Nanobiotechnology is an emerging field that uses the unique biological properties of nanoparticles for their application in areas such as the environment and medicine. As an illustration, the ability of nanoparticles to cross cellular barriers and their biocompatibility has driven the development of more efficacy and effective medical diagnosis and drug delivery devices. Our group studies the interaction/coating/encapsulation of functional proteins in regenerative and antibacterial processes with un- and modified gold, silver, and polymeric nanoparticles. Moreover, we research the potential use of derivative-silver nanocomposites to develop antiviral materials.