Cancer Cells Microsurgery via Asymmetric Bent Surface Au/Ag/Ni Microrobotic Scalpels Trough a Transversal Rotating Magnetic Field Jan Vyskočil, Carmen C. Mayorga-Martinez*, Eva Jablonská, Filip Novotný, Tomáš Ruml, and Martin Pumera* ACS Nano 2020, 14(7), 8247-8256