Biomedicines are produced by living cells and are used to treat cancer and autoimmune diseases among other things. One challenge is that the medicines are very expensive to produce, something that limits global access. Now researchers from Chalmers have invented a material that uses electrical signals to capture and release biomolecules. The new and efficient method may have a major impact in the development of biomedicines and pave the way for the development of electronic pills and drug implants.