Design of a highly sensitive and selective C2H5OH sensor using p-type Co3O4 nanofibers
- Authors
- Yoon, Ji-Wook; Choi, Joong-Ki; Lee, Jong-Heun
- Issue Date
- 3-1월-2012
- Publisher
- ELSEVIER SCIENCE SA
- Keywords
- Co3O4 nanofibers; Gas sensor; Electrospinning; p-type; Gas sensing mechanism
- Citation
- SENSORS AND ACTUATORS B-CHEMICAL, v.161, no.1, pp.570 - 577
- Indexed
- SCIE
SCOPUS
- Journal Title
- SENSORS AND ACTUATORS B-CHEMICAL
- Volume
- 161
- Number
- 1
- Start Page
- 570
- End Page
- 577
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/109103
- DOI
- 10.1016/j.snb.2011.11.002
- ISSN
- 0925-4005
- Abstract
- The Co3O4 nanofibers were prepared by electrospinning and their gas sensing characteristics were investigated. The Co3O4 sensors prepared by heat treatment of as-spun precursor fibers at 500 and 600 degrees C showed well-developed one-dimensional morphologies and exhibited high responses to 100 ppm C2H5OH (R-g/R-a = 51.2 and 45.3; R-g, resistance in gas; R-a, resistance in air) at 301 degrees C with negligible cross-responses to 100 ppm CO, C3H8, and H-2 (R-g/R-a = 1.02-2.7). In contrast, the most of one-dimensional morphology of the Co3O4 specimen was lost and the response to 100 ppm C2H5OH became significantly lower when the heat treatment temperature was increased to 700 degrees C or when the nanofibers were ultrasonically disintegrated into primary particles. The significant decrease of the gas response was explained and discussed in relation to the gas sensing mechanism of a p-type semiconductor, the morphology of specimens, and the connecting configuration between nanoparticles and nanofibers. (C) 2011 Elsevier B.V. All rights reserved.
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - College of Engineering > Department of Materials Science and Engineering > 1. Journal Articles
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.