Resistivity reduction of boron-doped multi-walled carbon nanotubes synthesized from a methanol solution containing a boric acid

TL;DR

This study demonstrates that boron doping in multi-walled carbon nanotubes, synthesized from a methanol-boric acid solution, effectively reduces their electrical resistivity, with precise measurements confirming the doping effect.

Contribution

It introduces a novel synthesis method for boron-doped MWNTs and provides accurate resistivity measurements at the individual nanotube level.

Findings

Boron doping decreases MWNT resistivity.

Four-point contact method enables precise resistivity measurement.

Boron acts as a conduction carrier in MWNTs.

Abstract

Boron-doped multi-walled carbon nanotubes (MWNTs) were synthesized using a methanol solution of boric acid as a source material. Accurate measurements of the electrical resistivity of an individual boron-doped MWNT was performed with a four-point contact, which was fabricated using an electron beam lithography technique. The doped boron provides conduction carriers, which reduces the resistivity of the MWNT.