Humidity sensor-based zno/sno2 nanocomposite synthesised by sol-gel immersion method

• Published in: International Journal of Materials Engineering Innovation
• Main Author: Sin N.D.M.; Malek M.F.; Mamat M.H.; Mahmood M.R.B.
• Format: Article
• Language: English
• Published: Inderscience Publishers 2014
• Online Access: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84903365457&doi=10.1504%2fIJMATEI.2014.060343&partnerID=40&md5=6858975bf6bb0def2b404e512ab0b2ce

ZnO/SnO2 nanocomposite was successfully prepared using sol-gel immersion method. The structural properties of ZnO/SnO2 nanocomposite were characterised using field emission scanning electron microscopy (FESEM), energy dispersive X-ray spectroscopy (EDX) and X-ray diffraction. The optical properties was analysed by photoluminescence (PL). The sensing properties were measured using two point probe current-voltage (I-V) measurement. The sensor characteristics depend on the composition and surface morphology of the thin film. The sensor with ZnO/SnO2 nanocomposite performed the high sensitivity with 69 times from ratio of R40RH% to R90RH% at 25°C. The response and recovery times of ZnO/SnO2 nanocomposite was 290 s and 15 s respectively. The ZnO/SnO2 nanocomposite found to be good repeatability and reproducibility. The humidity sensing mechanism was summarised. Copyright © 2014 Inderscience Enterprises Ltd.