Vertically aligned ZnO nanorods and graphene hybrid architectures for high-sensitive flexible gas sensors
- Authors
- Yi, Jaeseok; Lee, Jung Min; Park, Won Il
- Issue Date
- Jul-2011
- Publisher
- ELSEVIER SCIENCE SA
- Keywords
- Gas sensor; ZnO nanorod; Graphene; Nanorod-graphene hybrid architecture; Flexible device; Transparent device
- Citation
- SENSORS AND ACTUATORS B-CHEMICAL, v.155, no.1, pp.264 - 269
- Indexed
- SCIE
SCOPUS
- Journal Title
- SENSORS AND ACTUATORS B-CHEMICAL
- Volume
- 155
- Number
- 1
- Start Page
- 264
- End Page
- 269
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/168090
- DOI
- 10.1016/j.snb.2010.12.033
- ISSN
- 0925-4005
- Abstract
- We present the fabrication and characterization of new type of flexible gas sensors, composed mainly of a bottom ZnO conductive layer on metal foil, vertically aligned ZnO nanorod channel, and graphene-based top conductive electrode. Multiple cycling tests demonstrated the ZnO nanorods (NRs) and graphene (Gr) hybrid architectures accommodated the flexural deformation without mechanical or electrical failure for bending radius below 0.8 cm under the repeated bending and releasing up to 100 times. In addition, the hybrid architectures fabricated on glass substrate showed good optical transmittance larger than similar to 70% for visible light, indicating potential application in transparent devices. Furthermore, our gas sensors demonstrated the ppm level detection of ethanol gas vapor with the sensitivity (resistance in air/resistance in target gas) as high as similar to 9 for 10 ppm ethanol.
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