Something intriguing occurs when nanoparticles come into contact with biological fluids: proteins attach themselves to the nanoparticle surfaces, forming what is called a "protein corona." This phenomenon has now resulted in a technique that could allow doctors and researchers to glean additional information from the blood of cancer patients. When researchers from the University of Manchester extracted injected liposomes—lipid-based nanoparticles used for drug delivery with minimal side effects—...