Stakeholder engagement and dialogue are essential to the responsible development of nanotechnologies in Europe. NANODIODE establishes an innovative, coordinated programme for outreach and dialogue throughout Europe to support the effective governance of nanotechnologies. The project integrates vital engagement activities along the innovation value chain: it combines ‘upstream’ public engagement (by way of dialogues that integrate societal needs and expectations into the policy debate) with ‘midstream’ engagement (by organising open innovation workshops at the level of R&D) and ‘downstream’ strategies for education and communication.The overall objectives of NANODIODE are to:• Develop new strategies for outreach and dialogue along nanotechnology value chains;• Organise engagement and dialogue at the 'upstream' level of research policy;• Enable processes of co-creation during research and innovation;• Professionalise nanotechnology education and training;• Establish an innovative programme for outreach and communication on nanotechnologies;• Assess the impact of the project’s activities and provide policy feedback with a view to Horizon 2020.The consortium brings together a strong network of partners from various backgrounds and extending across Europe (representing academia, industry, civil society, education and communication). Many partners bring their experience as coordinators of earlier European projects (such as NANOCODE, NANOREG, NANOEIS, NANOCAP, NANOPLAT, OBSERVATORY NANO, NANOPINION, NANOCHANNELS and NANOBIORAISE). This will allow the project to look back and identify best practices based on existing experience - and developing new, innovative models and tools for outreach and dialogue when necessary. The project will also look ahead: as Horizon 2020 unfolds, the project will provide best practices for the effective governance of nanotechnologies in Europe.