66th Annual STS (2006-2007)
Finalists
Alexandra Maria Courtis

CALIFORNIA
Alexandra Maria Courtis, 17, of Davis, entered the Intel Science Talent Search with a chemistry project about the novel synthesis of silicon nanoparticles (quantum dots) that may help physicians track biological processes and diagnose cancer. Alexandra believes that when these non-toxic nanoparticles are injected into the bloodstream, they attach to blood cells and brightly photoluminesce, creating clearer MRI images than those currently generated using dye molecules. By creating a novel and cost-efficient synthesis of water soluble, non-toxic silicon nanoparticles terminated with organic ligands, she developed a potentially powerful new tool for tumor detection and imaging. Alexandra has presented findings from her two-year project at meetings of the American Chemical Society and to the National Science Foundation, even explaining her results in French to European scientists. After graduating from Davis Senior High School, Alexandra plans to enter Harvard or Yale. She plays piano and enjoys varsity tennis, Oxford debate and dancing, and heads the student chapter of Amnesty International, promoting awareness of African child soldiers. Alexandra is the daughter of John and Dr. Maria Courtis.