MSE Seminar: Fang Liu

Event interval: Single day event
Accessibility Contact: Matthew Yankowitz, myank@uw.edu
Event Types: Lectures/Seminars

Title: Fang Liu, Michigan Technological University, will present "Large scale production of artificial two-dimensional superlattices."

Abstract: Two-dimensional (2D) materials and their engineered lattices offer exciting opportunities for next-generation electronic, optoelectronic, and electrochemical devices. Yet, studies of high-quality heterostructures have been largely constrained to microscopic flakes. Here, we present scalable, controllable top-down methods that transform a wide range of van der Waals (vdW) single crystals into twisted moiré superlattices with high yield, exceptional uniformity, and macroscopic dimensions from millimeters to centimeters. Access to such large-area structures has enabled new discoveries, including ultrafast thermal exchange at bilayer interfaces, rapid photoinduced tuning of moiré patterns, and markedly reduced Debye temperatures in deformed monolayers compared to their isolated counterparts. Furthermore, by patterning 1D features—such as nanoribbon arrays and nanowrinkles—on 2D monolayers, we uncover unique electronic and thermodynamic behaviors absent in pristine layers. These advances in large-scale 2D artificial structures pave the way toward mass production and practical deployment of twistronic devices.

Bio: Dr. Fang Liu is an Assistant Professor of Chemistry at Stanford University. She started her group in 2020. Her research focuses on the light-induced dynamics of solid low dimensional materials and construction of low dimensional artificial structures. Prior to her current position, she was a postdoctoral fellow in the group of Prof. Xiaoyang Zhu at Columbia University. Prior to working in Columbia, she worked under the direction of Prof. Marsha I Lester at University of Pennsylvania. She received her Ph.D. in 2015 and worked as a postdoc in the same group in 2016. She received her B.S. in chemistry at Peking University in 2010.