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Representative nanoparticle from (a) Opt1 batch and (b) Opt2 batch (white bars: 10 nm). TEM micrographs and corresponding size distributions of the as-synthesized samples from the Opt3 batch: (c) Opt3-23, (d) Opt3-29, (e) Opt3-33, and (f) Opt3-37. Large scale bars: 100 nm. Zoomed-in scale bars: 10 nm. The TEM analysis of Opt1 and Opt2 batches can be found in refs (27, 29), respectively.
