SEARCH Articles Figures Tables Carbon Nanotube double walled Double- wall nanotubes Double- wall nanotubes Double-wall carbon nanotubes Double-wall carbon nanotubes DWCNT) Double-walled carbon nanotube DWCNT) Double-walled carbon nanotubes (DWCNTs Double-walled carbon nanotubes DWNTs) Nitrogen- and Boron-Doped Double-Walled Carbon Nanotubes Production of Double-Walled Carbon Nanotubes