Geek.com original article here:Her creation is being heralded as a “Swiss army knife of cancer treatment.” Zhang managed to develop a nanoparticle that can be delivered to the site of a tumor through the drug salinomycin. Once there it kills the cancer stem cells. However, Zhang went further and included both gold and iron-oxide components, which allow for non-invasive imaging of the site through MRI and Photoacoustics.
and the official announcement by Siemens plus some other inventions from high-school geniuses here:
She put 1000 hours of research on this project on top of studying for school!