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Thermal transformations of manufactured nanomaterials as a proposed proxy for ageing

Briffa, S. M.; Lynch, I.; Trouillet, V. 1; Bruns, M. 1; Hapiuk, D.; Valsami-Jones, E.
1 Karlsruhe Nano Micro Facility (KNMF), Karlsruher Institut für Technologie (KIT)

Ageing is an important part of a manufactured nanomaterial's life cycle and can be considered as a transformation over time. It is particularly relevant to nanomaterials (NMs) because they are more reactive than their bulk counterparts and therefore are likely to undergo more significant or faster transformations with time. The conditions upon exposure of a NM to the environment, e.g. temperature, humidity and redox, will all individually affect ageing, as well as time. In experimental simulations, time has to be substituted by a proxy that makes timescales more realistic. Thermal ageing accelerates the normal ageing processes of NMs and thus elevated temperatures can be used to simulate prolonged ageing, allowing access to information on the long-term effects of NM ageing within a shorter time. Similar approaches are utilised in experimental simulation of protein fibrillation, for example, where processes that naturally occur over decades are accelerated to days or hours. In this work, time and temperature dependent studies were carried out on a fully characterised library of laboratory synthesised comparable polyvinylpyrrolidone (PVP) capped NMs (with core compositions of ceria, copper oxide and zinc oxide) and a commercially available uncoated cerium dioxide NM, to assess their transformations. ... mehr

Verlagsausgabe §
DOI: 10.5445/IR/1000084892
Veröffentlicht am 30.07.2018
DOI: 10.1039/C7EN00738H
Zitationen: 3
Web of Science
Zitationen: 3
Zitationen: 2
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Angewandte Materialien – Energiespeichersysteme (IAM-ESS)
Karlsruhe Nano Micro Facility (KNMF)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2018
Sprache Englisch
Identifikator ISSN: 2051-8153, 2051-8161
KITopen-ID: 1000084892
HGF-Programm 47.02.08 (POF III, LK 01) Zellpopul. Biofunk.Oberflächen IAM-ESS
Weitere HGF-Programme 49.02.07 (POF III, LK 02) XPS
Erschienen in Environmental science / Nano
Verlag Royal Society of Chemistry (RSC)
Band 5
Heft 7
Seiten 1618–1627
Vorab online veröffentlicht am 18.05.2018
Nachgewiesen in Scopus
Web of Science
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