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      Synthesis of nitrogen-doped and amino acid-functionalized graphene quantum dots from glycine, and their application to the fluorometric determination of ferric ion

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          Interpretation of Raman spectra of disordered and amorphous carbon

          Physical Review B, 61(20), 14095-14107
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            Spatially resolved Raman spectroscopy of single- and few-layer graphene.

            We present Raman spectroscopy measurements on single- and few-layer graphene flakes. By using a scanning confocal approach, we collect spectral data with spatial resolution, which allows us to directly compare Raman images with scanning force micrographs. Single-layer graphene can be distinguished from double- and few-layer by the width of the D' line: the single peak for single-layer graphene splits into different peaks for the double-layer. These findings are explained using the double-resonant Raman model based on ab initio calculations of the electronic structure and of the phonon dispersion. We investigate the D line intensity and find no defects within the flake. A finite D line response originating from the edges can be attributed either to defects or to the breakdown of translational symmetry.
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              Large scale electrochemical synthesis of high quality carbon nanodots and their photocatalytic property.

              High quality carbon nanodots (C-dots) with high purity were synthesized through a mild, one-step electrochemical approach, without the assistance of any chemicals but only pure water. This high productivity method makes the synthetic process of C-dots synthesis both economical as well as environment-friendly. The as prepared C-dots are predominantly multi-layer graphene oxide, with luminescence and high up-conversion photoluminescence (emission of light at shorter wavelengths than the excitation wavelength). Meanwhile, C-dots showed peroxidise mimetic function and visible-light-sensitive photocatalytic activity for methyl orange degradation. In addition, a novel photocatalyst (TiO(2)/C-dots) was obtained by combining C-dots with TiO(2) through an easy hydrothermal method. Remarkably, TiO(2)/C-dots exhibited an excellent visible-light photocatalytic activity.
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                Author and article information

                Journal
                Microchimica Acta
                Microchim Acta
                Springer Science and Business Media LLC
                0026-3672
                1436-5073
                February 2015
                October 30 2014
                February 2015
                : 182
                : 3-4
                : 763-770
                Article
                10.1007/s00604-014-1383-6
                4b9c1f21-8dd6-4b89-8734-e796b58e4b6a
                © 2015

                http://www.springer.com/tdm

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