Hierarchical on-surface synthesis and electronic structure of carbonyl-functionalized one- and two-dimensional covalent nanoarchitectures

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(Originalarbeit)


Details zur Publikation

Autor(en): Steiner C, Gebhardt J, Ammon M, Yang Z, Heidenreich A, Hammer N, Görling A, Kivala M, Maier S
Zeitschrift: Nature Communications
Jahr der Veröffentlichung: 2017
Band: 8
ISSN: 2041-1723
Sprache: Englisch


Abstract


The fabrication of nanostructures in a bottom-up approach from specific molecular precursors offers the opportunity to create tailored materials for applications in nanoelectronics. However, the formation of defect-free two-dimensional (2D) covalent networks remains a challenge, which makes it difficult to unveil their electronic structure. Here we report on the hierarchical on-surface synthesis of nearly defect-free 2D covalent architectures with carbonyl-functionalized pores on Au(111), which is investigated by low-temperature scanning tunnelling microscopy in combination with density functional theory calculations. The carbonyl-bridged triphenylamine precursors form six-membered macrocycles and one-dimensional (1D) chains as intermediates in an Ullmann-type coupling reaction that are subsequently interlinked to 2D networks. The electronic band gap is narrowed when going from the monomer to 1D and 2D surface-confined π-conjugated organic polymers comprising the same building block. The significant drop of the electronic gap from the monomer to the polymer confirms an efficient conjugation along the triphenylamine units within the nanostructures.



FAU-Autoren / FAU-Herausgeber

Ammon, Maximilian
Professur für Experimentalphysik (Rastersondenmikroskopie)
Gebhardt, Julian Dr.
Lehrstuhl für Theoretische Chemie
Görling, Andreas Prof. Dr.
Lehrstuhl für Theoretische Chemie
Hammer, Natalie
Lehrstuhl für Organische Chemie I
Heidenreich, Alexander
Sonderforschungsbereich 953/2 Synthetische Kohlenstoffallotrope
Kivala, Milan Prof. Dr.
Lehrstuhl für Organische Chemie I
Maier, Sabine Prof. Dr.
Professur für Experimentalphysik (Rastersondenmikroskopie)
Steiner, Christian
Professur für Experimentalphysik (Rastersondenmikroskopie)
Yang, Zechao
Professur für Experimentalphysik (Rastersondenmikroskopie)


Zusätzliche Organisationseinheit(en)
Graduiertenkolleg 1896/2 In situ Mikroskopie mit Elektronen, Röntgenstrahlen und Rastersonden
Exzellenz-Cluster Engineering of Advanced Materials


Zitierweisen

APA:
Steiner, C., Gebhardt, J., Ammon, M., Yang, Z., Heidenreich, A., Hammer, N.,... Maier, S. (2017). Hierarchical on-surface synthesis and electronic structure of carbonyl-functionalized one- and two-dimensional covalent nanoarchitectures. Nature Communications, 8. https://dx.doi.org/10.1038/ncomms14765

MLA:
Steiner, Christian, et al. "Hierarchical on-surface synthesis and electronic structure of carbonyl-functionalized one- and two-dimensional covalent nanoarchitectures." Nature Communications 8 (2017).

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Zuletzt aktualisiert 2018-11-08 um 01:43