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. 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

Manohar Chirumamilla  1 , Andrea Toma, Anisha Gopalakrishnan, Gobind Das, Remo Proietti Zaccaria, Roman Krahne, Eliana Rondanina, Marco Leoncini, Carlo Liberale, Francesco De Angelis, Enzo Di Fabrizio
Affiliations

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

Manohar Chirumamilla et al. Adv Mater. .

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.

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