by means of a vibrating orifice aerosol generator (VOAG), a device that produces microdroplets, has been used for the synthesis of non-hollow monodisperse mesoporous silica particles. Particle and pore size as well as mesoscopic order are controllable by varying the experimental conditions, precursor chemistry, and VOAG parameters. (T. L. Ward et al., September 16, Adv. Mater. 2002, 14, 1301-1304)