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3D Nanostar Dimers with a Sub‐10‐nm Gap for Single‐/Few‐Molecule Surface‐Enhanced Raman Scattering
Author(s) -
Chirumamilla Manohar,
Toma Andrea,
Gopalakrishnan Anisha,
Das Gobind,
Zaccaria Remo Proietti,
Krahne Roman,
Rondanina Eliana,
Leoncini Marco,
Liberale Carlo,
De Angelis Francesco,
Di Fabrizio Enzo
Publication year - 2014
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201304553
Subject(s) - raman scattering , materials science , lithography , scattering , nanotechnology , plasmon , substrate (aquarium) , raman spectroscopy , electron beam lithography , molecule , etching (microfabrication) , optoelectronics , optics , resist , chemistry , layer (electronics) , physics , oceanography , organic chemistry , geology
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.