Our Team

Principal Investigator

TzahiTzahi Cohen-Karni is an Assistant 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) and the Office of Naval Research Young Investigator Award (2017).

Ph.D. Students

SahilSahil Kumar Rastogi (2015-present) graduated from Carnegie Mellon University in 2015 with a M.S. degree in Biomedical Engineering where he studied the influence of particle size and surface modification on the uptake efficiency of nanoparticles in live mammalian cells. He was awarded the Summer Graduate Fellowship at CMU. Prior to joining CMU, he graduated with a B.Tech. degree in Biotechnology from Indian Institute of Technology, Guwahati, India in 2013. There he received the Institute Merit Scholarship for academic excellence. In 2012, he was selected for the Undergraduate Training Program in Temasek Lifesciences Laboratory at National University of Singapore, where he worked on developing a new nano-particulate diagnostic platform for microbial diagnostics. His interests lie in the application of nanotechnology in creating diagnostic and therapeutic platforms.


kalmykov-extraAnna Kalmykov (2016-present) obtained her Master of Science degree at Boston University in Biomedical Engineering, where she worked on developing flexible electronic substrates to deliver electromechanical stimuli to regenerative cardiac patches. During the course of her graduate career, she also interned as a catheter engineer supporting new product development and sustaining engineering for spray cryotherapy technology.

Prior to her graduate career Anna worked as an associate scientist in upstream research and development laboratory, where she conducted microbial and mammalian recombinant protein expression. Anna holds a Bachelor of Science degree in Biochemistry from the University of Maryland at College Park.


RaghavRaghav Garg (2017-present) graduated from Carnegie Mellon University in 2017 with a M.S. degree in Biomedical Engineering and is pursuing his doctorate with the Department of Materials Science Engineering. Over the course of his masters’ Raghav developed a hybrid nano-material: Nanowire-Templated Three-dimensional Fuzzy Graphene. He will be further exploring the properties of this novel fuzzy material through the course of his Ph.D. He was awarded the Summer Graduate Fellowship in 2106. He graduated with distinction from Indian Institute of Technology- Kanpur (IIT-K) in 2015 with majors in Biological Sciences and Bioengineering. There he received the Academic Excellence Award for his academic performance. His undergraduate project focused on defining the causality behind aberrant homeotic gene expressions and carcinogenesis. For his UG research, he received the Sagnik Ray Scholarship.


Daniel San Roman (2017-present) graduated with honors from the University of Tennessee, Knoxville in 2017 with a B.S. degree in Material Science and Engineering from the Tickle College of Engineering. His undergraduate research experiences vary from nanoparticle synthesis to silicate devitrification studies to development of graphite anode alternatives in Li-ion batteries. Through an internship experience, Daniel assisted in the partnership of Arconic and UT’s department of Material Science and Engineering which yielded ongoing senior design projects. Daniel’s research interests lie in functional, inorganic hybrid materials and nanotechnology. He sees great opportunity in utilizing these novel materials as a platform for next-generation devices capable of meeting the energy sector’s growing demands.


M.S. Students

Arjuna Chatrathi (2017-present) graduated from Northwestern University in 2017 with a B.S. degree in Biomedical Engineering. During his undergraduate career, he participated in neuroimaging research for neurodegenerative diseases, building data processing pipelines for electrocorticography and functional MRI.

At CMU, he is extending his interest in elucidating the functions of the brain and nervous system into developing nanoscale neurotransmitter biosensors for his Master’s research.



U.G. Students

Gaurav Balakrishnan     (2016-present)

Nicholas Lamprinakos   (2016-present)

Shivani Shukla              (2017-present)

Ziwen Ye                      (2017-present)

Past Members

Elnatan Mataev             (2014-2016)         M.S. Student

Atul G Madhusudhan     (2014-2016)         M.S. Student

Jennifer Bone               (2013-2015)         M.S. Student

Rachael McCoy                      (2015)         SURF student

Gordan Pace                          (2015)         SURF student

If you want to join our team, contact Dr. Tzahi Cohen-Karni (tzahi at andrew dot CMU dot edu).