Article
Nanoscience & Nanotechnology
Yu Venhryn, V. S. Pawluk, A. S. Serednytski, D. Popovych
Summary: Research on the structural, morphological, and photoluminescent properties of Mg- and Ca-doped zinc oxide nanopowders obtained using pulsed laser reactive technology. Investigation showed potential use in gas sensors, with visible emissions likely attributed to intrinsic defects such as oxygen vacancies.
APPLIED NANOSCIENCE
(2022)
Article
Chemistry, Physical
Qihua Liang, Jingjing Zheng, Xiaotian Li, Bo Zhang, Ni Bai, Guo-Dong Li
Summary: Porous spinel gallate nanospheres prepared by solvothermal method and low temperature calcination exhibit excellent gas sensing properties, with CdGa2O4 nanospheres showing outstanding formaldehyde sensing performance at 120 degrees Celsius.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Nanoscience & Nanotechnology
Yu Venhryn, A. S. Serednytski, D. Popovych
Summary: The structural, morphological and photoluminescent properties of magnesium oxide, gallium trioxide nanopowders, and their mixes obtained using pulsed laser reactive technology were studied. The emission peaks of MgO and Ga2O3 were located at around 430 nm and 440 nm respectively. Changing the gas environment had a significant impact on the spectra intensity and deformation, which could be utilized in gas sensors. The use of mixed metal oxides (MgO/Ga2O3) showed improved sensitivity, enhanced adsorption ability, extensive catalytic activity, and high thermodynamic stability, which is of great interest to gas sensing.
APPLIED NANOSCIENCE
(2022)
Article
Chemistry, Analytical
Qingting Li, Wen Zeng, Yanqiong Li
Summary: This article reviews the NO2 gas sensor based on metal oxides. It discusses the hazards of NO2, the disadvantages of chemiresistive sensors based on metal oxides, and different sensitive materials. It also explores NO2 gas sensors based on metal oxides from various aspects such as morphology, preparation, modification, doping, and composite.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Chemistry, Analytical
Elena Lopez-Aymerich, Guillem Domenech-Gil, Mauricio Moreno, Paolo Pellegrino, Albert Romano-Rodriguez
Summary: Active research in nanostructured materials is aimed at improving electronic device characteristics, particularly in the field of gas sensors. Mixing different metal oxides on the same nanowire can broaden the response of gas sensors, resulting in improved performance without compromising miniaturization. This study focuses on the synthesis, characterization, and gas sensing performance of (GaxIn1-x)(2)O-3 nanowires, demonstrating promising results for the development of portable devices.
Article
Chemistry, Physical
C. A. Betty, Sipra Choudhury, Alpa Shah
Summary: Nanocrystalline metal oxide thin films have higher sensitivity for toxic gas sensing at lower temperatures than their bulk counterparts, allowing for the miniaturization of sensors for wearable and portable field trials without sacrificing sensitivity, but with improved selectivity. The properties of nanomaterials, such as size, morphology, geometry, preparation methods, and composition, play a crucial role in the sensor's sensitivity, selectivity, response time, and stability. However, the commercialization of nanostructured materials for toxic gas sensing has been hindered by reliability issues. This review focuses on the advances in room temperature operating sensors and their toxic gas sensing mechanism based on the design of nanostructured metal oxide semiconductors and heterostructures, highlighting their high sensitivity, selectivity, and reliability.
SURFACES AND INTERFACES
(2023)
Review
Materials Science, Ceramics
Chenyang Wang, Yanyan Wang, Zhi Yang, Nantao Hu
Summary: Graphene is considered a promising gas sensing material due to its high specific surface area and good conductivity. Recent studies have shown that graphene-based gas sensors doped with metals, polymers, and metal oxides exhibit good sensitivity, selectivity, and repeatability. Possible improvement methods and common problems characteristic of graphene-based gas sensors are discussed in this review.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Multidisciplinary
Xingtai Chen, Tao Liu, Zhaoru Li, Xi-Tao Yin
Summary: Gas sensors, especially metal oxide semiconductors, have been widely used in various fields, and modification methods such as special structures, doping, and precious metal loading can improve their gas-sensitive performance. This review summarizes the progress in the modification of metal oxides, including their response, selectivity, and operating temperature, and focuses on the gas-sensitive mechanisms. The bottlenecks and future development prospects of current metal oxide semiconductor n-Butanol gas sensors are also discussed.
MATERIALS TODAY CHEMISTRY
(2023)
Article
Chemistry, Analytical
N. Sola-Penaftel, X. Manyosa, E. Navarrete, J. Ramos-Castro, V. Jimenez, S. Bermejo, I. Gracia, E. Llobet, M. Dominguez-Pumar
Summary: The objective of this study is to improve the response time of MOX gas sensors by applying a closed-loop control based on dielectric excitation. This control method implements a feedback loop that keeps the sensor reactance constant by modulating the temperature. The required fast temperature switching is achieved on MEMS microhotplates.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Chemistry, Analytical
Seungpil Oh, Joon-Shik Park, Hoo-Jeong Lee, Hyung Mo Jeong
Summary: In this work, Cu-2(OH)(3)F/CuO hierarchical structures were synthesized and pre-annealed to improve the gas-sensing capability for acetone. The 250°C annealed samples showed the highest response to low concentrations of acetone gas. Characterization techniques were used to analyze the mechanism of pre-annealing of Cu-2(OH)(3)F.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Chemistry, Multidisciplinary
Matteo Tonezzer, Cristina Armellini, Laura Toniutti
Summary: Thermal electronic noses are an important type of sensor in modern applications, capable of distinguishing different gases and volatiles. Research shows that thermal electronic noses based on SnO2 nanowires outperform in detection and classification.
Review
Engineering, Electrical & Electronic
Julaiba Tahsina Mazumder, Ravindra Kumar Jha, Hyoun Woo Kim, Sang Sub Kim
Summary: With the advancement of technology and our pursuit of better living standards, there has been a concerning surge in pollutants from various sources. Detecting toxic gases is crucial for ensuring public health and safety. This article discusses the development of capacitive gas sensors based on metal oxides, composites, and nanostructures, focusing on their sensing ability, performance, and future applications. It also addresses the limitations and potential improvements in terms of stability, sensitivity, response time, and detection in ambient environments.
IEEE SENSORS JOURNAL
(2023)
Review
Chemistry, Inorganic & Nuclear
Chengming Lou, Guanglu Lei, Xianghong Liu, Jiayue Xie, Zishuo Li, Wei Zheng, Neeraj Goel, Mahesh Kumar, Jun Zhang
Summary: Formaldehyde sensors are crucial for indoor air quality monitoring and gas leakage detection in industrial areas. The development of high-performance formaldehyde sensors has been greatly facilitated by the research progress in metal oxide semiconductors (MOS) nanomaterials. This review summarizes the recent advances in formaldehyde sensors utilizing MOS nanostructures, emphasizing the structure-property relationships of various MOS types and discussing optimization strategies for sensor performances. The perspectives and challenges in the future development of formaldehyde sensors are also discussed.
COORDINATION CHEMISTRY REVIEWS
(2022)
Review
Chemistry, Inorganic & Nuclear
Chao Zhang, Kaichun Xu, Kewei Liu, Jinyong Xu, Zichen Zheng
Summary: With the development of economy and society, the detection of carbon dioxide (CO2) has attracted more attention. Metal oxide semiconductor materials have been widely used in CO2 detection due to their various crystal structures, micro-nano morphologies, simple preparation process, and low cost. This article reviews the sensing mechanism and sensitization methods of CO2 gas sensing materials based on metal oxides, and introduces the CO2 sensing properties of chemical resistive sensors based on various metal oxide semiconductors, such as SnO2, ZnO, TiO2, and BaTiO3.
COORDINATION CHEMISTRY REVIEWS
(2022)
Article
Chemistry, Analytical
Ashutosh Sharma, Bharat Sharma
Summary: This study investigates the impact of various geometric patterns of composite MoSi2-SnO2 microheater films on the energy-saving approach for hydrogen gas sensing. It was found that the fin-shaped microheater provides the highest heating temperature and best gas sensing properties. Juxtapositions were made based on the heat and resistance change of the patterns, with the fin-shaped structure showing the most promising results.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Chemistry, Analytical
Hyung Ju Park, Wan-Joong Kim, Hyung-Kun Lee, Dae-Sik Lee, Jong-Ho Shin, Yongseok Jun, Yong Ju Yun
SENSORS AND ACTUATORS B-CHEMICAL
(2018)
Article
Chemistry, Multidisciplinary
Yong Ju Yun, Do Yeob Kim, Won G. Hong, Dong Han Ha, Yongseok Jun, Hyung-Kun Lee
Article
Physics, Multidisciplinary
S. E. Moon, J. H. Kim, J. P. Im, J. Lee, S. Y. Im, S. H. Hong, S. Y. Kang, S. M. Yoon
JOURNAL OF THE KOREAN PHYSICAL SOCIETY
(2018)
Article
Physics, Multidisciplinary
S. E. Moon, J. Kim, S. -M. Lee, J. Lee, J. P. Im, J. H. Kim, S. Y. Im, E. B. Jeon, B. Kwon, H. Kim, J. -S. Kim
JOURNAL OF THE KOREAN PHYSICAL SOCIETY
(2018)
Article
Chemistry, Analytical
Jaewoo Lee, Jong-Pil Im, Jeong-Hun Kim, Sol-Yee Lim, Seung-Eon Moon
Article
Engineering, Electrical & Electronic
Dae-Hong Min, Seung Youl Kang, Seung-Eon Moon, Sung-Min Yoon
IEEE ELECTRON DEVICE LETTERS
(2019)
Article
Chemistry, Analytical
Jae Eun Lee, Do Yeob Kim, Hyung-Kun Lee, Hyung Ju Park, Ahyeon Ma, Sung-Yool Choi, Dae-Sik Lee
SENSORS AND ACTUATORS B-CHEMICAL
(2019)
Article
Chemistry, Analytical
Won Taek Jung, Jun Woo Jeon, Hyun-Seok Jang, Do Yeob Kim, Hyung-Kun Lee, Byung Hoon Kim
SENSORS AND ACTUATORS B-CHEMICAL
(2020)
Article
Chemistry, Analytical
Ahyeon Ma, Hyung Ju Park, Jong Hyeok Seo, Kyu Yeon Jang, Hyung Kun Lee, Do Yeob Kim, Jae Eun Lee, Ki Min Nam, Dae-Sik Lee
SENSORS AND ACTUATORS B-CHEMICAL
(2020)
Article
Polymer Science
Choon-Sang Park, Do Yeob Kim, Eun Young Jung, Hyo Jun Jang, Gyu Tae Bae, Jae Young Kim, Bhum Jae Shin, Hyung-Kun Lee, Heung-Sik Tae
Summary: A novel method for directly depositing nanostructured conducting porous polythiophene films on substrates at room temperature is proposed, showing fast deposition rate and high sensitivity. Comparison between pure and iodine-doped PTh films was conducted to demonstrate the effects of iodine doping, and the NO2-sensing properties of the iodine-doped PTh films-based gas sensors were investigated. The proposed approach allows simultaneous synthesis of sensing materials and fabrication of gas sensors.
Article
Chemistry, Physical
Gyu Tae Bae, Jae Young Kim, Do Yeob Kim, Eun Young Jung, Hyo Jun Jang, Choon-Sang Park, Hyeseung Jang, Dong Ho Lee, Hyung-Kun Lee, Heung-Sik Tae
Summary: The pin-to-liquid DBD reactor utilizes water as a dielectric barrier for stable and effective treatment of aqueous solutions, showing promising performance in decomposing phosphorus compounds. It could be a standard pretreatment method for decomposing phosphorus compounds in water, comparable to thermochemical pretreatment methods.
Article
Polymer Science
Do Yeob Kim, Dong Gyu Kim, Bongjin Jeong, Young Il Kim, Jungseok Heo, Hyung-Kun Lee
Summary: In this paper, a luminescent coordination polymer particle (CPP) that can selectively and sensitively respond to phosphate ions in an aquatic ecosystem is reported. The CPPs, embedded into membranes for reuse, exhibit consistent luminescence signals in different pH ranges. The practical application of the sensor is confirmed by detecting phosphate in actual environmental samples.
Article
Chemistry, Analytical
Dionisio V. Del Orbe, Hyung Ju Park, Myung-Joon Kwack, Hyung-Kun Lee, Do Yeob Kim, Jung Gweon Lim, Inkyu Park, Minji Sohn, Soo Lim, Dae-Sik Lee
Summary: Obesity increases the risk of chronic diseases, and it is important to develop portable devices to monitor exercise-induced fat burn in real time for weight management. In this study, a compact breath analyzer was developed for convenient and noninvasive estimation of fat burning, which showed a high level of accuracy using a machine learning algorithm.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Polymer Science
Bongjin Jeong, Jin Seong Oh, Do Yeob Kim, Dong Gyu Kim, Young Il Kim, Jungseok Heo, Hyung-Kun Lee
Summary: Phosphorus is an important nutrient in aquatic habitats, but it can also inhibit growth in aquatic ecosystems and contribute to environmental issues. Rapid phosphorus detection is of growing interest for water resource management and protection. A new ionophore based on a biomimetic nicotinamide functional group, combined with a silicone rubber ion-selective electrode membrane, showed efficient and selective detection of phosphate ions.
Proceedings Paper
Engineering, Electrical & Electronic
Do Yeob Kim, Young Jae Im, Joho Yun, Choon-Sang Park, Gyu Tae Bae, Heung-Sik Tae, Hyung-Kun Lee
