Hierarchically assembled tin-doped zinc oxide nanorods using low-temperature immersion route for low temperature ethanol sensing

• Published in: Journal of Materials Science: Materials in Electronics
• Main Author: Mohamed R.; Mamat M.H.; Ismail A.S.; Malek M.F.; Zoolfakar A.S.; Khusaimi Z.; Suriani A.B.; Mohamed A.; Ahmad M.K.; Rusop M.
• Format: Article
• Language: English
• Published: Springer New York LLC 2017
• Online Access: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85025149519&doi=10.1007%2fs10854-017-7535-9&partnerID=40&md5=d64ee6c00dc85b63b42c4bfc05295e4b

Tin-doped zinc oxide nanorods (Sn:ZnO NRs) were prepared on magnesium (Mg)–aluminum (Al) co-doped ZnO seeded layer-coated glass substrate using low-temperature solution immersion for ethanol gas sensor applications. The crystallite size, diameter size, and thickness of Sn:ZnO NRs were found to be 46, 84, and 480 nm, respectively; these values were smaller than the values of those of undoped ZnO nanorods (ZnO NRs). Sn:ZnO NRs exhibited a hexagonal-shape structure with c-axis orientation. Sn:ZnO NRs also presented compressive strain and tensile stress with values of −1.61% and 3.75 GPa, respectively. The ethanol gas sensor based on Sn:ZnO NRs obtained a response of 3.8 and response/recovery times of 75 s/53 s to ethanol gas (240 ppm) at 100 °C; thus, Sn:ZnO NRs produced better sensing performance than ZnO NRs. Results demonstrate that Sn:ZnO NRs are very promising in fabricating ethanol gas sensors with high response at low operating temperature. © 2017, Springer Science+Business Media, LLC.