Figure 7.

SEM images of the fabricated structures. (a) PAN/silica composites with a mixing ratio of 2:1, (b) carbon/silica prepared by carbonization process, (c) macroporous carbon membranes obtained by selective etching of silica, and (d) Raman spectrum of the porous carbon material showing an amorphous carbon structure (ID/IG = 2.2).

Lee et al. Nanoscale Research Letters 2012 7:440   doi:10.1186/1556-276X-7-440
Download authors' original image