Immobilized nanorod assemblies: Fabrication and understanding of large area surface-enhanced Raman spectroscopy substrates

Nathan G. Greeneltch, Martin G. Blaber, Anne Isabelle Henry, George C. Schatz, Richard P. Van Duyne

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Abstract

We describe the fabrication of optimized plasmonic substrates in the form of immobilized nanorod assemblies (INRA) for surface-enhanced Raman spectroscopy (SERS). Included are high-resolution scanning electron micrograph (SEM) images of the surface structures, along with a mechanistic description of their growth. It is shown that, by varying the size of support microspheres, the surface plasmon resonance is tuned between 330 and 1840 nm. Notably, there are predicted optimal microsphere sizes for each of the commonly used SERS laser wavelengths of 532, 633, 785, and 1064 nm.

Original languageEnglish
Pages (from-to)2297-2303
Number of pages7
JournalAnalytical Chemistry
Volume85
Issue number4
DOIs
Publication statusPublished - Feb 19 2013

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ASJC Scopus subject areas

  • Analytical Chemistry

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