Chemical stability of (3,1)-chiral graphene nanoribbons
| Autor: | Dimas G. de Oteyza, Jesús Castro-Esteban, Alejandro Berdonces-Layunta, James Lawrence, Pavel Jelínek, Tao Wang, Diego Peña, Luciano Colazzo, Shayan Edalatmanesh, Mohammed S. G. Mohammed |
|---|---|
| Přispěvatelé: | European Commission, Agencia Estatal de Investigación (España), Eusko Jaurlaritza, Consejo Superior de Investigaciones Científicas (España), Academy of Sciences of the Czech Republic, Xunta de Galicia |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Graphene General Engineering General Physics and Astronomy Nanotechnology 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 7. Clean energy 01 natural sciences 0104 chemical sciences law.invention Scanning probe microscopy Nanoelectronics law General Materials Science Chemical stability 0210 nano-technology Graphene nanoribbons Electronic properties |
| Zdroj: | Digital.CSIC. Repositorio Institucional del CSIC instname |
| ISSN: | 2019-1073 |
| Popis: | Nanostructured graphene has been widely studied in recent years due to the tunability of its electronic properties and its associated interest for a variety of fields, such as nanoelectronics and spintronics. However, many of the graphene nanostructures of technological interest are synthesized under ultrahigh vacuum, and their limited stability as they are brought out of such an inert environment may compromise their applicability. In this study, a combination of bond-resolving scanning probe microscopy (BR-SPM), along with theoretical calculations, has been employed to study (3,1)-chiral graphene nanoribbons [(3,1)-chGNRs] that were synthesized on a Au(111) surface and then exposed to oxidizing environments. Exposure to the ambient atmosphere, along with the required annealing treatment to desorb a sufficiently large fraction of contaminants to allow for its postexposure analysis by BR-SPM, revealed a significant oxidation of the ribbons, with a dramatically disruptive effect on their electronic properties. More controlled experiments avoiding high temperatures and exposing the ribbons only to low pressures of pure oxygen show that also under these more gentle conditions the ribbons are oxidized. From these results, we obtain additional insights into the preferential reaction sites and the nature of the main defects that are caused by oxygen. We conclude that graphene nanoribbons with zigzag edge segments require forms of protection before they can be used in or transferred through ambient conditions. We acknowledge funding from the European Union’s Horizon 2020 program (Grant Agreement No. 635919), from the Spanish Agencia Estatal de Investigación (Grant Nos. PID2019-107338RB-C62 and PID2019-107338RB-C63), Gobierno Vasco (PIBA_2020_1_0036), Consejo Superior de Investigaciones Científicas (CSIC, LINKC20002), Xunta de Galicia (Centro Singular de Investigación de Galicia, 2019–2022, ED431G 2019/03), from the European Regional Development Fund-ERDF, from Praemium Academie of the Academy of Science of the Czech Republic (GACR project no. 20-13692X), and CzechNanoLab Research Infrastructure supported by MEYS CR (LM2018110). |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|