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. 2019 Mar 22;20(6):1469. doi: 10.3390/ijms20061469

Figure 1.

Figure 1

Surface characteristics of nano-copper: 1-µm copper particles (A) and Nano Cu particles (B). The average particle size of 1-µm copper particles and nano-copper particles is about 1 μm and 80–100 nm, respectively.