These nanocapsules are directed to the right spot by chemical receptors on their surface that recognise damaged cells. They release their drugs when they come across a specific trigger molecule.
The capsules could be made from nano-porous material. Nanopores are holes that act as tiny turnstiles. By making the nanopores only slightly larger than the drug molecules, you can make sure only one molecule escapes at a time. This means the drug is released at a constant rate.
|The tiny holes in this nanoporous material could be used to control the release of drugs in the body.|
Image: pSiMedica Ltd