Shape - Composition - Defect Interplay in 2D Transition Metal Dichalcogenides
· Invited
Abstract
We focus on the interplay of the 2D sheet shape via local variations in composition and/or variations in topological defect density through a combination of strain engineering and shape programming. This includes patterning composition and defect profiles via growth on non-flat substrates and patterning profiles via composition patterning. We implement these ideas theoretically and within phase field and finite element method computations. We then explore applications of these ideas to create a diverse set of composition, defect, and shape patterns and programming bilayer twist. We then exploit Janus structures to program bilayer twist and to actuate dynamic shape change.
*This work was funded by the Center for the Computational Design of Functional Layered Materials, an Energy Frontier Research Center funded by the United States Department of Energy (DOE), Office of Science, Basic Energy Sciences (BES), under award no. DE-SC0012575 (DJS and JB) and through the National Science Foundation Graduate Research Fellowship Program under Grant No. DGE-1845298 (SR).
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Presenters
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David Srolovitz
- Materials Science and Engineering, City Univ of Hong Kong