The content and results of the two-day FachDialogue on "sustainable nanotechnologies" organised by the Federal Ministry of Environment (BMUB) in June 2012 have been integrated into this report.
This report summarises different aspects of the "guiding concept sustainability" and the assessment of the sustainability of nanotechnologies. In the introduction the development of the "guiding concept sustainability" is explained and some general characteristics and functions of guiding concepts are described. Then, the guiding concept "sustainable chemistry" is introduced, which could in principle also address nanotechnologies. In the last part of the report some aspects of "sustainable nanotechnologies" are discussed.