An Alcohol-Free SiO2 Sol-Gel Matrix Functionalized with Acetic Acid as Drug Reservoir for the Controlled Release of Pentoxifylline
Figure 4
Scanning electron microscopy images of the samples. Particles bigger than 20 μm correspond to pentoxifylline (a), while inclusion of the drug in the functionalized SiO2 modifies the surface morphology and size (b). For SiO2 aggregates of different sizes were observed (c).
