| In this work, a new pH-responsive nanohybrid carrier was prepared with chelating ZnO-dopamine (Zn-d) on the
surface of graphene oxide. Doxorubicin (DOX) as a model drug was loaded on the resulted nanohybrid. The
characteristics of Zn-d-rGO nanohybrid (NH) determined using Fourier transformed infrared spectroscopy (FTIR), X-ray Diffraction spectroscopy (XRD), UV–Visible spectroscopy, Scanning Electron Microscope (SEM), EDX
and AFM. The BET analysis showed a specifc surface area of 37.16 m2/g and the obtained nanohybrid indicated
a high loading capacity of DOX up to 99.7%, and the release profle displayed a pH-dependent discharge in the
acidic environment for14 days. The cytotoxicity of the prepared nanohybrid was measured against T47D and
MCF10A cells and it confrmed that as-prepared nanohybrid has high toxicity against cancer cells and lower
effect against human breast cell. Meanwhile, the prepared nanohybrids showed well antimicrobial activity
against gram-positive and negative bacteria. The obtained results showed that the prepared nanohybrid (Zn-drGO) could potentially be used as a safe carrier for drug delivery systems. |