Evan T. Salim, Rana O. Mahdi, Mayyadah H. Mohsin, Iman H. Hadi, Doaa Sulaiman
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Enhanced Gas Sensor Performance of Hydrothermally Synthesized Ag@Cu2O–Si: A Study at Low Temperature with High Sensitivity Approach
This study presents the synthesis of a novel Ag-decorated Cu2O nanocomposite gas sensor using a hydrothermal method for the detection of a nitrogen dioxide (NO2) gas. Cu2O thin films were synthesized through a 48-h hydrothermal process and subsequently decorated with the silver nanoparticles to enhance the sensor performance. The structural, morphological, and optical characterizations confirmed the successful formation of a highly crystalline Cu2O with uniformly distributed Ag nanoparticles. Gas sensing properties were evaluated across different temperatures (100°C, 150°C, and 200°C) and two NO2 gas concentrations (75–125 ppm). Results demonstrated that the Ag@Cu2O–Si sensor exhibited faster response and recovery times, improved stability, and higher sensitivity compared with the bare Cu2O sensors. The optimal sensing temperature was found to be about 100°C with sensitivity of a about 26% at 125 ppm. The enhanced performance is attributed to the synergistic effects of Ag nanoparticles, which improve surface adsorption and charge transfer kinetics. These findings suggest that the hydrothermally synthesized Ag@Cu2O nanocomposite is a promising candidate for real-time low-temperature NO2 detection in both environmental and industrial applications.
期刊介绍：
The Journal of Electronic Materials (JEM) reports monthly on the science and technology of electronic materials, while examining new applications for semiconductors, magnetic alloys, dielectrics, nanoscale materials, and photonic materials. The journal welcomes articles on methods for preparing and evaluating the chemical, physical, electronic, and optical properties of these materials. Specific areas of interest are materials for state-of-the-art transistors, nanotechnology, electronic packaging, detectors, emitters, metallization, superconductivity, and energy applications.
Review papers on current topics enable individuals in the field of electronics to keep abreast of activities in areas peripheral to their own. JEM also selects papers from conferences such as the Electronic Materials Conference, the U.S. Workshop on the Physics and Chemistry of II-VI Materials, and the International Conference on Thermoelectrics. It benefits both specialists and non-specialists in the electronic materials field.
A journal of The Minerals, Metals & Materials Society.
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