing 60 nm gold nanoparticles onto the surface of an M13 bacteriophage scaffold. It demonstrated higher sensitivity and lower limit of detection compared to commercially available assays.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Ning Li, Ya Zhang, Ying Xu, Xiaofang Liu, Jian Chen, Mei Yang, Changjun Hou, Danqun Huo
Summary: The molecular subtype of breast cancer guides treatment and drug selection. Invasive tests can promote cancer cell metastasis, so the development of high-performance, low-cost diagnostic tools for cancer prognosis is crucial. Liquid biopsy techniques enable noninvasive, real-time, dynamic, multicomponent, quantitative, and long-term observations at the cellular, genetic, and molecular levels. A Cu-Zr metal-organic framework (MOF) nanoenzyme with monatomic Cu attachment has been synthesized and proven to have high catalytic performance. The sensor constructed using this nanoenzyme shows potential for accurate classification of breast cancer serum samples.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Jeongmin Kim, Hyemin Kim, Seunghyun Park, Hyeonaug Hong, Yong Jae Kim, Jiyong Lee, Jaeho Kim, Seung-Woo Cho, Wonhyoung Ryu
Summary: This study presents a method to fabricate independently functioning microneedle (MN) electrodes with narrow intervals for high precision electrochemical sensing. The optimized mixture of photocurable polymer and single-wall carbon nanotubes was used to mold single composite MNs, which were then attached to pre-patterned electrodes. Plasma etching and electropolymerization were performed to enhance the electrochemical activity, and Prussian blue and glucose oxidase were electrodeposited on the MNs for glucose detection. The MN electrodes showed good sensitivity and linearity, and the feasibility of glucose detection was demonstrated in an in vivo mouse study.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)