Document Type

Journal Article

Department/Unit

Institute of Computational and Theoretical Studies; Department of Physics

Language

English

Abstract

We report an unusual self-assembled layer structure of chloroaluminium phthalocyanine (ClAlPc) molecules on highly ordered pyrolytic graphite (HOPG), in which a close-packed well-ordered monolayer is separated from the substrate by a relatively disordered buffer layer, as revealed using scanning tunneling microscopy (STM). Our close-packed monolayer has a nearly rectangular lattice, instead of the distinctly different square lattice for the more commonly observed well-ordered bilayer structure. This may be due to the dominance of intermolecular interactions within the monolayer when the influence from the substrate is shielded by the buffer layer. Density Functional Theory (DFT) calculations and Reduced Density Gradient (RDG) analysis indicate that the dominant intermolecular interaction within the unusual layer is likely the London dispersion force.

Keywords

Weak interactions, Dispersion forces, 2D self-assembly

Publication Date

3-2019

Source Publication Title

Surface Science

Volume

681

Start Page

104

End Page

110

Publisher

Elsevier

DOI

10.1016/j.susc.2018.11.010

Link to Publisher's Edition

https://doi.org/10.1016/j.susc.2018.11.010

ISSN (print)

00396028

Available for download on Thursday, April 01, 2021

Included in

Physics Commons

Share

COinS