Journal
ACS NANO
Volume 3, Issue 1, Pages 87-92Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nn800695u
Keywords
heteronanostructure; electrochemical deposition; SERS; plasmonics
Categories
Funding
- AFOSR
- NSF-NSEC
- DARPA
- NIH Director's Pioneer Award
- NSSEF Fellowship from the Department of Defense
- OFFICE OF THE DIRECTOR, NATIONAL INSTITUTES OF HEALTH [DP1OD000285] Funding Source: NIH RePORTER
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This paper describes the fabrication of plasmonic focusing, free-standing rod-sheath hetero-nanostructures based on electrochemical templated synthesis and selective chemical etching. These hetero-nanostructures take advantage of plasmon interference together with field enhancements due to sharp junction structures to function as stand-alone SERS substrates containing Raman hot spots at the interface of the rod and sheath segments. This result is investigated with empirical and theoretical (discrete dipole approximation, DDA) methods, and we show how plasmon interference can be tuned by varying the sheath and rod lengths.
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