Carnegie Mellon University

Tzahi Cohen-Karni

Tzahi Cohen-Karni

Associate Professor

Scott Hall 4th Floor
5000 Forbes Avenue
Pittsburgh, PA 15213


Research Area: Soft, Nanostructured & Bioactive Materials

Tzahi Cohen-Karni is an Associate Professor at the Departments of Biomedical Engineering and Materials Science and Engineering in Carnegie Mellon University, Pittsburgh, PA, USA. He received both his B.Sc. degree in Materials Engineering and the B.A. degree in Chemistry from the Technion Israel Institute of Technology, Haifa, Israel, in 2004. He obtained his M.Sc. degree in Chemistry from Weizmann Institute of Science, Rehovot, Israel, in 2006 and his Ph.D. in Applied Physics from the School of Engineering and Applied Sciences, Harvard University, Cambridge MA, USA, in 2011. He was a Juvenile Diabetes Research Foundation (JDRF) Postdoctoral Fellow at the Massachusetts Institute of Technology and Boston Children’s Hospital at the labs of Robert Langer and Daniel S. Kohane from 2011 to 2013. Dr. Cohen-Karni received the Gold Graduate Student Award from the Materials Research Society in 2009, and received the 2012 International Union of Pure and Applied Chemistry Young Chemist Award. Dr. Cohen-Karni was awarded the Charles E. Kaufman Foundation Young Investigator Research Award (2014), the NSF CAREER Award (2016) and the Cellular and Molecular Bioengineering Rising Star Award (2017), the Office of Naval Research Young Investigator Award (2017), The George Tallman Ladd Research Award (2017) and the Cellular Molecular Bioengineering Young Innovator Award (2018).


Technion IIT, Haifa, Israel, B.Sc., 2004, Materials Engineering

Technion IIT, Haifa, Israel, B.A., 2004, Chemistry

Weizmann Institute of Science, Rehovot, Israel, M.Sc., 2006, Chemistry

Harvard University, Cambridge MA, USA, Ph.D., 2011, Applied Physics

MIT, Cambridge MA, USA, Postdoc, 2013, Bioengineering


We are a team of scientists that combine materials science and engineering, chemistry, biology, and physics to develop new class of nanoscale hybrid-materials. Our work is focused on understanding the underlying mechanisms of the emergent electrical, electrochemical, optical, and thermal properties of our synthesized novel hybrid-nanomaterials. Our tailor-made complex hybrid-nanomaterials are also being investigated as bio-sensors, and energy conversion and storage platforms. Leveraging this extensive knowledge, we are also exploring novel strategies for the investigation of biological entities at multiple length scales from the molecular level to complex cellular networks.


Recent Publications -

D San Roman, R Garg, T Cohen-Karni Bioelectronics with graphene nanostructures APL Materials 8 (10), 100906, 2020.

L Matino, SK Rastogi, LD Garma, T CohenKarni, F Santoro Characterization of the Coupling between Out‐of‐Plane Graphene and Electrogenic Cells Advanced Materials Interfaces 7 (18), 2000699, 2020.

Remote nongenetic optical modulation of neuronal activity using fuzzy graphene, Sahil K Rastogi, Raghav Garg, Matteo Giuseppe Scopelliti, Bernardo I Pinto, Jane E Hartung, Seokhyoung Kim, Corban GE Murphey, Nicholas Johnson, Daniel San Roman, Francisco Bezanilla, James F Cahoon, Michael S Gold, Maysam Chamanzar, Tzahi Cohen-Karni Proceedings of the National Academy of Sciences 117 (24), 13339-13349, 2020.

Engineering three-dimensional (3D) out-of-plane graphene edge sites for highly selective two-electron oxygen reduction electrocatalysis Daniel San Roman, Dilip Krishnamurthy, Raghav Garg, Hasnain Hafiz, Michael Lamparski, Noel T Nuhfer, Vincent Meunier, Venkatasubramanian Viswanathan, Tzahi Cohen-Karni ACS Catalysis 10 (3), 1993-2008, 2020.

Organ-on-e-chip: Three-dimensional self-rolled biosensor array for electrical interrogations of human electrogenic spheroids Anna Kalmykov, Changjin Huang, Jacqueline Bliley, Daniel Shiwarski, Joshua Tashman, Arif Abdullah, Sahil K Rastogi, Shivani Shukla, Elnatan Mataev, Adam W Feinberg, K Jimmy Hsia, Tzahi Cohen-Karni Science Advances 5 (8), eaax0729, 2020.