Spray drying is gaining more and more attention as a gentle, single-step, clean, sustainable, continous and scalable drying process which converts liquids (solutions, emulsions, slurries, pastes and melts) into dry powders. In the field of nanotechnology, it opens the possibility to dry particles with controlled size, shape, porosity, density, chemical composition, and compartmentalized design (encapsulation, sea-island, multicore-shell, among other). Spray drying is widely applied in materials, chemical, food and pharmaceutical industries.