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What are the mechanism face-off?

The nanomaterials evolve during their whole life cycle. It is essential to take into account their evolution in the environment, the various mechanisms which are involved during the critical phases: the dispersion in the air, the propensity to deposit and to agglomerate, the migration and the transformation in water and the ground, the conditions and preferential places of accumulation, the conditions of persistence and degradation, as well as the acute and chronic toxicity of these structures on the flora and the fauna.

Visualization of the mechanism of coagulation kinetics of nanoparticles (10, 30 and 50 nm).

When there is a significant amount of particles, the Brownian motion brings them collide. The phenomenon of coagulation kinetics forms aggregates maintaining particles to each other by forces of attraction (Van der Waals). This leads to an instability of small particles, an overall increase in the size of aggregates associated with a decrease in the concentration of particles in the air.