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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 (December 2025)
Photo-Assisted Selective and Reversible Acetone Sensors Based on 2-D MoSe₂ Nanoflakes
Author: Ray S. K., Das Saranya, Das Shreyasi
Published in: EEE Sensors Journal (Volume: 25, Issue: 11, June 2025)
Summary Contributed by: Saranya Das (Author)
Driven by industrial growth and urbanization, research in volatile organic compounds (VOC) sensing has gained importance for environmental and medical applications. This study introduces a two-dimensional molybdenum diselenide (MoSe2)-based chemiresistor for acetone detection at room temperature, featuring high selectivity, low detection limit, and UV-light-enhanced recovery. Its simple design and low-cost fabrication make it promising for real-time VOC sensing applications.
Thermal Fault Detection of High-Speed Direct-Driven Blower Components Using Thermal-Visible Image Fusion and Semantic Segmentation
Author: Chu Ning, Ali Mohammad-Djafari, Cai Caifang, Li Li, Sun Zekun, Zhang Shanqing
Published in: IEEE Sensors Journal (Volume: 25, Issue: 12, June 2025)
Summary Contributed by: Payal Savani
Thermal fault detection is crucial for maintaining industrial blowers, as high-speed rotation can lead to overheating and performance loss. The proposed system combines thermal infrared and visible images using an Improved Diffusion-Based Fusion (IDF) model. A lightweight Convolutional Cross-Attention Encoder Network (CCAE-Net) analyzes these images, segmenting components and identifying abnormal temperature zones. This method enables accurate, real-time monitoring, enhancing the reliability, efficiency, and safety of high-speed direct-driven blowers.
Published in: EEE Sensors Journal (Volume: 25, Issue: 11, June 2025)
Summary Contributed by: Ritu Poonia (Author)
Mercury exposure poses a threat to both human health and the environment, necessitating its strict monitoring. This work introduces a dual-metal-gate AlGaN/GaN high-electron-mobility transistor (HEMT) sensor for mercury ion detection. The device features an extended electrode functionalized with thioglycolic acid for mercury detection and a quasi-reference electrode enabling gate biasing. The design improves sensitivity, selectivity, and stability while validating trace-level mercury detection through quantification analysis, offering a compact solution for environmental monitoring.
Ultralow-Cost and Selective Water-Based Colorimetric Ink for Indoor CO₂ Monitoring
Author: Maria González-Gómez, Ismael Benito-Altamirano, Joan Daniel Prades, Olga Casals, Cristian Fàbrega
Published in: IEEE Sensors Journal (Volume: 25, Issue: 11, June 2025)
Summary Contributed by: Maria González-Gómez (Author)
Indoor air quality (IAQ) control is increasingly recognized as crucial for human health. Carbon dioxide (CO₂) levels reflect co-exhaled pathogens and serve as an indicator of air quality. This work presents low-cost, printable CO₂ sensors using a novel water colorimetric ink. Operating within the relevant 150-1500 ppm range, they remain stable and selective even under 10-70% humidity. Their excellent specificity, repeatability, and affordability make them suitable for real-world applications.
Ethylenediamine-Coupled Lysine-Modified Pencil Graphite Electrode for the Quantification of Indigo Carmine
Author: R Rejithamol, Sadanandan Sandhya, C Devu, P J Sreelekshmi, V Devika
Published in: IEEE Sensors Journal (Volume: 25, Issue: 11, June 2025)
Summary Contributed by: R. Rejithamol (Author)
The widespread use of synthetic food colors has raised concerns about public health safety and the need for effective detection methods. In this study, a novel compound, ethylenediamine-coupled lysine (EDAK), was used to modify a pencil graphite electrode (PGE) through electropolymerisation for the detection of indigo carmine. The developed sensor exhibited high sensitivity, excellent selectivity, and a low detection limit, offering a cost-effective and reliable option for food safety monitoring.
A Novel Anti-Relaxation Material Applied in Miniaturized Atomic Spin Gyroscope
Author: Li Shun, Bi Zhangzhe, Lin Longbin, Wu Yunong, Xu Fangqi, Zhang Haifeng
Published in: EEE Sensors Journal (Volume: 25, Issue: 11, June 2025)
Summary Contributed by: Saurabh Dubey
A novel perfluorododecyltrichlorosilane (PDTS) anti-relaxation coating enhances miniaturized atomic spin gyroscopes (NMRGs) by reducing spin relaxation in tiny vapor cells. Offering excellent thermal stability, strong adhesion, and ultralow surface energy, PDTS extends transverse relaxation time to 28.8 s, surpassing traditional methods. Validated via spectroscopy and atomic force microscopy, it improves spin coherence, sensitivity and reliability. Ideal for UAV navigation and GPS-denied environments, it enables next-generation compact gyroscopes with superior performance.
Radio Frequency Characterization of Gold Nanoparticles With 3-D Printed U-Cavity Sensor
Author: Kattel Bibek, Hutchcraft Winn Elliott, Syed Azeemuddin, Tanner Eden E. L., Vashisth Priyavrat
Published in: IEEE Sensors Journal (Volume: 25, Issue: 12, June 2025)
Summary Contributed by: Bibek Kattel (Author)
Gold nanoparticles (AuNPs) have diverse applications in medicine, electronics, optical devices, sensors, and sensing technologies. Hence, the development of advanced characterization technology to determine its potential toxicity is essential. This paper introduces a novel 3D-printed U-cavity sensor for radio frequency (RF) characterization of gold nanoparticles based on three different geometric shapes. Each nanoparticle's shape exhibited a unique RF spectral signature, enabling the accurate characterization of the gold nanoparticles.
Published in: IEEE Sensors Journal (Volume: 25, Issue: 12, June 2025)
Summary Contributed by: Kamalesh Tripathy
Cinnamic acid (CA) has multiple benefits, including its antioxidant, anti-inflammatory, antibacterial, and anticancer properties. However, its unregulated usage has harmful effects. This paper introduces a novel molecularly imprinted polymer-based graphite electrode developed for the detection and quantification of CA in black tea and cinnamon powder. Using differential pulse voltammetry, it shows a wide linear range (1–1000 µM) and a low detection limit (8.2 nM), exhibiting excellent repeatability and stability.
Author: Yang Xh, Gao Shuai, Ge Zhongxuan., Jones Adam, Li Kang, Liu Zhihai, Ma Minghua., Sivanathan Sivagunalan, Teng Pingping, Tian Fengjun, Wang Shengjia, Wen Xingyue., Zhang Bo, Zhang Yang, Zhang Yu, Zhu Zheng
Published in: IEEE Sensors Journal (Volume: 25, Issue: 11, June 2025)
Diabetes management usually involves frequent checks of blood glucose levels. This study proposes an early prototype of a skin-friendly photoelectrochemical (PEC) sensing patch for noninvasive glucose monitoring. The patch uses a tiny optical fiber coated with specialized materials and an enzyme that reacts only with glucose. It delivers fast and accurate readings, even at very low glucose levels, making it a promising tool for painless, real-time health monitoring.
Design and Implementation of a System to Control Bioreceptor Layer Formation on Au Electrodes
Author: Przadka Marcin Paweł, Pala Katarzyna, Wojcieszak Damian
Published in: IEEE Sensors Journal (Volume: 25, Issue: 11, June 2025)
Summary Contributed by: Payal Savani
In electrochemical biosensors, electrodes convert biochemical reactions into accurate electrical signals. Their surface quality and preparation directly influence the sensor's accuracy. This study introduces an in-situ quality control system to monitor bioreceptor layer formation on gold electrodes in aquaculture biosensors. By integrating real-time measurements of the wetting angle and electrochemical impedance, the system detects defects early, ensures consistent electrode performance, improves reproducibility, and enables efficient, automated production of biosensors.
The recent COVID outbreaks highlighted the need for breathing rate monitoring and increased the demand for hospitalized patients. Monitoring breathing rate is vital for diagnosing diseases and observing patients with pulmonary conditions. The pros and cons of different techniques are studied and categorized under contact and remote modes of respiratory monitoring systems. Various Radar-based methods found to be more suitable for respiration monitoring are discussed.
Radar detection of smaller targets requires lowering the radar cross-section and velocity thresholds. With it, an abundance of target signatures gets generated, making it necessary to classify only relevant targets. Micro-motions of targets are significant characteristics. Micro-Doppler signatures have emerged as an effective method of classifying such targets. The study presents a systematic review of various micro-Doppler-based radar target signature analysis and classification techniques.
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