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Conformation Transition of Single-Layer Graphene and Its Raman Spectroscopy

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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 °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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Document Type: Research Article

Publication date: 2010-11-01

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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