A model of an optical biosensor detecting environment

Author

Phan, Anthony D. ; Tracy, D.A. ; Viet, N.A.

Author_Institution

Dept. of Phys., Univ. of South Florida, Tampa, FL, USA

fYear

2012

fDate

13-16 Dec. 2012

Firstpage

1

Lastpage

4

Abstract

Heller et. Al. (Science 311, 508 (2006)) demonstrated the first DNA-CN optical sensor by wrapping a piece of double-stranded DNA around the surface of single-walled carbon nanotubes (CN). This new type of optical device can be placed inside living cells and detect trace amounts of harmful contaminants by means of near infrared light. Using a simple exciton theory in nanostructures and the phenomena of B-Z structural phase transition of DNA, we investigate the working principle of this new class of optical biosensor from DNA by using the nanostructure surface as a sensor to detect the property change of DNA as it responds to the presence of target ions. We also propose some new design models by replacing carbon nanotubes with graphene ribbon semiconductors.

Keywords

DNA; biosensors; carbon nanotubes; chemical sensors; excitons; molecular biophysics; molecular configurations; nanosensors; optical sensors; C; DNA B-Z structural phase transition; DNA property changes; DNA-CN optical sensor; double stranded DNA; graphene ribbon semiconductors; harmful contaminants; living cells; nanostructure exciton theory; nanostructure surface; near infrared light; optical biosensor detecting environment; single walled carbon nanotubes; trace amount detection; Biological system modeling; Biosensors; DNA; Dielectric constant; Excitons; Ions; DNA model; biosensor; carbon nanotube; exciton binding energy; graphene nanoribbon;

fLanguage

English

Publisher

ieee

Conference_Titel

Photonics Global Conference (PGC), 2012

Conference_Location

Singapore

Print_ISBN

978-1-4673-2513-4

Type

conf

DOI

10.1109/PGC.2012.6457991

Filename

6457991