Gennesys : Grand European initiative on nanoscience and nanotechnology using neutron and synchrotron radiation sourdes Executive summary Preface Forewords Introduction Generic challenges for fundamental research in nanomaterials science Specific challenges for nanomaterials design Specific challenges for nanomaterials engineering Specific challenges in nanomaterials technologies Metrology standardisation instrumentation : nanomaterials technology : the need for nanometrology research and technology Implications of GENNESYS for industry Future implications of GENNESYS for European synchrotron radiation laser and neutron facilities Implications of GENNESYS for education Societal ethical environmental and health implications of nanomaterials science and technology Conclusions recommendations future strategies and action plan