Spray-printed ZnO thin film for high-sensitivity NO2 gas sensing

IF 4 Q2 NANOSCIENCE & NANOTECHNOLOGY

Micro and Nano Systems Letters Pub Date : 2025-06-06 DOI:10.1186/s40486-025-00230-8

Mohamed Ahmed Belal, Sugato Hajra, Swati Panda, Kushal Ruthvik Kaja, Kyeong Jun Park, Hoe Joon Kim

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Abstract

The controlling and precise detection of nitrogen dioxide (NO₂) gas is important in many industrial processes such as medical, petrochemical, and agriculture. Therefore, this study investigates the gas sensing performance of zinc oxide (ZnO) nanosheets prepared using a hydrothermal approach. The morphology and structure of the as-prepared material were analyzed using analysis techniques, including transmission electron microscope (TEM), scanning electron microscope (SEM), X-ray photoelectron spectroscopy (XPS), and X-ray diffraction (XRD). The ZnO ink was spray printed in a square design onto an oxidized silicon wafer substrate, which includes a lithographically designed interdigitated pattern. ZnO nanosheets exhibited superior gas sensing performance, which is 5298% for sensor response and 96 and 600 s for response and recovery times, respectively, at 150 °C and 100 ppm of NO₂ gas. The previous results emphasize applying the proposed spray printing technique in different applications because of straightforward, versatile for different substrates, and cost-effective.

Graphical Abstract

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用于高灵敏度NO2气体传感的喷雾印刷ZnO薄膜

二氧化氮（NO2）气体的控制和精确检测在许多工业过程中都很重要，如医疗、石化和农业。因此，本研究对水热法制备氧化锌纳米片的气敏性能进行了研究。利用透射电子显微镜（TEM）、扫描电子显微镜（SEM）、x射线光电子能谱（XPS）和x射线衍射仪（XRD）等分析技术对制备的材料进行了形貌和结构分析。将ZnO油墨喷印在氧化硅片衬底上，其中包括平版设计的交叉图案。在150°C和100 ppm NO2气体下，ZnO纳米片表现出优异的气敏性能，传感器响应时间为5298%，响应时间为96 s，恢复时间为600 s。先前的结果强调了所提出的喷雾印刷技术在不同应用中的应用，因为它直接，适用于不同的基材，并且具有成本效益。图形抽象

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