Fig. 2From: Improved in vitro angiogenic behavior on anodized titanium dioxide nanotubesSurface characterization of the acid-etched rough Ti6Al4V surface. a FE-SEM micrograph illustrating a low magnification view of the rough material; b high magnification of the etched surface showing irregular patterns of valley-peaks with stretch marks; and c AFM micrograph representing the rougher and asymmetrical surfaceBack to article page