Figure 2
From: Bio-derived three-dimensional hierarchical carbon-graphene-TiO2 as electrode for supercapacitors
SEM micrographs of carbonized loofah fiber: (a) porous structure of carbonized loofah fiber, (b) surface morphology of carbonized loofah fiber, (c) cross-sectional view of carbonized loofah fiber, and (d) oblique section view of carbonized loofah fiber.
