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- Title
Performance improvement of organic field-effect transistor based nitrogen dioxide gas sensor using biocompatible PMMA/silk fibroin bilayer dielectric.
- Authors
Li, Xiaolong; Shi, Wei; Yu, Xinge; Yu, Junsheng
- Abstract
High performance organic field-effect transistors (OFETs) based nitrogen dioxide (NO) gas sensors were fabricated by using biocompatible bilayer dielectric of poly(methyl methacrylate) (PMMA) and silk fibroin (SF). Compared to those sensor devices with single PMMA dielectrics, NO sensing properties of the devices with PMMA/SF bilayer dielectric were significantly improved. By analyzing the electrical characteristics of the OFETs under various concentrations of NO systematically, it was found that the enhancement of the sensing properties of PMMA/SF based OFET-sensors was ascribed to different surface properties between PMMA and SF. The superior sensing performance is owing to the interaction between the hydroxyl and the amidogen of the SF biomaterial and NO molecules at the interface of dielectric/organic layer.
- Subjects
PERFORMANCE of organic field-effect transistors; NITROGEN dioxide; GAS detectors; BIOMEDICAL materials; POLYMETHYLMETHACRYLATE; SILK fibroin; DIELECTRICS
- Publication
Journal of Materials Science: Materials in Electronics, 2015, Vol 26, Issue 10, p7948
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-015-3448-7