Article
Chemistry, Inorganic & Nuclear
Dinesh Mani, S. Sundar Manoharan, Ganesan Sriram, G. Johnsy Arputhavalli, S. Jebasingh
Summary: Kinematically grown highly oriented hexagonal ZnO nanorods and nanograined films were fabricated on silicon substrates via pulsed laser deposition. The structural, morphological, optical properties, and gas sensing studies of ZnO nanostructured thin film were systematically investigated. The study demonstrated that ZnO nanorods exhibit a greater sensitivity response for the detection of acetaldehyde (CH3CHO) compared to ZnO nanograined films, suggesting their potential as a material for CH3CHO gas detection at room temperature.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Omer Coban, Suleyman Tekmen, Emre Gur, Sebahattin Tuzemen
Summary: In this study, NiO and WO3 oxide semiconductors were prepared on glass substrates using RF Magnetron Sputtering technique and their structural and optical properties were characterized. The optical responses of these semiconductors to hydrogen gas were investigated and it was found that they exhibited different optical absorption changes in the wavelength range of 450-850 nm. Palladium coating significantly improved the response and recovery times of NiO sensors and increased their response to high concentrations of H-2 gas by approximately 150%.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Electrochemistry
Guanglei Tan, Dan Tang, Xiaomin Wang, Lijie He, Tao Mu, Gang Li
Summary: This study successfully prepared NiO thin films and fabricated them into NO2 gas sensors. The results showed that the NiO-10 thin film had a high specific surface area and porous structure, and exhibited the highest optical transmittance in the visible and near-infrared ranges. At 200 degrees C, the NiO-10 thin film sensor demonstrated high sensitivity and stability towards NO2 gas.
INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE
(2022)
Article
Electrochemistry
Hiroaki Aizawa, Kei Negishi, Toru Katsumata
Summary: The thermoelectric hydrogen gas sensor using PCB technique was developed based on the exothermic absorption of H-2 by a palladium film coated on a thermocouple. A cascade connection of two thermocouples composed of copper and constantan was used to detect the exothermic absorption of H-2 by Pd. The differential thermoelectric voltage output between the two thermocouples increased linearly with the H-2 gas concentration in a 2.0-50 vol% ambient atmosphere.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2023)
Article
Physics, Condensed Matter
Idio Alves de Sousa Filho, Jose Fernando Dagnone Figueiredo, Valerie Bouquet, Andre Luiz Menezes de Oliveira, Ronan Lebullenger, Ieda Maria Garcia Santos, Maryline Guilloux-Viry, Odile Merdrignac-Conanec, Ingrid Tavora Weber
Summary: It is important to develop cost-effective, fast-response and portable acetaldehyde sensors to monitor the formation of this highly toxic contaminant. This study evaluated the potential use of ZnGa2O4 and ZnGa2O4:N films as vapor sensors of ethanol containing acetaldehyde. The prepared sensors based on ZnGa2O4 films showed high sensitivity to acetaldehyde, allowing identification of acetaldehyde in ethanol (300 ppm). Results suggest that ZnGaON may be considered a potential candidate for the development of an efficient screening test for a highly sensitive and selective identification of acetaldehyde in beverages, foods, or fuel.
PHYSICA B-CONDENSED MATTER
(2023)
Article
Chemistry, Analytical
Guanglu Lei, Chengming Lou, Xianghong Liu, Jiayue Xie, Zishuo Li, Wei Zheng, Jun Zhang
Summary: Thin film technology, specifically tungsten trioxide (WO3) as a metal oxide semiconductor (MOS) sensing material, shows great promise for gas sensor applications. This review provides an overview of WO3 thin films, their sensing mechanisms, preparation methods, gas sensing performances, and strategies for improving sensor properties. Future perspectives and challenges of WO3 thin film sensors are also discussed.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Chemistry, Physical
Dan Meng, Tongtong Qiao, Guosheng Wang, Yanbai Shen, Xiaoguang San, Yubo Pan, Fanli Meng
Summary: The gas sensor fabricated from NiO-functionalized In2O3 flower-like structures exhibits enhanced detection performance for TMA gas, with high reproducibility, stability, selectivity, and a low detection limit, showcasing a widely applicable strategy for improving the gas sensing properties of metal oxide semiconductors.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Physical
Wenjie Liu, Dandi Wei, Xueying Zhao, Feng Xiao, Chao Yang
Summary: Hierarchical hetero-structures of montmorillonite supported In-doped NiO were constructed and evaluated as gas sensors for volatile organic compounds. The response to xylene was significantly enhanced by In doping, and the sensor demonstrated excellent repeatability and stability.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Analytical
Gregory Kopnov, Sudhansu Sekhar Das, Alexander Gerber
Summary: We investigate the impact of topological inhomogeneity on the response of thin metallic conductometric sensors to external stimuli. The percolation model is extended to consider multiple independent scattering mechanisms contributing to resistivity, with each scattering term predicted to increase and diverge at the percolation threshold. Experimental tests using thin films of hydrogenated palladium and CoPd alloys support the model, showing a linear growth in hydrogen scattering resistivity in the fractal topology range. This enhancement in resistivity response can be beneficial for detecting small changes in bulk material response.
Article
Engineering, Electrical & Electronic
Mariana Chelu, Paul Chesler, Mihai Anastasescu, Cristian Hornoiu, Daiana Mitrea, Irina Atkinson, Costin Brasoveanu, Carmen Moldovan, Gabriel Craciun, Marin Gheorghe, Mariuca Gartner
Summary: With the rapid development of urbanization and industry, the emissions of volatile organic compounds (VOCs) in the atmosphere have increased dramatically, causing a significant impact on human health. Therefore, the development of new and cheap detection devices for VOCs has become a topic of high interest. In this study, ZnO/NiO heterostructures were synthesized for the detection of formaldehyde, which showed promising performance at room temperature.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Chemistry, Physical
Yibing Luo, Beixi An, Jinglong Bai, Yanrong Wang, Xu Cheng, Qiao Wang, Jianpeng Li, Yifan Yang, Zhengkun Wu, Erqing Xie
Summary: The study demonstrated that the co-doping of NiO and PdO on In2O3 nanotubes is an effective way to improve hydrogen sensing characteristics, showing high response, selectivity, and fast response time. The fabricated hydrogen gas sensor has potential applications for the fast and accurate detection of hydrogen.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Engineering, Electrical & Electronic
Zhenyu Yuan, Jingfeng Li, Shan Luo, Haoting Zhang, Fanli Meng
Summary: In this paper, a metal-semiconductor ordered porous film-based n-propanol gas sensor with high sensitivity, fast response, and recovery was prepared using a simple self-assembly method at the gas/liquid interface. The excellent sensing performance of the sensor mainly depends on the special structure of the thin film material and the heterojunction formed by doping with NiO.
IEEE SENSORS JOURNAL
(2022)
Article
Chemistry, Analytical
Surajit Das, Ashok Kumar, Jitendra Singh, Mahesh Kumar
Summary: In this study, a p-NiO/n-SnO2 heterojunction-based formaldehyde (HCHO) sensor was fabricated by decorating the surface of pre-deposited SnO2 thin film with laser-ablated NiO nanoparticles. The gas sensing properties of the sensor were systematically investigated, and it showed a higher response towards 50 ppm HCHO compared to the pristine SnO2 sensor. The study demonstrated that laser ablation methods have great potential as a chemical-free surface decoration route for metal oxide heterojunction-based sensors.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Materials Science, Multidisciplinary
Wei Liu, Ding Gu, Jian-Wei Zhang, Xiao-Gan Li, Marina N. Rumyantseva, Alexander M. Gaskov
Summary: Novel ZnSe/NiO heterostructure nanocomposites were prepared successfully by one-step hydrothermal method. The sensor exhibited high response to NO2 and excellent selectivity to possible interferents, making it suitable for detecting low concentrations of NO2.
Article
Chemistry, Multidisciplinary
Jiacheng Yang, Yingang Gui, Yunfeng Wang, Shasha He
Summary: A resistive sensor based on NiO/Ti3C2Tx sensitive nanocomposites was developed for NH3 detection in a natural environment. The addition of NiO nanoparticles significantly enhanced the gas-sensing response of pure Ti3C2Tx MXene to NH3 at room temperature, and improved the response and recovery time. The sensor also exhibited prospective and high selectivity to volatile organic compounds (VOCs), as well as good repeatability and long-term stability.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2023)
