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Updated: Jun 6, 2026

Resonance Raman Spectroscopy of Extreme Nanowires and Other 1D Systems
Published on: April 28, 2016
Conformation transition of single-layer graphene and its Raman spectroscopy
Caiyu Qiu1, Haiqing Zhou, Minjiang Chen
1National Center for Nanoscience and Technology, Beijing 100190, China.
Abstract:
In this work, we report conformation transitions of pristine exfoliated graphenes after they are coated with a layer of polymethyl methacrylate and baked at 180 degrees C. Optical microscopes, scanning electron microscope are used to characterize the morphology changes. In the meantime, the characteristics of their Raman spectra are also studied before and after the conformation transition. After the transition, D-phonon mode in the Raman spectroscopy appears; G- and 2D-phonon modes show blue shift as well as broadening. It is suggested that the scrolling and curvature of graphene are responsible for these Raman characteristics. These results indicate the modification of the intrinsic properties of single-layer graphene during the standard device fabrication processes.
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