Nano technology is regarded as a key technology of the 21st century, which will be used in a large lumber of industries and technical applications. On the hand, completely new products are being developed, and on the other hand, existing technical solutions are being replaced with 'nao solutions'. Possible application fields for nano technology are ineresting from an economic point of view, but they also have the potential to improve aspects of sutainability (for instance, increased efficiency and resource protection). (English Part from Texte 10/2007)