Figure 1
From: Effects of NH4F and distilled water on structure of pores in TiO2 nanotube arrays
Top-view SEM images of TiO2 nanotube arrays anodized at 60 V for 1 hour in ethylene glycol containing (a–e) 2, 4, 6, 8, 10 vol% distilled water with 0.2 wt% NH4F and (f–j) 2, 4, 6, 8, 10 vol% distilled water with 0.4 wt% NH4F.
