Zinc oxide can be regarded as one of the most important metal oxide semiconductors for future applications. A great deal of effort has been made to synthesize nanostructured ZnO and understand the resulting properties. The control of both the physical and chemical properties of the nanoparticles is cruicial and it depends on several factors, namely the particle size, the shape of the particle, and their dispensability. The challenge is also in stabilizing as prepared nanoparticles to avoid further agglomeration and preserving their shape and size. Most of preparative methods for ZnO nanoparticles are based on a inorganic sol-gel methods. This route needs a precise control of pH of the reaction media and the use of alkali metal hydroxides as precipitants. Only few reports concern the preparation of nanosized particles from organometallic one-component precursors, which are readily available in a pure form.

In our novel approach we have utilized well-defined alkylzinc alkoxides or carboxylates as efficient ZnO precursors. Theses classes of compounds may be smoothly transformed into zinc oxide nanosize clusters and particles by the treatment with O₂ or O₂/H₂O system. We will also demonstrate that the stabilization of nanosized ZnO clusters is viable by coating them with polycarbonates. Finally, different [RZnL]_n (where L = O,O'-chelating ligand) complexes have been tested and the influence of the precursor structure and its aggregation on the structure and properties of ZnO nanoscaled clusters will be discussed.

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1. Obtained results of selective soldering using the developed fluxes.
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