Abstract:
Optical transmittance of exfoliated multilayer graphene (MLG) was investigated and cross-referenced
with a standard monolayer sample. Plots of grayscale values against position on the images were
found to have step-like profiles. Step heights were extracted from the profiles and found to have peak
points. The peaks occur at approximately 80 layers region. These findings occur due to interlayer
interactions within the samples, with the
80
layers being the transition from MLG to the bulk
graphite. Our experimental results show optical transmittance of
%3.97
,
%2.95
%2.93
and
%3.91
for single layer, bilayer, trilayer and tetralayer respectively. The observed exponential
decrease in transmittance with the number of graphene layers has been attributed to the variations in
optical absorption of the incident light by the MLG samples.
