Metal-dielectric-CNT nanowires for femtomolar chemical detection by surface enhanced Raman spectroscopy.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 23696098.
- Also identified by DOI 10.1002/adma.201300571.
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Abstract
A highly sensitive substrate for surface enhanced Raman spectroscopy (SERS) is formed by arrays of gold-coated metallic carbon nanotubes having a nanoinsert of high-k dielectric (hafnia) as an energy coupling barrier. Repeated femtomolar detection of 1,2 bis-(4-pyridyl)-ethylene in solution demonstrates the critical contribution of this plasmonic energy coupling barrier to the enhanced chemical sensitivity.
Medical subject headings
- Ethylenes
- Nanotubes, Carbon
- Nanowires
- Pyridines
- Spectrum Analysis, Raman