Researchers at the U.K.'s University of Manchester and Germany's Karlsruhe Institute of Technology have developed a method by which they can create highly detailed cell membrane models on a graphene surface, providing a way to study how drugs behave when delivered across the lipid bilayer. The scientists used a technique called lipid dip-pen nanolithography to uniformly spread lipids across the graphene surface, creating a realistic membrane model with many of the characteristics associated with the real thing. Like a pen on paper, the researchers say, the sharp tip allows for the creation of artificial membranes with nano-scale precision. More