P1.7.13 Highly Sensitive C2H5OH Sensors Using Self-Assembled ZnO Hierarchical Nanostructures
- Event
- 14th International Meeting on Chemical Sensors - IMCS 2012
2012-05-20 - 2012-05-23
Nürnberg/Nuremberg, Germany - Chapter
- P1.7 Nanostructured Metal Oxide-based Sensors
- Author(s)
- K. Kim, H. Kim, H. Kim, K. Choi, J. Lee - Department of Materials Science and Engineering, University of Seoul (Korea)
- Pages
- 1092 - 1095
- DOI
- 10.5162/IMCS2012/P1.7.13
- ISBN
- 978-3-9813484-2-2
- Price
- free
Abstract
Three different morphologies of ZnO nanostructures such as as porous nanorods and two hierarchical structures were prepared by the reaction of mixtures of oleic-acid-dissolved ethanol solutions and aqueous dissolved Znprecursor solutions in the presence of NaOH and their gas sensing characteristics were investigated. Ultra-high responses (Ra/Rg = ~1200, Ra: resistance in air, Rg: resistance in gas) to 100 ppm C2H5OH was achieved using porous nanorods and hierarchical structures assembled from porous nanosheets. Gas sensing characteristics were discussed in relation to size, crystallinity, surface area, morphology, and nano-porosity of nanostructures.