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. 2016 Jun 2;6:27145. doi: 10.1038/srep27145

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(a) LRTEM and HRTEM images of SNPs. The SNPs are shaped like spheres of about 300 nm average diameter. (b) LRTEM image of GQDs and HRTEM image of a single GQD. The GQDs of ∼12 nm size were used in the FRET system. (c) HRTEM image of a single SNP. (d) HRTEM image of a single SNP coated with GQDs. (e) HRTEM image of GQDs sitting on the surface of a SNP. (f) EELS spectra of a SNP, a GQD, and a SNP/GQDs hybrid in the C and O K-edge regions.