| Abstrak/Abstract |
Surface plasmon resonance (SPR) has found widespread application in detecting biological and chemical analytes, food safety, and medical diagnostics. In this study, magnetite/reduced-graphene oxide nanocomposites (Fe3O4/rGO NCs) were synthesized and characterized for their SPR behavior in the prism/Au/Fe3O4/rGO system using the Kretschmann configuration. X-ray diffraction analysis confirmed that Fe3O4 possesses a face-centered cubic structure, while the incorporation of rGO reduced the crystallite size with increasing concentration. Fourier transform infrared (FTIR) spectroscopy identified functional groups such as C=O, C=C, and Fe-O, verifying the successful formation of Fe3O4/rGO NCs. Furthermore, the SPR resonance angle shifted progressively to higher values with increasing Fe3O4:rGO ratio, indicating an enhanced refractive-index response induced by the rGO content. These results demonstrate that Fe3O4 nanoparticles modified with rGO significantly affect the SPR characteristics, highlighting their potential for use in SPR-based biosensing applications. |
