Various ZnO nanostructures, including nanoparticles, nanorods, nanotubes, and nanorings, were synthesized via a controlled synthesis by a facile sonochemical method combined with a chemical etching process. The morphology and structure of the fabricated nanomaterials were characterized by X-ray diffraction, scanning electron microscopy, and transmission electron microscopy. The sensing properties of different ZnO nanostructures toward volatile organic compounds gases at sub-ppm levels were investigated. The differences in the sensing responses of various nanostructures were compared, and reasonable mechanisms are proposed here.
Bibliographical noteFunding Information:
Manuscript received August 1, 2011; revised April 13, 2012; accepted June 28, 2012. Date of publication July 16, 2012; date of current version October 4, 2012. This work was supported by the Converging Research Center Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (2012K001351, 2012K001353). The associate editor coordinating the review of this paper and approving it for publication was Prof. Krishna Persaud.
All Science Journal Classification (ASJC) codes
- Electrical and Electronic Engineering