Article
Engineering, Electrical & Electronic
Guodong Wang, Jiajia Yan, Xiaofeng Yang, Xinlin Qing
Summary: A resistive pressure sensor based on a composite conductive layer is developed in this paper, using PDMS as the matrix and SAP(+) as the conductive filler. The improved sensor shows significant improvements in sensitivity, response time, and stability.
IEEE SENSORS JOURNAL
(2022)
Article
Engineering, Electrical & Electronic
Rishabh B. Mishra, Fhad Al-Modaf, Wedyan Babatain, Aftab M. Hussain, Nazek El-Atab
Summary: Structural engineering is crucial in designing electromechanical systems. This study focuses on the design optimization, finite element analysis, and experimental evaluation of capacitive pressure sensors. The sensors were characterized using air pressure sensing applications, and the combination of square and circular diaphragms with two trapezoidal cantilevers exhibited the highest sensitivity.
IEEE SENSORS JOURNAL
(2022)
Article
Materials Science, Composites
Thomas Searle, Vitor Sencadas, Jonathan Greaves, Gursel Alici
Summary: This work demonstrates the synthesis of multi-wall carbon nanotube-silicone nanocomposites with dynamic metal-ligand self-healing chemistry, providing skin-like mechanical elasticity for biomedical devices. The composites achieve tunability in mechanical stiffness and conductivity while maintaining high flexibility and repairability.
COMPOSITES SCIENCE AND TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Lakhvir Singh, Kamalesh Tripathy, Mitradip Bhattacharjee
Summary: This study presents a flexible PDMS-based pressure sensor with hemispherical microstructures, achieving high sensitivity and operation range. Experiments and simulations show that decreasing the substrate thickness and adding porosity can further improve the sensor performance.
ADVANCED ENGINEERING MATERIALS
(2022)
Article
Engineering, Electrical & Electronic
Vinod Belwanshi, Sebin Philip, Anita Topkar
Summary: This study designed and fabricated three types of piezoresistive pressure sensors using different process technologies. The sensors were tested under elevated temperature and pressure conditions, and it was found that the sensors with oxide isolated polysilicon piezoresistors demonstrated the best performance.
IEEE SENSORS JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Jian Li, Ning Li, Yuanyuan Zheng, Dongyang Lou, Yue Jiang, Jiaxi Jiang, Qunhui Xu, Jing Yang, Yujing Sun, Chuxuan Pan, Jianlan Wang, Zhengchun Peng, Zhikun Zheng, Wei Liu
Summary: A facile interfacial locking strategy has been developed to fabricate metal aerogel-based pressure sensors with excellent sensitivity and prominent stability. The sensors have high sensitivity, fast response time, and outstanding durability, making them suitable for real-time monitoring of HMI activities.
Article
Materials Science, Multidisciplinary
Wooseok Kim, Doyoung Kim, Jihwan Kim, Sang Uk Park, Hee Kyu Lee, Janghoon Joo, Se Gi Lee, Jeong Woo Chae, Jeonghyun Kim, Seungyong Han, Hyoung Won Baac, Sang Min Won
Summary: This article introduces a pressure sensor made on a mechanically deformable substrate, which is widely used in health monitoring systems, tactile sensors, and human-machine interfaces. By optimizing the geometrical configuration, the sensor can effectively reduce the mechanical distortion caused by non-pressure related stimuli, enabling independent perception of normal force.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Article
Nanoscience & Nanotechnology
Goretti Arias-Ferreiro, Aurora Lasagabaster-Latorre, Ana Ares-Pernas, M. Sonia Dopico-Garcia, N. Pereira, P. Costa, S. Lanceros-Mendez, Maria-Jose Abad
Summary: Tunable UV-curable polymeric composites filled with PANI/MWCNT were prepared using Digital Light Processing and optimized for suitable 3D printing. The composites exhibited enhanced mechanical and electromechanical properties, making them suitable for pressure sensing applications.
ADVANCED ELECTRONIC MATERIALS
(2022)
Article
Chemistry, Analytical
Tingting Yu, Yebo Tao, Yali Wu, Dongguang Zhang, Jiayi Yang, Gang Ge
Summary: Flexible piezoresistive sensors (FPSs) are widely used in motion detection, wearable electronic devices, and electronic skins due to their compact structure, convenient signal acquisition, and fast dynamic response. However, a single material-based FPS cannot achieve both high sensitivity and a wide measurement range. To address this issue, a heterogeneous multi-material flexible piezoresistive sensor (HMFPS) with high sensitivity and a wide measurement range is proposed. The HMFPS utilizes a graphene foam as the sensing layer for high sensitivity and a PDMS layer as the supporting layer for a large measurement range. The use of heterogeneous multi-material proves to be an effective approach to produce flexible sensors with high performance. The HMFPS-10 demonstrates a sensitivity of 0.695 kPa(-1), a measurement range of 0-14,122 kPa, fast response/recovery (83 ms and 166 ms), and excellent stability (2000 cycles). The potential application of the HMFPS-10 in human motion monitoring is also demonstrated.
Article
Automation & Control Systems
Jing Li, Tianyu Wu, Huan Jiang, Yanyu Chen, Qibiao Yang
Summary: A facile laser-engraving method was proposed to fabricate a flexible multiwalled-carbon-nanotube/poly(dimethylsiloxane) composite-based piezoresistive sensor with hierarchical microstructures, showing high sensitivity and a wide pressure sensing range. The sensor can monitor subtle pressure changes and has promising applications in wearable electronics.
ADVANCED INTELLIGENT SYSTEMS
(2021)
Article
Engineering, Electrical & Electronic
Chengwu Gao, Xuanqing Hua, Dacheng Zhang
Summary: In this article, a rapid thermal process is proposed to manufacture piezoresistance for improved performance of piezoresistive devices. An absolute piezoresistive pressure sensor is prepared by anodic bonding between a silicon film and glass with a cavity, resulting in a compact size of 1.0 x 1.0 x 0.513 mm. The piezoresistance arrangement is optimized using the finite element method, and the feasibility of Ti as an oxygen absorber in the anodic bonding process is verified through diaphragm deformation measurement. The pressure sensor prepared using the rapid thermal annealing (RTP) process exhibits an output voltage of 91.6 mV, nonlinearity of 0.14% FSO, temperature coefficient of resistance (TCR) of 571 ppm/degrees C, and temperature coefficient of sensitivity (TCS) of -1676 ppm/degrees C within the pressure range of 0-200 kPa. Compared to the pressure sensor prepared by the common piezoresistive process, the designed sensor shows a reduced TCR by 73% and TCS by 24%, while providing high output voltage, low TCR and TCS, and a small size.
IEEE SENSORS JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Guohong Hu, Fengli Huang, Chengli Tang, Jinmei Gu, Zhiheng Yu, Yun Zhao
Summary: This study explored the application of microstructured dielectric layers printed by aerosol printing in optimizing the performance of flexible pressure sensors, showing that it could replace traditional inverted mold technology. The designed flexible pressure sensors demonstrated good performance in various tests.
Article
Nanoscience & Nanotechnology
Wing Chung Liu, Andrew A. R. Watt
Summary: The study utilizes solvodynamic printing to fabricate highly conductive piezoresistive composite films with tunable performance for low-pressure sensing, achieving low detection limit, fast response time, and high sensitivity. The film is further successfully applied as a pulse-monitoring device.
ACS APPLIED NANO MATERIALS
(2021)
Article
Chemistry, Analytical
Zhong Yun, Kuibing Li, Hao Jiang, Xiaoyan Tang
Summary: A composite flexible sensor was designed to effectively detect pressure and deformation signals of a ventricular assist device, showing improved performance compared to traditional sensors. Interference issues were solved through optimized processes.
Article
Chemistry, Multidisciplinary
Xiujuan Wang, Hui Li, Tanyu Wang, Xin Niu, Yu Wang, Siyi Xu, Yaming Jiang, Li Chen, Hao Liu
Summary: Flexible wearable pressure sensors have significant potential in various applications, but developing sensors with high sensitivity, fast response, and reliable stability through a simple fabrication process remains a challenge. In this study, a simple and efficient method was developed to fabricate lightweight three-dimensional piezoresistive sensing materials, and the assembled pressure sensor demonstrated high sensitivity, wide working range, fast response time, and reliable repeatability.