Show simple item record

dc.contributor.author
La Zara, Damiano
dc.contributor.author
Bailey, Maximilian R.
dc.contributor.author
Hagedoorn, Peter-Leon
dc.contributor.author
Benz, Dominik
dc.contributor.author
Quayle, Michael J.
dc.contributor.author
Folestad, Staffan
dc.contributor.author
van Ommen, J. Ruud
dc.date.accessioned
2020-09-02T13:09:53Z
dc.date.available
2020-08-20T09:39:44Z
dc.date.available
2020-09-02T13:09:53Z
dc.date.issued
2020-07-24
dc.identifier.issn
2574-0970
dc.identifier.other
10.1021/acsanm.0c01158
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/432094
dc.identifier.doi
10.3929/ethz-b-000432094
dc.description.abstract
In this work, we report molecular layer deposition (MLD) of ultrathin poly(ethylene terephthalate) (PET) films on gram-scale batches of ultrafine particles for the first time. TiO2 P25 nanoparticles (NPs) are coated up to 50 cycles in an atmospheric-pressure fluidized-bed reactor at ∼150 °C using terephthaloyl chloride and ethylene glycol as precursors. Ex-situ diffuse reflectance infrared Fourier transform spectroscopy, thermogravimetric analysis, and transmission electron microscopy show the linear growth at ∼0.05 nm/cycle of uniform and conformal PET films, which are unattainable with conventional wet-phase approaches. The sub-nanoscale and nanoscale PET films not only suppress the photocatalytic activity of TiO2 NPs by hindering the access of water and reactant molecules to the TiO2 surface but also improve the dispersibility of TiO2 NPs in both organic and aqueous media. Still, the bulk optical properties, electronic structure, and surface area of TiO2 are essentially unaffected by the MLD process. This study demonstrates the industrial relevance of MLD to simultaneously suppress the photoactivity and enhance the dispersibility of commercial TiO2 P25 nanopowders, which is crucial for their use for example as UV-screening agents in sunscreens and as white pigments in paints. Moreover, by rapidly modifying the surface properties of particles in a controlled manner at the sub-nanometer scale, particle MLD can serve many other applications ranging from nanofluids to emulsions to polymer nanocomposites.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
American Chemical Society
en_US
dc.rights.uri
http://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subject
molecular layer deposition
en_US
dc.subject
sub-nanoscale
en_US
dc.subject
surface engineering
en_US
dc.subject
organic coating
en_US
dc.subject
polyethylene terephthalate
en_US
dc.subject
TiO2
en_US
dc.subject
inorganic−organic nanocomposite
en_US
dc.subject
suppressed photoactivity
en_US
dc.subject
improved dispersion
en_US
dc.title
Sub-nanoscale Surface Engineering of TiO2 Nanoparticles by Molecular Layer Deposition of Poly(ethylene terephthalate) for Suppressing Photoactivity and Enhancing Dispersibility
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
dc.date.published
2020-06-05
ethz.journal.title
ACS Applied Nano Materials
ethz.journal.volume
3
en_US
ethz.journal.issue
7
en_US
ethz.journal.abbreviated
ACS Appl. Nano Mater.
ethz.pages.start
6737
en_US
ethz.pages.end
6748
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.identifier.wos
ethz.identifier.scopus
ethz.publication.place
Washington, DC
en_US
ethz.publication.status
published
en_US
ethz.date.deposited
2020-08-20T09:39:48Z
ethz.source
WOS
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2020-09-02T13:10:05Z
ethz.rosetta.lastUpdated
2021-02-15T16:54:24Z
ethz.rosetta.versionExported
true
ethz.COinS
ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.atitle=Sub-nanoscale%20Surface%20Engineering%20of%20TiO2%20Nanoparticles%20by%20Molecular%20Layer%20Deposition%20of%20Poly(ethylene%20terephthalate)%20for%20Suppressing%20Photo&rft.jtitle=ACS%20Applied%20Nano%20Materials&rft.date=2020-07-24&rft.volume=3&rft.issue=7&rft.spage=6737&rft.epage=6748&rft.issn=2574-0970&rft.au=La%20Zara,%20Damiano&Bailey,%20Maximilian%20R.&Hagedoorn,%20Peter-Leon&Benz,%20Dominik&Quayle,%20Michael%20J.&rft.genre=article&rft_id=info:doi/10.1021/acsanm.0c01158&
 Search print copy at ETH Library

Files in this item

Thumbnail

Publication type

Show simple item record