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. 2017 May 1;17(5):1000. doi: 10.3390/s17051000

Figure 2.

Figure 2

The growth mechanism of thermal oxidation. (a) Presence of oxygen ions in the atmosphere; (b) Surface reactions between oxygen ions and metallic atoms; (c) Diffusion of oxygen into the metal and nucleation of nanowires; (d) Growth of nanowires and oxidation.