What is it about?
Raman spectroscopy is performing as a powerful analytical technique for qualitative and quantitative analysis of graphene and graphene-related compounds. Graphene and graphene-related compounds exhibit intense Raman vibrations. Raman spectroscopic techniques for determination of several graphene layers, and the quality and type of edges, disorders, and functional groups in graphene and graphene-related compounds are of increasing importance. Herein, we review the developments and discuss the future direction and various questions relevant to Raman spectroscopic analysis of graphene and graphene-related compounds.
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Why is it important?
An update of the basic concepts underlying the Raman spectroscopy of graphene is presented and conclusions regarding this matter are provided. The biomedical and physical applications of Raman spectroscopy of graphene are evaluated. The chemical enhancement of the Raman signals and studies of these enhancements are known as Surface enhanced Raman spectroscopy (SERS) and Tip enhanced Raman spectroscopy (TERS). Different mechanisms of achieving chemical enhancement of the Raman signal of the graphene surface and study of these enhancements through Raman spectroscopy are discussed in this critical review illustrating the growth in the use of Raman spectroscopy in graphene research.
Perspectives
Graphene and graphene-derived materials appear to be the simplest materials in the carbon family. There is currently a strong drive to develop new graphene-related materials, taking into account the edges and defects of graphene. More control over the quality of the edges of graphene is expected to be achieved by using Raman spectroscopy. Evaluation of the defects by using Raman spectroscopy is becoming a major area of study in the field of carbon materials. The observation of defects from low concentration to high one is also an interesting study in defect studies. Raman spectroscopy as a powerful technique in the field of carbon materials can be upgraded by varying the parameters such as the voltage and magnetic field. By modifying the magnetic field and voltage, the phonon properties can be modified. The phonon properties include the energy and decay rates. Changing the phonon properties enables the position and width of graphite related materials to be determined. Electronic excitation can be studied by varying the position and width of such materials. Therefore, the overall process of oxidation and reduction related to graphite materials can be studied.
Dr. Sitansu Sekhar Nanda
Myongji University
Read the Original
This page is a summary of: Raman spectrum of graphene with its versatile future perspectives, TrAC Trends in Analytical Chemistry, June 2016, Elsevier,
DOI: 10.1016/j.trac.2016.02.024.
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