Figure 2.

TEM images of the materials.

Notes: (A, C) Pristine SiO₂ NPs and (B, D) SiO₂-G nanohybrids. The surface-loaded gentamicin is marked red with dashed shapes in panel D. Magnifications of 8,000× (A), 60,000× (B), and 10,000× (C, D). (E) The size of the pristine SiO₂ and SiO₂-G nanohybrids analyzed on the obtained TEM, and SEM and TEM images, respectively. The error bars represent the standard errors of the means.

Abbreviations: SEM, scanning electron microscope; SiO₂ NPs, silica nanoparticles; SiO₂-G, silica–gentamicin; TEM, transmission electron microscope.