3D Nanostar Dimers with a Sub-10-nm Gap for Single-/Few-Molecule Surface-Enhanced Raman Scattering (pages 2353–2358)
Manohar Chirumamilla, Andrea Toma, Anisha Gopalakrishnan, Gobind Das, Remo Proietti Zaccaria, Roman Krahne, Eliana Rondanina, Marco Leoncini, Carlo Liberale, Francesco De Angelis and Enzo Di Fabrizio
Article first published online: 22 JAN 2014 | DOI: 10.1002/adma.201304553
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.