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Hot‐Spot Engineering in 3D Multi‐Branched Nanostructures: Ultrasensitive Substrates for Surface‐Enhanced Raman Spectroscopy
Author(s) -
Chirumamilla Manohar,
Chirumamilla Anisha,
Roberts Alexander S.,
Zaccaria Remo Proietti,
De Angelis Francesco,
Kjær Kristensen Peter,
Krahne Roman,
Bozhevolnyi Sergey I.,
Pedersen Kjeld,
Toma Andrea
Publication year - 2017
Publication title -
advanced optical materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.89
H-Index - 91
ISSN - 2195-1071
DOI - 10.1002/adom.201600836
Subject(s) - materials science , nanostructure , nanotechnology , surface enhanced raman spectroscopy , plasmon , hot spot (computer programming) , raman spectroscopy , fabrication , nanolithography , electric field , optoelectronics , raman scattering , optics , computer science , medicine , physics , alternative medicine , quantum mechanics , operating system , pathology
The detection of probe molecules at ultralow concentrations, even at the single‐molecule level, can be addressed with the breakthrough concept of plasmonic hot‐spot engineering. In view of that, the fabrication of nanostructures endowed with sub‐10 nm gaps and extremely large near‐field enhancement has gained increasing attention, becoming a key‐condition for improved sensitivity. The present work demonstrates a new perspective in ultrasensitive detection by engineering every individual plasmonic nanostructure with a giant electric field confinement and superior hot‐spot densities, thus eliminating the need for extremely narrow interparticle separations.