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. 2015 May 11;5:10142. doi: 10.1038/srep10142

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a) Schematic representation of the process of SR-PRET. b) The color images of a typical GNP before (I) and after (II) adding F⁻ ions, demonstrating the recovery of the scattering intensity. c) Scattering spectra intensity before (I) and after (II) the addition of F⁻ ions, the remarkable resonance enhancement on the Rayleigh scattering spectrum is clearly observed.