Phase transfer of 1- and 2-dimensional Cd-based nanocrystals

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dc.identifier.uri Kodanek, Torben ger Banbela, Hadeel M. ger Naskar, Suraj ger Adel, Patrick ger Bigall, Nadja C. ger Dorfs, Dirk ger 2015-12-14T14:12:28Z 2015-12-14T14:12:28Z 2015-10-28
dc.identifier.citation Kodanek, Torben; Banbela, Hadeel M.; Naskar, Suraj; Adel, Patrick; Bigall, Nadja C.; Dorfs, Dirk: Phase transfer of 1- and 2-dimensional Cd-based nanocrystals. In: Nanoscale 7 (2015), Nr. 45, S. 19300-19309. DOI:
dc.description.abstract In this work, luminescent CdSe@CdS dot-in-rod nanocrystals, CdSe@CdS/ZnS nanorods as well as CdSe–CdS core–crown nanoplatelets were transferred into aqueous phase via ligand exchange reactions. For this purpose, bifunctional thiol-based ligands were employed, namely mercaptoacetic acid (MAA), 3-mercaptopropionic acid (MPA), 11-mercaptoundecanoic acid (MUA) as well as 2-(dimethylamino)ethanthiol (DMAET). Systematic investigations by means of photoluminescence quantum yield measurements as well as photoluminescence decay measurements have shown that the luminescence properties of the transferred nanostructures are affected by hole traps (induced by the thiol ligands themselves) as well as by spatial insulation and passivation against the environment. The influence of the tips of the nanorods on the luminescence is, however, insignificant. Accordingly, different ligands yield optimum results for different nanoparticle samples, mainly depending on the inorganic passivation of the respective samples. In case of CdSe@CdS nanorods, the highest emission intensities have been obtained by using short-chain ligands for the transfer preserving more than 50% of the pristine quantum yield of the hydrophobic nanorods. As opposed to this, the best possible quantum efficiency for the CdSe@CdS/ZnS nanorods has been achieved via MUA. The gained knowledge could be applied to transfer for the first time 2-dimensional CdSe–CdS core–crown nanoplatelets into water while preserving significant photoluminescence (up to 12% quantum efficiency). eng
dc.description.sponsorship Volkswagen foundation/ZN2916
dc.description.sponsorship BMBF/NanoMatFutur/03X5525
dc.description.sponsorship Hannover School for Nanotechnology
dc.description.sponsorship DFG/DO1580/2-1
dc.description.sponsorship DFG/DO1580/3-1)
dc.language.iso eng eng
dc.publisher Cambridge : Royal Society of Chemistry
dc.relation.ispartofseries Nanoscale 7 (2015), Nr. 45
dc.rights CC BY 3.0 Unported
dc.subject phase transfer eng
dc.subject nanocrystals eng
dc.subject cadmium eng
dc.subject Cd eng
dc.subject ligand exchange reactions eng
dc.subject Phasentransfer ger
dc.subject Nanokristalle ger
dc.subject Cadmium ger
dc.subject Cd ger
dc.subject Ligandenaustauschreaktion ger
dc.subject.ddc 540 | Chemie ger
dc.title Phase transfer of 1- and 2-dimensional Cd-based nanocrystals eng
dc.type article
dc.type Text
dc.relation.essn 2040-3372
dc.relation.issn 2040-3364
dc.bibliographicCitation.issue 45
dc.bibliographicCitation.volume 7 2015
dc.bibliographicCitation.firstPage 19300
dc.bibliographicCitation.lastPage 19309
dc.description.version publishedVersion
tib.accessRights frei zug�nglich

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