Type

Journal Article

Authors

Ronan James Smith
Jonathan Coleman
Georg Duesberg
Christian Wirtz

Subjects

Chemistry

Topics
polymer science transition electron microscopy raman spectroscopy graphene separation size exclusion chromatography nanoscience materials defects

Lateral Size Selection of Surfactant-Stabilised Graphene Flakes using Size Exclusion Chromatography (2012)

Abstract Aqueous dispersions of graphene, stabilised by a surfactant, have been separated according to lateral flake size using size exclusion chromatography. Transition electron microscopy was used to characterise the flake size as a function of fraction number. While the stock dispersion had a mean lateral flake size of 0.6 ?m, the separated fractions displayed clear size separation, with the second and fourteenth fractions displaying mean sizes of ~1.2 and ~0.5 microns respectively. Raman spectroscopy shows the flake D:G intensity ratio to scale inversely with the flake size indicating that any defects present are associated with flake edges rather than basal plane defects.
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Full list of authors on original publication

Ronan James Smith, Jonathan Coleman, Georg Duesberg, Christian Wirtz

Experts in our system

1
Ronan J Smith
Trinity College Dublin
Total Publications: 11
 
2
Jonathan Coleman
Trinity College Dublin
Total Publications: 217
 
3
Georg Duesberg
Trinity College Dublin
Total Publications: 116