Self-assembly of ClAlPc molecules on moiré-patterned graphene grown on Pt(111)
Entity
UAM. Departamento de Física de la Materia CondensadaPublisher
ElsevierDate
2021-04-01Citation
10.1016/j.susc.2021.121848
Surface Science 710 (2021): 121848
ISSN
0039-6028 (print)DOI
10.1016/j.susc.2021.121848Funded by
Financial support from the Spanish Ministerio de Economía y Competitividad (MINECO) and Fondo Europeo de Desarrollo Regional (FEDER) under grant No. MAT2016-77852-C2-2-R and from the Spanish Ministerio de Ciencia e Innovación, through the “María de Maeztu” Programme for Units of Excellence in R&D (grant No. CEX2018-000805- M) is gratefully acknowledgedProject
Gobierno de España. MAT2016-77852-C2-2-R; Gobierno de España. CEX2018-000805-MEditor's Version
https://doi.org/10.1016/j.susc.2021.121848Subjects
Graphene; Molecular Self-Assembly; Phthalocyanine; Scanning Tunneling Microscopy; FísicaRights
© 2021 The AuthorsEsta obra está bajo una licencia de Creative Commons Reconocimiento-NoComercial-SinObraDerivada 4.0 Internacional.
Abstract
Phthalocyanines are promising molecules for the development of organic electronic devices, for instance, molecular heterojunctions in organic solar cells or organic field-effect transistors. For an optimum performance of these devices, the molecular ordering on the substrate and the molecular electronic level alignment have been shown as crucial factors. In this work, the self-assembled structure and the electronic structure of chloroaluminum phthalocyanines (ClAlPc) on graphene grown on Pt(111) surfaces have been studied by scanning tunneling microscopy (STM) under ultrahigh vacuum (UHV) and low-temperature conditions. Graphene grown on Pt(111) exhibits multiple moiré patterns with different periodicities, offering a benchmark to investigate the influence of the graphene and the moiré patterns in the ClAlPc ordering. This surface allows to extend previous works performed on graphite and graphene on Cu(100), where no moiré patterns are found. Well-ordered molecular islands exhibiting rotational domains have been observed in the submonolayer regime. The orientation of individual ClAlPc molecules within the structure unit cell has been characterized pointing out to a Cl-Up configuration adopted by the molecules. Our measurements show a correlation between the molecular lattice orientation and the graphene directions, whereas no influence of the underlying moiré patterns has been found. Finally, the ClAlPc electronic structure has been characterized indicating a weak graphene-molecule interaction
Files in this item
Google Scholar:Jiménez-Sánchez, Mariano D.
-
Sánchez-Abad, Nour
-
Nicoara, Nicoleta
-
Gómez Rodríguez, José María
This item appears in the following Collection(s)
Related items
Showing items related by title, author, creator and subject.