Chen, Dong-Meng published the artcile< Variation of graphene Raman G-peak splitting with strain>, Electric Literature of 112-63-0, the main research area is graphene polyaromatic mol Raman peak splitting strain.
Variation of graphene Raman G peak splitting due to uniaxial strain and absorption of polyaromatic moleculars on both sides are studied by fifth-nearest neighbor force-constant model. The calculation results show that symmetry lowering is responsible for the G peak splitting, where G peak splits into G+ and G- peaks by lifting the energy degeneracy of inplane longitudinal and transverse optical phonons at é?point. Under uniaxial strain, the elongation of C-C bonds reduces the force-constant and softens the in-plane optical phonons which induce red shifts of both G+ and G- peaks. The different strains produced by polyaromatic mols. along its long and short edges lead to red shift and blue shift of the two in-plane optical phonons relevant to G- and G+ peaks, which gives a plausible explanation to the different G peak splitting of the recent Raman experiment on graphene with uniaxial strain and graphene sandwiched by the polyaromatic mols.
Wuli Xuebao published new progress about Raman spectra. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Electric Literature of 112-63-0.
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