Self-assembled plasmonic nanoring cavity arrays for SERS and LSPR biosensing

Hyungsoon Im, Kyle C. Bantz, Si Hoon Lee, Timothy W. Johnson, Christy L. Haynes, Sang Hyun Oh

Research output: Contribution to journalArticlepeer-review

165 Scopus citations

Abstract

Self-assembled plasmonic nanoring cavity arrays are formed alongside the curvature of highly packed metallic nanosphere gratings. The sub-10-nm gap size is precisely tuned via atomic layer deposition and highly ordered arrays are produced over a cm-sized area. The resulting hybrid nanostructure boosts coupling efficiency of light into plasmons, and shows an improved SERS detection limit. These substrates are used for SERS detection of the biological analyte, adenine, followed by concurrent localized surface plasmon resonance sensing.

Original languageEnglish (US)
Pages (from-to)2678-2685
Number of pages8
JournalAdvanced Materials
Volume25
Issue number19
DOIs
StatePublished - May 21 2013

Keywords

  • adenine
  • atomic layer deposition
  • localized surface plasmon resonance (LSPR)
  • nanogap
  • nanosphere lithography
  • surface-enhanced Raman scattering (SERS)

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