کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1786541 | 1023418 | 2012 | 6 صفحه PDF | دانلود رایگان |
Suitable morphology for fast electron transportation is a crucial requirement for the fabrication of gas sensor application. Highly oriented and well defined zinc oxide (ZnO) nano/micro-scale structures are grown on the glass substrates using aqueous chemical route. The grown nanostructures have been characterized by X-ray diffraction pattern (XRD), scanning electron microscope (SEM) and optical absorption techniques. The SEM micrographs revealed the formation of disk, rod, spindle and flower-like morphologies at different pH values ranging from 5 to 10. The grown nanostructures were employed for acetone gas-sensing measurement. It is observed that the sensors based on nanoflowers showed higher response (95%) for acetone gas at 325 °C. The high acetone gas sensitivity of ZnO nanoflowers can be attributed to the surface morphology. Moreover, nanoflower-like structure exhibits the fast response and recovery.
► We synthesized ZnO nanostructures like as nanodisk, nanorods, nanospindles and nanoflowers.
► Relation between pH on the growth ZnO nanostructure and gas sensing is investigated.
► Synthesized nanostructures exhibits higher gas sensitivity for acetone gas.
Journal: Current Applied Physics - Volume 12, Issue 3, May 2012, Pages 778–783