articleLA Referencia (Red Federada de Repositorios Institucionales de Publicaciones Científicas)Jan 1, 2015Closed access

Mid-Infrared Plasmonic Biosensing with Graphene

RDRodrigo, DanielLOLimaj, OdetaJDJanner, DavideEDEtezadi, DordanehGDGarcía de Abajo, Francisco Javier

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

916
total citations
FWCI
74.36
Percentile
100%
References
29
Citations per year

Authors

7
  • RD
    Rodrigo, Daniel
  • LO
    Limaj, Odeta
  • JD
    Janner, Davide
  • ED
    Etezadi, Dordaneh
  • GD
    García de Abajo, Francisco Javier

Topics & keywords

Topics
Keywords
  • Graphene
  • Biosensor
  • Infrared
  • Plasmon
  • Nanotechnology
  • Materials science
  • Optoelectronics
  • Optics
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