A special class of tiny gold particles can easily slip through cell membranes, making them good candidates to deliver drugs directly to target cells.
http://newsoffice.mit.edu/2014/gold-nanoparticles-may-be-useful-for-delivering-drugs-0721#.U9EzQvmpmi0.google_plusone_share
http://newsoffice.mit.edu/2014/gold-nanoparticles-may-be-useful-for-delivering-drugs-0721#.U9EzQvmpmi0.google_plusone_share
Scientists explain how gold nanoparticles easily penetrate cells, making them useful for delivering drugs.