We see two major trends in Particie Technology. First, the focus is shifted from unit operations towards functional products, i.e. towards product engineering. Second, modeling will become more and more important. Proc-esses cannot yet be designed from basie molecular understanding. Nanotechnology, however, begins to bridge this gap between molecules and particles and may thus open new ways not only for the production and handling of particulate matter but also for the engineered design of advanced material properties. Starting from the concept of product engineering we investigate the basie preconditions for tailoring nanoparticulate properties, i.e. the control of the particie in-teractions. Nanotechnology can only be transferred to industrial production if the interactions are effectively controlled.Material and particie properties are essential for predictive models. Although strong tools like MD, DEM or population balance models are available, these models are only predictive if realistic material We see two major trends in Particie Technology. First, the focus is shifted from unit operations towards functional products, ie towards product engineering. Second, modeling will become more and more important. , however, begins to bridge this gap between molecules and particles and may and open new ways not only for the production and handling of particulate matter but also for the engineered design of advanced material properties. Starting from the concept of product engineering we investigate the basie preconditions for tailoring nanoparticulate properties, ie the control of the particie in-teractions. ie the control of the particie in-teractions. Nanotechnology can only be be transferred to industrial production if the interactions are effectively controlled. Material and particie properties are essential for predictive models. balance models are available, these models are only predictive if r ealistic material