Use of chemically synthesized ZnO thin film as a liquefied petroleum gas sensor

✍ Scribed by V.R. Shinde; T.P. Gujar; C.D. Lokhande; R.S. Mane; Sung-Hwan Han

• Publisher: Elsevier Science
• Year: 2007
• Tongue: English
• Weight: 352 KB
• Volume: 137
• Category: Article
• ISSN: 0921-5107
• DOI: 10.1016/j.mseb.2006.11.008

✦ Synopsis

Liquefied petroleum gas (LPG) sensing properties of ZnO thin films consisting of sub-micron rods synthesized by chemical bath deposition (CBD) method are presented in depth. The scanning electron microscopy observation reveals that ZnO sub-micron rods are of hexagonal in phase grown perpendicular to the substrate surface. Due to large surface area, the ZnO thin films of sub-micron rods were sensitive to the explosive LPG, which was studied for different time depositions and for different operating temperatures. The maximum response of 28% at 673 K was recorded under the exposure of 10% of lower explosive level (LEL) of LPG. The ZnO thin films of sub-micron rods exhibited good sensitivity and rapid response-recovery characteristics towards LPG.