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Definitions
Nano-objects (particles, fibers, plates, tubes,...) are entities with at least one dimension is smaller than 100 nanometers. These entities are the basis for the formation of nano-structured materials on the surface or in volume. They are passive or active as nanodevices. This website deals the risks associated with nanomaterials without covering the wider field of nanotechnologies.
Cartoons Episode 1
TEM (“Transmission Electron Microscopy”) image of synthesized Ag-Cu nanoparticles [J. Sopousek et al., Journal of Nanomaterials 2014 (2014)].
Over a thousand types of nanoparticles, wires or tubes are already marketed. Their possible toxicity will depends on their shape, their dimension, their concentration, their chemical composition, the methods and environment of their implementation.