Plasmonic focusing in rod-sheath heteronanostructures

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

Research output: Contribution to journalArticlepeer-review

49 Scopus citations


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.

Original languageEnglish (US)
Pages (from-to)87-92
Number of pages6
JournalACS nano
Issue number1
StatePublished - Jan 2009


  • Electrochemical deposition
  • Heteronanostructure
  • Plasmonics
  • SERS

ASJC Scopus subject areas

  • Materials Science(all)
  • Engineering(all)
  • Physics and Astronomy(all)

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