Jump to main content
Jump to site search

Issue 35, 2017
Previous Article Next Article

Rotational superstructure in van der Waals heterostructure of self-assembled C60 monolayer on the WSe2 surface

Author affiliations

Abstract

Hybrid van der Waals (vdW) heterostructures composed of two-dimensional (2D) layered materials and self-assembled organic molecules are promising systems for electronic and optoelectronic applications with enhanced properties and performance. Control of molecular assembly is therefore paramount to fundamentally understand the nucleation, ordering, alignment, and electronic interaction of organic molecules with 2D materials. Here, we report the formation and detailed study of highly ordered, crystalline monolayers of C60 molecules self-assembled on the surface of WSe2 in well-ordered arrays with large grain sizes (∼5 μm). Using high-resolution scanning tunneling microscopy (STM), we observe a periodic 2 × 2 superstructure in the C60 monolayer and identify four distinct molecular appearances. Using vdW-corrected ab initio density functional theory (DFT) simulations, we determine that the interplay between vdW and Coulomb interactions as well as adsorbate–adsorbate and adsorbate–substrate interactions results in specific rotational arrangements of the molecules forming the superstructure. The orbital ordering through the relative positions of bonds in adjacent molecules creates a charge redistribution that links the molecule units in a long-range network. This rotational superstructure extends throughout the self-assembled monolayer and opens a pathway towards engineering aligned hybrid organic/inorganic vdW heterostructures with 2D layered materials in a precise and controlled way.

Graphical abstract: Rotational superstructure in van der Waals heterostructure of self-assembled C60 monolayer on the WSe2 surface

Back to tab navigation

Supplementary files

Article information


Submitted
04 Jun 2017
Accepted
21 Aug 2017
First published
23 Aug 2017

Nanoscale, 2017,9, 13245-13256
Article type
Paper

Rotational superstructure in van der Waals heterostructure of self-assembled C60 monolayer on the WSe2 surface

E. J. G. Santos, D. Scullion, X. S. Chu, D. O. Li, N. P. Guisinger and Q. H. Wang, Nanoscale, 2017, 9, 13245 DOI: 10.1039/C7NR03951D

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.


Social activity

Search articles by author

Spotlight

Advertisements