Recent research activities have been focused the attention on the synthesis of novel nanomaterials obtained by the synergic interaction of nanostructures at different dimensionality and nature in order to obtain nanocomposite systems with advanced performances beyond those of the individual materials. Depending on their spatial organization, nanomaterials can be divided into categories of dimensionality zero (0D), one (1D) and two (2D). Fullerenes, polyynes and cumulenes, carbon nanotubes and graphene are carbon nanomaterials ranging from 0D to 2D that have attracted much attention due to their excellent properties, peculiars of the considered carbon allotrope. Recently studies have been proposed graphene as substrate for Raman enhancement due to the electronic structure of graphene that can promote charge transfer phenomena. In order to explore novel functional nanomaterials, we have produced hybrid carbon structures composed by graphene layers and carbon allotropes at different dimensionality. In comparison with pristine graphene samples, a remarkable change of the graphene electronic and phononic behaviour is observed after the interaction. The combination of carbon materials is realized coupling the mechanical exfoliation with the laser ablation in liquid technique. Raman and SERS spectroscopies together to the Density Functional Theory approach are employed to explain charge transfer phenomena in the produced carbon hybrid, inducing hole-doping in graphene layers.

Study of SERS Chemical Mechanisms using graphene/carbon allotropes hybrid structures

D'URSO, LUISA;FORTE, GIUSEPPE;COMPAGNINI, Giuseppe Romano;
2011-01-01

Abstract

Recent research activities have been focused the attention on the synthesis of novel nanomaterials obtained by the synergic interaction of nanostructures at different dimensionality and nature in order to obtain nanocomposite systems with advanced performances beyond those of the individual materials. Depending on their spatial organization, nanomaterials can be divided into categories of dimensionality zero (0D), one (1D) and two (2D). Fullerenes, polyynes and cumulenes, carbon nanotubes and graphene are carbon nanomaterials ranging from 0D to 2D that have attracted much attention due to their excellent properties, peculiars of the considered carbon allotrope. Recently studies have been proposed graphene as substrate for Raman enhancement due to the electronic structure of graphene that can promote charge transfer phenomena. In order to explore novel functional nanomaterials, we have produced hybrid carbon structures composed by graphene layers and carbon allotropes at different dimensionality. In comparison with pristine graphene samples, a remarkable change of the graphene electronic and phononic behaviour is observed after the interaction. The combination of carbon materials is realized coupling the mechanical exfoliation with the laser ablation in liquid technique. Raman and SERS spectroscopies together to the Density Functional Theory approach are employed to explain charge transfer phenomena in the produced carbon hybrid, inducing hole-doping in graphene layers.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.11769/98229
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