dc.contributor.author
Schlierf, Andrea
dc.contributor.author
Yang, Huafeng
dc.contributor.author
Gebremedhn, Elias
dc.contributor.author
Treossi, Emanuele
dc.contributor.author
Ortolani, Luca
dc.contributor.author
Chen, Liping
dc.contributor.author
Minoia, Andrea
dc.contributor.author
Morandi, Vittorio
dc.contributor.author
Samori, Paolo
dc.contributor.author
Casiraghi, Cinzia
dc.contributor.author
Beljonne, David
dc.contributor.author
Palermo, Vincenzo
dc.date.accessioned
2018-06-08T02:51:50Z
dc.date.available
2014-12-18T11:53:02.205Z
dc.identifier.uri
https://refubium.fu-berlin.de/handle/fub188/14010
dc.identifier.uri
http://dx.doi.org/10.17169/refubium-18207
dc.description.abstract
We study the mechanism of surface adsorption of organic dyes on graphene, and
successive exfoliation in water of these dye-functionalized graphene sheets. A
systematic, comparative study is performed on pyrenes functionalized with an
increasing number of sulfonic groups. By combining experimental and modeling
investigations, we find an unambiguous correlation between the graphene–dye
interaction energy, the molecular structure and the amount of graphene flakes
solubilized. The results obtained indicate that the molecular dipole is not
important per se, but because it facilitates adsorption on graphene by a
“sliding” mechanism of the molecule into the solvent layer, facilitating the
lateral displacement of the water molecules collocated between the aromatic
cores of the dye and graphene. While a large dipole and molecular asymmetry
promote the adsorption of the molecule on graphene, the stability and pH
response of the suspensions obtained depend on colloidal stabilization, with
no significant influence of molecular charging and dipole.
en
dc.rights.uri
http://www.rsc.org/AboutUs/Copyright/Authordeposition.asp
dc.title
Nanoscale insight into the exfoliation mechanism of graphene with organic dyes
dc.type
Wissenschaftlicher Artikel
dcterms.bibliographicCitation
Nanoscale. - 5 (2013), 10, S.S. 4205-4216
dc.identifier.sepid
34142
dc.title.subtitle
effect of charge, dipole and molecular structure
dcterms.bibliographicCitation.doi
10.1039/C3NR00258F
dcterms.bibliographicCitation.url
http://dx.doi.org/10.1039/c3nr00258f
refubium.affiliation
Physik
de
refubium.affiliation.other
Institut für Experimentalphysik
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refubium.mycore.fudocsId
FUDOCS_document_000000021492
refubium.resourceType.isindependentpub
no
refubium.mycore.derivateId
FUDOCS_derivate_000000004306
dcterms.accessRights.openaire
open access
dcterms.isPartOf.issn
2040-3364