Published January 30, 2017
| Version v1
Journal article
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Hot-spot Engineering in 3D Multi-branched Nanostructures: Ultrasensitive Substrates for Surface Enhanced Raman Spectroscopy
Creators
- 1. Department of Physics and Nanotechnology, University of Aalborg, Skjernvej 4A, Aalborg, 9220, Denmark.
- 2. Istituto Italiano di Tecnologia, Via Morego 30, Genova, 16163, Italy.
- 3. Institute of Technology & Innovation, University of Southern Denmark, Niels Bohrs Allé 1, Odense, 5230, Denmark.
- 4. Istituto Italiano di Tecnologia, Via Morego 30, Genova, 16163, Italy
Description
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 inter-particle separations.
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- Journal article: 10.1002/adom.201600836 (DOI)