Porous carbon materials, especially those containing nanopores, micropores or mespores, are being used in various applications such as super capacitors, specific adsorbents and catalyst supports. More recently a kind of glassy carbon has been used as a preform for the reaction forming of structural ceramics. Several structures prepared by different method are shown in Fig. 11.21 (Wang et al. 2003).
Fig. 11.20: TEM views of two opposite helical fibers
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