Figure 6From: Effect of sulfur on enhancing nitrogen-doping and magnetic properties of carbon nanotubes XRD and Auger depth scanning spectra of CNTs. (a, b) XRD spectra of CNTs produced at different temperatures with and without S: (a) with S, (b) without S; (c, d) Auger depth scanning spectra of CNTs produced at 980°C with and without S: (c) with S, (d) without S.Back to article page