Article
Chemistry, Analytical
Tsuyoshi Tsukada, Ryusei Takigawa, Yoshihiro Hasegawa, Muhammad Salman Al Farisi, Mitsuhiro Shikida
Summary: A tube-integrated flow sensor was developed by integrating a MEMS flow-sensing element and electrical wiring structure on a COP substrate. The substrate was rolled into a circular tube with the flow-sensing element placed at the center. The signal lines were formed and connected to the Cu layer of the substrate during fabrication, simplifying the electrical connection process. By implementing slits on the substrate, the sensing element was positioned at the center where the flow velocity is maximum, doubling the sensor's sensitivity.
Article
Multidisciplinary Sciences
Feng Niu, Fugong Zhou, Zhixun Wang, Lei Wei, Jie Hu, Lei Dong, Yifei Ma, Mei Wang, Suotang Jia, Xuyuan Chen, Zhaomin Tong
Summary: Doped Si/SiO2 fibers were prepared as substrates to fabricate MOS gas sensors, overcoming the limitations of traditional MOS gas sensors in wearable devices. Co-doped ZnO nanorods were in situ synthesized on the fiber surface to create a methane gas sensor. The doped Si core acted as a heating source, reducing heat loss, while the SiO2 cladding served as an insulating substrate. The gas sensor was integrated into a wearable device and real-time monitoring of CH4 concentration was achieved using different colored LEDs. This study demonstrated the feasibility and advantages of using doped Si/SiO2 fibers for wearable MOS gas sensors.
Article
Chemistry, Analytical
Yongfeng Mu, Pengfei Jin, Li Zheng, Chao Wang, Yanjie Hou, Weiwei Liu, Liangyou Si, Zhihui Liu
Summary: In this study, the humidity sensing performance of a polyimide capacitive-type relative humidity sensor was enhanced by incorporating modified halloysite nanotubes (HNTs) in the sensing layer. The modified sensor exhibited enhanced sensitivity, low humidity hysteresis, and good linearity, making it promising for humidity measurement.
MICROCHEMICAL JOURNAL
(2023)
Review
Chemistry, Analytical
Jiayi Yang, Yuanyuan Chen, Shuoyan Liu, Chang Liu, Tian Ma, Zhenmin Luo, Gang Ge
Summary: Flexible stress sensor arrays consisting of multiple units enable accurate analysis of spatial stress distribution. However, the current implementation faces challenges such as excessive signal wires, reduced deformability, stability, and increased costs. To overcome these challenges, the single-line multi-channel signal (SLMC) measurement method has been developed, reducing the number of signal wires and improving stability and reliability. This review provides a comprehensive understanding of SLMC measurement, including different sensing mechanisms, arraying methods, and the research status.
Article
Engineering, Electrical & Electronic
Cecile Ghouila-Houri, Abdelkrim Talbi, Romain Viard, Thomas Arnoult, Munique Kazar-Mendes, Aurelien Mazzamurro, Quentin Gallas, Eric Garnier, Alain Merlen, Philippe Pernod
Summary: This paper presents the first demonstration of aerodynamic wall pressure measurement using a thermal Pirani effect based micro-sensor, which successfully measured the pressure changes in a turbulent boundary layer wind tunnel.
IEEE SENSORS JOURNAL
(2022)
Article
Engineering, Multidisciplinary
M. Ebbeni, M. Gehlot, M. Holz, H. Tarawneh
Summary: The Pulsed Wire method is a promising solution for local magnetic field measurements in undulators that have limited access. This paper presents a flexible framework for calculating the magnetic field and correcting for errors, improving the confidence in the results.
Article
Polymer Science
Ruqian Sun, Jiaqing Xie, Xiaoyu Meng, Haoran Pang, Chuchu Gong, Fuyang Zhou
Summary: This research proposed a flexible piezoresistive tactile sensor with imprinted microsphere array, which can accurately and stably acquire human motion data. Experimental results showed that the sensitivity of the sensor can be improved by reducing the chord height, and the composite structure with PDMS/carboxylated MWCNT/PI membrane can enhance the sensitivity and reduce the detection limit. Multipoint imprinting technology is an efficient processing method to obtain a high consistency microsphere array.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Nanoscience & Nanotechnology
Mengxue Luo, Zhangming Liu, Qi Wang, Rui Liu, Yuan Xu, Ke Wang, Xinzhi Shi, Shuangli Ye
Summary: This study focuses on the application of surface engineering to fabricate low-cost Ag/PI wireless humidity sensors with a resonant frequency of 2.45 GHz. The sensors are obtained through in situ metallization technique coupled with inkjet printing, with PI playing multiple roles as a flexible substrate, ionexchange surface, and sensing material to moisture. By loading different ions on the PI surface to improve hydrophilicity, the humidity sensitivity is enhanced. The wireless humidity sensor loaded with K+ ions shows the maximum sensitivity at both low and high relative humidity ranges. The sensor also demonstrates excellent mechanical performance and stability, making it suitable for real-time humidity monitoring in automated industry and healthcare.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Hyun-Soo Jeon, Wenhui Yao, Kyeong-Hwan Kim, Jun-Hyung Sim, Young-Rae Cho
Summary: A flexible electrode material with good surface amphiphobicity and mechanical and chemical stability was fabricated using a simple process. The material consisted of a superhydrophobic and electrically conductive silver nanopillar array formed on a polyimide substrate. The material exhibited excellent durability and stability, making it a promising candidate for flexible electrode applications.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2023)
Article
Polymer Science
D. A. Sapegin, G. N. Gubanova, E. V. Kruchinina, A. Ya Volkov, E. N. Popova, M. E. Vylegzhanina, K. Setnickova, S. V. Kononova
Summary: This study discusses the relationship between the structural and morphological features of sulfonated co-polyimide and its selective transport properties. Experimental and theoretical studies show that the copolymer exhibits good separation performance.
Article
Engineering, Chemical
Shenzhen Cong, Ye Yuan, Jixiao Wang, Zhi Wang, Xinlei Liu
Summary: Novel polymeric membranes prepared via a simple interfacial polymerization method using low-cost monomers exhibit excellent performance in H-2/CO2 separation, surpassing the upper bound. The membranes also show robust performance after treatment with steam and H2S.
Article
Engineering, Electrical & Electronic
Xue Gong, Kai Huang, Yu-Hang Wu, Xiao-Sheng Zhang
Summary: The application of screen-printed flexible sensors in the field of human health monitoring has great potential. This article firstly introduces the manufacturing process and advantages of screen printing in terms of ink control, high resolution printing, and thickness controllability. Then, it analyzes the different applications of flexible sensors in health monitoring and emphasizes the low-cost and large-scale fabrication advantages of screen printing technology. Finally, it summarizes the opportunities, challenges, and prospects of screen-printed flexible sensors in smart wearable electronics and human health monitoring, as well as proposes the feasibility of flexible sensor electronics in building smart wearable microsystems based on screen printing technology.
SENSORS AND ACTUATORS A-PHYSICAL
(2022)
Article
Engineering, Electrical & Electronic
Shasha Yang, Jinwei Miao, Ting Lv, Wenjun Zhang, Guojun Zhang, Chenyang Xue, Wendong Zhang, Renxin Wang
Summary: A lollipop-shaped cilia sensor based on MEMS technology was designed to measure ocean turbulence, successfully detecting turbulence signals in the 0-200 Hz range. The sensor structure improved sensitivity and signal receiving area, with calibration experiments showing high sensitivity and accurate measurement of two-dimensional ocean turbulence.
SENSORS AND ACTUATORS A-PHYSICAL
(2021)
Article
Engineering, Electrical & Electronic
Xiaohu Liu, Wei He, Pan Guo, Yuhang Yang, Taoning Guo, Zheng Xu
Summary: This article presents a semi-contactless power measurement method for residential homes, which involves using magnetic sensors for current detection and a capacitively coupling voltage sensor for voltage measurement. The proposed method has been tested in both lab and field settings, showing a power measurement error of less than 5%, making it suitable for home energy tracking.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2022)
Article
Nanoscience & Nanotechnology
Zhi-Hui Zeng, Na Wu, Jing-Jiang Wei, Yun-Fei Yang, Ting-Ting Wu, Bin Li, Stefanie Beatrice Hauser, Wei-Dong Yang, Jiu-Rong Liu, Shan-Yu Zhao
Summary: Lightweight, ultra-flexible, and robust crosslinked transition metal carbide coated polyimide porous composites exhibit excellent EMI shielding performance and multifunctionalities, with promising perspectives in next-generation flexible electronics, aerospace, and smart devices.
NANO-MICRO LETTERS
(2022)
Article
Engineering, Electrical & Electronic
Kehao Feng, Zhenghua Zhang, Guohua Bai, Xiuyuan Fan, Rongzhi Zhao, Xuefeng Zhang
Summary: This paper proposes a new method to accurately evaluate the high-frequency power loss of soft magnetic materials. Through a two-step calibration, the system is able to compensate for the phase angle discrepancy between the exciting current and induced voltage, enabling a higher power loss measurement frequency.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
Mingfang Kang, Tong Liu, Hongmei Sun, Lin Li, Keliang Wang
Summary: In this study, the absorption performance of ambient nitrogenous toxic gases on a monolayer of blue phosphorus phase germanium selenide (GeSe) was investigated using density-functional theory calculations. The results showed that GeSe monolayer exhibits higher sensitivity and selectivity for the hazardous gas NO.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
Yaqiong Niu, Zhicheng Zou, Longsheng Cheng, Chaofeng Ye
Summary: This paper proposes a novel method to stabilize the laser diode output using a close-loop control with two feedbacks. The proposed method performs better for long-time operations.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
Jiajie Li, Ying Liu, Zhen Chai, Qian Cao, Renjie Li, Yueyang Zhai
Summary: This study proposed an efficient and high-quality beam-splitting method based on a diffractive optical element, enabling multichannel SERF atomic magnetometers to achieve ultra-high consistency and sensitivity. It has significant applications in array biomagnetic measurement systems.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
E. Oliveira, C. Doering, H. Fouckhardt
Summary: With the development of Lab on a chip technology, fluid management using dispersed droplets has become an important approach. Electrowetting on dielectric (EWOD) is one method for droplet actuation, but it requires prior definition of droplet positions. Optoelectrowetting (OEW) goes further by allowing changes in electrical parameters through impinging light spots, without the need for predefined droplet positions. This study re-evaluates the key parameters of OEW and explores their effects on droplet actuation using numerical optimization methods.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
Haipeng Wang, Zhiguo Wang, Gancheng Zhu, Shuai Zhang
Summary: A novel capacitive proximity skin was developed to improve the performance of robotics in handling liquid-filled containers. This skin features a flexible structure that can adapt to different grippers and seamlessly integrate with Robot Operating System. Experimental results demonstrated that this proximity skin achieved data-lossless detection and contactless measurement of liquid level, making it suitable for grasping operations.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
Tsenguun Byambadorj, Xiangyu Zhao, Yutao Qin, Yogesh B. Gianchandani
Summary: In this research, a monolithically microfabricated Knudsen pump (KP) without suspended membranes was presented. These pumps offer improved mechanical robustness, wider process window, and simplified microfabrication process compared to previous designs. The experimental results matched the modeling results well, indicating the potential for monolithic integration onto complex lab-on-a-chip systems.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
Hamed Karami, Saeed Karami Chemeh, Vahid Azizi, Hooman Sharifnasab, Jose Ramos, Mohammed Kamruzzaman
Summary: Aroma is a significant quality trait for pharmaceutical plants and their products, indicating the quality of the raw material. An electronic nose is an efficient approach for identifying and evaluating the aroma of essential oils. In this study, tarragon was dried at different temperatures and air velocities, and the purity of tarragon essential oil was evaluated using an electronic nose. Multivariate data analysis and artificial neural networks modeling were employed to quantify and classify the obtained essential oils.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
Xiaoyang Duan, Dan Xu, Wenjun Jia, Ran Li, Bohao Sun, Ruitian Yan, Wenjie Zhao
Summary: Flower-like WO3/WS2 heterojunction materials constructed via a low-temperature in-situ oxidation method exhibit significant improvements in the detection of NO2 gas in gas sensors, along with good selectivity and reproducibility.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
Peng Yu, Mengyang Zhang, Manqi You, Yuxi Gao, Landong Xiao, Yan Peng, Jingxia Lai, Zhouzhao Shi, Siwei Luo, Gencai Guo, Gang Guo
Summary: Recent studies have shown that two-dimensional Janus transition metal dichalcogenides (TMDs) have great potential for applications in gas sensors. By conducting first principles calculations, this study explores the potential application of Pd-doped monolayer HfSeS as gas sensor materials for detecting CO, CO2, NH3, and NO. The results demonstrate the good thermodynamical stability and reversible adsorption of these molecules on both pristine and Pd-doped HfSeS, with Pd-doped HfSeS showing higher sensitivity towards NO due to its metallic behavior upon NO adsorption.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
Jinlan Yang, Linjiao Li, Jun Huang, Quan Zhang, Hiba Affane
Summary: This study proposes a method for large-scale aggregation of micro-particles by creating a vortex region using low-frequency oscillation. Experimental results show that this method can achieve a large aggregation area and has the advantages of low cost and low power consumption.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
Jitendra Singh, Saurabh Kumar Gupta, Vinita
Summary: In this investigation, a Surface Acoustic Wave (SAW) formalin gas sensor was explored for low-level formalin gas sensing applications. The sensor showed stable response and high sensitivity to formalin gas concentration, making it a reliable and useful sensor for room temperature operations.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
Junyao Wang, Yahao Liu, Huan Liu, Qi Hou, Jianxin Xu, Hongxu Pan, Jingran Quan, Yansong Chen, Hanbo Yang, Lixiang Li
Summary: A flexible electrode with a serpentine-shaped tetra-chiral structure was designed to improve the mechanical properties and prevent mechanical fracture of flexible electrodes. The research demonstrated that this structure reduced the maximum tensile stress by 87.19% compared to the existing tetra-chiral structure. The flexible electrode remained conductive even at a strain of 70% and showed resistance values of 5 ohm and 4.4 ohm at a bending angle of 180 degrees and after 1000 fold cycles. Furthermore, the flexible electrodes showed great potential in biological signal monitoring, particularly in collecting ECG and pulse signals.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
Taihao Chen, Yong Fang, Mengru Zhu, Zhiwei Zhao, Wei Lei, Zhuoya Zhu, Helong Jiang
Summary: Flexible dual-spectral carbon nanodots/flexible n-silicon heterojunction photodetectors with high responsivity and detectivity are reported. These detectors show photo response in UV illumination and only in forward bias under visible illumination. The photocurrent of the device remains high even under bending strain.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
M. S. Sikandar Bathusha, Israr Ud Din, Rehan Umer, Kamran A. Khan
Summary: Graphene-based nanomaterials are used as embedded sensors to monitor fracture behavior in composite structures. This study investigates the in-situ crack propagation and fracture behavior in a glass fiber reinforced polymer composite using embedded reduced graphene oxide coated fabrics and highly conductive graphene nanoplatelet paper.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)