Atomic-Scale Deformations at the Interface of a Mixed-Dimensional van der Waals Heterostructure

Research output: Contribution to journalArticleScientificpeer-review

Researchers

  • Kimmo Aleksi Mustonen
  • Aqeel Hussain
  • Christoph Hofer
  • Mohammad Reza Ahmadpour Monazam
  • Rasim Mirzayev
  • Kenan Elibol
  • Patrik Laiho
  • Clemens Mangler
  • Hua Jiang

  • Toma Susi
  • Esko Kauppinen

  • Jani Kotakoski
  • Jannik C. Meyer

Research units

  • University of Vienna

Abstract

Molecular self-assembly due to chemical interactions is the basis of bottom-up nanofabrication, whereas weaker intermolecular forces dominate on the scale of macromolecules. Recent advances in synthesis and characterization have brought increasing attention to two- and mixed-dimensional heterostructures and it has been recognized that van der Waals (vdW) forces within the structure may have a significant impact on their morphology. Here, we suspend single-walled carbon nanotubes (SWCNTs) on graphene to create a model system for the study of a 1D-2D molecular interface through atomic resolution scanning transmission electron microscopy observations. When brought in contact, we observe radial deformation of SWCNTs and the emergence of long-range linear grooves in graphene revealed by three-dimensional reconstruction of the heterostructure. These topographic features are strain-correlated but show no sensitivity to carbon nanotube helicity, electronic structure, or stacking order. Finally, despite random deposition of the nanotubes, we show that the competition between strain and vdW forces results in aligned carbon-carbon interfaces spanning hundreds of nanometers.

Details

Original languageEnglish
Article number8
Pages (from-to)8512–8519
JournalACS Nano
Volume12
Publication statusPublished - 17 Jul 2018
MoE publication typeA1 Journal article-refereed

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