Graphene-Based FET Detector for E. coli K12 Real-Time Monitoring and Its Theoretical Analysis. (18th May 2016)

• Record Type: Journal Article
• Authors: Zhu, Jieyi; Niu, Fuzhou; Zhu, Changan; Yang, Jie; Xi, Ning
• Other Names: Kalantar-Zadeh Kourosh Academic Editor.
• Is Part Of: Journal of sensors. Volume 2016(2016)
• Publication Date: 2016-05-18
• Subjects: Detectors -- Periodicals; 681.205
• DOI: 10.1155/2016/4641398
• Languages: English
• ISSNs: 1687-725X

Abstract

Abstract : This paper presents a theoretical analysis for a graphene-based FET real-time detector of the target bacteria E. coli K12. The motivation for this study is to design a sensor device for detection of bacteria in food and water in order to guarantee food safety. Graphene is chosen as our material for sensor design, which has outstanding electrical, physical, and optical performance. In our sensor structure, graphene-based solution gate field effect transistor (FET) is the device model; fabrication and functionalization protocol are presented together in this paper. What is more, a real-time signal display system is the accompanied equipment for our designed biosensor device. In this system, the sensor bias current signalI d s would change obviously when the target bacteria are attached to the sensor surface. And the bias currentI d s increases when the E. coli concentration increases. In the latter part, a theoretical interpretation of the sensor signal is to explain the bias currentI d s increasing after the E. coli K12 attachment.