University of Texas researchers are coating brain-implant electrodes with carbon nanotubes to make them more conductive (less power needed, so reduced battery drain for longer life), reduce the size (fewer side effects and tissue damage), and reduce electrical noise (better recording and feedback).

The researchers’ simplified technique for adding nanotubes to electrodes: place electrodes in a water-based solution of carbon nanotubes; apply a small voltage to sites on the electrodes to attract and attach the nanotubes.