Portal de Periódicos da CAPES

Highly Conductive Graphene Nanoribbons by Longitudinal Splitting of Carbon Nanotubes Using Potassium Vapor

2011; American Chemical Society; Volume: 5; Issue: 2 Linguagem: Inglês

10.1021/nn102326c

1936-086X

Dmitry V. Kosynkin, Wei Lu, Alexander Sinitskii, Gorka Pera, Zhengzong Sun, James M. Tour,

Advancements in Battery Materials

Here we demonstrate that graphene nanoribbons (GNRs) free of oxidized surfaces can be prepared in large batches and 100% yield by splitting multiwalled carbon nanotubes (MWCNTs) with potassium vapor. If desired, exfoliation is attainable in a subsequent step using chlorosulfonic acid. The low-defect density of these GNRs is indicated by their electrical conductivity, comparable to that of graphene derived from mechanically exfoliated graphite. The possible origins of directionally selective splitting of MWCNTs have been explored using computer modeling, and plausible explanations for the unique role of potassium were found.