P.L. Edmiston “Swellable, Nanoporous Organosilica for Extended and Triggered Release.” Cosmetics and Toiletries: Applied Science 128 (10): 754-763, (2013).
Nanoporous organosilica particles were developed to swell upon the addition of organic solvents. These are evaluated here for encapsulating and controlling the release of fragrance. Slower, continuous release was observed, suggesting their ability to extend sensory benefits. In addition, the stimulated release of encapsulated lidocaine was studied, and results implicate their use to deliver cosmetic actives.