Lower-Defect Graphene Oxide Nanoribbons from Multiwalled Carbon Nanotubes

Abstract

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 diols 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.

Influences of carbon nanofillers on mechanical performance of epoxy resin polymer

“…Graphene has generated much more interest due to its high specific area and novel mechanical, electrical and thermal properties. (Higginbotham et al 2010;Stankovich et al 2006;Jiao et al 2009;Kosynkin et al 2009;Li et al 2008;Wang et al 2009;Rafiee et al 2010;Han et al 2007) combined high electrical conductivity with record of thermal conductivity and mechanical properties. Used as additives, they can impart their properties to the materials and coatings they are added to.…”

Exposure to Carbon Nanotubes Leads to Changes in the Cellular Biomechanics

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Carbon nanotubes (CNTs) are rolled-up cylindrical structures of single (single-walled carbon nanotube-SWCNT) or multiple (multi-walled carbon nanotube-MWCNT) sheets of graphene that have high aspect ratio, [1] high electrical and thermal conductivity, [2] ultralight weight, [3] and high mechanical strength. [4] Their unique properties provide a tremendous potential for applications in fields as diverse as electronics, [5] aerospace industries, [6] sensors, [7] actuators, [8] or composites.

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CO2 adsorption on crystalline graphitic nanostructures

“…The carbon to oxygen ratio for the graphene (7.32) is quite low when compared to the original MWCNT sample, i.e. the commercial graphene is rich in oxygen functionalities, although the C/O ratio is still quite high compared to that of graphene oxide and graphene oxide nanorribons [24,25]. ratio calculated from the XPS analysis is also included.…”