Article
Engineering, Electrical & Electronic
S. Sridhar, Suneetha Sebastian, Ajay K. Sood, Sundarrajan Asokan
Summary: The paper reports a comprehensive study on MoS2 nanolayer coated etched Fiber Bragg Grating (eFBG) strain sensor, demonstrating high sensitivity, linearity, and potential for various applications. The coating technique enables direct control over the thickness of MoS2, leading to consistent and repeatable sensing performance.
IEEE SENSORS JOURNAL
(2021)
Article
Engineering, Manufacturing
Fatemeh Mashayekhi, Julien Bardon, Yao Koutsawa, Stephan Westermann, Frederic Addiego
Summary: This study aims to investigate the strain measurement of optical fiber sensors called fiber Bragg grating (FBG) sensors embedded in 3D printed polymeric structures and understand the relationship between the matrix-sensor effective strain transfer and interfacial properties. Printing and surface engineering methods were developed to facilitate the embedding of the FBG sensor into the PLA matrix, including the design of a channel and the use of solvent welding or chemical bonding to improve adhesion. The strain transfer was evaluated through cyclic tensile testing of the PLA specimen and comparing the digital image correlation (DIC) strain measurements on the surface with the FBG strain measurements in the core. The results showed that the strain transfer was primarily affected by the interfacial porosity volume fraction, which should be minimized during sensor embedding.
ADDITIVE MANUFACTURING
(2023)
Article
Engineering, Electrical & Electronic
Qiang Bian, Constantin Bauer, Andrea Stadler, Markus Lindner, Martin Jakobi, Wolfram Volk, Alexander W. Koch, Johannes Roths
Summary: The in-situ temperature and strain during copper casting process were monitored using regenerated fiber Bragg grating (RFBG) sensors. A fifth-order polynomial calibration function was utilized to convert the measured Bragg wavelengths into temperature values. This monitoring method provides insights into temperature distribution and strain progression inside the copper, offering new possibilities for improving casting quality and metal structure design.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Engineering, Electrical & Electronic
Flavio Esposito, Stefania Campopiano, Agostino Iadicicco
Summary: This work presents the design, fabrication, and characterization of a miniaturized metallic package for optical fiber Bragg grating (FBG) sensors. The package enhances the temperature sensitivity of the grating and eliminates cross-sensitivities to mechanical effects. It has a simple design and is made using off-the-shelf components. The packaged FBG shows improved temperature response and reduced sensitivity to longitudinal forces compared to an unpackaged FBG.
IEEE SENSORS JOURNAL
(2022)
Article
Engineering, Electrical & Electronic
Li Xiong, Yongxing Guo, Wanhuan Zhou, Min Chen, Xinglin Zhou
Summary: This paper proposed a three-axis vibration sensor based on fiber Bragg grating (FBG) with only five sensing elements, using a composite structure of cross-beam-type elastomer with multiplexed FBGs for sensing. The sensor showed low cross coupling and self temperature compensation capability. Through finite element analysis, the strain distribution and dynamic characteristics of the composite structure were studied, and vibration sensitivity tests validated its capability to measure three-axis vibration.
IEEE SENSORS JOURNAL
(2021)
Review
Chemistry, Physical
Xiaoyan Sun, Li Zeng, Youwang Hu, Ji'an Duan
Summary: Phase-shifted fiber Bragg grating (PS-FBG) is a special type of Bragg grating that has attracted extensive attention due to its narrow transmission window and excellent sensing performance. This manuscript aims to discuss the PS-FBG with special sensing characteristics and explore the influence of different inscription technologies on the sensing characteristics of PS-FBG by comparing existing inscription methods. The sensing characteristics, advantages, and disadvantages of PS-FBG with different structures are analyzed.
Article
Engineering, Electrical & Electronic
G. Woyessa, A. Theodosiou, C. Markos, K. Kalli, O. Bang
Summary: This research demonstrates the use of low loss commercially available multi-mode perfluorinated polymer optical fibers for robust and reliable fiber Bragg grating sensing. The single peak FBG reflection spectrum achieved through tapering the fiber and inscribing the FBG allows for high sensitivity strain and humidity measurements. The approach enables multi-point strain sensing at 1550 nm over long distances and combines the advantages of single mode POFs and MM POFs.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Engineering, Electrical & Electronic
Massimiliano Gabardi, Lorenzo Tozzetti, Stefano Faralli, Massimiliano Solazzi, David Benedetti, Samina Rajbhandari, Gianni Buttaro, Fabrizio Di Pasquale
Summary: Fiber Bragg grating (FBG) sensors written by femtosecond laser pulses in polyamide-coated low bending loss optical fibers are successfully embedded in carbon composite structures. These sensors are interrogated by a tunable laser and their response to temperature and strain variations is characterized. The results show good agreement with simulations, demonstrating the effectiveness of the embedding process for real-time accurate strain measurement.
IEEE SENSORS JOURNAL
(2023)
Article
Engineering, Electrical & Electronic
Haoyan Zang, Shuiquan Pang, Benliang Zhu, Hongchuan Zhang, Hai Li, Sergej Fatikow, Xianmin Zhang
Summary: This article presents a cantilever-type fiber Bragg grating (FBG)-based microforce sensor with micro-Newton resolution, which is essential for the detection of micro-forces in the micro-/nanomanipulation process. The sensor has a resolution of 7 μN force in the range of 10 mN, and it is successfully applied in the mechanical property test of the zebrafish embryo.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2023)
Review
Engineering, Electrical & Electronic
Carlo Massaroni, Martina Zaltieri, Daniela Lo Presti, Andrea Nicolo, Daniele Tosi, Emiliano Schena
Summary: Systems for cardiorespiratory monitoring show great potential in various fields including clinical settings, harsh environments, sports science, and telemonitoring. Challenges lie in developing unobtrusive and comfortable systems with high metrological performance. Recent advances in fiber optic technology, particularly in fiber Bragg grating (FBGs) sensors, offer promising solutions for cardiorespiratory monitoring.
IEEE SENSORS JOURNAL
(2021)
Article
Optics
Junying Zhang, Fengyi Chen, Ruohui Wang, Xueguang Qiao, Haibin Chen, Xiongxing Zhang
Summary: The proposed magnetic field sensor, combining fiber Bragg gratings and magnetic fluids, can simultaneously measure magnetic field and temperature, with an intensity sensitivity of -0.143 dB/Oe in the linear range of 60-110 Oe. The sensor features two resonant modes in the reflection spectrum, the first of which responds excellently to magnetic field intensity and direction, while the second mode remains stable but varies with ambient temperature.
OPTICS AND LASER TECHNOLOGY
(2021)
Article
Engineering, Electrical & Electronic
Stenio Aristilde, Marco Cesar Prado Soares, Thiago D. Cabral, Gildo Rodrigues, Eric Fujiwara, Fabiano Fruett, Cristiano M. B. Cordeiro
Summary: This article presents an optical fiber sensor based on TFBG for assessing the speed of two-phase flows, which can be interrogated in real-time according to an intensity-based, single-wavelength setup. The system is validated for samples comprised of water, oil, and air, yielding maximum relative error of 4.4% for speed measurements, whereas the sensor response can be tailored for different fluids by choosing the wavelength of the input light.
IEEE SENSORS JOURNAL
(2021)
Review
Engineering, Electrical & Electronic
Xinyao Hu, Yang Xu, Haoxi Zhang, Jianhao Xie, Dengqiang Niu, Zhong Zhao, Xingda Qu
Summary: This article provides a comprehensive survey of fiber Bragg grating (FBG) sensing gloves, focusing on sensing characteristics, functionality, performance, system design, structure, and motion tracking algorithms. The survey identifies challenges and research gaps in FBG sensing gloves, including the need for innovation in system and structure design, the development of more advanced models, and the improvement of multiplexing sensing capabilities. This survey can serve as a guide for future research in this field.
IEEE SENSORS JOURNAL
(2023)
Article
Engineering, Electrical & Electronic
Davide Ferraro, Giacomo D'Alesio, Domenico Camboni, Ciro Zinno, Leone Costi, Max Haberbusch, Philipp Aigner, Martin Maw, Thomas Schloglhofer, Ewald Unger, Andrea Aliperta, Fabio Bernini, Valentina Casieri, Domiziana Terlizzi, Guido Giudetti, Jacopo Carpaneto, Gianni Pedrizzetti, Silvestro Micera, Vincenzo Lionetti, Francesco Moscato, Luca Massari, Calogero Maria Oddo
Summary: An innovative implantable Fiber Bragg Grating-based soft sensor was designed to sense mechanical cardiac activity, providing continuous and reliable cardiac function monitoring. The sensor's capability to track ventricular beats in real-time was confirmed through testing on animal hearts, with errors consistently lower than 1 Bpm. The study also proposed two causal algorithms for detecting beats and discriminating artifacts from sensor data, achieving an error of 2.7 +/- 0.7 beats per minute in tracking heart rate.
IEEE SENSORS JOURNAL
(2021)
Review
Optics
Zhiyong Zhao, Yunli Dang, Ming Tang
Summary: This paper reviews the research progress on MCF-based fiber grating sensors. It introduces various types of fiber grating sensors based on MCF, discusses their working principles, and summarizes the applications of MCF grating sensors. Finally, the challenges and prospects of MCF grating for sensing applications are presented.
Article
Optics
Mikel Sagues, Enrique Pineiro, Enis Cerri, Aldo Minardo, Avishay Eyal, Alayn Loayssa
Summary: The paper presents a two-wavelength OTDR sensor using perfect periodic correlation phase codes to enhance measurement performance. While this technique increases measurement range, it also introduces relative measurement noise, which is addressed through optical pulse compression and other methods. Results show improved spatial resolution, strain sensitivity, and measurement range compared to conventional methods.
Article
Engineering, Electrical & Electronic
E. Catalano, R. Vallifuoco, Luigi Zeni, Aldo Minardo
Summary: This paper proposes and demonstrates a distributed liquid level sensor based on high-resolution Brillouin Optical Frequency-Domain Analysis and an actively heated optical fiber, discussing both its capabilities and limitations. Experimental results show that the sensor can measure liquid level positions with a 5 mm level resolution, but also reveal the negative impact of spontaneous Brillouin scattering on measurement accuracy.
IEEE SENSORS JOURNAL
(2022)
Article
Engineering, Electrical & Electronic
Aldo Minardo, Luigi Zeni, Romeo Bernini, Ester Catalano, Raffaele Vallifuoco
Summary: This paper demonstrates quasi-distributed refractive index sensing using multiple tapers in optical fibers, showing the variation of the Brillouin frequency shift with the diameter of the tapered fiber and the outer refractive index in an optical fiber taper. It also discusses the possibility of multi-point refractive index sensing along the same fiber.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Chemistry, Analytical
Aldo Minardo, Ester Catalano, Agnese Coscetta, Giovanni Zeni, Caterina Di Maio, Roberto Vassallo, Luciano Picarelli, Roberto Coviello, Giuseppe Macchia, Luigi Zeni
Summary: This paper presents the results of monitoring tunnel deformations using a distributed optical fiber strain sensor based on stimulated Brillouin scattering. The study found that the deformation profiles of the tunnel are characterized by strain peaks at structural joints, and there is an increase in the time rate of fiber deformation during periods of accelerated landslide movements in the surrounding area.
Article
Automation & Control Systems
Shenyu Liu, Antonio Russo, Daniel Liberzon, Alberto Cavallo
Summary: This article studies the integral-input-to-state stability (iISS) of nonlinear switched systems with jumps, demonstrating examples where iISS is not always preserved under slow switching, and presenting sufficient conditions for the preservation of iISS under slow switching.
IEEE TRANSACTIONS ON AUTOMATIC CONTROL
(2022)
Article
Optics
E. Catalano, R. Vallifuoco, R. Bernini, L. Zeni, A. Minardo
Summary: This paper demonstrates the use of non-adiabatic tapers in optical fibers for refractive index sensing based on Brillouin scattering. By exciting higher order optical modes, a multipeaked Brillouin gain spectrum is achieved, resulting in an enhanced sensitivity to refractive index changes. The spectral difference between two peaks also allows for a temperature-independent measurement of the external refractive index.
Article
Energy & Fuels
Antonio Russo, Alberto Cavallo
Summary: The need for greener and cleaner aviation has led to the adoption of more electric systems on aircraft. Controlling bidirectional power converters is a major challenge in these systems. This study presents stability analysis and control for a buck-boost converter used in aeronautic applications. The stability of the converter is proven using Lyapunov's stability theorem, and a novel control design based on second order sliding mode control and uniting control is proposed to overcome the difficulties caused by the nonlinear input gain function.
Article
Chemistry, Analytical
Rizwan Zahoor, Ester Catalano, Raffaele Vallifuoco, Luigi Zeni, Aldo Minardo
Summary: In this paper, a damage detection technique based on automatic classification of Lamb wave signals is proposed and demonstrated. Lamb waves are excited in an aluminum plate using a piezoelectric transducer, and the response is detected through a high-resolution phase-sensitive optical time-domain reflectometer (phi-OTDR). The proposed method uses support vector machine (SVM) classifiers trained with experimental data to accurately determine the presence and location of a small perturbation induced on the plate. The results show that this method effectively utilizes the multipoint sensing nature of phi-OTDR technology for accurate damage detection and localization.
Article
Engineering, Electrical & Electronic
Francesco Arcadio, Ricardo Oliveira, Domenico Del Prete, Aldo Minardo, Luigi Zeni, Lucia Bilro, Nunzio Cennamo, Rogerio Nunes Nogueira
Summary: A novel surface plasmon resonance (SPR) sensor was designed, realized, and investigated in this work. The sensor utilized a D-shaped plastic optical fiber shell (POFS) with a gold nanofilm coating to create a plasmonic-sensitive region. By injecting the solution under test into the microchannel of the sensor using a peristaltic pump, the need for microfluidic systems typically used in SPR configuration was eliminated. Experimental results demonstrated the sensor's high sensitivity and resolution, indicating its potential for biochemical sensing applications.
IEEE SENSORS JOURNAL
(2023)
Review
Chemistry, Analytical
Aldo Minardo, Romeo Bernini, Gaia Maria Berruti, Giovanni Breglio, Francesco Antonio Bruno, Salvatore Buontempo, Stefania Campopiano, Ester Catalano, Marco Consales, Agnese Coscetta, Andrea Cusano, Maria Alessandra Cutolo, Pasquale Di Palma, Flavio Esposito, Francesco Fienga, Michele Giordano, Antonio Iele, Agostino Iadicicco, Andrea Irace, Mohammed Janneh, Armando Laudati, Marco Leone, Luca Maresca, Vincenzo Romano Marrazzo, Marco Pisco, Giuseppe Quero, Michele Riccio, Anubhav Srivastava, Patrizio Vaiano, Luigi Zeni, Antonello Cutolo
Summary: Our research group, made up of researchers from various universities in Campania, Italy, has been dedicated to studying photonic sensors for safety and security applications in healthcare, industry, and the environment for the past twenty years. This paper is the first in a series of three and it presents the main concepts of the technologies used in our photonic sensors and reviews our key findings in innovative applications for infrastructure and transportation monitoring.
Review
Chemistry, Analytical
Antonello Cutolo, Romeo Bernini, Gaia Maria Berruti, Giovanni Breglio, Francesco Antonio Bruno, Salvatore Buontempo, Ester Catalano, Marco Consales, Agnese Coscetta, Andrea Cusano, Maria Alessandra Cutolo, Pasquale Di Palma, Flavio Esposito, Francesco Fienga, Michele Giordano, Antonio Iele, Agostino Iadicicco, Andrea Irace, Mohammed Janneh, Armando Laudati, Marco Leone, Luca Maresca, Vincenzo Romano Marrazzo, Aldo Minardo, Marco Pisco, Giuseppe Quero, Michele Riccio, Anubhav Srivastava, Patrizio Vaiano, Luigi Zeni, Stefania Campopiano
Summary: In this paper, the employability of photonics technology in aerospace and submarine applications is explored. The main focus is on the use of optical fiber sensors for safety and security purposes. Recent in-field applications of optical fiber sensors in aircraft monitoring and underwater marine applications are presented and discussed.
Review
Chemistry, Analytical
Giovanni Breglio, Romeo Bernini, Gaia Maria Berruti, Francesco Antonio Bruno, Salvatore Buontempo, Stefania Campopiano, Ester Catalano, Marco Consales, Agnese Coscetta, Antonello Cutolo, Maria Alessandra Cutolo, Pasquale Di Palma, Flavio Esposito, Francesco Fienga, Michele Giordano, Antonio Iele, Agostino Iadicicco, Andrea Irace, Mohammed Janneh, Armando Laudati, Marco Leone, Luca Maresca, Vincenzo Romano Marrazzo, Aldo Minardo, Marco Pisco, Giuseppe Quero, Michele Riccio, Anubhav Srivastava, Patrizio Vaiano, Luigi Zeni, Andrea Cusano
Summary: This article focuses on environmental monitoring using photonic technologies, including high precision agriculture, soil water content measurement, landslide early warning, new generation seismic sensors, and optical fiber sensors for radiation environments.
Article
Instruments & Instrumentation
Alessandro De Luca, Donato Perfetto, Antonio Polverino, Aldo Minardo, Francesco Caputo
Summary: This study presents a new automatic diagnosis framework based on the propagation of ultrasonic guided waves (UGW) for fault detection and localization in thin-walled structures. A fully automated damage identification algorithm is developed using numerical dataset obtained by finite element simulations and validated experimentally. The algorithm is capable of detecting damages located inside and outside the sensors network, as well as close to the panel edges.
SMART MATERIALS AND STRUCTURES
(2023)
Article
Engineering, Electrical & Electronic
Francesco Arcadio, Domenico Del Prete, Aldo Minardo, Chiara Marzano, Luigi Zeni, Nunzio Cennamo
Summary: Two sensor configurations were developed and tested to measure micro/nano-liquid volumes. The proposed sensor chips, based on polymeric light diffusing fibers, demonstrated volume resolutions that were about seven times higher compared to a similar configuration without modifications. The sensors utilized changes in the mode profile of light to detect variations in resonance wavelength caused by micro/nano-liquid volumes deposited on sensitive patches.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2023)
Article
Optics
E. Catalano, R. Vallifuoco, R. Bernini, L. Zeni, A. Minardo
Summary: In this manuscript, it is demonstrated that an array of tapers formed along a single-mode optical fiber can be used for localized, dynamic strain sensing position with a Brillouin Optical Frequency-Domain Analysis (BOFDA) sensor. The periodic modulation of the Brillouin frequency shift by the multi-taper appears as a spectral resonance in the baseband transfer function acquired by the BOFDA sensor. Any strain acting along the multi-taper affects the magnitude of this resonance, enabling dynamic strain measurements at that position. The fabrication of multi-taper arrays with different periods allows for the realization of more dynamic sensing positions along the same fiber. Measurements were performed on two vibrating cantilevers using two multi-taper arrays with lengths of 72 mm and 75 mm, respectively, at a sampling rate of 46 Hz.
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)
