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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 14 — Jul. 5, 2010
  • pp: 14395–14400

Highly sensitive graphene biosensors based on surface plasmon resonance

L. Wu, H. S. Chu, W. S. Koh, and E. P. Li  »View Author Affiliations

Optics Express, Vol. 18, Issue 14, pp. 14395-14400 (2010)

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A surface plasmon resonance (SPR) based graphene biosensor is presented. It consists of a graphene sheet coated above a gold thin film, which has been proposed and experimentally fabricated recently [ChemPhysChem 11, 585 (2010)]. The biosensor uses attenuated total reflection (ATR) method to detect the refractive index change near the sensor surface, which is due to the adsorption of biomolecules. Our calculations show that the proposed graphene-on-gold SPR biosensor (with L graphene layers) is (1 + 0.025 L) × γ (where γ > 1) times more sensitive than the conventional gold thin film SPR biosensor. The improved sensitivity is due to increased adsorption of biomolecules on graphene (represented by the factor γ) and the optical property of graphene.

© 2010 OSA

OCIS Codes
(240.6680) Optics at surfaces : Surface plasmons
(280.1415) Remote sensing and sensors : Biological sensing and sensors

ToC Category:

Original Manuscript: May 21, 2010
Revised Manuscript: June 15, 2010
Manuscript Accepted: June 15, 2010
Published: June 21, 2010

Virtual Issues
Vol. 5, Iss. 11 Virtual Journal for Biomedical Optics

L. Wu, H. S. Chu, W. S. Koh, and E. P. Li, "Highly sensitive graphene biosensors based on surface plasmon resonance," Opt. Express 18, 14395-14400 (2010)

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