An Alcohol-Free SiO2 Sol-Gel Matrix Functionalized with Acetic Acid as Drug Reservoir for the Controlled Release of Pentoxifylline
Figure 3
Electron dispersive spectroscopy of (a) bare PTX and (b) PTX-acetic acid-SiO2 and (c) SiO2. Elemental composition of particles surface is provided where carbon, nitrogen silicon, and oxygen can be detected.