Figure 3
From: Building carbon structures inside hollow carbon spheres
CNFs grown in HCSs (a) small Cu particles and short CNFs, (b) small Cu particles and longer CNFs (1% Cu loading, T = 300 °C, C2H2 flow rate 100 mL min for 30 mins). An HCS that contains no Cu particles is shown by *. Some CNFs can be seen growing outside the HCSs; due to Cu particles deposited on the outside of the carbon shell (b).
