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2.6 Structure of nanomaterials

Why nano? – fundamental properties

CdS-colloids, different particle sizes

• melting point: structure dominated by small CN (e.g. 9 instead of 12)

• magnetism (increasing spin interactions with decreasing particle size)

• optical properties (example: nano-Au, purple of cassius)

• conductivity (deviations from the Ohm‘s law)

Vision of nano: design of properties by designing the size of objects

„wavefunction engineering“ and not the chemistry of the objects