Lithography-free fabrication of bistability graphene FET biosensor

Author

You, Xueqiu ; Pak, James Jungho

Author_Institution

Sch. of Electr. Eng., Korea Univ., Seoul, South Korea

fYear

2011

fDate

15-18 Aug. 2011

Firstpage

617

Lastpage

620

Abstract

A novel non-lithographic, contamination-free technique for the fabrication of graphene field effect transistors (GFET) is presented. The GFET was modified with C reactive protein aptamer. Iron nanoparticles were immobilized on the GFET channel surface by using an aptamer-target protein (CRP)-aptamer sandwich method. Bistability signal was obtained by backgate voltage up/down sweeping. The bistability phenomenon caused by the target protein induced NPs adsorption demonstrates a novel high sensitive biosensing method.

Keywords

adsorption; bioelectric potentials; biosensors; graphene; insulated gate field effect transistors; molecular biophysics; nanofabrication; nanoparticles; nanosensors; proteins; C; C reactive protein aptamer; Fe; adsorption; aptamer-target protein-aptamer sandwich method; backgate voltage up-down sweeping; bistability graphene FET biosensor; graphene field effect transistors; iron nanoparticles; lithography-free fabrication; Electrodes; FETs; Films; Nanoparticles; Nickel; Proteins; Substrates;

fLanguage

English

Publisher

ieee

Conference_Titel

Nanotechnology (IEEE-NANO), 2011 11th IEEE Conference on

Conference_Location

Portland, OR

ISSN

1944-9399

Print_ISBN

978-1-4577-1514-3

Electronic_ISBN

1944-9399

Type

conf

DOI

10.1109/NANO.2011.6144386

Filename

6144386