from MIT’s Technology Review:
Peratech makes an electrically conductive material called quantum tunneling composite (QTC). When the material is compressed electrons jump between two conductors separated by polymer insulating layer covered with metallic nanoparticles.
QTC robot skin could perhaps let a robot know precisely where it has been touched, and with how much pressure. It could also be helpful in designing machines that have better grasping capabilities, and for developing more natural ways for machines to interact with humans.