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Het OWA, het open archief van het Waterbouwkundig Laboratorium heeft tot doel alle vrij toegankelijke onderzoeksresultaten van dit instituut in digitale vorm aan te bieden. Op die manier wil het de zichtbaarheid, verspreiding en gebruik van deze onderzoeksresultaten, alsook de wetenschappelijke communicatie maximaal bevorderen.
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| one publication added to basket [391588] |
Graphite and graphene fairy circles: a bottom-up approach for the formation of nanocorrals
Phan, T.H.; Van Gorp, H.; Li, Z.; Huynh, T.M.T.; Fujita, Y.; Verstraete, L.; Eyley, S.; Thielemans, W.; Uji-i, H.; Hirsch, B.E.; Mertens, S.F.L.; Greenwood, J.; Ivasenko, O.; De Feyter, S. (2019). Graphite and graphene fairy circles: a bottom-up approach for the formation of nanocorrals. ACS Nano 13(5): 5559-5571. https://dx.doi.org/10.1021/acsnano.9b00439
In: ACS Nano. AMER CHEMICAL SOC: Washington. ISSN 1936-0851; e-ISSN 1936-086X, meer
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| Author keywords |
covalent functionalization; electrochemical grafting cyclic voltammetry; chronoamperometry; nanoconfined self-assembly; on-surface polymerization |
| Auteurs | | Top |
- Phan, T.H., meer
- Van Gorp, H., meer
- Li, Z., meer
- Huynh, T.M.T., meer
- Fujita, Y., meer
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- Verstraete, L., meer
- Eyley, S., meer
- Thielemans, W., meer
- Uji-i, H., meer
- Hirsch, B.E., meer
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- Mertens, S.F.L., meer
- Greenwood, J., meer
- Ivasenko, O., meer
- De Feyter, S., meer
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| Abstract |
A convenient covalent functionalization approach and nanopatterning method of graphite and graphene is developed. In contrast to expectations, electrochemically activated dediazotization of a mixture of two aryl diazonium compounds in aqueous media leads to a spatially inhomogeneous functionalization of graphitic surfaces, creating covalently modified surfaces with quasi-uniform spaced islands of pristine graphite or graphene, coined nanocorrals. Cyclic voltammetry and chronoamperometry approaches are compared. The average diameter (45–130 nm) and surface density (20–125 corrals/μm2) of these nanocorrals are tunable. These chemically modified nanostructured graphitic (CMNG) surfaces are characterized by atomic force microscopy, scanning tunneling microscopy, Raman spectroscopy and microscopy, and X-ray photoelectron spectroscopy. Mechanisms leading to the formation of these CMNG surfaces are discussed. The potential of these surfaces to investigate supramolecular self-assembly and on-surface reactions under nanoconfinement conditions is demonstrated. |
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