Evanston, Illinois, US – New cancer treatments in the form of diamond-coated chemotherapy drugs look promising. One of the primary difficulties with battling cancer has been getting the drugs to stay in the tumor long enough to kill it. Tumors, over time, develop “pumps” that evacuate the drug before it has a chance to work. Researchers have been working on a method of binding chemotherapy drugs to diamond nanoparticles, in an attempt to get the drugs “stuck” in the tumor. The particles are too large to be pumped out. With a longer drug residence time, tumors are reduced in size much more effectively.