Article
Chemistry, Multidisciplinary
Hao Dong, Xubin Zheng, Chen Cheng, Libin Qian, Yaoxuan Cui, Weiwei Wu, Qingjun Liu, Xing Chen, Yanli Lu, Qing Yang, Fenni Zhang, Di Wang
Summary: By leveraging dual-focus imaging, a complementary metal-oxide-semiconductor (CMOS) imager is transformed into a compact multimodal sensing platform capable of detecting visual information, chemicals, temperature, and humidity, and outputting them as a single image. It has been applied to micro-vehicles for multimodal environmental sensing and mapping, as well as to a multimodal endoscope for simultaneous imaging and chemical profiling along a porcine digestive tract. This multimodal CMOS imager is compact, versatile, and extensible, making it suitable for applications in microrobots, in vivo medical apparatuses, and other microdevices.
Article
Chemistry, Multidisciplinary
Di Wang, Libin Qian, Fenni Zhang, Kyle Mallires, Vishal Varun Tipparaju, Jingjing Yu, Erica Forzani, Changku Jia, Qing Yang, Nongjian Tao, Xiaojun Xian
Summary: The study demonstrates a technology that can turn a CMOS imager into a multiplexed colorimetric sensing chip by coating micron-scale sensing spots on its surface. The sensitivity is enhanced by nanocomposites of colorimetric sensing probes and silica nanoparticles, allowing high-performance gas sensing even on small sensing spots. A smartphone accessory based on this chemical CMOS sensor has been developed, proving its compatibility with mobile electronics.
Article
Thermodynamics
Xihui Liu, Yan Wang, Yilun Gao, Cong Liu, Jinhan Mo
Summary: Considering the potential health risks of ambient particulate matter (PM) in the built environment, PM sampling is essential for understanding its environmental and health effects. This study proposed a miniaturized electrostatic sampler based on corona discharge and a modified vertically focused electric field for efficient PM sampling. The collection efficiencies were analyzed and simulated, and the results were validated through experimental testing. The novel electrostatic sampler showed great potential for efficient and convenient PM sampling.
BUILDING SIMULATION
(2023)
Article
Engineering, Chemical
Hayden A. Hedworth, Tofigh Sayahi, Kerry E. Kelly, Tony Saad
Summary: The study investigates the impact of low-cost sensors mounted on drones on air quality measurements through wind tunnel and open-air experiments. Results show significant differences in measurements based on sensor location, emphasizing the importance of selecting appropriate sensor positions. This study lays the groundwork for utilizing drones effectively in air quality measurements.
JOURNAL OF AEROSOL SCIENCE
(2021)
Article
Engineering, Electrical & Electronic
Hui-Chen Tsai, Chun-Hsien Liu, Sheng-Di Lin, Chia-Ming Tsai, Jau-Yang Wu
Summary: In this study, a wide radiation temperature measurement is demonstrated using a single-photon avalanche diode image array. The detection temperature window ranges from 280 degrees C to 1050 degrees C with a noise equivalent temperature difference below 1 degrees C. The thermal image obtained has a high detection rate and a spatial resolution of 80 μm.
IEEE SENSORS JOURNAL
(2022)
Article
Engineering, Electrical & Electronic
Ivan Peric, Attilio Andreazza, Heiko Augustin, Marlon Barbero, Mathieu Benoit, Raimon Casanova, Felix Ehrler, Giuseppe Iacobucci, Richard Leys, Annie Meneses Gonzalez, Patrick Pangaud, Mridula Prathapan, Rudolf Schimassek, Andre Schoening, Eva Vilella Figueras, Alena Weber, Michele Weber, Winnie Wong, Hui Zhang
Summary: The high-voltage CMOS (HVCMOS) sensors are a novel type of CMOS active pixel sensors designed for ionizing particles, implemented with deep n-well option. By biasing the substrate with high negative voltage and using lowly doped substrate, a depleted region depth of at least 30 mu m can be achieved for fast detection of electrons generated by particles.
IEEE JOURNAL OF SOLID-STATE CIRCUITS
(2021)
Article
Chemistry, Analytical
Frances Kane, Joseph Abbate, Eric C. Landahl, Mark J. Potosnak
Summary: The mobile monitoring of air pollution is an important field that can fill spatial gaps and personalize air-quality-based risk assessment. This study investigated the influence of mobile monitoring on students' environmental attitudes by exploring the relationship between PM concentrations and urban vegetation.
Article
Engineering, Electrical & Electronic
Tanya Blank, Igor Brouk, Sharon Bar-Lev, Gavriel Amar, Elie Meimoun, Shlomi Bouscher, Maxim Meltsin, Michele Vaiana, Amedeo Maierna, Maria Eloisa Castagna, Giuseppe Bruno, Yael Nemirovsky
Summary: This paper introduces a novel non-imaging digital passive Infra-Red (PIR) sensing system using a CMOS-SOI-MEMS transistor as the thermal sensor, which surpasses traditional pyroelectric sensors and thermopiles in performance. Manufactured by nano-fabrication methods in standard FABs, the mosaic sensors exhibit enhanced performance and robust manufacturing on wafer level processing and vacuum packaging. Mirror optics replaces Fresnel plastic lenses to provide enhanced performance at low-cost.
IEEE SENSORS JOURNAL
(2021)
Article
Chemistry, Multidisciplinary
Yunjia Song, Nan Chen, Qifeng Jiang, Tushita Mukhopadhyay, Wudyalew Wondmagegn, Rebekka S. Klausen, Howard E. Katz
Summary: This paper reports a new mechanism for detecting and identifying particulate matter, using synthesized carbon particles with different functional groups to mimic real particles in atmospheric aerosols. The research highlights the ability of polymer semiconductor devices to selectively detect particles with multiple functional groups, revealing a future direction for selective detection of particulate matter.
Article
Environmental Sciences
Ye-Sle Kim, Yeawan Lee, Yong-Jin Kim, Bangwoo Han, Hak-Joon Kim
Summary: An in-duct two-stage electrostatic precipitator (ESP) improved by ion diffusion effect was studied. The collection efficiency of the ESP was increased by adjusting the space arrangement of the charger and the collector. The study proposed a modified charging mechanism and derived the optimal separation distance between the charger and the collector for maximum collection efficiency. The developed ESP design shows potential for energy efficiency and cost savings in indoor air management.
Review
Materials Science, Multidisciplinary
Shuo Yang, Shruti Sarkar, Xing Xie, Dan Li, Jianmin Chen
Summary: This paper conducts statistical analysis on data extracted from 138 papers, evaluating and comparing the detection performance and potential of different types of optical hydrogels (OHs) in various environmental pollutant detection scenarios, compared to standard detection methods. The target recognition and sensing mechanisms of two main types of OHs, photonic crystal hydrogels (PCHs) and fluorescent hydrogels (FHs), are reviewed and discussed. The potential academic research directions for addressing the challenges of applying and developing OHs in environmental sensing are proposed.
ENERGY & ENVIRONMENTAL MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
Ashish Pandharipande, Martijn Lankhorst, Emmanuel Frimout
Summary: This article presents a multi-modal sensor system for delivering temperature and relative humidity data around the user workspace. Fusion methods are proposed to process sensor measurements and estimate the temperature and relative humidity reliably.
IEEE SENSORS JOURNAL
(2022)
Article
Materials Science, Multidisciplinary
Mohamed J. Saadh, Hala Kh. Mohammed, A. J. Ameer, Shelesh Krishna Saraswat, Sura Mohammad Mohealdeen, H. A. AL Sailaw, Mustafa Mudhafar, Farah A. Dawood, Yasser Elmasry
Summary: The adhesion properties of Pt-doped graphdiyne for formaldehyde were studied using DFT calculations. The Pt@GRD material showed high sensitivity in detecting formaldehyde through chemical adsorption.
DIAMOND AND RELATED MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
Lucjan Grzegorzewski, Robert Zierold, Robert H. Blick
Summary: In this study, a novel coupling-based sensor operating at 20 GHz was designed to increase the sensitivity for detecting nanoscale objects. The sensor's geometry was fine-tuned for an optimal coupling coefficient, and its performance was compared with that of conventional sensors. The exceptional sensitivity of the sensor was demonstrated through the in-flow detection of 200 nm-sized polystyrene beads, achieving a high signal-to-noise ratio.
IEEE SENSORS JOURNAL
(2023)
Article
Environmental Sciences
Jaeseok Heo, Jooyeon Lee, Minyoung Yoon, Duckshin Park
Summary: In this study, a non-powered brush filter was developed to manage particulate matter at bus stops, and its removal performance was evaluated. The results showed that different brush materials had varying particle removal efficiencies, with horse hair, nylon, and stainless steel demonstrating good performance. Increasing the density of the brushes also improved dust collection. Therefore, this non-powered brush filter can effectively solve the maintenance and ozone issues associated with existing abatement devices.
Article
Engineering, Electrical & Electronic
Xingcai Qin, Xiaojun Xian, Yue Deng, Di Wang, Francis Tsow, Erica Forzani, Nongjian Tao
IEEE SENSORS JOURNAL
(2019)
Article
Engineering, Electrical & Electronic
Kyle R. Mallires, Di Wang, Vishal Varun Tipparaju, Nongjian Tao
IEEE SENSORS JOURNAL
(2019)
Article
Chemistry, Analytical
Kyle R. Mallires, Di Wang, Peter Wiktor, Nongjian Tao
ANALYTICAL CHEMISTRY
(2020)
Review
Chemistry, Multidisciplinary
Jingjing Yu, Di Wang, Vishal Varun Tipparaju, Francis Tsow, Xiaojun Xian
Summary: Colorimetric sensing technologies are widely used for gas sensing, but the humidity interference is a common challenge that needs to be addressed for real-world applications.
Article
Chemistry, Multidisciplinary
Di Wang, Fenni Zhang, Amlendu Prabhakar, Xingcai Qin, Erica S. Forzani, Nongjian Tao
Summary: Breath acetone (BrAce) is a validated biomarker of lipid oxidation and has been extensively studied for various applications, such as monitoring ketoacidosis in diabetes. While many sensors have been reported for BrAce measurement, most only tested synthetic or spiked breath samples. A colorimetric sensor has been shown to achieve online accurate detection of BrAce.
Article
Chemistry, Multidisciplinary
Chenwen Lin, Zijian Du, Nongjian Tao, Di Wang
Summary: The gradient-based colorimetric array sensor (GCAS) overcomes the limitations of traditional colorimetric sensors by inkjet-printing different colorimetric sensing elements on a porous substrate in parallel straight lines. By tracking color gradients and converting them into analyte concentrations in real time, GCAS can detect multiple air pollutants and continuously monitor ambient ozone.
Article
Chemistry, Multidisciplinary
Wei Fu, Linxin Xu, Qiwen Yu, Jiajia Fang, Guohua Zhao, Yi Li, Chenying Pan, Hao Dong, Di Wang, Haiyan Ren, Yi Guo, Qingjun Liu, Jun Liu, Xing Chen
Summary: This study proposes an artificial intelligent olfactory (AIO) system for the diagnosis of Parkinson's disease (PD) through smell. The results show that analyzing the odor profile can accurately distinguish PD patients from healthy controls, which is helpful for further tracking and monitoring the treatment process.
Article
Materials Science, Ceramics
Long Chen, Yanhua Song, Qiwen Yu, Hao Dong, Chenying Pan, Di Wang, Jun Liu, Xing Chen
Summary: In this study, Tb-doped Fe2O3 nanotubes were successfully synthesized and used for detecting acetone gas. The results showed that the 5% Tb-Fe2O3 nanotubes exhibited higher sensing response towards 50 ppm acetone at 170 ℃, as well as good selectivity and low detection limit.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Multidisciplinary
Yingying Jian, Nan Zhang, Taoping Liu, Yujin Zhu, Di Wang, Hao Dong, Lihao Guo, Danyao Qu, Xue Jiang, Tao Du, Youbin Zheng, Miaomiao Yuan, Xuemei Fu, Jinmei Liu, Wei Dou, Fang Niu, Ruizhi Ning, Guangjian Zhang, Jinhai Fan, Hossam Haick, Weiwei Wu
Summary: This study reports on a cost-efficient artificially intelligent chemiresistive sensor array that can noninvasively diagnose bladder cancer at an early stage and maintain postoperative surveillance through smelling clinical urine samples. Clinical trials show that the system achieves very high sensitivity and accuracy in diagnosing both healthy controls and bladder cancer patients.
Article
Chemistry, Multidisciplinary
Di Wang, Libin Qian, Fenni Zhang, Kyle Mallires, Vishal Varun Tipparaju, Jingjing Yu, Erica Forzani, Changku Jia, Qing Yang, Nongjian Tao, Xiaojun Xian
Summary: The study demonstrates a technology that can turn a CMOS imager into a multiplexed colorimetric sensing chip by coating micron-scale sensing spots on its surface. The sensitivity is enhanced by nanocomposites of colorimetric sensing probes and silica nanoparticles, allowing high-performance gas sensing even on small sensing spots. A smartphone accessory based on this chemical CMOS sensor has been developed, proving its compatibility with mobile electronics.
Article
Chemistry, Multidisciplinary
Yaoxuan Cui, Xubin Zheng, Chen Shen, Libin Qian, Hao Dong, Qingjun Liu, Xing Chen, Qing Yang, Fenni Zhang, Di Wang
Summary: This study demonstrates on-chip integration of visual and olfactory sensations through a dual-focus imaging approach, achieving 100% accuracy in food detection and providing a promising approach for robotic sensing and perception.
Article
Physics, Applied
Tianqing Liu, Yujin Zhu, Lihao Guo, Hao Dong, Min Zhang, Haowen Guo, Chen Su, Di Wang, Wenwen Hu, Hossam Haick, Weiwei Wu
Summary: As a promising technology in various fields, including health management, environmental monitoring, public safety, agriculture, and food production, electronic nose, which is a volatile organic compounds detection technology, plays an important role. However, due to the artificial characteristics caused by the sensor's location, the recognition becomes difficult and even incredible. Inspired by the nasal cavity structure, a small volume chamber with well-controlled fluidic behavior was designed and fabricated to achieve uniform flow field and concentration field. The experiments confirmed that the well-controlled fluidic behaviors of volatile analytes help achieve ultra-sensitive detection.
APPLIED PHYSICS REVIEWS
(2023)
Proceedings Paper
Engineering, Industrial
Zijian Du, Lingling Pu, Jiaoying Tan, Paul Wei, Jeeeon Kim
Summary: This paper presents a self-supervised approach to enhance SEM image quality under low dose imaging conditions. The approach is able to improve the resolution of key features while reducing the noise level. Performance evaluation shows the feasibility and effectiveness of the method.
METROLOGY, INSPECTION, AND PROCESS CONTROL XXXVI
(2022)
