Controlled Synthesis of Hollow Hemispheric ZnO Shells/Cages on Graphite Fiber
Figure 1
(a) A typical low-magnification SEM image of the as-grown honeycomb-like ZnO cages covered around the graphite fiber. (b) High-magnification SEM image of the hemispheric ZnO shells/cages with average diameter 2 μm stacked together around the graphite fiber.
