Fabrication of Ultrafine Carbon Fibers Possessing a Nanoporous Structure from Electrospun Polyvinyl Alcohol Fibers Containing Silica Nanoparticles

Figure 3

STEM images (a and d) and element mapping by EDX spectroscopy of Si (b and e) and Co (c and f) in the fibers before and after NaOH treatment at 80°C for 24 h, respectively.

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