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. 2012 Sep 20;13(9):11941–11953. doi: 10.3390/ijms130911941

Figure 4.

Figure 4

TEM image of colloidal Cu@CuAlO2-Al2O3 nanoparticles at: (a) 80 kGy with average size 12 nm; (b) 100 kGy with average size 6 nm; and (c) 120 kGy with average size 4.5 nm.