Potential Uses for Nanodimensional Materials

In nanopartides derived from semiconductors, once they are below a critical size, their electronic behaviour is governed by quantum physics (hence quantum dots ). The absorption of light at one wavelength leads to emission at slightly lower en- 

The characteristic wavelength of light at which these interactions occur is governed by the size of the particle. This effect could be exploited in  

Overt and covert anti-counterfeiting features - bank notes, paper documents, casino chips and brand protection, i.e. as replacement for specialty conventional (luminescent and fluorescent) dyes in security applications. 

4 The General Methods Available for the Synthesis of Nanodimensional Materials 17 

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