Silver embedded nanostars for SERS with internal reference (SENSIR)


Journal Article

© The Royal Society of Chemistry. We report the synthesis of a unique hybrid nanoplatform consisting of silver-embedded gold nanostars that entraps a reference dye between the gold and silver surfaces, providing an internal reference signal for quantitative surface-enhanced Raman scattering (SERS) analysis without the need for aggregation. The unique geometry of the nanostar provides SERS enhancement in a non-aggregated state for analytes on the exterior surface of the particle. When an equivalent structure was created using gold nanospheres as the core, no SERS signal from the analyte was observed until aggregation was induced by the addition of salt. Rhodamine 6G (Rh6G) was used as a model analyte to demonstrate this proof of concept. The use of the internal standard to reduce SERS signal variability was demonstrated in a highly scattering medium and at various particle concentrations, to simulate conditions that may be encountered with real-world samples. This novel, internal reference containing nanostructure will aid quantitative SERS analysis in complex media.

Full Text

Duke Authors

Cited Authors

  • Fales, AM; Vo-Dinh, T

Published Date

  • July 28, 2015

Published In

Volume / Issue

  • 3 / 28

Start / End Page

  • 7319 - 7324

Electronic International Standard Serial Number (EISSN)

  • 2050-7526

International Standard Serial Number (ISSN)

  • 2050-7534

Digital Object Identifier (DOI)

  • 10.1039/c5tc01296a

Citation Source

  • Scopus