Large scale chemical functionalization of locally curved graphene with nanometer resolution

0534512 - ÚFCH JH 2021 RIV US eng J - Journal Article
Drogowska-Horna, Karolina A. - Valeš, Václav - Plšek, Jan - Michlová, Magdalena - Vejpravová, J. - Kalbáč, Martin
Large scale chemical functionalization of locally curved graphene with nanometer resolution.
Carbon. Roč. 164, AUG 2020 (2020), s. 207-214. ISSN 0008-6223. E-ISSN 1873-3891
R&D Projects: GA ČR GA18-20357S; GA MŠMT(CZ) LM2015073; GA MŠMT EF16_026/0008382; GA MŠMT(CZ) EF16_013/0001821
EU Projects: European Commission(XE) 716265
Grant - others:Ministerstvo školství, mládeže a tělovýchovy - GA MŠk(CZ) CZ.02.1.01/0.0/0.0/16_026/0008382; GA MŠk(CZ) CZ.02.1.01/0.0/0.0/16_013/0001821
Institutional support: RVO:61388955
Keywords : fluorinated graphene * hydrogen storage * biaxial strain * reactivity * curvature * chemistry * graphane * bilayer
OECD category: Physical chemistry
Impact factor: 9.594, year: 2020
Method of publishing: Open access

Anchoring various functional groups to graphene is the most versatile approach for tailoring its functional properties. To date, one must use a special tunneling microscope for attaching a molecule at a specific position on the graphene with resolution better than several hundred nanometers, however, achieving this resolution is impossible on a large scale. We demonstrate for the first time that chemical functionalization can be achieved with nanometer resolution by introducing strain with nanometer scale modulation into a graphene layer. The spatial distribution of the strain has been achieved by transferring a single-layer graphene (SLG) onto a substrate decorated by a few nm large nanoparticles (NPs). By changing the number of NPs on the substrate, the amount of locally strained SLG increases, as confirmed by atomic force microscopy (AFM) and Raman spectroscopy investigations. We further carried out hydrogenation and fluorination on the SLG with increasing amount of nanoscale corrugations. Raman spectroscopy, AFM and X-ray photoelectron spectroscopy revealed unambiguously that the level of functionalization increases proportionally with the number of NPs, which means an increasing number of the locally strained SLG. Our approach thus enables control of the amount and the position of functional groups on graphene with nanometer resolution. (C) 2020 The Authors. Published by Elsevier Ltd.
Permanent Link: http://hdl.handle.net/11104/0312697