Fig. 5From: Nanotechnology in respiratory medicineGd@C82(OH)22 consists of a gadolinium atom (green) inside a 2Â nm cage of carbon atoms (grey). The hydroxyl groups (red) outside the cage are responsible for water solubility. In water the molecule forms aggregates [Gd@C82(OH)22]n with average size of 25Â nmBack to article page