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Raman spectra of two SERRS nanoparticles of different ‘flavor’. (a) Raman spectrum of SERRS nanoparticle with the resonant Raman reporter IR780 perchlorate. (b) Raman spectrum of SERRS nanoparticle with the resonant Raman reporter IR792 perchlorate. The spectra were obtained from a 10 μl dispersion of 1 nM SERRS nanoparticles on a Raman microscopy system equipped with a 785-nm 300-mW laser operating at 0.05% laser power, 1-s acquisition time, with a 5× objective.
