Extreme red shifted SERS nanotags

Matthew A. Bedics, Hayleigh Kearns, Jordan M. Cox, Sam Mabbott, Fatima Ali, Neil C. Shand, Karen Faulds, Jason B. Benedict, Duncan Graham, Michael R. Detty

Research output: Contribution to journalArticle

29 Citations (Scopus)
154 Downloads (Pure)

Abstract

Surfaced enhanced Raman scattering (SERS) nanotags operating with 1280 nm excitation were constructed from reporter molecules selected from a library of 14 chalcogenopyrylium dyes containing phenyl, 2-thienyl, and 2-selenophenyl substituents and a surface of hollow gold nanoshells (HGNs). These 1280 SERS nanotags are unique as they have multiple chalcogen atoms available which allow them to adsorb strongly onto the gold surface of the HGN thus producing exceptional SERS signals at this long excitation wavelength. Picomolar limits of detection (LOD) were observed and individual reporters of the library were identified by principal component analysis and classified according to their unique structure and SERS spectra.
Original languageEnglish
Pages (from-to)2302-2306
Number of pages5
JournalChemical Science
Volume6
Issue number4
Early online date21 Jan 2015
DOIs
Publication statusPublished - 1 Apr 2015

Keywords

  • SERS nanotags
  • hollow gold nanoshells
  • limits of detection

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