▎ 摘　　要

A systematic experimental Raman spectroscopic study of twisted bilayer graphene (tBLG) domains localized inside wide-area single layer graphene (SLG) produced by low-pressure CVD on Cu foil and transferred onto SiO2/Si substrate has been performed. According to the Raman characterization the tBLG domains had a great variety of twisting angles theta between the bottom and top graphene layers (6 degrees < theta < 25 degrees). The twisting angle theta was estimated from the spectral position of the rotating R and R' modes in the Raman spectrum. Under G band resonance conditions the breathing mode ZO' with a frequency of 95-97 cm(-1) was detected, and a breathing mode ZO was found in the spectra between 804 cm(-1) and 836 cm(-1), its position depending on the twisting angle theta. An almost linear relationship was found between the frequencies omega(ZO) and omega(R). Also a few other spectral peculiarities were found, e. g. a high-energy excitation of the G band resonance, the 2G overtone appearing at 3170-3180 cm(-1) by the G band resonance, revealing a linear dispersion of 80 cm(-1)/eV of the 2D band in tBLG.