Aerosols are important in engineering of nanoparticles through spray drying, atmospheric science, air pollution, drug delivery to lungs, industrial hygiene, and fuel combustion. A valid mathematical modeling and computer codes for multicomponent droplet evaporation/condensation have been developed for the coupled mass and heat transport moving boundary problem. The simulations demonstrate the evolution of droplet size and the inhomogeneities in compositions and temperature. Aerosol-assisted evaporation-induced self-assembly has been applied to fabricate a wide range of nanoparticle architectures. Nanoporous silica with single crystal NaCl core has been prepared. The simulation proves the formation mechanism. Photo-controlled release is realized by trans/cis isomerization of azobenzene moieties. Ordered core-shell Ce/SiO2 particles are made for corrosion inhibition of aluminum alloys. A strategy is proposed for long term protection. Nano Ag composite, hollow spheres, drug capsules, and...