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Adv Mater. 2014 Apr 16;26(15):2353-8. doi: 10.1002/adma.201304553. Epub 2014 Jan 22.

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

Author information

1
Nanostructures, Istituto Italiano di Tecnologia, via Morego 30, Genova, 16163, Italy.

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.

KEYWORDS:

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

PMID:
24452910
DOI:
10.1002/adma.201304553

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