Fig. 2
SEM images of Pt/TiO2 nanotubes prepared at different current density: a 0.2 mA cm−2, b top view and c cross-sectional view with 0.5 mA cm−2 of current density, d 0.8 mA cm−2 current density
Fig. 2 | Nanoscale Research Letters
SEM images of Pt/TiO2 nanotubes prepared at different current density: a 0.2 mA cm−2, b top view and c cross-sectional view with 0.5 mA cm−2 of current density, d 0.8 mA cm−2 current density