Figure 5
From: Fabrication of Ni-Ti-O nanotube arrays by anodization of NiTi alloy and their potential applications
Surface and cross-sectional FE-SEM images of the Ni-Ti-O NTAs formed at 25 V and 30°C for 1 h in ethylene glycol solution with 1.0 vol% H2O and different NH4F concentrations.
(a) 0.025 wt%, (b) 0.05 wt%, (c) 0.1 wt%, (d) 0.2 wt%, (e) 0.4 wt%, (f) 0.8 wt% and (g) 1.0 wt%. Variation in the diameter and length of the NTs as a function of NH4F concentration (h).
