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TEM micrographs of (A-C) NG and (D-F) NG-Ag2. The histograms for particle size distribution are given in (G) NG, (H) NG-Ag2 and (I) Ag NPs in NG-Ag2. The red lines are Gaussian fits. The average particle sizes of NG and NG-Ag2 are 83 ± 13 nm and 90 ± 19 nm, respectively. The average size of Ag NPs is 4.9 ± 1.6 nm.
