UltrAuFoil® is a holey gold film with a thickness of about 500 Å, that provides an ultrastable gold support for for biological samples in cryo-EM techniques. The movement of frozen specimens during imaging will be significantly reduced leading to better image contrast and finally to better 3D reconstructions with less data.
 Russo et al. (2014) Ultrastable gold substrates for electron cryomicroscopy. Science 346:1377.