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Effect of sonication on particle dispersion, administered dose and metal release of non-functionalized, non-inert metal nanoparticles
KTH Royal Institute of Technology, Sweden.
KTH Royal Institute of Technology, Sweden.
RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor, Life Science. KTH Royal Institute of Technology, Sweden.
KTH Royal Institute of Technology, Sweden.
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2016 (English)In: Journal of nanoparticle research, ISSN 1388-0764, E-ISSN 1572-896X, Vol. 18, no 9, article id 285Article in journal (Refereed) Published
Abstract [en]

In this study, we elucidate the effect of different sonication techniques to efficiently prepare particle dispersions from selected non-functionalized NPs (Cu, Al, Mn, ZnO), and corresponding consequences on the particle dose, surface charge and release of metals. Probe sonication was shown to be the preferred method for dispersing non-inert, non-functionalized metal NPs (Cu, Mn, Al). However, rapid sedimentation during sonication resulted in differences between the real and the administered doses in the order of 30–80 % when sonicating in 1 and 2.56 g/L NP stock solutions. After sonication, extensive agglomeration of the metal NPs resulted in rapid sedimentation of all particles. DLVO calculations supported these findings, showing the strong van der Waals forces of the metal NPs to result in significant NP agglomeration. Metal release from the metal NPs was slightly increased by increased sonication. The addition of a stabilizing agent (bovine serum albumin) had an accelerating effect on the release of metals in sonicated solutions. For Cu and Mn NPs, the extent of particle dissolution increased from <1.6 to ~5 % after sonication for 15 min. A prolonged sonication time (3–15 min) had negligible effects on the zeta potential of the studied NPs. In all, it is shown that it is of utmost importance to carefully investigate how sonication influences the physico-chemical properties of dispersed metal NPs. This should be considered in nanotoxicology investigations of metal NPs. Graphical Abstract: [Figure not available: see fulltext.]

Place, publisher, year, edition, pages
Springer, 2016. Vol. 18, no 9, article id 285
Keywords [en]
Aluminium, BSA, Copper, DLVO, Dosimetry, Manganese, Metal release, Nanoparticles, Particle dispersion, Particle size, Sonication, Zeta potential, Agglomeration, Aluminum, Body fluids, Dispersions, Metals, Van der Waals forces, Accelerating effect, Bovine serum albumins, Particle dissolution, Physicochemical property, Sonication techniques, Metal nanoparticles
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Other Chemistry Topics Materials Chemistry Physical Chemistry
Identifiers
URN: urn:nbn:se:ri:diva-27611DOI: 10.1007/s11051-016-3597-5Scopus ID: 2-s2.0-84988489851OAI: oai:DiVA.org:ri-27611DiVA, id: diva2:1059682
Available from: 2016-12-22 Created: 2016-12-21 Last updated: 2019-06-13Bibliographically approved

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