The European Union Observatory for Nanomaterials (EUON) is calling for study topics on nanomaterials which address issues or question relevant to nanomaterials currently on the EU market. EUON plans to conduct up to three studies per year to determine and address knowledge gaps about nanomaterials. Proposals should consist of no more than 200 words. Proposed studies should be computer based, possible to execute within 3 to 9 months, address health and safety aspects of nanomaterials, and examine occupational and consumer hazards. Proposals can be submitted via email to EUON.