Article
Materials Science, Composites
Hyung Doh Roh, Biplab K. Deka, Hyung Wook Park, Young-Bin Park
Summary: A novel multifunctional composite has been developed, combining the functions of a supercapacitor and a structural health monitoring sensor. It offers advantages of lightweightness, high energy storage, self-sensing, and easy engineering design, making it applicable in various fields such as automobiles, aerospace, civil infrastructure, and industrial plants.
COMPOSITES SCIENCE AND TECHNOLOGY
(2021)
Article
Engineering, Multidisciplinary
Tommaso Maria Brugo, Emanuele Maccaferri, Davide Cocchi, Laura Mazzocchetti, Loris Giorgini, Davide Fabiani, Andrea Zucchelli
Summary: The integration of a nanostructured piezoelectric sensor with a composite laminate has been achieved to enable self-sensing capability for impact detection across the entire surface. This self-sensing laminate was tested for linearity and spatial uniformity using an instrumented drop-weight tower.
COMPOSITES PART B-ENGINEERING
(2021)
Article
Materials Science, Composites
Konstantinos Myronidis, Michael Thielke, Maciej Kopec, Michele Meo, Fulvio Pinto
Summary: This study presents a novel smart layer for reducing impact damage on carbon fibre reinforced polymer laminates. The smart layer has a frequency-dependant reversible network structure, which can autonomously stiffen and modify the energy distribution in response to external stimulus. Experimental results show that the smart layer can significantly reduce internal damage and provide a low-cost protection solution.
COMPOSITES SCIENCE AND TECHNOLOGY
(2022)
Article
Construction & Building Technology
Jinsheng Han, Jinlong Pan, Jingming Cai
Summary: This paper investigates the application of self-sensing high ductility cementitious composite (HDCC) in structural health monitoring. A carbon fiber reinforced HDCC with the addition of nano-carbon black and carbon fiber was designed and tested under compression and tension conditions. The experimental results analyze the sensing properties and piezoresistive effect of the proposed HDCC. The findings suggest that the HDCC has high ultimate tensile strain and good electrical sensitivity and signal-to-noise ratio when the water-binder ratio is 0.3.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Materials Science, Composites
N. Forintos, T. Sarkadi, T. Czigany
Summary: Electric measurements of carbon fiber-reinforced composites can be used to detect and measure overload conditions, with the resistance of the carbon fiber increasing until it breaks; cyclic testing shows that overload exceeding reversible deformation can be detected by examining the first derivative of the resistance change.
COMPOSITES COMMUNICATIONS
(2021)
Article
Mechanics
Dehui Wu, Wenxiong Chen, Jiaxin Yang, Fan Yang
Summary: In this paper, a self-resonance ECT method for noncontact detection of CFRP at a low-frequency with a relatively high signal-to-noise ratio was proposed. The system developed in this study showed similar detection effect at 500 kHz compared to the traditional ECT system at 10 MHz, indicating that 500 kHz is sufficient for providing good detection results for CFRP samples. This research contributes valuable guidance for the application of low-frequency ECT method in CFRP.
COMPOSITE STRUCTURES
(2021)
Review
Chemistry, Multidisciplinary
Fei Teng, Jianlin Luo, Yibo Gao, Xiaoyang Zhou, Jigang Zhang, Song Gao, Shengwei Sun
Summary: CNT-modified cement-based smart material (CNTCS) has excellent electromechanical properties and can be developed as a static/dynamic intrinsic sensor for Structural Health Monitoring (SHM) after effective packaging and calibration. The dispersion methods and influence laws of CNT in the water/cement matrix were summarized, and the full-frequency domain sensing mechanism of CNTCS was analyzed. The practicality of applying CNTCS as an SHM static/dynamic intrinsic sensor was further investigated.
NANOTECHNOLOGY REVIEWS
(2021)
Article
Materials Science, Multidisciplinary
In Yong Lee, Juhyeong Jang, Young-Bin Park
Summary: In this study, an advanced structural health monitoring (SHM) method using a non-destructive self-sensing approach was proposed for large-sized carbon fiber-reinforced plastic (CFRP). The severity and localization of damage were investigated using cyclic point bending tests and convolutional neural network (CNN) architectures. The proposed SHM methodology was verified by analyzing unseen damage in CFRPs. By reducing the number of electrodes, this study addressed the limitations of previous self-sensing methods and designed an efficient SHM method with high accuracy.
MATERIALS & DESIGN
(2022)
Article
Chemistry, Physical
Johanna Xu, Zeyang Geng, Marcus Johansen, David Carlstedt, Shanghong Duan, Torbjorn Thiringer, Fang Liu, Leif E. Asp
Summary: Multifunctional materials offer lightweight and slender structural solutions for various applications. Using construction materials that can act as batteries and store electrical energy can contribute to highly energy efficient vehicles and aircraft in transportation.
Article
Materials Science, Characterization & Testing
Jung-Ting Tsai, Joshua S. Dustin, Jan-Anders Mansson
Summary: The study compared the strain measurement capabilities of a Distributed Fiber Optical Sensor (DOS) with traditional Strain Gages (SG) and Digital Image Correlation (DIC) on a multi-directional continuous fiber composite laminate coupon. Results showed that the DOS accurately measured strains in concentrated areas and in the presence of a strain gradient, with good agreement between measured and theoretical results. The findings suggest that DOS is a robust strain acquisition option that overcomes some limitations associated with traditional foil SG and DIC methods.
Article
Mechanics
Raj Kumar Pittala, Goteti Dhanaraju, B. Satish Ben, Avinash Ben
Summary: The structural integrity of micro-cracked CFRP composite structures can be re-established by incorporating a self-healing system based on microcapsules. The addition of microcapsules reduces the flexural strength of the composite, but the healing efficiency can be improved by adjusting the concentration of capsules, healing temperature, and pressure. Microstructural investigation reveals crack path deflection, crack pinning, and capsules rupture mechanisms in the fracture surface of the capsule-reinforced composite.
COMPOSITE STRUCTURES
(2022)
Article
Construction & Building Technology
Christos Vlachakis, Xueying Wang, Abir Al-Tabbaa
Summary: This paper examines the self-sensing performance of filler-free metakaolin geopolymer binders and coatings under repeated compression. The addition of polypropylene fibers addresses shrinkage issues and improves the suitability for field applications. The sensing performance of metakaolin geopolymers is evaluated under various loading patterns, and their strain sensing performance is characterized. The geopolymer sensors demonstrate high repeatability and stability under different loading regimes, with gauge factors ranging from 18.3 to 38.3 for binders and 20.7 to 43.2 for coatings. Overall, these materials show potential as a viable means of monitoring civil infrastructure under repeated compression.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Polymer Science
Cuifen Zhang, Shiqiang Song, Mei Liu, Jincheng Wang, Zijin Liu, Shuhua Zhang, Weizhen Li, Yong Zhang
Summary: In this study, a highly elastic sensor was fabricated using silicone rubber based on conductive polymer composites containing carbon nanotubes and reduced graphene oxide. The sensor's performance was significantly influenced by the porosity and filler conductive networks. The sensor exhibited high conductivity, strain sensitivity, pressure sensitivity, linearity, response time, and repeatability, making it suitable for detecting physiological activities, human body movements, pressure distribution, and temperature identification.
EUROPEAN POLYMER JOURNAL
(2022)
Article
Construction & Building Technology
Maryam Monazami, Ashutosh Sharma, Rishi Gupta
Summary: The installation of concrete pavements at bus stops can improve resistance to deterioration, with innovative materials like CFRC showing superior performance compared to normal concrete. Real-time monitoring and various tests showed that CFRC bus pads have fewer cracks and better durability, leading to increased service life and lower electrical resistivity compared to traditional concrete bus pads.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2022)
Article
Chemistry, Physical
G. M. Koo, T. N. Tallman
Summary: The study explores the AC conductivity-strain relations for polymeric carbon nanofiber composites, finding that Jonscher's power law accurately describes the AC conductivity as a function of both normal and shear strain. The material exhibits frequency-dependent piezoresistive switching behavior, with positive piezoresistivity at low frequencies and negative piezoresistivity at higher frequencies. This novel switching behavior is attributed to inter-CNF AC transport behaving like a parallel resistor-capacitor arrangement, offering exciting possibilities for frequency-selective piezoresistive behavior in next-generation carbon nanofiller-based sensors.
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)
