Raman Spectroscopy Characterization of Graphene & Graphene Oxide
Raman Spectroscopy is the best technique for the qualitative analysis of the Graphene.
Single, Double, Few & Multi Layer Graphene can be determined by the: Peak Position, Peak Intensity and Peak Broadening of the Raman Spectra. Ideal Raman Spectra for Graphene is given below:
NUMBER OF LAYERS CALCULATOR:
There are mainly these THREE methods, which can be used to calculate the number of layers in Graphene by Raman Spectroscopy:
Method1: G Band Position in Raman Spectra; Method 2: Intensity Ratio of 2D:G Peak in Raman Spectra; Method 3: Intensity Ratio of D:G Peak in Raman Spectra
THEORY BEHIND CALCULATIONS:
FOR METHOD1: Calculations are based on the following relation (532nm LASER):
wG = 1581.6 + 11/(1 + n^1.6)
Where wG = G Band Position in Raman Spectra; n = Number of layers
FOR METHOD2: (Most Reliable) Calculations are based on the Literature Surveys done regarding the Intensity ratio of 2D:G peak in Raman Spectra.
FOR METHOD3: Calculations are based on the Literature Surveys done regarding the Intensity ratio of D:G peak in Raman Spectra.