Bare gold nanoparticles mediated surface-enhanced Raman spectroscopic determination and quantification of carboxylated single-walled carbon nanotubes.

Highlights: [•] c-SWNTs have been determined in spiked river water samples by SERS spectroscopy. [•] Bare AuNPs are microfiltrated on a membrane forming the SERS active substrate. [•] Measured SERS intensity data were closely fit to a Langmuir isotherm. [•] The use of a portable Raman spectrometer enables in situ determination of SWNTs. [•] The limit of detection of the proposed methodology is 10μgL−1. [Copyright &y& Elsevier]