Article
Engineering, Electrical & Electronic
Ruichen Liu, Dongcheng Xie, George Adedokun, Feng Xue, Lei Xu, Feng Wu
Summary: This paper presents a ZnO-based gas sensor fabricated using MEMS process, featuring a narrow bridge-type micro-heater with ultra-low static power consumption. By depositing sensing materials on the heater using PVD sputtering, a sandwiched ZnO/Au/ZnO structure was formed to enhance sensitivity to ethanol. The sensor achieved a best sensitivity of 15 (R-air/R-gas) to 100 ppm ethanol while consuming a low power of 12.17 mW.
IEEE SENSORS JOURNAL
(2021)
Article
Engineering, Electrical & Electronic
Jiayu Wang, Hong Zhou, Yi Wang, Ming Wu, Yanxiang Liu, Gang Huang, Tie Li
Summary: A novel micro-thermal conductivity detector with a semi-diffusion gas channel is demonstrated, which can reduce flow-rate interference and maintain fast response speed. The semi-diffusion design effectively decreases the temperature deviation and is validated under different gas conditions.
JOURNAL OF MICROMECHANICS AND MICROENGINEERING
(2022)
Article
Chemistry, Analytical
Jiayu Wang, Yanxiang Liu, Hong Zhou, Yi Wang, Ming Wu, Gang Huang, Tie Li
Summary: This article proposes novel thermal gas sensors with newly designed diffusion gas channels to reduce the flow-rate disturbance. Experimental and simulation results indicate that this design improves the flow-rate independence and accuracy of the sensors.
Article
Chemistry, Analytical
Dong Geon Jung, Junyeop Lee, Jin Beom Kwon, Bohee Maeng, Hee Kyung An, Daewoong Jung
Summary: In order to realize portable gas sensor applications, it is necessary to develop hydrogen sulfide (H2S) microsensors that operate at lower voltages with high response, selectivity, stability, and fast response and recovery times. This study proposes tin (IV)-oxide (SnO2)-based H2S microsensors with different geometrically designed embedded micro-heaters, which provide good detection capability at a low operating voltage.
Article
Materials Science, Multidisciplinary
Xing Li, Hongfen Yang, Shaorong Lu, Ren Cai
Summary: A flexible film called PPA film was designed as a multifunctional sensor with high electrical conductivity, rapid electrothermal response, and high strain sensitivity. The film contains polyvinyl alcohol (PVA), graphene nanosheets (GNs), nanocellulose crystals (CNCs), polydopamine (PDA), and silver nanoparticles (Ag NPs). It was found that the PPA film exhibited good stability and cycling durability, and the flexible sensor designed from PPA films showed high sensitivity to bending strain.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Review
Chemistry, Analytical
Ethan L. W. Gardner, Julian W. Gardner, Florin Udrea
Summary: In recent years, there has been an increasing demand for gas sensors to monitor and control harmful substances arising from industrial processes. Thermal conductivity gas sensors offer advantages over chemical sensors, such as higher reproducibility, better stability, lower cost, and faster response time. This review focuses on the state-of-the-art in thermal conductivity sensors, including introduction, theory of operation, interface electronics, commercial applications, recent research developments, and innovations in this field.
Review
Engineering, Chemical
Lung-Jieh Yang, Reshmi Waikhom, Horng-Yuan Shih, Yi-Kuen Lee
Summary: This article reviews the CMOS MEMS foundry service provided by Taiwan Semiconductor Research Institute and showcases a new flow sensor fabricated by UMC's latest 0.18μm CMOS MEMS process. The integrated flow sensor demonstrates improved sensitivity and justifies the advantages of CMOS MEMS flow sensors.
Article
Thermodynamics
Tingting Zhu, Ji Zhang
Summary: This study optimized the operation conditions and geometrical parameters of a solar air heater using micro-heat pipe arrays, determining the optimal inlet velocity, air layer thickness, and fins geometrical parameters.
Article
Energy & Fuels
Geeta Verma, Satyender Singh, Subhash Chander, Prashant Dhiman
Summary: This study predicts the thermal performance of a PCM embedded parallel flow solar air heater using differential air flow arrangements. The transient computational iterative solution procedure accurately predicts the transient temperatures for a 24-hour working cycle, including sunny and nocturnal hours. The results reveal significant thermal energy storage and heat gain under different time and air flow rate arrangements.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Thermodynamics
Julian Schmid, Michele Gaffuri, Alexandros Terzis, Peter Ott, Jens von Wolfersdorf
Summary: Heat transfer measurements are essential in various fields, and transient methods are often used for local heat transfer resolution. However, complex flows can pose challenges for determining heat transfer coefficients. The transient heater foil method addresses this issue by generating a constant heat flux on the surface under study.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Article
Engineering, Electrical & Electronic
Chia-Hsu Hsieh, Tsung-Wei Lin, Feng-Renn Juang, I-Yu Huang
Summary: This research develops an ammonia micro-gas sensor using micro-electromechanical systems (MEMS) technology. It integrates a suspended micro-heater on the same chip to optimize the operating temperature. The sensor is fabricated through photolithography and thin-film deposition processes. To reduce heat loss, anisotropic wet etching of MEMS technology is used to create a suspension structure. Tungsten trioxide is employed as the sensing film for resistance measurement. The developed micro ammonia sensor has a chip size of 5 mm x 5 mm and exhibits a high sensing response, low detection limit, and small size.
JOURNAL OF MICROMECHANICS AND MICROENGINEERING
(2023)
Article
Thermodynamics
Stephen Adeoye, Anatoly Parahovnik, Yoav Peles
Summary: This study investigated the characteristics of microm jet impingement heat transfer with supercritical CO2, revealing that high heat transfer coefficients can be achieved under certain conditions. Additionally, a Nusselt number correlation for micro jet impingement with sCO2 was proposed.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Article
Polymer Science
Jonam Cho, Gunchul Shin
Summary: Thin-film micro-heaters can be wirelessly operated and are suitable for various wearable devices, improving the performance of gas sensors by increasing detection capabilities and reducing recovery time for carbon monoxide detection.
Article
Thermodynamics
Jiaheng Chen, Hang Li, Dingbiao Wang
Summary: This study investigates the transient response characteristics of the direct expansion solar assisted ejector-compression heat pump cycle for water heater and provides data support for control-oriented design and practical application. The dynamic simulation model is built and verified through relevant experimental items. The results show satisfactory agreement between the experimental and simulation results. The study also explores the system's transient responses under different conditions and reveals the coupling relation of system pressure and refrigerant flow rate. Furthermore, the impact of substituting refrigerants on the system's dynamic characteristics is proved to be minimal.
APPLIED THERMAL ENGINEERING
(2022)
Article
Engineering, Electrical & Electronic
Xin Ma, Qi Zhang, Peng Guo, Hao Li, Yulong Zhao, Aiying Wang
Summary: In this study, a micro-pressure sensor based on DLC/Si3N4/SiO2 films was reported, which demonstrated high sensitivity and stability. The sensor showed minimal sensitivity changes even with dramatic temperature variations. Additionally, the sensor could be compensated using the DLC thermal compensation resistor.
IEEE SENSORS JOURNAL
(2022)
Editorial Material
Electrochemistry
Rangachary Mukundan, Ajit Khosla, Peter Hesketh, William Heineman, Osamu Niwa
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2017)
Editorial Material
Electrochemistry
Rangachary Mukundan, Ajit Khosla, Praveen Kumar Sekhar, Peter Hesketh, Charles Henry, Luca Magagnin
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2018)
Article
Chemistry, Analytical
Daniel Struk, Amol Shirke, Alireza Mahdavifar, Peter J. Hesketh, Joseph R. Stetter
SENSORS AND ACTUATORS B-CHEMICAL
(2018)
Article
Chemistry, Physical
Srinivas Hanasoge, Peter J. Hesketh, Alexander Alexeev
Article
Nanoscience & Nanotechnology
Srinivas Hanasoge, Peter J. Hesketh, Alexander Alexeev
MICROSYSTEMS & NANOENGINEERING
(2018)
Article
Chemistry, Analytical
Jialuo Chen, Ardalan Lotfi, Peter J. Hesketh, Satish Kumar
SENSORS AND ACTUATORS B-CHEMICAL
(2019)
Article
Chemistry, Analytical
Tzu-Hsuan Chang, Daniel Struk, Milad Navaei, Vladimir M. Doroshenko, Victor Laiko, Eugene Moskovets, Konstantin Novoselov, Jean-Marie D. Dimandja, Peter J. Hesketh
SENSORS AND ACTUATORS B-CHEMICAL
(2020)
Article
Nanoscience & Nanotechnology
Srinivas Hanasoge, Peter J. Hesketh, Alexander Alexeev
ACS APPLIED MATERIALS & INTERFACES
(2020)
Proceedings Paper
Engineering, Electrical & Electronic
Ardalan Lotfi, Christopher A. Heist, Alexander Warren, Milad Navaei, Peter J. Hesketh
Article
Electrochemistry
Morgan J. Anderson, Jessica E. Koehne, Peter J. Hesketh
ELECTROCHEMICAL SOCIETY INTERFACE
(2019)
Editorial Material
Electrochemistry
Peter J. Hesketh, Joseph Stetter, Xiangqun Zeng
ELECTROCHEMICAL SOCIETY INTERFACE
(2019)
Article
Materials Science, Multidisciplinary
Ardalan Lotfi, Milad Navaei, Peter J. Hesketh
ECS JOURNAL OF SOLID STATE SCIENCE AND TECHNOLOGY
(2019)
Proceedings Paper
Engineering, Electrical & Electronic
Daniel Struk, Chintan Buch, Peter J. Hesketh, Klaus-Juergen Wolter, Rao Tummala
2017 IEEE 67TH ELECTRONIC COMPONENTS AND TECHNOLOGY CONFERENCE (ECTC 2017)
(2017)
Proceedings Paper
Engineering, Electrical & Electronic
Chintan Buch, Daniel Struk, Klaus-Juergen Wolter, Peter J. Hesketh, Venky Sundaram, Rao Tummala, Catherine Shearer, James Haley, Mel Findlay, Marc Papageorge
2017 IEEE 67TH ELECTRONIC COMPONENTS AND TECHNOLOGY CONFERENCE (ECTC 2017)
(2017)
Review
Electrochemistry
Gary W. Hunter, Sheikh Akbar, Shekhar Bhansali, Michael Daniele, Patrick D. Erb, Kevin Johnson, Chung-Chiun Liu, Derek Miller, Omer Oralkan, Peter J. Hesketh, Pandiaraj Manickam, Randy L. Vander Wal
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2020)