3D nanostar dimers with a sub-10-nm gap for single-/few-molecule surface-enhanced raman scattering

Manohar Chirumamilla, Andrea Toma, Anisha Gopalakrishnan, Gobind Das, Remo Proietti Zaccaria, Roman Krahne, Eliana Rondanina, Marco Leoncini, Carlo Liberale, Francesco De Angelis, Enzo Di Fabrizio

Research output: Contribution to journalArticlepeer-review

273 Scopus citations

Abstract

Plasmonic nanostar-dimers, decoupled from the substrate, have been fabricated by combining electron-beam lithography and reactive-ion etching techniques. The 3D architecture, the sharp tips of the nanostars and the sub-10 nm gap size promote the formation of giant electric-field in highly localized hot-spots. The single/few molecule detection capability of the 3D nanostar-dimers has been demonstrated by Surface-Enhanced Raman Scattering.

Original languageBritish English
Pages (from-to)2353-2358
Number of pages6
JournalAdvanced Materials
Volume26
Issue number15
DOIs
StatePublished - 16 Apr 2014

Keywords

  • electron-beam lithography
  • nanostructures
  • plasmonics
  • single-molecule surface-enhanced Raman scattering
  • sub-10-nm gap

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