Cargando…
Complex Stoichiometry-Dependent Reordering of 3,4,9,10-Perylenetetracarboxylic Dianhydride on Ag(111) upon K Intercalation
[Image: see text] Alkali metal atoms are frequently used for simple yet efficient n-type doping of organic semiconductors and as an ingredient of the recently discovered polycyclic aromatic hydrocarbon superconductors. However, the incorporation of dopants from the gas phase into molecular crystal s...
Autores principales: | , , , , , , , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American
Chemical Society
2015
|
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4768340/ https://www.ncbi.nlm.nih.gov/pubmed/26718635 http://dx.doi.org/10.1021/acsnano.5b07145 |
_version_ | 1782417933837795328 |
---|---|
author | Zwick, Christian Baby, Anu Gruenewald, Marco Verwüster, Elisabeth Hofmann, Oliver T. Forker, Roman Fratesi, Guido Brivio, Gian Paolo Zojer, Egbert Fritz, Torsten |
author_facet | Zwick, Christian Baby, Anu Gruenewald, Marco Verwüster, Elisabeth Hofmann, Oliver T. Forker, Roman Fratesi, Guido Brivio, Gian Paolo Zojer, Egbert Fritz, Torsten |
author_sort | Zwick, Christian |
collection | PubMed |
description | [Image: see text] Alkali metal atoms are frequently used for simple yet efficient n-type doping of organic semiconductors and as an ingredient of the recently discovered polycyclic aromatic hydrocarbon superconductors. However, the incorporation of dopants from the gas phase into molecular crystal structures needs to be controlled and well understood in order to optimize the electronic properties (charge carrier density and mobility) of the target material. Here, we report that potassium intercalation into the pristine 3,4,9,10-perylenetetracarboxylic dianhydride (PTCDA) monolayer domains on a Ag(111) substrate induces distinct stoichiometry-dependent structural reordering processes, resulting in highly ordered and large K(x)PTCDA domains. The emerging structures are analyzed by low-temperature scanning tunneling microscopy, scanning tunneling hydrogen microscopy (ST[H]M), and low-energy electron diffraction as a function of the stoichiometry. The analysis of the measurements is corroborated by density functional theory calculations. These turn out to be essential for a correct interpretation of the experimental ST[H]M data. The epitaxy types for all intercalated stages are determined as point-on-line. The K atoms adsorb in the vicinity of the oxygen atoms of the PTCDA molecules, and their positions are determined with sub-Ångström precision. This is a crucial prerequisite for the prospective assessment of the electronic properties of such composite films, as they depend rather sensitively on the mutual alignment between donor atoms and acceptor molecules. Our results demonstrate that only the combination of experimental and theoretical approaches allows for an unambiguous explanation of the pronounced reordering of K(x)PTCDA/Ag(111) upon changing the K content. |
format | Online Article Text |
id | pubmed-4768340 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2015 |
publisher | American
Chemical Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-47683402016-02-29 Complex Stoichiometry-Dependent Reordering of 3,4,9,10-Perylenetetracarboxylic Dianhydride on Ag(111) upon K Intercalation Zwick, Christian Baby, Anu Gruenewald, Marco Verwüster, Elisabeth Hofmann, Oliver T. Forker, Roman Fratesi, Guido Brivio, Gian Paolo Zojer, Egbert Fritz, Torsten ACS Nano [Image: see text] Alkali metal atoms are frequently used for simple yet efficient n-type doping of organic semiconductors and as an ingredient of the recently discovered polycyclic aromatic hydrocarbon superconductors. However, the incorporation of dopants from the gas phase into molecular crystal structures needs to be controlled and well understood in order to optimize the electronic properties (charge carrier density and mobility) of the target material. Here, we report that potassium intercalation into the pristine 3,4,9,10-perylenetetracarboxylic dianhydride (PTCDA) monolayer domains on a Ag(111) substrate induces distinct stoichiometry-dependent structural reordering processes, resulting in highly ordered and large K(x)PTCDA domains. The emerging structures are analyzed by low-temperature scanning tunneling microscopy, scanning tunneling hydrogen microscopy (ST[H]M), and low-energy electron diffraction as a function of the stoichiometry. The analysis of the measurements is corroborated by density functional theory calculations. These turn out to be essential for a correct interpretation of the experimental ST[H]M data. The epitaxy types for all intercalated stages are determined as point-on-line. The K atoms adsorb in the vicinity of the oxygen atoms of the PTCDA molecules, and their positions are determined with sub-Ångström precision. This is a crucial prerequisite for the prospective assessment of the electronic properties of such composite films, as they depend rather sensitively on the mutual alignment between donor atoms and acceptor molecules. Our results demonstrate that only the combination of experimental and theoretical approaches allows for an unambiguous explanation of the pronounced reordering of K(x)PTCDA/Ag(111) upon changing the K content. American Chemical Society 2015-12-30 2016-02-23 /pmc/articles/PMC4768340/ /pubmed/26718635 http://dx.doi.org/10.1021/acsnano.5b07145 Text en Copyright © 2015 American Chemical Society This is an open access article published under a Creative Commons Attribution (CC-BY) License (http://pubs.acs.org/page/policy/authorchoice_ccby_termsofuse.html) , which permits unrestricted use, distribution and reproduction in any medium, provided the author and source are cited. |
spellingShingle | Zwick, Christian Baby, Anu Gruenewald, Marco Verwüster, Elisabeth Hofmann, Oliver T. Forker, Roman Fratesi, Guido Brivio, Gian Paolo Zojer, Egbert Fritz, Torsten Complex Stoichiometry-Dependent Reordering of 3,4,9,10-Perylenetetracarboxylic Dianhydride on Ag(111) upon K Intercalation |
title | Complex
Stoichiometry-Dependent Reordering of 3,4,9,10-Perylenetetracarboxylic
Dianhydride on Ag(111) upon K Intercalation |
title_full | Complex
Stoichiometry-Dependent Reordering of 3,4,9,10-Perylenetetracarboxylic
Dianhydride on Ag(111) upon K Intercalation |
title_fullStr | Complex
Stoichiometry-Dependent Reordering of 3,4,9,10-Perylenetetracarboxylic
Dianhydride on Ag(111) upon K Intercalation |
title_full_unstemmed | Complex
Stoichiometry-Dependent Reordering of 3,4,9,10-Perylenetetracarboxylic
Dianhydride on Ag(111) upon K Intercalation |
title_short | Complex
Stoichiometry-Dependent Reordering of 3,4,9,10-Perylenetetracarboxylic
Dianhydride on Ag(111) upon K Intercalation |
title_sort | complex
stoichiometry-dependent reordering of 3,4,9,10-perylenetetracarboxylic
dianhydride on ag(111) upon k intercalation |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4768340/ https://www.ncbi.nlm.nih.gov/pubmed/26718635 http://dx.doi.org/10.1021/acsnano.5b07145 |
work_keys_str_mv | AT zwickchristian complexstoichiometrydependentreorderingof34910perylenetetracarboxylicdianhydrideonag111uponkintercalation AT babyanu complexstoichiometrydependentreorderingof34910perylenetetracarboxylicdianhydrideonag111uponkintercalation AT gruenewaldmarco complexstoichiometrydependentreorderingof34910perylenetetracarboxylicdianhydrideonag111uponkintercalation AT verwusterelisabeth complexstoichiometrydependentreorderingof34910perylenetetracarboxylicdianhydrideonag111uponkintercalation AT hofmannolivert complexstoichiometrydependentreorderingof34910perylenetetracarboxylicdianhydrideonag111uponkintercalation AT forkerroman complexstoichiometrydependentreorderingof34910perylenetetracarboxylicdianhydrideonag111uponkintercalation AT fratesiguido complexstoichiometrydependentreorderingof34910perylenetetracarboxylicdianhydrideonag111uponkintercalation AT briviogianpaolo complexstoichiometrydependentreorderingof34910perylenetetracarboxylicdianhydrideonag111uponkintercalation AT zojeregbert complexstoichiometrydependentreorderingof34910perylenetetracarboxylicdianhydrideonag111uponkintercalation AT fritztorsten complexstoichiometrydependentreorderingof34910perylenetetracarboxylicdianhydrideonag111uponkintercalation |