"Lithographically Patterned Functional Polymer–Graphene Hybrids for Nanoscale Electronics"

Doron Naveh, Assistant Professor of Electrical Engineering, Bar-Ilan University, Israel

March 2nd (Friday), 3:30pm
Material Research Laboratory (MRL), Rm 2048

Two-dimensional (2D) materials are believed to hold significant promise in nanoscale optoelectronics. While significant progress has been made in this field over the past decade, the ability to control charge carrier density with high spatial precision remains an outstanding challenge in 2D devices. The presented approach simultaneously addresses the dual issues of charge-carrier doping and spatial precision based on a functional lithographic resist that employs methacrylate polymers containing zwitterionic sulfobetaine pendent groups for noncovalent surface doping of 2D materials. We demonstrate scalable approaches for patterning these polymer films via electron-beam lithography, achieving precise spatial control over carrier doping for fabrication of high-quality, all-2D, lateral p–n junctions in graphene. Our approach preserves all of the desirable structural and electronic properties of graphene while exclusively modifying its surface potential. The functional polymer resist platform and concept offers a facile route toward lithographic doping of graphene- and other 2D material-based optoelectronic devices.

About Doron Naveh:

Doron Naveh received the B.Sc. degrees in physics and materials engineering from Ben-Gurion University, Israel, 2001 and the M.Sc. degree in physics in 2003, and Ph.D. degree in materials science from Weizmann Institute of Science, in 2009. He held postdoc position at the department of mechanical and aerospace engineering of Princeton University in 2008-2009 and at the department of electrical and computer engineering of Carnegie Mellon University 2009-2012. Currently he is an assistant professor of electrical engineering at Bar-Ilan University, Israel. His research interests are emerging nano-devices and with a focus on 2D materials.

Hosted by: Professor Kaustav Banerjee