3D nanostar dimers with a sub-10-nm gap for single-/few-molecule surface-enhanced raman scattering
Journal article published in 2014 by
Manohar Chirumamilla 
,
Andrea Toma,
Anisha Gopalakrishnan,
Gobind Das,
Remo Proietti Zaccaria,
Remo Proietti Zaccaria,
Roman Krahne,
Eliana Rondanina,
Marco Leoncini,
Carlo Liberale ,
Francesco De De Angelis,
Enzo M. Di Fabrizio
,
Andrea Toma,
Anisha Gopalakrishnan,
Gobind Das,
Remo Proietti Zaccaria,
Remo Proietti Zaccaria,
Roman Krahne,
Eliana Rondanina,
Marco Leoncini,
Carlo Liberale ,
Francesco De De Angelis,
Enzo M. Di Fabrizio
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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. © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.