On the charge transfer between single-walled carbon nanotubes and graphene

TL;DR

This study investigates the electronic charge transfer between single-walled carbon nanotubes and graphene, revealing that graphene donates electrons to nanotubes, leading to p-type doping in graphene and n-type doping in SWNTs, using Raman spectroscopy.

Contribution

It provides experimental evidence of charge transfer direction and doping effects between SWNTs and graphene on different substrates.

Findings

Graphene donates electrons to SWNTs on copper and SiO2.

Results show p-type doping in graphene and n-type in SWNTs.

Charge transfer confirmed by Raman spectroscopy.

Abstract

It is important to understand the electronic interaction between single-walled carbon nanotubes (SWNTs) and graphene in order to use them efficiently in multifunctional hybrid devices. Here we deposited SWNT bundles on graphene-covered copper and SiO2 substrates by chemical vapor deposition and investigated the charge transfer between them by Raman spectroscopy. Our results revealed that, on both copper and SiO2 substrates, graphene donates electrons to the SWNTs, resulting in p-type doped graphene and n-type doped SWNTs.