Outer Tube-Selectively Boron-Doped Double-Walled Carbon Nanotubes for Thermoelectric Applications

We demonstrate the synthesis of double-walled carbon nanotubes (DWNTs) with a selectively boron-doped outer tube via the thermal diffusion method. Such selective boron-doping in the outer tubes alters the electronic properties of the outer tubes while keeping the intrinsic properties of the inner tubes intact, thereby resulting in highly enhanced thermoelectric performance of the DWNTs.