Recently  the research on obtaining  nanosize materials such as nanowires, nanorods or nanoballs  is one of the most prospective topics in the semiconductor technology. We present results of experiments concerning obtaining gallium nitride nanocrystals by Sublimation Sandwich Method.  As starting materials we used a mixture of gallium and gallium nitride powder and gaseous ammonia as source of nitrogen.  The GaN nanocrystals grow on various substrates with gold nanoballs  (a catalyst agent) by the vapor- liquid- solid mechanism.  The process reactions are as follows:

Ga + Au → GaAu_(alloy)

 GaAu_{(alloy )}+ NH₃ → GaN + 1.5 H₂ + Au

The obtained gallium nitride nanocrystals were examined by scanning electron microscopy (SEM), Raman studies and Powder X-ray diffraction (PXRD).

This work has been supported by the European Union in the framework of European Social Fund through the Warsaw University of Technology Development Programme.

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