Small, but wow: In the nanoworld, tiny particles determine big effects. This issue of Technoscope is all about the fascinating world of nanotechnology - where materials suddenly take on new colours, substances become stronger or lighter and medicines have a targeted effect on the body. We show how nano research is used in medicine, energy and the environment, what opportunities it offers for sustainable innovation - and where the risks and unanswered questions lie. A look behind the scenes of a technology that is shaping our invisible future.