ABSTRACT
Nanotechnology is the science that deals with the interactions that arise at a nanosized, molecular scale. There are several paradigms from nature, such as viruses, DNA, water molecules, and red blood cells, with sizes in the nanometer range. This chapter presents a general overview of the nanoparticles (NPs) and their biointeractions. Figure 1.1 illustrates several cases from nature and pharmaceuticals of components with nanometer dimensions. For many decades, nanotechnology has been used most frequently in the areas of engineering, electronics, and physics, and has shown remarkable developments in these elds. However, pharmaceutical and biomedical areas of application still need to be explored.
