Caracterización de nanocomposites de óxido de grafeno y polimetilmetacrilato mediante espectroscopía Raman

Abstract

[ESP]La espectroscopía Raman es una técnica relativamente nueva que ofrece numerosas ventajas en el análisis químico y estructural de las redes moleculares de cualquier material. En este trabajo se presenta una descripción de esta técnica y se establece una metodología detallada, para poder caracterizar de forma reproducible, nanocomposites de polimetilmetacrilato (PMMA) con óxido de grafeno (GO). Esta metodología se aplica para conseguir unos resultados precisos, relacionando parámetros obtenidos de los espectros Raman con características estructurales del material, y realizando una comparación con referencias bibliográficas. Palabras clave: PMMA, espectroscopía Raman, bandas Raman, GO, nanocomposites [ENG]During the last years, Raman technique as a vibrational molecular spectroscopy, has raised interest in several areas due to the possibility of evaluating the distribution of the chemical compounds and the determination of the molecular structure, based on their spectra. In this paper a brief description of the major Raman bands of Graphene and Graphene oxide (GO) is presented first, and then, the characteristic features, namely the intensity and position of the D, G and 2D bands, and the ratios between them are investigated and compared for the GO in different kind of nanocomposites based on PMMA polymer. The importance of the spectra acquisition parameters are also referred and an optimal working methodology has been settled. Keywords: PMMA, Raman spectroscopy, Raman bands, GO, nanocomposites