Performance improvement of organic field-effect transistor based nitrogen dioxide gas sensor using biocompatible PMMA/silk fibroin bilayer dielectric

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

Detail(s)

Original languageEnglish
Pages (from-to)7948-7954
Journal / PublicationJournal of Materials Science: Materials in Electronics
Volume26
Issue number10
Online published8 Jul 2015
Publication statusPublished - 22 Oct 2015
Externally publishedYes

Abstract

High performance organic field-effect transistors (OFETs) based nitrogen dioxide (NO2) 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, NO2 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 NO2 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 NO2 molecules at the interface of dielectric/organic layer.

Research Area(s)

  • PMMA, Silk Fibroin, Pentacene, Charge Carrier Mobility, Trap Density

Citation Format(s)

Performance improvement of organic field-effect transistor based nitrogen dioxide gas sensor using biocompatible PMMA/silk fibroin bilayer dielectric. / Li, Xiaolong; Shi, Wei; Yu, Xinge; Yu, Junsheng.

In: Journal of Materials Science: Materials in Electronics, Vol. 26, No. 10, 22.10.2015, p. 7948-7954.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review