Fig. 4

Dependences of the emission current under the influence of concentrated solar radiation on the cathode temperature for the pure CNTs, LaNi5 particles with nanotubes on the surface2, and PTFE with 10 wt% CNTs.
Dependences of the emission current under the influence of concentrated solar radiation on the cathode temperature for the pure CNTs, LaNi5 particles with nanotubes on the surface2, and PTFE with 10 wt% CNTs.