Raman spectroscopy of graphene on different substrates and influence of defects
By A. Das, B. Chakraborty, A. Sood. 2007
624 citations recorded by the source corpus.
We show the evolution of Raman spectra with a number of graphene layers on different substrates, SiO2/Si and conducting indium tin oxide (ITO) plate. The G mode peak position and the intensity ratio of G and 2D bands depend on the preparation of sample for the same number of graphene layers. The 2D Raman band has characteristic line shapes in single and bilayer graphene, capturing the differences in their electronic structure. The defects have a significant influence on the G band peak position for the single layer graphene: the frequency shows a blue shift up to 12 cm−1 depending on the intensity of the D Raman band, which is a marker of the defect density. Most surprisingly, Raman spectra of graphene on the conducting ITO plates show a lowering of the G mode frequency by ∼ 6 cm−1 and the 2D band frequency by ∼ 20 cm−1. This red-shift of the G and 2D bands is observed for the first time in single layer graphene.
Subfields: Atomic and Molecular Physics, and Optics, Materials Chemistry
View Paper: https://www.semanticscholar.org/paper/685bccbeebade5e7553b76aaccef0e551c922776
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In Atomic and Molecular Physics, and Optics
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Citations in the corpus
- Carbon nanotube toughened hydroxyapatite by spark plasma sintering: Microstructural evolution and multiscale tribological properties (2010, background): “on shift of the G peak to higher wave number with an increase in the defect density in graphite [60].”
- Carbon nanotubes induce growth enhancement of tobacco cells. (2012, background): “The G band corresponds to the sp(2)stretching modes both in ring and chains for the graphitic structures and represents the E2g mode at the center of the Brillouin zone.(14,15) The presence and relative intensity of the G band (1581 cm (1)) was associated with the existence of the MWCNTs(16) in the ”