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Aggregation of atomically precise graphene nanoribbons

Title data

Shekhirev, Mikhail ; Vo, Timothy H. ; Kunkel, Donna A. ; Lipatov, Alexey ; Enders, Axel ; Sinitskii, Alexander:
Aggregation of atomically precise graphene nanoribbons.
In: RSC Advances. Vol. 7 (2017) Issue 86 . - pp. 54491-54499.
ISSN 2046-2069
DOI: https://doi.org/10.1039/c7ra08049b

Abstract in another language

Solution bottom-up approaches can be used to prepare bulk quantities of narrow atomically precise graphene nanoribbons (GNRs) with various widths and geometries. These GNRs are often considered as promising materials for electronic and optoelectronic applications. However, the handling and processing of nanoribbons for practical applications can be difficult because of their entanglement and aggregation, and thus poor solubility in conventional solvents. In this work, we studied the aggregation-dependent properties of solution-synthesized chevron GNRs in a variety of solvents. We demonstrate that the spectroscopic features observed in the experimentally measured absorbance spectra of chevron GNRs are in a good agreement with the theoretically predicted excitionic transitions. We also show that the absorbance spectra of GNRs evolve with aggregation time, which is important to consider for the spectroscopic determination of optical bandgaps of nanoribbons. We discuss two types of GNR assemblies: bulk aggregates of π–π stacked nanoribbons that form in a solution and rather long one-dimensional (1D) structures that were observed on a variety of surfaces, such as Au(111), mica and Si/SiO2. We demonstrate that the few-μm-long 1D GNR structures can be conveniently visualized by conventional microscopy techniques and used for the fabrication of electronic devices.

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 06:49
Last Modified: 11 Oct 2019 06:49
URI: https://eref.uni-bayreuth.de/id/eprint/52723