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Issue 4, 2015
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Extreme red shifted SERS nanotags

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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.

Graphical abstract: Extreme red shifted SERS nanotags

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Publication details

The article was received on 17 Dec 2014, accepted on 20 Jan 2015 and first published on 21 Jan 2015


Article type: Edge Article
DOI: 10.1039/C4SC03917C
Citation: Chem. Sci., 2015,6, 2302-2306
  • Open access: Creative Commons BY license
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    Extreme red shifted SERS nanotags

    M. A. Bedics, H. Kearns, J. M. Cox, S. Mabbott, F. Ali, N. C. Shand, K. Faulds, J. B. Benedict, D. Graham and M. R. Detty, Chem. Sci., 2015, 6, 2302
    DOI: 10.1039/C4SC03917C

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