Figure 1.

Schematic diagram for the process to synthesize a graphitic hollow carbon sphere. (a) Homogenous mixture of silica sphere and Fe-Pc, (b) decomposition of Fe-Pc at 500°C to 600°C, (c) graphitization of carbon shell at 900°C by the catalytic action of Fe nanoparticles, and (d) hollow carbon sphere after HF etching.

Shin et al. Nanoscale Research Letters 2013 8:343   doi:10.1186/1556-276X-8-343
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