Typical Raman spectrum of a single layer film Transferred on Glass
Explanation of Raman spectrum
- Raman spectroscopy is used to check the presence of a D peak in graphene samples. If a D peak is present, then this can indicate defects in the sample, such as cracks or flaking.
- The ratio of the heights of the 2D peak and the G peak indicate the number of graphene layers.
2D>G : Single-layer
2D=G : Double layer
2D<G : more than triple layer
- 3 measurements for every sample are taken and presented on the same graph.
Specification of a Quartz Glass
Material : Synthetic Silica Glass
Thickness : 2.0mm +/- 0.1mm (0.0787 inch)
Surface : Optical Polishing (Both side)
Parallelism : 0.1Â°
Military Standard : MIL20-10
Spectral Transmission Factor : 93% (WL:550nm)