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      Towards a definition of inorganic nanoparticles from an environmental, health and safety perspective.

      Nature nanotechnology

      Animals, Catalysis, Environment, Health, Inorganic Chemicals, chemistry, Nanoparticles, Safety

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          Abstract

          The regulation of engineered nanoparticles requires a widely agreed definition of such particles. Nanoparticles are routinely defined as particles with sizes between about 1 and 100 nm that show properties that are not found in bulk samples of the same material. Here we argue that evidence for novel size-dependent properties alone, rather than particle size, should be the primary criterion in any definition of nanoparticles when making decisions about their regulation for environmental, health and safety reasons. We review the size-dependent properties of a variety of inorganic nanoparticles and find that particles larger than about 30 nm do not in general show properties that would require regulatory scrutiny beyond that required for their bulk counterparts.

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          Author and article information

          Journal
          19809453
          10.1038/nnano.2009.242

          Chemistry

          Animals, Catalysis, Environment, Health, Inorganic Chemicals, chemistry, Nanoparticles, Safety

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