Article
Engineering, Electrical & Electronic
Xiaofeng Yang, Si Chen, Yijun Shi, Zhiwei Fu, Bin Zhou
Summary: A highly flexible, sensitive and capacitive pressure sensor based on a porous ionic membrane has been developed, with improved sensitivity and detectable pressure range by enhancing the deformability of the elastomer dielectric layer with micro-pores. The sensor provides high sensitivity and rapid dynamic responses, is insensitive to bending deformation, stable in low temperature range, and capable of measuring spatial pressure distribution and magnitude.
SENSORS AND ACTUATORS A-PHYSICAL
(2021)
Article
Engineering, Electrical & Electronic
Charn Loong Ng, Mamun Bin Ibne Reaz, Maria Liz Crespo, Andres Cicuttin, Mohd Ibrahim Bin Shapiai, Sawal Hamid Bin Md Ali, Noorfazila Binti Kamal, Muhammad Enamul Hoque Chowdhury
Summary: Musculoskeletal diseases have a negative impact on personal health and the global economy. Wearable sensing technology, specifically the capacitive EMG biomedical sensor introduced in this research, can improve the efficiency of public healthcare strategies to combat these diseases. The sensor's flexibility, miniaturization, and durability make it suitable for standalone adhesive use or integration into wearable applications.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2023)
Article
Materials Science, Multidisciplinary
Melih Ogeday Cicek, Doga Doganay, Mete Batuhan Durukan, Mustafa Caner Gorur, Husnu Emrah Unalan
Summary: This study demonstrates a low-cost, lightweight, parallel plate capacitive sensor with a unique seamless monolithic design, which can overcome the issues of traditional capacitive sensors and shows high sensitivity, fast response/recovery time, low-pressure sensing ability, high mechanical and washing stabilities.
ADVANCED MATERIALS TECHNOLOGIES
(2021)
Review
Chemistry, Multidisciplinary
Min Su, Pei Li, Xueqin Liu, Dapeng Wei, Jun Yang
Summary: This paper provides a comprehensive review of recent developments in textile-based flexible capacitive pressure sensors, including sandwich structures, yarn structures, and in-plane structures. It discusses the influences of different device structures on performance and summarizes the applications of textile-based sensors in human wearable devices, robotic sensing, and human-machine interaction. The paper also highlights evolutionary trends, future directions, and challenges.
Article
Engineering, Electrical & Electronic
Xueyang Liu, Chuanliang Li, Zhentao Wang, Yifeng Li, Jianqiu Huang, Huiyang Yu
Summary: This paper presents flexible pressure sensors based on 3D printing technology, with a sandwich structure design and a hollow prism structure pressure sensitive layer. Experimental synthesis of three kinds of flexible composite dielectrics demonstrated that the sensor with PDMS doping both BaTiO3 and CNTs showed the highest sensitivity, 1.3 times that of the reference sensor, indicating that fabricating composite dielectrics in this way has the potential to improve device performance.
IEEE SENSORS JOURNAL
(2021)
Article
Engineering, Electrical & Electronic
Ashis Tripathy, Priyaranjan Sharma, Sumit Pramanik, Filipe Samuel Silva, Noor Azuan Bin Abu Osman
Summary: In this study, a flexible capacitive humidity sensor based on Armalcolite-PDMS was designed, showing fast response and recovery times, as well as ultra-low hysteresis. The developed sensor demonstrated long-term stability after being recorded for 30 days. The sensing mechanism was investigated through impedance plots in different humidity environments.
IEEE SENSORS JOURNAL
(2021)
Article
Materials Science, Multidisciplinary
Jingxia Huang, Xiaobin Tang, Feng Wang, Zehuan Wang, Yujuan Niu, Hong Wang
Summary: In this study, a capacitive pressure sensor based on PVDF/rGO multilayer films with multi-hierarchical microstructures is designed and constructed to improve linearity. By optimizing the microstructure and roughness, the sensor achieves excellent performance in terms of sensitivity, limit of detection, response time, and stability.
ADVANCED ENGINEERING MATERIALS
(2022)
Article
Physics, Applied
Yucheng Chen, Peng Zhang, Yuxia Li, Kun Zhang, Jinpeng Su, Liangsong Huang
Summary: A flexible capacitive pressure sensor based on micro-structured electrode has been developed, showing high sensitivity and good stability, suitable for applications in healthcare and smart services. By optimizing the size of the electrode microstructure, the sensor can achieve a sensitivity of 1.3 kPa(-1) in different pressure ranges. Assembled in arrays, the sensor can be used to monitor arterial pulse waves and breathing, proving its applicability in complex scenarios.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Automation & Control Systems
Diogo Fonseca, Mohammad Safeea, Pedro Neto
Summary: This article presents a novel mechanically flexible force and proximity hybrid sensor that is inexpensive and easy to apply on complex-shaped robot structures. The sensor's versatility, flexibility, thinness, accuracy, and repeatability were demonstrated through experimental trials. It was successfully applied in hand-guiding a robot and human-robot collision avoidance.
IEEE TRANSACTIONS ON INDUSTRIAL INFORMATICS
(2023)
Article
Engineering, Electrical & Electronic
Ruiqing Li, Qun Zhou, Yin Bi, Shaojie Cao, Xue Xia, Aolin Yang, Siming Li, Xueliang Xiao
Summary: This paper reviews a large number of research outputs on sensitivity improvement of flexible capacitive pressure sensors and discusses methods and trends for enhancing the sensitivity of pressure sensors.
SENSORS AND ACTUATORS A-PHYSICAL
(2021)
Article
Materials Science, Multidisciplinary
Dongguang Zhang, Xinxin Wang, Yali Wu, Honglie Song, Zhen Ma, Xunying Zhang, Xiaofeng Yang, Ruizhe Xing, Yang Li, Jiayi Yang
Summary: Flexible capacitive stress sensors are important for various applications, but the invariance of dielectric materials' elastic modulus can pose challenges to sensitivity and measurement limits. To address this issue, a sensor based on passive particle jamming variable stiffness material is proposed, which can achieve high sensitivity and large measurement range.
ADVANCED MATERIALS TECHNOLOGIES
(2021)
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
Robotics
Jiajie Guo, Chuxuan Guo, Jialei Zhou, Kui Duan, Qining Wang
Summary: This article presents a method to capture mechanical deformations of muscle contraction using wearable flexible sensors. The method is validated through model calibration and experimental testing, and it demonstrates high accuracy and stability in measuring muscle strain. The sensing model is calibrated using ultrasound medical imaging, and the effectiveness and accuracy of the method are confirmed through gait pattern identification experiments. This non-invasive measurement method has great potential for muscle deformation monitoring and motion pattern recognition.
Article
Engineering, Electrical & Electronic
Dau Thi Ngoc Nga, Giorgio Mattana, Vu Thi Thu, Ronan Roussel, Benoit Piro
Summary: In this study, a conformable capacitive pressure sensor was fabricated by inkjet-printing silver electrodes onto polyimide foils. The sensor was used in a commercial dressing to reduce ischemia risk and monitor ankle movement and foot pressure.
SENSORS AND ACTUATORS A-PHYSICAL
(2022)
Article
Materials Science, Multidisciplinary
Zichen Song, Zengwen Liu, Le Zhao, Chunlei Chang, Wenxing An, Haoren Zheng, Shihui Yu
Summary: This study proposes a low-cost method for producing a high-performance biodegradable flexible capacitive sensor. The sensor exhibits excellent sensing performance and shows good degradability under natural conditions. Due to its outstanding performance, the sensor is expected to be applied in areas such as human health monitoring, motion detection, and disease diagnosis.
ORGANIC ELECTRONICS
(2022)
Article
Pharmacology & Pharmacy
Ines Nikolic, Mitar Simic, Ivana Pantelic, Goran Stojanovic, Jelena Antic Stankovic, Bojan Markovic, Snezana Savic
Summary: Various approaches have been proposed for improving dermal drug delivery, such as chemical penetration enhancers and electrical current methods like iontophoresis. In this study, curcumin-loaded nanoemulsions with and without monoterpenes as penetration enhancers, as well as an adhesive dermal delivery system based on iontophoresis, were designed and evaluated. The results showed that iontophoresis was equally efficient as other methods in terms of curcumin penetration through superficial skin layers. Further improvement of iontophoresis as a mobile adhesive system would be a practical contribution in the field of dermal drug application.
Article
Chemistry, Analytical
Mitar Simic, Adrian K. Stavrakis, Ankita Sinha, Velibor Premcevski, Branko Markoski, Goran M. Stojanovic
Summary: The study aims to develop a portable and lightweight handheld respiration monitoring device for disease recognition. The device utilizes a textile capacitive sensor and readout electronics for monitoring, powered by a smartphone or PC. The embroidered sensor has been tested and proven to provide stable and reliable respiration monitoring.
Article
Chemistry, Physical
Saima Qureshi, Lazar Milic, Bojan Petrovic, Marija Vejin, Sanja Kojic, Stefan Jaric, Goran Stojanovic
Summary: This study aimed to investigate appropriate recommendations for the usage of artificial saliva and mouthwash. Measurements of contact angle, pH, and conductivity were conducted on different dental materials. The results showed nonlinear and nonuniform behavior for all liquids and substrates. Significant differences were found among the tested liquids on all substrates, and a moderate positive correlation was observed between pH and conductivity.
Article
Computer Science, Information Systems
Kasyap Suresh, Varun Jeoti, Micheal Drieberg, Socheatra Soeung, Asif Iqbal, Goran M. Stojanovic, Sohail Sarang
Summary: This article proposes a system that uses passive sensor tags and a reader infrastructure based on a cellular code-reuse scheme to obtain sensed data. The sensor tags are designed to be orthogonal for simultaneous detection, and the reader-SAW sensor-tags communication range is enhanced through the resonant loading of interdigital transducer reflectors.
IEEE INTERNET OF THINGS JOURNAL
(2022)
Review
Chemistry, Analytical
Selvakumar Guruswamy, Milica Pojic, Jayashree Subramanian, Jasna Mastilovic, Sohail Sarang, Arumugam Subbanagounder, Goran Stojanovic, Varun Jeoti
Summary: The rapid growth of world population has increased the demand for food and the need for food security and sustainability. This review summarizes the available evidence for various information and communication technologies (ICTs) that can support collaborative actions, prevent fraud, and enable real-time monitoring in the food system, especially during the COVID-19 pandemic. Technologies such as the Internet of Everything, 6G, blockchain, artificial intelligence, and digital twin are gaining attention for their potential to enhance the food supply chain. The paper emphasizes the importance of utilizing ICTs to mitigate the vulnerability of the food system.
Article
Engineering, Electrical & Electronic
Adnan E. Ali, Goran M. Stojanovic, Varun Jeoti, Dalibor Sekulic, Ankita Sinha
Summary: This study aims to design a fully-textile wearable antenna for radio-frequency harvesting and short-range communication. The antenna was fabricated using silver conductive threads and embroidery technique on a cotton textile. The performance of the antenna was evaluated under various conditions, and the results are crucial for designing future wearable antennas in the concept of the Internet of bodies.
INTERNATIONAL JOURNAL OF ANTENNAS AND PROPAGATION
(2022)
Article
Polymer Science
Adrian K. Stavrakis, Mitar Simic, Goran M. Stojanovic
Summary: In recent years, there has been an increased focus on creating wearable devices that can sense multiple parameters while being imperceptible to the user. This has led to attention being drawn towards textile electronics, where conductive threads are commonly used. However, the performance and stability of these threads have not been extensively studied. This research aims to investigate the effects of tension on readily available conductive threads and determine their suitability and reliability for e-textile applications. The study shows that the nominal parameters provided by manufacturers do not align with experimentation and that both embroidery and washing impact the performance of these threads.
Article
Biophysics
Bozica Kovacevic, Susbin Raj Wagle, Corina Mihaela Ionescu, Melissa Jones, Michael Lewkowicz, Elaine Y. M. Wong, Sanja Kojic, Goran Stojanovic, Maja Danic, Momir Mikov, Armin Mooranian, Hani Al-Salami
Summary: Deoxycholic acid (DCA) was incorporated in sodium alginate (SA) and poloxamer 407 matrices to create a novel DCA-copolymer hydrogel for therapeutic delivery. The hydrogels' rheological properties were assessed, and their biocompatibility and biological effects on various cell lines were examined. The data obtained suggest that a low dose of DCA in permeable, biocompatible hydrogels can be beneficial for cells to combat hypoxic conditions.
COLLOIDS AND SURFACES B-BIOINTERFACES
(2023)
Article
Engineering, Electrical & Electronic
Mitar Simic, Adrian K. Stavrakis, Tijana Kojic, Varun Jeoti, Goran M. Stojanovic
Summary: This article presents a method for in situ parameter estimation of the Randles circuit. It overcomes the limitations of iterative and PC-based estimation approaches and is suitable for implementation on cost-effective microcontroller-based portable systems.
IEEE SENSORS JOURNAL
(2023)
Article
Engineering, Electrical & Electronic
Mitar Simic, Adrian K. Stavrakis, Milan Radovanovic, Asif Iqbal, Varun Jeoti, Goran M. Stojanovic
Summary: This article proposes a method for wireless readout of LC sensors using a portable device, which eliminates the need for costly and bulky laboratory equipment. The device is realized in the form of a printed circuit board (PCB) compatible with Arduino boards. The resonant frequency of the LC sensor is detected from the processing of the measured voltage across the reference resistor. Wireless readout of ten LC tags with the proposed device and laboratory impedance analyzer showed that the relative differences in estimated values are lower than 4% within the frequency range of 1-10 MHz.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2023)
Article
Materials Science, Multidisciplinary
Ankita Sinha, Adrian K. K. Stavrakis, Mitar Simic, Goran M. M. Stojanovic
Summary: This study presents a fully textile-based stretchable face mask humidity sensor created using digital embroidery technique. The sensor consists of interdigitated structured electrodes made up of polymer core-based conductive silver-coated threads and hygroscopic threads embedded between them. The fabricated sensor performs well in moisture detection, with the resistance of the mask sensor decreasing as relative humidity increases and the operational frequency changes from 1 Hz to 200 kHz. The electrical response of the novel thread-based sensor towards change in relative humidity is recorded and shown in this work. Embroidering polymer-based threads onto the face mask for humidity sensing offers a novel wearable platform for detecting various breath biomarkers and early diagnosing diseases.
JOURNAL OF MATERIALS SCIENCE
(2023)
Article
Materials Science, Textiles
Lazar Milic, Dejan Movrin, Mitar Simic, Varun Jeoti, Goran M. Stojanovic
Summary: This study aims to expand the methods of modular connectivity between textile electronics and classical electrical components and printed circuit boards, with a focus on testing the electrical properties of conductive textile lines. The fabrication process involves embroidering conductive threads onto cloth and designing 3D printed connectors for stable connections with pin-based systems. The main focus of the study is to test the effectiveness of the connection between textile endings and pins, as well as the impact of external influences on the designed textile structure. The results show changes in impedance modulus after washing and significant alterations in parallel wire connections when artificial sweat is applied.
TEXTILE RESEARCH JOURNAL
(2023)
Article
Computer Science, Information Systems
Danijela Protic, Miomir Stankovic, Radomir Prodanovic, Ivan Vulic, Goran M. Stojanovic, Mitar Simic, Gordana Ostojic, Stevan Stankovski
Summary: Anomaly-based intrusion detection systems classify computer network behavior by identifying deviations from the statistical model of typical behavior. Feature selection and feature scaling are commonly used techniques to improve classifier performance.
Article
Materials Science, Textiles
Goran M. Stojanovic, Lazar Milic, Ali A. Endro, Mitar Simic, Ines Nikolic, Miroslav Savic, Snezana Savic
Summary: This article presents a sensing element for detecting date rape drugs in drinks. The element uses a three-dimensional printed holder with embroidered electrodes to form a capacitive structure. Experimental tests demonstrated the selectivity, repeatability, and sensitivity of the sensor, which can successfully detect drugs in drinks and protect against such assaults in the real world.
TEXTILE RESEARCH JOURNAL
(2023)
Article
Computer Science, Information Systems
Asif Iqbal, Micheal Drieberg, Varun Jeoti, Azrina Abd Aziz, Goran M. Stojanovic, Mitar Simic, Nazabat Hussain
Summary: This work proposes a novel Iterative Multiband Spectrally Constrained Time-Domain technique to reduce the residual error of correlation caused by spectrally constrained waveforms. The performance of the technique is evaluated through numerical experiments and compared with known channel state information and conventional techniques. The results show that the proposed technique outperforms conventional techniques in low signal-to-noise ratio scenarios and requires fewer pilot signals.
