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. 2019 Feb 18;9(2):282. doi: 10.3390/nano9020282

Figure 6.

Figure 6

(a) AFM image (scan area 2 µm × 2 µm) of the GQD sample. (b) AFM image (scan area 2 µm × 2 µm) of the GQD-PEG-BFG@Pyr-RF sample.