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Nanotechnology has become a key word of public interest, since people realized the social and economic power of nanotechnology development. Nanotechnology has already become part of our daily life, and it will have an as yet unknown technological impact because it concerns all aspects of human life from novel building materials to electronics, cosmetics, pharmaceutics, and medicine. 1 In recent years, engineered nanoparticles started to become the most important components in nanotechnology. The International Organization for Standardization (ISO) has provided specific definitions in their recent document entitled “Nanotechnologies—Terminology and definitions for nanoobjects—Nanoparticle, nanofibre and nanoplate”. As the basis of this review, the following definitions for a nanoparticle (NP) and a nano-object will be used. A nanomaterial is a material with one, two, or three external dimensions in the …