Effect of ferrocene concentration in a working gas mixture on carbon-nanotube growth parameters

The effect of the ferrocene concentration in a working gas mixture on carbon nanotube (CNT) growth by the CVD method is studied. It is shown that a change in the ferrocene concentration in a gas mixture has a significant effect on CNT growth. A decrease in the ferrocene concentration increases the melt's free energy and leads to the growth of smaller-diameter nanotubes with a lower number of walls, i.e., two or three. An increase in the ferrocene concentration above 1% leads to degradation of the quality of the growing nanotubes. DOI: 10.1134/S1063782612130039