MSE seminar

"Chemically Tailored Two-Dimensional Materials for Electronic and Energy Technologies"

Speaker:

Professor Mark C. Hersam

Materials Science and Engineering

Northwestern University

Date: Thursday, 07 October 2021

Time: 6:00-7:00 PM

Location: Online Zoom Room -  Join Meeting

https://kfupm.zoom.us/j/94757555014

Abstract:

Layered two-dimensional (2D) materials interact primarily via van der Waals bonding, which has created new opportunities for heterostructures that arenot constrained by epitaxial growth. However, it is important to acknowledge that van der Waals interactions are not limited to interplanar interactions in2D materials. In principle, any passivated, dangling bond-free surface interacts with another via non-covalent forces. Consequently, layered 2D materialscan be integrated with a diverse range of other materials, including those of different dimensionality, to form van der Waals heterostructures [1].Furthermore, chemical functionalization provides additional opportunities for tailoring the properties of 2D materials [2] and the degree of coupling acrossheterointerfaces [3]. In order to efficiently explore the vast phase space for van der Waals heterostructures, our laboratory employs solution-basedadditive assembly. In particular, constituent nanomaterials (e.g., carbon nanotubes, graphene, transition metal dichalcogenides, black phosphorus, boronnitride, and indium selenide) are isolated in solution, and then deposited into thin films with scalable additive manufacturing methods (e.g., inkjet, gravure,and screen printing) [4]. By achieving high levels of nanomaterial monodispersity and printing fidelity, a variety of electronic and energy applications canbe enhanced including photodetectors, optical emitters, supercapacitors, and batteries [5-7]. Furthermore, by integrating multiple nanomaterials intoheterostructures, unprecedented device function can be realized including anti-ambipolar transistors, gate-tunable Gaussian heterojunction transistors, andneuromorphic memtransistors [8-10]. In addition to technological implications for electronic and energy technologies, this talk will explore severalfundamental issues including band alignment, doping, trap states, and charge/energy transfer across van der Waals heterointerfaces.

Bio:

Mark C. Hersam is the Walter P. Murphy Professor of Materials Science and Engineering and Director of the Materials Research Centerat Northwestern University. He also holds faculty appointments in the Departments of Chemistry, Applied Physics, Medicine, andElectrical Engineering. He earned a B.S. in Electrical Engineering from the University of Illinois at Urbana-Champaign (UIUC) in 1996,M.Phil. in Physics from the University of Cambridge (UK) in 1997, and a Ph.D. in Electrical Engineering from UIUC in 2000. His researchinterests include nanomaterials, nanomanufacturing, nanoelectronics, scanning probe microscopy, renewable energy, and quantuminformation science. Dr. Hersam has received several honors including the Presidential Early Career Award for Scientists andEngineers, TMS Robert Lansing Hardy Award, AVS Peter Mark Award, MRS Outstanding Young Investigator, U.S. Science Envoy,MacArthur Fellowship, AVS Medard W. Welch Award, and eight Teacher of the Year Awards. Dr. Hersam has been repeatedlynamed a Clarivate Analytics Highly Cited Researcher with over 600 peer-reviewed publications that have been cited more than50,000 times with an h-index of 109. An elected member of the National Academy of Inventors, Dr. Hersam has founded twocompanies, NanoIntegris and Volexion, which are commercial suppliers of nanoelectronic and battery materials, respectively. Dr.Hersam is a Fellow of MRS, ACS, AVS, APS, AAAS, SPIE, and IEEE, and also serves as an Associate Editor of ACS Nano.

All faculty, researchers and graduate students are invited to attend

Best regards,

MSE department