Influence of CVD conditions on the growth of carbon microcoils with circular cross-sections

The pyrolysis of C2H2 over a Ni powder catalyst in the atmosphere of H2, H2S and various inert gases was used to synthesize carbon microcoils (CMCs). The influences of the CVD conditions, esp. the gas flow rate of N2, Ar, H2O, or H2 as well as reaction time on the growth of the CMCs, whose coiled fibers have circular cross-sections (circular CMCs), were investigated.