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Micro, Volume 4, Issue 3 (September 2024) – 1 article

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11 pages, 5666 KiB  
Article
Preparation of Antimony Tin Oxide Thin Film Using Green Synthesized Nanoparticles by E-Beam Technique for NO2 Gas Sensing
by Chaitra Chandraiah, Hullekere Mahadevaiah Kalpana, Challaghatta Muniyappa Ananda and Madhusudan B. Kulkarni
Micro 2024, 4(3), 401-411; https://doi.org/10.3390/micro4030025 - 21 Jun 2024
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Abstract
This work delves into the preparation of ATO thin films and their characterization, fabrication, and calibration of a NO2 gas sensor, as well as the development of the packaged sensor. ATO thin films were prepared by e-beam evaporation using green synthesized ATO [...] Read more.
This work delves into the preparation of ATO thin films and their characterization, fabrication, and calibration of a NO2 gas sensor, as well as the development of the packaged sensor. ATO thin films were prepared by e-beam evaporation using green synthesized ATO nanomaterials on different substrates and annealed at 500 and 600 °C for one hour. The structural and morphological properties of the developed thin films were studied using scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X-ray diffraction (XRD) techniques. An orthorhombic SnO2 crystal structure was recognized through XRD analysis. The granular-shaped nanoparticles were revealed through SEM and TEM images. The films annealed at 600 °C exhibited improved crystallinity. ATO films prepared on normal 5 µm interdigitated electrodes (IDEs) and annealed at 600 °C exhibited a response of 10.31 ± 0.25 with an optimum temperature of 200 °C for a 4.8 ppm NO2 gas concentration. The packaged NO2 gas sensor developed using IDEs with a microheater demonstrated an improved response of 16.20 ± 0.25 for 4.8 ppm of NO2 gas. Full article
(This article belongs to the Special Issue Advances in Micro- and Nanomaterials: Synthesis and Applications)
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