APS March Meeting AbstractsConference publication
Influence of substrates on graphene layers: Raman study
APS March Meeting Abstracts · W26.00006, Pittsburgh, 2009 (2009)
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Introduction
The team used Raman spectra to compare graphene on different substrates and in the presence of adsorbates. The intensity, frequency and width of selected vibrational peaks changed with the chemical environment. The authors discussed these changes in terms of interactions with charge carriers and disorder.
A closer reading
A peak position is only one of the observables in a Raman spectrum. Following intensity and linewidth alongside it gives a richer picture of graphene’s surroundings. A single shift, on its own, cannot distinguish strain, charge transfer and disorder.