Quattrone Nanofabrication

Leading-Edge Nanofabrication

The Quattrone Nanofabrication Facility supports nanoelectronics, nanomaterials development and integration, soft matter, microfluidics and MEMS/NEMS.

QNF resides in the Krishna P. Singh Center for Nanotechnology. By providing core nanofabrication capabilities, our mission is to enable research and development in a number of areas. As embodied in the Penn Compact, QNF focuses on increased access, as well as integrating knowledge by engaging the Greater Philadelphia Region and far beyond. Our core endeavors are to support teaching, research, service and commercialization at the micro- and nanoscale.

QNF staff operates an 11,000 square foot cleanroom with leading-edge equipment capable of electron-beam and optical lithography, physical and chemical vapor deposition, dry and wet processing, metrology, and device characterization. In addition, a complimentary facility for soft materials and laser micromachining is maintained by QNF for diverse materials processing, microfluidics and lab-on-chip activities. For device packaging and hybridization, there is a suite of backend equipment available for wire bonding, wafer bonding, electrical testing and wafer dicing.


Eric Johnston

Director, Quattrone Nanofabrication Facility

Eric Johnston is the Director of the Quattrone Nanofabrication Facility within the Singh Center for Nanotechnology. He has been at Penn since 1996, first as a research specialist in the Bioengineering Department, then in 2012 as a staff member in QNF. Eric’s passion is reducing roadblocks to success for users in the nanofabrication facility. He has done this through promotion of hands-on workshops, video training support, and extensive documentation. He is still actively involved in training in microfluidics fabrication.



David Barth, Ph.D.

Senior Manager, Lithography & Advanced Processing
Quattrone Nanofabrication Facility

David Barth is responsible for lithography, process integration, and new process development in the QNF. His background includes nanophotonic device fabrication, electron beam lithography, and process support on a variety of fabrication tools and techniques. He has a Ph.D. from UC Berkeley and a B.E. and M.E. from Stevens Institute of Technology in Mechanical Engineering.


Kyle Keenan

Senior Manager, Laboratory Operations
Quattrone Nanofabrication Facility

Kyle’s responsibilities include cleanroom processing equipment health and optimization, oversight of new equipment installation and qualification, as well as day-to-day operations.  Prior to joining Penn, Kyle worked at MIT Lincoln Laboratory as a photolithography and metrology specialist, and at Alpha Industries (now Skyworks, Inc.) as a process engineering assistant. He has a BA in Philosophy from Assumption College in Worcester, MA, and has been working in nanotechnology for more than 25 years.


Mohsen (Sam) Azadi, Ph.D.

Principal Scientist
Quattrone Nanofabrication Facility

Mohsen Azadi is a Principal Scientist at Singh Center for Nanotechnology at the University of Pennsylvania. He is responsible for research support and process development for the internal and external users at QNF. Prior to joining Singh Center, he was a PhD student at University of Pennsylvania working on micro and nanofabrication of MEMS/NEMS devices for photophoretic flight, Direct Energy conversion applications, and  interstellar flight. He is a scientific and technical committee & editorial review board member at World Academy of Science, Engineering and Technology. He served as a member of the Dean’s Advisory Board in the School of Engineering and Applied Science from Dec 2019 to July 2021.


Lucas Barreto, Ph.D.

Principal Scientist
Quattrone Nanofabrication Facility

Lucas Barreto has a background in surface science, focusing on the electronic and structural properties of quantum materials and thin films. Before joining the Singh Center for Nanotechnology, he worked as a Laboratory Manager at Drexel University, an assistant professor at the Federal University of ABC  (Brazil), and a postdoctoral fellow at the University of Campinas (Brazil). He has a Ph.D. in Physics from Aarhus University (Denmark) and a M.Sc. and B.Sc. in Physics from the Federal University of Bahia (Brazil).


Travis Venables

Lead Cleanroom Equipment Engineer
Quattrone Nanofabrication Facility

Travis is the Lead Cleanroom Equipment Engineer for the Quattrone Nanofabrication Facility. His main responsibilities are responding to equipment problem reports, performing preventive maintenance on all cleanroom equipment, projects to help with lab functionality, and assisting in all aspects of day-to-day operations. Before joining Penn, Travis worked at Princeton University as a Laboratory Coordinator/ Cleanroom Manager of the Quantum Device NanoFabrication Laboratory (QDNL). He has a BS in Biology and a minor in Environmental studies from Ursinus College in Collegeville, PA.


Ana Cohen

Nanofabrication Process Engineer
Quattrone Nanofabrication Facility

As part of the process team at QNF, Ana supports users through equipment training and process troubleshooting. Her primary focuses are lithography, metrology, and wet chemical processing, with a specialization in photolithography/laser writing. She also is passionate about introducing fellow underrepresented minorities to nanofabrication and championing them within the field.


Dan Sabrsula

Nanofabrication Process Engineer
Quattrone Nanofabrication Facility

Dan Sabrsula is a member of the process team at QNF and assists users by training them on equipment and helping with process troubleshooting. His main area of focus is physical vapor deposition, including sputtering, and thermal and electron-beam evaporation. He also trains and assists users with electrical characterization tools such as probe stations. Before joining Penn, Dan worked as a Research Scientist at Advanced Photon Sciences in VT, completing R&D contracts for the Department of Defence and Air Force. Dan has a BS in Physics with a minor in Political Science from Rochester Institute of Technology, Rochester, NY.


Feaz Kalamodeen

Lab Assistant
Quattrone Nanofabrication Facility

Feaz is the tactical leader for Micro Contamination Activities. He is also the point person for stockroom servicing support for 725 researchers at the QNF. His constant inventory control of 80-plus items has helped keep the QNF fully operation for the past two years.