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
Chemistry, Analytical
Wendan Jia, Qiang Zhang, Yongqiang Cheng, Jie Wang, Hulin Zhang, Shengbo Sang, Jianlong Ji
Summary: The article presents a high-resolution, capacitive, paper-based, 3D-printed pressure sensor with wide detection range, short response time, and high mechanical stability. It discusses its application in precise weight measurement and gait detection, highlighting the advantages of low-cost, high sensitivity, wide detection range, and mass-production capability.
Article
Chemistry, Physical
Lihao Guo, Zekun Li, Wenwen Hu, Taoping Liu, Youbin Zheng, Miaomiao Yuan, Yujie Dai, Ruizhi Ning, Yujin Zhu, Keyu Tao, Min Zhang, Tao Du, Lu Zhang, Chen Su, Hossam Haick, Weiwei Wu
Summary: This study presents the design and production of a multifunctional high-performance pressure sensor with dual microstructures of surface micro-bumps and internal hollow pores in a conductive material, an MXene. The sensor demonstrates ultra-high sensitivity, wide detection range, and stability in various human physiological and anatomical movement types. Data mining methods are used to extract gesture behavioral information and physiological information from the sensor signals, showing potential for motor function assessment and human-robot interaction applications.
JOURNAL OF MATERIALS CHEMISTRY A
(2021)
Article
Engineering, Electrical & Electronic
K. Thiyagarajan, G. K. Rajini, Debashis Maji
Summary: The paper introduces a low-cost, non-invasive paper-based sensor for respiration monitoring, utilizing the humidity sensing properties of paper. The composite interdigitated electrodes of the sensor exhibit fast response times and are suitable for monitoring different breathing conditions, making it a potential wearable product during the current COVID-19 pandemic situation.
IEEE SENSORS JOURNAL
(2021)
Article
Chemistry, Multidisciplinary
Neha Sakhuja, Rahul Kumar, Prateek Katare, Navakanta Bhat
Summary: This paper proposes a low-cost hierarchical construction strategy to enhance the sensitivity of a paper-based piezoresistive pressure sensor and demonstrates its practical applications in human-machine interfacing and biodegradation.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2022)
Article
Engineering, Electrical & Electronic
Akshaya Kumar Aliyana, Priyanka Ganguly, Ajay Beniwal, S. K. Naveen Kumar, Ravinder Dahiya
Summary: The estimation of pH is crucial in various applications, and this study presents a screen-printed flexible and disposable pH sensor that uses the impedimetric method. The sensor exhibits high sensitivity and can be used for pH monitoring of soil, potentially contributing to digital agriculture.
IEEE SENSORS JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Dan Liu, Yaxin Zhao, Zhuqing Yan, Zhidong Zhang, Yanjun Zhang, Peng Shi, Chenyang Xue
Summary: A flexible thermoelectric generator (F-TEG) based on screen printing of n-type Ag2Se/PVP film showed optimal thermoelectric performance at a ratio of 30:1. The F-TEG demonstrated good output voltage and power at a temperature difference of 40K, providing a simple and efficient preparation solution for environmentally friendly and wearable thermoelectric devices.
Article
Chemistry, Physical
Xingchen Ma, Yan Qi, Yangyang Niu, Qi Zhang, Xinhao Xiang, Ke Zhang, Pengfei He, Ying Dai, Wenxin Niu, Xiaoqing Zhang
Summary: A highly sensitive flexible film pressure sensor with a folded structure assembled from irradiation-cross linked polypropylene (IXPP) piezoelectret film is reported. The sensor achieves enhanced sensitivity, high signal-to-noise ratio, and excellent anti-interference capacity. It can detect low-frequency human motion and weak physiological signals in a non-contact mode, simplifying the monitoring system design.
Article
Polymer Science
Xinyue Zhang, Yubo Wang, Dong Fu, Guojun Wang, Hao Wei, Ning Ma
Summary: Conductive thermo-responsive inks were prepared by combining photo-thermal converting polyaniline and conductive ionic liquids. These inks can be used to print flexible thermal sensors which exhibit thermal sensitivity under near infrared irradiation, showing changes in conductivity. This low-cost and easy-to-handle solution is a promising candidate for flexible sensor production.
EUROPEAN POLYMER JOURNAL
(2021)
Article
Polymer Science
Huating Tu, Xiaoou Li, Xiangde Lin, Chenhong Lang, Yang Gao
Summary: This study demonstrates a dry electrode for ECG monitoring made by screen printing conductive ink on ordinary polyester fabric. The screen-printed textile electrodes exhibit good electrical and electrochemical properties and excellent ECG signal acquisition performance. Furthermore, they maintain flexibility and durability even after repeated bending and washing cycles, providing favorable support for the design of flexible and wearable electrophysiological sensing platforms.
Article
Polymer Science
Rizwan Ul Hassan, Shaheer Mohiuddin Khalil, Saeed Ahmed Khan, Shahzaib Ali, Joonkyeong Moon, Dae-Hyun Cho, Doyoung Byun
Summary: In the field of soft electronics, high-resolution and transparent structures based on various flexible materials constructed via various printing techniques are gaining attention. The electrohydrodynamic (EHD) jet printing technique allows for the fabrication of high-resolution, transparent, and flexible strain sensors. By investigating the effects of voltage, flow rate, nozzle distance, and speed, researchers have achieved a high-resolution printed mesh structure with a gauge factor significantly increased. The plasma treatment enhances adhesion and stability, making this simple printing technique suitable for high-resolution microchannels, 3D printing, and electronic devices.
Article
Nanoscience & Nanotechnology
Haihang Wang, Yuemei Cen, Xiangqiong Zeng
Summary: The 3D printed flexible tactile sensor with a graphene-PDMS microsphere structure is able to perceive microstructures with excellent mechanical properties and high sensitivity. It can accurately monitor pressure, distinguish different surfaces with microscale differences, and detect the presence of air.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Materials Science, Paper & Wood
Debasis Maity, Krishnamoorthy Rajavel, Ramasamy Thangavelu Rajendra Kumar
Summary: The study introduced a MWCNT enhanced textile wearable device for measuring human body motion changes and environmental humidity, showing potential for multifunctional sensing applications.
Article
Materials Science, Multidisciplinary
Fabrizio Marra, Serena Minutillo, Alessio Tamburrano, Maria Sabrina Sarto
Summary: Wearable systems are increasingly attractive in various application areas, with smart clothes based on fabric-integrated strain sensors showing promise but also presenting challenges. The development of smart textiles with high sensitivity, wearability, and stable response is still a challenge, and the use of graphene nanoplatelets in a water-based ink for strain sensors on synthetic fabric shows interesting potential for applications such as monitoring respiratory and heart rates.
MATERIALS & DESIGN
(2021)
Article
Engineering, Electrical & Electronic
Deepan Kumar Neethipathi, Ajay Beniwal, Adrian M. Bass, Marian Scott, Ravinder Dahiya
Summary: This study presents a flexible electrochemical sensor based on molybdenum disulfide (MoS2)-modified screen-printed carbon electrode (SPCE) for the detection of copper ions in water. The sensor shows excellent response with a limit of detection (LOD) of 5.43 μM for Cu ions in the range of 5 μM - 5 mM. Comparative studies with a conventional GCE demonstrate better linearity for the SPCE-based sensor.
IEEE SENSORS JOURNAL
(2023)
Article
Chemistry, Physical
Zhimin Yang, Yaqing Zhang, Liang Zhao, Teng Fei, Sen Liu, Tong Zhang
Summary: This study reports the synergistic effects of oxygen vacancy engineering and surface gold decoration on the detection of organophosphorus compounds. By optimizing the composition and structure of the sensing materials, high sensitivity and fast response to organophosphorus compounds are achieved. The Au nanoparticles decorated oxygen vacancy-enriched SnO2 hybrids show excellent sensing performances for the detection of dimethyl methyl phosphonate (DMMP), paving a new way for the fabrication of metal oxides-based gas sensors.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Xiuzhu Lin, Yu Bing, Fan Li, Haixia Mei, Sen Liu, Teng Fei, Hongran Zhao, Tong Zhang
Summary: This study presents a breathable and lightweight all-nanofiber piezoresistive sensor for real-time monitoring of physiological signals. The sensor is composed of three layers of electrospun nanofibers and utilizes a specific interpenetrating network of conductive and insulating nanofibers to enhance sensitivity. The sensor has excellent breathability and heat dissipation, ensuring comfort and stability during long-term wearing. It also demonstrates potential applications in spatial pressure detection.
ADVANCED MATERIALS TECHNOLOGIES
(2022)
Article
Engineering, Electrical & Electronic
Ke Wu, Xiaoya Miao, Yunlong Yu, Zhiyan Ma, Zhaonan Hou, Teng Fei, Tong Zhang
Summary: In this work, highly sensitive low-humidity sensors based on Au nanoparticles-modified sulfonate metal-organic frameworks (MOFs) were constructed, and the sensor was applied in low-humidity detection. The small Au nanoparticles enhance the hydrophilicity of the sensing material and catalyze the decomposition of water molecules, leading to a high response of the sensor in the humidity range of 5% RH-30% RH. The as-prepared sensor exhibits high sensitivity, good linearity, and long-term stability, making it suitable for the monitoring of humidity in biscuit storage environments.
IEEE SENSORS JOURNAL
(2023)
Article
Chemistry, Analytical
Zhiyan Ma, Teng Fei, Tong Zhang
Summary: Humidity is a physical quantity that measures the concentration of water vapor in the air. Humidity sensors are widely used in various fields due to their advantages of portability, easy fabrication, low cost, high sensitivity, and fast response. However, developing high-performance low humidity sensors still faces challenges due to the small amount of water molecules they can adsorb and the limitations of harsh environments. This paper reviews the research progress of low humidity sensors for nearly three decades, including the necessity of low humidity detection, measurement methods, and different types of sensors.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Chemistry, Multidisciplinary
Ke Wu, Yanyu Cui, Yaping Song, Zhiyan Ma, Juan Wang, Juan Li, Teng Fei, Tong Zhang
Summary: Inspired by the neuron system, a self-powered neuron system-like hydrogel based on gelatin, water/glycerin, and ionic liquid modified metal organic frameworks (MOFs) is prepared. The optimized hydrogel exhibits excellent properties and can detect pressure and humidity with dual-modal output without external power source.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Analytical
Zhimin Yang, Liang Zhao, Yaqing Zhang, Yunpeng Xing, Zefeng Wei, Congcong Xin, Teng Fei, Sen Liu, Tong Zhang
Summary: An isolated Cu-N5 sites engineering strategy was used to improve the sensing performances of PPy-rGO-based room-temperature DMMP sensors. The construction of Cu-N5 sites enhanced hydrogen bonding interactions and served as new active sites for DMMP adsorption. This work offers a new avenue for developing high-performance room-temperature gas sensors.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Nanoscience & Nanotechnology
Ke Wu, Xiaoya Miao, Hongran Zhao, Sen Liu, Teng Fei, Tong Zhang
Summary: In this work, ionic liquids (ILs) were encapsulated in UiO-66-NH2 nanopores to create ILs@MOF nanomaterials. The resulting ILs@MOF-based sensor exhibited good sensing performance with a small humidity hysteresis and good stability. The sensor's response value was closely related to the amount of IL encapsulated. The study also demonstrated the multifunctional applications of the optimized sensor in human breath, skin humidity, and low humidity detection.
ACS APPLIED NANO MATERIALS
(2023)
Article
Optics
Chunxue Wang, Daming Zhang, Jian Yue, Hang Lin, Xucheng Zhang, Tong Zhang, Changming Chen, Teng Fei
Summary: In this work, on-chip three-dimensional photonic integrated optical sources based on active fluorescent polymer waveguide microdisks are proposed for light display application. By doping fluorescent green and red oligomers with high-efficiency photoluminescence into epoxy crosslinking SU-8 polymer as the waveguide gain medium, microdisk-based on-chip optically pumping light sources are designed and fabricated. The approach could realize the monolithically on-chip assembled vertical and horizontal bright emitters, and has great potential for achieving 3D integrated light display application.
Article
Chemistry, Physical
Yaqing Zhang, Zhimin Yang, Liang Zhao, Yunpeng Xing, Congcong Xin, Zefeng Wei, Teng Fei, Sen Liu, Tong Zhang
Summary: Through the synergy of Pd nanoparticles and oxygen vacancies, the sensitivity of room-temperature NO2 sensors is improved by modulating the surface active sites on SnO2 modified reduced graphene oxide hybrids.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Analytical
Yunpeng Xing, Zhiming Yang, Liang Zhao, Yaqing Zhang, Zefeng Wei, Congcong Xing, Teng Fei, Sen Liu, Tong Zhang
Summary: In this study, a multisite strategy for enhancing the sensitivity of room-temperature gas sensors for the detection of DMMP was proposed. The strategy involved the introduction of N-doped carbon nanoparticles and copper ions onto the surface of rGO. The mechanism for the enhancement of DMMP sensing performances was investigated, revealing the importance of multisite construction, improvement of hydrogen bonding interactions, and decrease of conduction band potential. These findings have significant implications for the design of high-performance gas sensors and the understanding of sensing mechanisms at room temperature.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Chemistry, Multidisciplinary
Liang Zhao, Congcong Xin, Zhimin Yang, Yaqing Zhang, Yunpeng Xing, Zefeng Wei, Teng Fei, Sen Liu, Tong Zhang
Summary: In this study, Co3O4 materials with oxygen vacancies were successfully synthesized by reducing commercial Co3O4 with NaBH4. The oxygen vacancy concentrations in the Co3O4 materials were modulated by regulating the NaBH4 concentration. The Co3O4-R-5 samples with increased oxygen vacancies exhibited excellent sensing performances towards 100 ppm toluene at 190°C, including enhanced response value and fast response and recovery time. This work demonstrates the first utilization of commercial Co3O4 for toluene sensing applications and provides a universal and high-throughput preparation method for gas sensing materials using commercial metal oxides.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Yaqing Zhang, Liang Zhao, Zhimin Yang, Yunpeng Xing, Congcong Xin, Zefeng Wei, Teng Fei, Sen Liu, Tong Zhang
Summary: This study developed a noble metal decoration strategy to enhance the NO2 responses of alpha-Fe2O3/SnO2-rGO hybrids. The Pt modified alpha-Fe2O3/SnO2-rGO hybrids exhibited the highest response value attributed to their narrow band gap, small particle size, and excellent catalytic activity. The findings not only broaden the study of room-temperature gas sensors but also provide suggestions for discovering the gas sensing mechanism.
NEW JOURNAL OF CHEMISTRY
(2023)
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)
