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dc.contributor.author
Isa, Lucio
dc.contributor.author
Calzolari, Davide C.E.
dc.contributor.author
Pontoni, Diego
dc.contributor.author
Gillich, Torben
dc.contributor.author
Nelson, Adrienne
dc.contributor.author
Zirbs, Ronald
dc.contributor.author
Sánchez-Ferrer, Antoni
dc.contributor.author
Mezzenga, Raffaele
dc.contributor.author
Reimhult, Erik
dc.date.accessioned
2023-07-13T09:24:33Z
dc.date.available
2017-06-10T15:04:08Z
dc.date.available
2023-07-13T09:24:33Z
dc.date.issued
2013
dc.identifier.issn
1744-683X
dc.identifier.issn
1744-6848
dc.identifier.other
10.1039/C3SM27367A
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/64841
dc.identifier.doi
10.3929/ethz-b-000064841
dc.description.abstract
Self-assembly of core–shell nanoparticles (NPs) at liquid–liquid interfaces is rapidly emerging as a strategy for the production of novel nano-materials bearing vast potential for applications, including membrane fabrication, drug delivery and emulsion stabilization. The development of such nanoparticle-based materials is facilitated by structural characterization techniques that are able to monitor in situ the self-assembly process during its evolution. Here, we present an in situ high-energy X-ray reflectivity study of the evolution of the vertical position (contact angle) and inter-particle spacing of core–shell iron oxide–poly(ethylene glycol) (PEG) nanoparticles adsorbing at flat, horizontal buried water–n-decane interfaces. The results are compared with time-resolved interfacial tension data acquired with the conventional pendant drop method. We investigate in particular the effect of varying polymer molecular weights (2–5 kDa) and architectures (linear vs. dendritic) on the self-assembly process and the final structure of the interfacially adsorbed NP monolayers. Linear PEG particles adsorb more rapidly than dendritic PEG ones and reach full interface coverage and stable NP monolayer structure, while dendritic PEG particles undergo a slower adsorption process, which is not completed within the experimental time window of ∼6 hours. All NPs are highly hydrophilic with effective contact angles that depend weakly on PEG molecular weight and architecture. Conversely, the in-plane NP separation depends strongly on PEG molecular weight. The measured inter-particle separation at full interface coverage yields low iron oxide core content, indicating a strong deformation and flattening of the linear PEG shell at the interface. This finding is supported by modeling and has direct implications for materials fabrication, e.g. for the realization of core–shell NP membranes by in situ cross-linking of the polymer shells.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
Royal Society of Chemistry
en_US
dc.rights.uri
http://creativecommons.org/licenses/by/3.0/
dc.title
Core-shell nanoparticle monolayers at planar liquid-liquid interfaces
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution 3.0 Unported
dc.date.published
2013-02-12
ethz.title.subtitle
Effects of polymer architecture on the interface microstructure
en_US
ethz.journal.title
Soft Matter
ethz.journal.volume
9
en_US
ethz.journal.issue
14
en_US
ethz.pages.start
3789
en_US
ethz.pages.end
3797
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.identifier.wos
ethz.identifier.nebis
005061136
ethz.publication.place
Cambridge
en_US
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02070 - Dep. Gesundheitswiss. und Technologie / Dep. of Health Sciences and Technology::02701 - Inst.f. Lebensmittelwiss.,Ernährung,Ges. / Institute of Food, Nutrition, and Health::03857 - Mezzenga, Raffaele / Mezzenga, Raffaele
en_US
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02070 - Dep. Gesundheitswiss. und Technologie / Dep. of Health Sciences and Technology::02701 - Inst.f. Lebensmittelwiss.,Ernährung,Ges. / Institute of Food, Nutrition, and Health::03857 - Mezzenga, Raffaele / Mezzenga, Raffaele
ethz.date.deposited
2017-06-10T15:06:15Z
ethz.source
ECIT
ethz.identifier.importid
imp5936507074fb891791
ethz.ecitpid
pub:103175
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2017-07-15T08:29:51Z
ethz.rosetta.lastUpdated
2024-02-03T01:39:34Z
ethz.rosetta.versionExported
true
ethz.COinS
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