Graphene Quantum Dots-Fe3O4 Magnetoplasmonic Nanostructure as a Potential Candidate for Biomedical Application

The main purpose of this research is the characterization of the magnetic GQDs nanostructure and investigating its potential in biomedical applications. In this research, graphene quantum dots (GQDs) and Fe3O4 nanoparticles were synthesized via hydrothermal and co-precipitation methods, respectively. In this regard, amino acids were used to bind GQDs to the magnetite nanoparticles (MNPs). X-ray diffraction (XRD) pattern was investigated to confirm the formation of the GQDs-MNPs hybrid nanocomposites. Furthermore, the nanocomposite morphology, shape, and size were demonstrated with scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Thermogravimetric analysis (TGA) was used to calculate the relevant content of cysteine and GQDs in the sample. The synthesized structure's plasmonic and magnetic properties were illustrated by the vibrating sample magnetometer (VSM) and photoluminescence spectrum (PL). Finally, as to investigate the toxicity of the GQDs-MNPs nanocomposite, the MTT analysis was utilized. As a result, this nanocomposite can be used as an MRI contrast agent, cell labeling and tracking, and drug delivery, and hyperthermia.

کلیدواژه ها:

Magnetic nanocomposites ، Fe3O4 nanoparticles ، Graphene quantum dots ، Magnetoplasomonic characteristics ، Biomedical application