NPs dividing lines

Nanoparticles feature size (nm) at which changes may be expected :

Catalytic activity  <5 nm

Making hard magnetic materials soft <20

Producing refractive index changes  <50

Producing super paprmagnetism and others  <100

Electromagnetic phenomena

Producing strengthening and toughening  <100

Modifying hardness and plasticity     <100

Source: Camargo P H, Satyanarayana K G, Wypych F, Nanocomposites: senthesis, structure, properties, and new application opportunities, Materials Research, Vol 12, No 1, Sao Carls, (2009)

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