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"IEEE Sensors Alert" is a pilot project of the IEEE Sensors Council. Started as one of its new initiatives, this weekly digest publishes teasers and condensed versions of our journal papers in layperson's language.
Articles Posted in the Month (July 2025)
Flexible Conductive Polymer Reinforced Polyurethane Foam for Real-Time Human Body Electrical Signal Sensing and ECG Peaks
Author: Subramanian Jeyanthi, M Suchetha, Rajeev Krishna, Vijayan Akash
Published in: IEEE Sensors Journal (Volume: 25, Issue: 3, February 2025)
Summary Contributed by: Saurabh Dubey
Polymer composites made from conductive and flexible material are transforming wearable health devices. This study introduces a soft, flexible foam made from polyurethane and reinforced with conductive polymers, designed to detect the human body’s electrical signals like electrocardiogram (ECG). This sensor captures real-time data without requiring the traditional gel electrodes. The eco-friendly device provides stable monitoring and enhances accuracy and comfort, making it ideal for wearable medical technologies and biosensing applications.
Monitoring the properties of aqueous solutions is essential across various industries like agriculture and oceanics. This paper introduces a novel, low-cost, interdigitated electrode (IDE) sensor based on electrochemical impedance spectroscopy to assess the properties of aqueous solutions. This sensor effectively detects subtle differences in concentration and provides reliable pH measurements with high sensitivity, showing its potential for applications in different areas, like the food industry and environmental and biological studies.
Author: Joseph Jose, A. V. Akshaya, ANANTHASURESH G. K., Bosco Michael John, Nair Nikila
Published in: IEEE Sensors Journal (Volume: 25, Issue: 1, January 2025)
Summary Contributed by: Anupama
Traditional glass pH sensors often degrade in harsh environments and become ineffective under extreme pH conditions. This study introduces an innovative all-solid-electrode pH sensor featuring an antimony sensing electrode and an Ag/AgCl solid reference electrode. The sensor demonstrated stability, repeatability and linear performance in controlled and real-world applications. It offers a robust, durable, low-maintenance solution for continuous inline pH monitoring in various fields, including food processing, water treatment, agriculture, and pharmaceuticals.
Flexible Electrospun Nanofibers for Tactile Sensing and Integrated System Research
Author: Chen Rongsheng, Ma Zhiling, Huang Wei, Yang Mei
Published in: IEEE Sensors Journal (Volume: 25, Issue: 1, January 2025)
Summary Contributed by: Rongsheng Chen (Author)
The demand for flexible sensors has grown with the advancement in wearable technology and smart systems. This paper discusses the development of a flexible piezoelectric sensor using electrospun nanofibers with a controlled structure and alignment, which improves the sensor's performance. It highlights the advantages and exceptional piezoelectric properties, flexibility, and sensitivity of materials like polyvinylidene fluoride (PVDF) and its copolymers. Its applications include wearable electronics, human-computer interaction, electronic skins, and soft robotics.
Highly Sensitive Flexible Sensor Over a Wide Linear-Range Based on Carbon Nanotube Toward Physiological Monitoring
Author: Pan Gebo, Gao Xin, Lv Peiyu, Qin Xu, Xu Wenqing, Yang Limei
Published in: IEEE Sensors Journal (Volume: 25, Issue: 3, February 2025)
Summary Contributed by: Saurabh Dubey
Capacitive pressure sensing is crucial in real-time physiological monitoring and human-robot interaction. This study presents a novel sensor developed using a composite dielectric layer of polyvinylidene fluoride, thermoplastic polyurethane, and multi-walled carbon nanotubes (MWCNTs). Its exceptional sensitivity and wide range effectively detect substantial and subtle human motion, including swallowing and muscle and joint movement. Flexibility, mechanical stability, and responsiveness make it suitable for next-generation wearable health monitoring and healthcare applications.
Microwave Glucose Sensing Using Double Circular Split Ring Resonators for Improved Sensitivity: The Role of Artificial Blood Plasma and Deionized Water
Author: Borges Ben-hur, Alarcon Julio Cesar, Pepino Vinicius Marrara, Santos Natalia M., Souza Mateus Isaac de Oliveira, Varanda Laudemir C.
Published in: IEEE Sensors Journal (Volume: 25, Issue: 3, February 2025)
Summary Contributed by: Borges Ben-hur (Author)
Accurate and affordable glucose monitoring is vital for managing diabetes, affecting millions worldwide. This research presents a compact, passive 2.48 GHz microwave sensor for enhanced glucose monitoring. The sensor's accuracy is significantly boosted by replacing deionized water with artificial blood plasma, achieving a 0-400 mg/dL range with 25 mg/dL resolution. Low cost and license-free operation make this novel sensor promising for comfortable, accurate, and accessible next-generation wearable health devices.
Research on Intelligent Diagnosis Method of Swallowing Signal Based on Complex Electrical Impedance Myography
Author: Yu Shaoshuai, Chu Xu, Fu Letian, Fu Zhang, Liu Qi, Yang Yuxiang
Published in: IEEE Sensors Journal (Volume: 25, Issue: 4, February 2025)
Summary Contributed by: Payal Savani
Dysphagia or swallowing disorders occur when the muscles or nerves involved in swallowing malfunction. Early and accurate detection will reduce risks to health and life. This study presents an innovative diagnostic framework that integrates Complex Electrical Impedance Myography (C-EIM) with advanced machine learning algorithms that analyze both amplitude and phase data. The smart system achieves an accuracy of 95.2%, demonstrating strong potential in early diagnosis and clinical decision-making for managing dysphagia.
Microneedle Uric Acid Biosensor With Graphite Ink and Electrodeposited MWCNT
Author: Kameoka Jun, Kawahira Hiroshi, Nohgi Toru, Tu Yifan
Published in: IEEE Sensors Journal (Volume: 25, Issue: 3, February 2025)
Summary Contributed by: Jun Kameoka (Author)
Uric acid is a well-established biomarker for gout. Recent studies have suggested its prospective as an indicator of visceral fat accumulation, particularly in monitoring metabolic syndrome. This paper introduces a microneedle-based uric acid biosensor using graphite ink and electrodeposited multi-walled carbon nanotubes (MWCNTs). The device supports non-invasive, real-time monitoring of uric acid concentrations in interstitial skin fluid (ISF). It has excellent potential for point-of-care applications and integration into wearable health technologies.
Parallel Detection of Mixed Pesticides Based on Dual Quantum Dot/Porous Silicon Optical Biosensors
Author: Jia Zhenhong, Cao Jianghong, Huang Xiaohui, Lv Xiaoyi, Wang Jiajia, Yang Jie, Yue Haitao
Published in: IEEE Sensors Journal (Volume: 24, Issue: 23, December 2024)
Summary Contributed by: Saurabh Dubey
Pesticide detection is vital for protecting human health and the environment. The proposed optical biosensor uses dual quantum dots and porous silicon technology to provide a cost-effective and real-time solution for detecting mixed pesticides. With high sensitivity, stability, and low cross-reactivity, this biosensor can efficiently monitor pesticides, thus improving food and environmental safety. Its application in resource-limited areas helps reduce costs and facilitates automated pesticide monitoring and detection.
Liquid Crystal Microlens Arrays Based on Aluminum-Doped Zinc Oxide Oriented Microstructure Facilitate Light Field Image Resolution Enhancement
Author: Li Hui, Li Zikang, Qiao Chuan, Wu Yuntao
Published in: IEEE Sensors Journal (Volume: 25, Issue: 4, February 2025)
Summary Contributed by: Hui Li (Author)
Light-field cameras are excellent at capturing comprehensive scene information; however, they often face issues due to unstable liquid crystal (LC) alignment in their liquid crystal microlens arrays (LC-MLAs). This study introduces an LC-MLA imaging system based on an aluminum-doped zinc oxide (AZO) alignment layer, achieving ordered LC alignment. The system enhances image resolution by integrating full variational denoising and convex optimization, contributing significantly to the advancements in light-field imaging technology.
RFID-a radio-frequency identification technology, is gaining popularity as a wireless sensor for track and trace applications. The high cost of chipped-RFID tags makes them unsuitable for mass production. The Chipless-RFID tag is lightweight, durable, reliable, and energy-sufficient and can be mass-produced using inexpensive conductive inks or yarns. Improving range and data capacity in chipless-RFID tags could make them indispensable as wearables.
The sense of touch has a different significance in the human body than other senses, like hearing, sight, smell, and taste. The dexterous use of our hands for touch depends on the intelligent use of tactile perception. However, robotic hands lack the same level of dexterity as human hands. The researchers are working to develop methods to simulate the capabilities of the human sense of touch in machines.
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