To test our hypothesis and to see the effect of ΔT and Δtc on the CNT yield and growth kinetics, we performed several growth experiments on the 0.3 nm Co film by varying ΔT from 0 to 340 ºC, and Δtc from 0 to 120 s. Two sets of experiments were performed with different final temperatures (Tf = 680 and 740 ºC). Following each experiment, the in situ growth curves were fitted with a self-exhausting exponential equation of the form 𝐺 = 𝜈𝜏e (() * + , where ν and τ are the maximum growth rate and catalyst lifetime (reaction time constant), respectively. The yield of the experiment was estimated by the maximum G band intensity, 𝐺 -./ = 𝜈𝜏. Figure shows contour plots of the yield, maximum (max.) growth rate and lifetimes plotted against ΔT and Δtc, for Tf = 680 ºC (Figures ) and 740 ºC (Figures ). The contours in Figure were generated by interpolating between the data points (black dots) in OriginPro.