Designing the Bending Stiffness of 2D Material Heterostructures

Jaehyung Yu, Edmund Han, M. Abir Hossain, Kenji Watanabe, Takashi Taniguchi, Elif Ertekin, Arend M. van der Zande, Pinshane Y. Huang

Research output: Contribution to journalArticlepeer-review

Abstract

2D monolayers represent some of the most deformable inorganic materials, with bending stiffnesses approaching those of lipid bilayers. Achieving 2D heterostructures with similar properties would enable a new class of deformable devices orders of magnitude softer than conventional thin-film electronics. Here, by systematically introducing low-friction twisted or heterointerfaces, interfacial engineering is leveraged to tailor the bending stiffness of 2D heterostructures over several hundred percent. A bending model is developed and experimentally validated to predict and design the deformability of 2D heterostructures and how it evolves with the composition of the stack, the atomic arrangements at the interfaces, and the geometry of the structure. Notably, when each atomic layer is separated by heterointerfaces, the total bending stiffness reaches a theoretical minimum, equal to the sum of the constituent layers regardless of scale of deformation—lending the extreme deformability of 2D monolayers to device-compatible multilayers.

Original languageEnglish (US)
Article number2007269
JournalAdvanced Materials
Volume33
Issue number9
DOIs
StatePublished - Mar 4 2021

Keywords

  • 2D heterostructures
  • bending mechanics
  • deformable materials
  • electron microscopy
  • interfacial engineering

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

Fingerprint Dive into the research topics of 'Designing the Bending Stiffness of 2D Material Heterostructures'. Together they form a unique fingerprint.

Cite this