Figure 2
From: Building carbon structures inside hollow carbon spheres
TEM images of (a) HCS, (b) Cu@HCS, (c) Cu@HCS and a carbon helix, growing from both sides of the Cu particle (black spot), (d) Cu particle size distribution in Cu@HCS. (1% Cu in HCSs; 300 °C, 30 mins; Cu reduction @ 400 °C). EDX data collected on Cu@HCS on a Ni grid showing (e) the dark field image (f) the Cu distribution in the HCSs and (g) the energy dispersive spectrum.
