An Underlap Channel-Embedded Field-Effect Transistor for Biosensor Application in Watery and Dry Environment

Author

Kim, Jee-Yeon ; Ahn, Jae-Hyuk ; Choi, Sung-Jin ; Im, Maesoon ; Kim, Sungho ; Duarte, Juan Publo ; Kim, Chang-Hoon ; Park, Tae Jung ; Lee, Sang Yup ; Choi, Yang-Kyu

Author_Institution

Dept. of Electr. Eng., Korea Adv. Inst. of Sci. & Technol., Daejeon, South Korea

Volume

11

Issue

2

fYear

2012

fDate

3/1/2012 12:00:00 AM

Firstpage

390

Lastpage

394

Abstract

An underlap channel-embedded FET is proposed for electrical, label-free biosensor in both watery and dry environments, and current-voltage characteristics measured under each environment are compared. To investigate the effectiveness of the underlap device as a biosensor for both environments, antigen-antibody binding of an avian influenza (AI) is used. Antibody of AI binding on antigen-immobilized surface provides additional negative charge on underlap surface, and they give rise to channel potential increasing and result in drain current reduction. In this study, we have verified that the biosensor characteristics measured under dry environment is valid as much as they are valid for watery environment.

Keywords

biomolecular electronics; biosensors; field effect transistors; microorganisms; antigen-antibody binding; avian influenza; biosensor; channel-embedded field-effect transistor; current-voltage characteristics; dry environment; underlap device; watery environment; Biosensors; Current measurement; Educational institutions; Electrical engineering; Influenza; Logic gates; Nanobioscience; Avian influenza; electrical biosensor; underlap field-effect transistor; watery and dry environment;

fLanguage

English

Journal_Title

Nanotechnology, IEEE Transactions on

Publisher

ieee

ISSN

1536-125X

Type

jour

DOI

10.1109/TNANO.2011.2175006

Filename

6082449