2.4. Decyl functionalization of Stöber particles (SP-D)
SP-D particles were prepared using WAY 207024 modified version of Berlier\'s method . In anhydrous toluene (30 mL), prepared SPs (1 g) were added and sonicated for 15 min. This solution was refluxed (∼110 °C) under vigorous mixing and D-TEOS (0.8 mL) was added. This solution was refluxed for 8 h followed by centrifugation to recover the particles. Particles were washed 3 times in ethanol (20 mL) with repeated vortexing and centrifugation followed by drying overnight at 80 °C.
2.5. Materials characterization
2.6. Quercetin adsorption isotherms
2.7. Thermogravimetric analysis (TGA)
TGA was used to determine the quantity of grafted decyl groups on the surface of silica nanoparticles. A TA Instruments (New Castle, DE) Q600 was used under nitrogen flow with approximately 3 mg of sample and a ramp rate 10 °C/min from 30° C to 700° C. Particles were first stabilized at 100 °C for 10 min prior to the ramp to drive off any remaining solvent residue. The mass loss between 435 °C and 700 °C was calculated for SP and SP-D materials individually and the difference in mass loss between these samples was associated with the decomposition of the decyl functional groups.