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. 2023 Jul 18;14(7):375. doi: 10.3390/jfb14070375

Table 2.

Morphological parameters of 1G [10], 2G, and 3G [13] ONTs produced on the Ti-13Nb-13Zr alloy via anodization.

Electrolyte Anodization
Parameters
ONT Internal Diameter
(nm)
ONT Outer
Diameter
(nm)
ONTs Length (μm)
0.5% HF E = 20 V, t = 120 min 71(7) 87(10) 0.94(9)
1M (NH4)2SO4
+2% NH4F
E = 20 V, t = 120 min 61(6) 103(10) 3.9(4)
1M C2H6O2
+4% NH4F
E = 50 V, t = 80 min 169(17) 342(34) 9.7(9)