Síntesis verde de puntos cuánticos de óxido de grafeno
Resumen
The development of carbon-based nanomaterials with biotechnological applications is a key area in materials science and human health. Graphene oxide quantum dots (GOQDs) have emerged as promising nanomaterials due to their unique properties, including quantum confinement, fluorescence, and biocompatibility. In this study, GOQDs were synthesized via a green synthesis approach using organic waste as carbon sources.
X-ray diffraction (XRD) confirmed the presence of graphitic crystallographic planes, while Raman spectroscopy revealed D and G bands indicative of graphitic oxide structures. UV-Vis spectroscopy showed characteristic p-p* and n-p* electronic transitions, and FTIR analysis identified vibrational modes associated with C=C and C–OH functional groups. Fluorescence spectra exhibited a blue emission centered at 2.82 eV. Transmission electron microscopy (TEM) revealed a particle size of approximately 5 nm and an interplanar spacing of 2.45 Å.
The structural, electronic, and optical characteristics of the synthesized GOQDs highlight their potential as fluorescent biomarkers for pathogen detection systems, offering a sustainable and effective platform for advanced diagnostics.