Work

Plasmonic Focusing in Rod−Sheath Heteronanostructures

Year: 2008

Type: article

Abstract: 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.

Source: ACS Nano

DOI: 10.1021/nn800695u

Authors: Xiaodong Chen, Shuzhou Li, Can Xue, Matthew J. Banholzer, George C. Schatz, Chad A. Mirkin

Institutions: Northwestern University, International Institute for Nanotechnology

Language: English

Topic: Gold and Silver Nanoparticles Synthesis and Applications

Subfield: Electronic, Optical and Magnetic Materials

Field: Materials Science

Domain: Physical Sciences

Open Access status: green

Funder: National Institutes of Health

Award: G9000165630