Development of paper-gate transistor toward direct detection from microbiological fluids. (24th March 2017)

• Record Type: Journal Article
• Authors: Kajisa, Taira; Sakata, Toshiya
• Is Part Of: Japanese journal of applied physics. Volume 56:Number 4(2017)Supplement
• Publication Date: 2017-03-24
• Subjects: Physics -- Periodicals; 621.05
• DOI: 10.7567/JJAP.56.04CM07
• Languages: English
• ISSNs: 0021-4922

Abstract

Abstract: In this study, a paper-gate transistor was developed to detect glucose using an extended-gate field-effect transistor (FET). A filter paper was used as an extended gate electrode, in which Au nanoparticles (AuNPs) modified with phenylboronic acids (PBAs) were included. PBA–AuNPs play an important role as a support to not only be entrapped in cellulose fibrils but also bind to the targeted glucose in a paper. The surface properties of PBA–AuNPs were investigated to elucidate the electrical properties of the paper-gate electrode using an absorption spectrum and a zeta potential analysis. Moreover, the paper-gate electrode enabled us to detect glucose at the micromolar level on the basis of the principle of FET devices. A platform based on the paper-gate transistor is suitable for a highly sensitive system to detect glucose in trace samples such as tears, sweat, and saliva in the future.