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Dense monolayer films of atomically precise graphene nanoribbons on metallic substrates enabled by direct contact transfer of molecular precursors

Title data

Teeter, Jacob D. ; Costa, Paulo S. ; Zahl, Percy ; Vo, Timothy H. ; Shekhirev, Mikhail ; Xu, Wenwu ; Zeng, Xiao Cheng ; Enders, Axel ; Sinitskii, Alexander:
Dense monolayer films of atomically precise graphene nanoribbons on metallic substrates enabled by direct contact transfer of molecular precursors.
In: Nanoscale. Vol. 9 (2017) Issue 47 . - pp. 18835-18844.
ISSN 2040-3372
DOI: https://doi.org/10.1039/C7NR06027K

Abstract in another language

Atomically precise graphene nanoribbons (GNRs) of two types, chevron GNRs and N = 7 straight armchair GNRs (7-AGNRs), have been synthesized through a direct contact transfer (DCT) of molecular precursors on Au(111) and gradual annealing. This method provides an alternative to the conventional approach for the deposition of molecules on surfaces by sublimation and simplifies preparation of dense monolayer films of GNRs. The DCT method allows deposition of molecules on a surface in their original state and then studying their gradual transformation to polymers to GNRs by scanning tunneling microscopy (STM) upon annealing. We performed STM characterization of the precursors of chevron GNRs and 7-AGNRs, and demonstrate that the assemblies of the intermediates of the GNR synthesis are stabilized by π–π interactions. This conclusion was supported by the density functional theory calculations. The resulting monolayer films of GNRs have sufficient coverage and density of nanoribbons for ex situ characterization by spectroscopic methods, such as Raman spectroscopy, and may prove useful for the future GNR device studies.

Further data

Item Type: Article in a journal
Refereed: Yes
Institutions of the University: Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Lehrstuhl Experimentalphysik XI - Funktionelle Nanostrukturen
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Lehrstuhl Experimentalphysik XI - Funktionelle Nanostrukturen > Lehrstuhl Experimentalphysik XI - Funktionelle Nanostrukturen - Univ.-Prof. Dr. Axel Enders
Result of work at the UBT: No
DDC Subjects: 500 Science > 530 Physics
Date Deposited: 11 Oct 2019 06:44
Last Modified: 11 Oct 2019 06:45
URI: https://eref.uni-bayreuth.de/id/eprint/52724