Abstract: A method for removing one or more substances from a starting material comprising a metal, a semi-metal, a metal compound or a semi-metal compound comprises the steps of mixing fine particles of said starting material with a reagent Y and heating the starting material so as to effect a diffucion interface between the starting material and the reagent Y such that the one or more substances migrate from the nanoparticle to reagent Y. Purified metal or semi-metal particles are thereby produced. The method can be used for the production of photovoltaic grade silicon.

Abstract: The present invention relates to a system for preparing an experimentally validated microarray, in particular experimentally validated DNA microarrays, to a corresponding preparation method and to the microarray obtainable by the method of the invention. The system of the invention and the method are particularly distinguished by a decoupling of provision of the layout for the validated microarray and preparation of the final product itself.