articleScienceJul 9, 2015GREEN OA

Mid-infrared plasmonic biosensing with graphene

DRDaniel RodrigoOLOdeta LimajDJDavide JannerDEDordaneh EtezadiFJF. Javier García de Abajo

École Polytechnique Fédérale de Lausanne · Institute of Photonic Sciences · +1 more institution

PubMed
Indexed inarxivcrossrefpubmed

Abstract

Infrared spectroscopy is the technique of choice for chemical identification of biomolecules through their vibrational fingerprints. However, infrared light interacts poorly with nanometric-size molecules. We exploit the unique electro-optical properties of graphene to demonstrate a high-sensitivity tunable plasmonic biosensor for chemically specific label-free detection of protein monolayers. The plasmon resonance of nanostructured graphene is dynamically tuned to selectively probe the protein at different frequencies and extract its complex refractive index. Additionally, the extreme spatial light confinement in graphene—up to two orders of magnitude higher than in metals—produces an unprecedentedly high…

Citation impact

1,412
total citations
FWCI
77.63
Percentile
100%
References
24
Citations per year

Authors

7
  • DR
    Daniel Rodrigo

    École Polytechnique Fédérale de Lausanne

  • OL
    Odeta Limaj

    École Polytechnique Fédérale de Lausanne

  • DJ
    Davide Janner

    Institute of Photonic Sciences

  • DE
    Dordaneh Etezadi

    École Polytechnique Fédérale de Lausanne

  • FJ
    F. Javier García de Abajo

    Institució Catalana de Recerca i Estudis Avançats, Institute of Photonic Sciences

Topics & keywords

Topics
Keywords
  • Graphene
  • Plasmon
  • Biosensor
  • Biomolecule
  • Refractive index
  • Surface plasmon resonance
  • Infrared
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