3D-Printed Graphene Nanoflakes May Play Role in Regenerative Medicine and Tissue Engineering (3D Printing Industry) ” A research team at Northwestern University has begun printing three-dimensional structures with graphene nanoflakes. The team, led by Ramille Shah, assistant professor of Materials Science and Engineering at the McCormick School of Engineering and Surgery at the Feinberg School of Medicine, has developed a new kind of graphene ink that can be used to print large 3D structures. Shah ink uses 60 to 70 percent graphene, preserving the integrity of the material, including its electrical conductivity. The secret ingredient in Shah ink is a mix of biocompatible elastomer and fast-evaporating solvents.This particular graphene-based ink is just one of 30 printable bio inks that Shah has formulated with her graduate team. All of these inks are compatible with tissues and organs, and all of them could potentially be used as ground zero for printing more complex organs. Shah believes these inks could one day play a significant role in regenerative medicine and tissue engineering. In fact, her team has already run some tests populating one of the scaffolds with stem cells.