Graphene surface to augment sensors in disease detection, drug screening, and other biological processes 10/11/2013 - 00:00 Writing in Nature Communications, researchers at The University of Manchester led by Dr Aravind Vijayaraghavan, and Dr Michael Hirtz at the Karlsruhe Institute of Technology (KIT), have demonstrated that membranes can be directly ‘written’ on to a graphene surface using a technique known as Lipid Dip-Pen Nanolithography (L-DPN).