Graphene-Gold Metasurface Architectures for Ultrasensitive Plasmonic Biosensing

Adv Mater. 2015 Oct 28;27(40):6163-9. doi: 10.1002/adma.201501754. Epub 2015 Sep 9.

Abstract

Graphene-gold metasurface architectures that can provide significant gains in plasmonic detection sensitivity for trace-amount target analytes are reported. Benefiting from extreme phase singularities of reflected light induced by strong plasmon-mediated energy confinements, the metasurface demonstrates a much-improved sensitivity to molecular bindings nearby and achieves an ultralow detection limit of 1 × 10(-18) m for 7.3 kDa 24-mer single-stranded DNA.

Keywords: biosensors; metasurfaces; plasmonic sensing; surface plasmon polaritons.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • DNA, Single-Stranded / analysis
  • Electromagnetic Phenomena
  • Gold / chemistry*
  • Graphite / chemistry*
  • Surface Plasmon Resonance*
  • Surface Properties

Substances

  • DNA, Single-Stranded
  • Gold
  • Graphite