The Microstructure and Capacitance Characterizations of Anodic Titanium Based Alloy Oxide Nanotube

Figure 7

Estimation of TiO₂ NT surface: (a) cone structure of inner tube with radius of 𝑅₃, and 𝑅₁, and 𝑅₂ on the tube top and bottom, tube length with 𝐻, (b) pore wall thickness with 𝑇₁ and 𝑇₂ on the tube top and bottom, (c) tube inner surface area, and (d) outer surface area.

(a)

(b)

(c)

(d)