Figure shows example growth curves obtained from the ARES experiments. There are two isothermal and three non-isothermal growth curves plotted in Figure ; the non-isothermal growths were initiated at different temperatures (Ti = 780, 880 and 920 ºC), but the final temperature (Tf) was set to 680 ºC. For comparison, two growth curves from isothermal experiments done at 680 and 760 ºC are also shown. Figure shows the measured temperature profiles for these experiments in the first 60s of growth. During these experiments, we monitored the cooling rate (defined by the cooling time or Δtc) and the temperature difference (ΔT) between the initial and final temperatures. To illustrate the importance of these two parameters, we show two growth curves with similar ΔT but different Δtc (red and blue curves in Figure and), and two growth curves with similar Δtc but different ΔT (red and green curves in Figure and suggesting that the CNT yield depends on both the cooling rate and the temperature difference.