Journal
ACS NANO
Volume 4, Issue 4, Pages 2059-2069Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nn100118m
Keywords
nanoribbon; graphene; carbon nanotube; unzipping; aqueous dispersions
Categories
Funding
- FAA [2007-G-010]
- AFOSR [FA9550-09-1-0581]
- AFOSR through University Technology Corporation [09-S568-064-01-C1]
- U.S. Department of Energy's Office of Energy Efficiency and RenewableEnergy within the Hydrogen Sorption Center of Excellence [DE-FC-36-05G015073]
- Army Research Office through a SBIR
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An improved method is described for the production of graphene oxide nanoribbons (GONRs) via longitudinal unzipping of multiwalled carbon nanotubes. The method produces GONRs with fewer defects and/or holes on the basal plane, maintains narrow ribbons <100 nm wide, and maximizes the high aspect ratio. Changes in the reaction conditions such as acid content, time, and temperature were investigated. The new, optimized method which introduces a second, weaker acid into the system, improves the selectivity of the oxidative unzipping presumably by in situ protection of the vicinal dials formed on the basal plane of graphene during the oxidation, and thereby prevents their overoxidation and subsequent hole generation. The optimized GONRs exhibit increased electrical conductivity over those chemically reduced nanoribbons produced by previously reported procedures.
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