Spray-Drying and Atomic Layer Deposition: Complementary Tools toward Fully Orthogonal Control of Bulk Composition and Surface Identity of Multifunctional Supraparticles.

Autor: Müssig S; Department of Chemistry and Pharmacy, Friedrich-Alexander University ErlangenNürnberg (FAU), Egerlandstraße 1, 91058, Erlangen, Germany., Koch VM; Chair 'Chemistry of Thin Film Materials' (CTFM), Friedrich-Alexander University ErlangenNürnberg (FAU), IZNF, Cauerstraße 3, 91058, Erlangen, Germany., Collados Cuadrado C; Department of Chemical and Bioengineering, Institute of Separation Science and Technology, Friedrich-Alexander-University Erlangen-Nürnberg, Egerlandstr. 3, 91058, Erlangen, Germany., Bachmann J; Chair 'Chemistry of Thin Film Materials' (CTFM), Friedrich-Alexander University ErlangenNürnberg (FAU), IZNF, Cauerstraße 3, 91058, Erlangen, Germany.; Institute of Chemistry, Saint Petersburg State University, Universitetskii pr. 26, Saint Petersburg, 198504, Russian Federation., Thommes M; Department of Chemical and Bioengineering, Institute of Separation Science and Technology, Friedrich-Alexander-University Erlangen-Nürnberg, Egerlandstr. 3, 91058, Erlangen, Germany., Barr MKS; Chair 'Chemistry of Thin Film Materials' (CTFM), Friedrich-Alexander University ErlangenNürnberg (FAU), IZNF, Cauerstraße 3, 91058, Erlangen, Germany., Mandel K; Department of Chemistry and Pharmacy, Friedrich-Alexander University ErlangenNürnberg (FAU), Egerlandstraße 1, 91058, Erlangen, Germany.; Fraunhofer Institute for Silicate Research ISC, Neunerplatz 2, 97082, Würzburg, Germany.
Jazyk: angličtina
Zdroj: Small methods [Small Methods] 2022 Jan; Vol. 6 (1), pp. e2101296. Date of Electronic Publication: 2021 Nov 21.
DOI: 10.1002/smtd.202101296
Abstrakt: Spray-drying is a scalable process enabling one to assemble freely chosen nanoparticles into supraparticles. Atomic layer deposition (ALD) allows for controlled thin film deposition of a vast variety of materials including exotic ones that can hardly be synthesized by wet chemical methods. The properties of coated supraparticles are defined not only by the nanoparticle material chosen and the nanostructure adjusted during spray-drying but also by surface functionalities modified by ALD, if ALD is capable of modifying not only the outer surfaces but also surfaces buried inside the porous supraparticle. Simultaneously, surface accessibility in the porous supraparticles must be ensured to make use of all functionalized surfaces. In this work, iron oxide supraparticles are utilized as a model substrate as their magnetic properties enable the use of advanced magnetic characterization methods. Detailed information about the structural evolution upon individual ALD cycles of aluminium oxide, zinc oxide and titanium dioxide are thereby revealed and confirmed by gas sorption analyses. This demonstrates a powerful and versatile approach to freely designing the functionality of future materials by combination of spray-drying and ALD.
(© 2021 The Authors. Small Methods published by Wiley-VCH GmbH.)
Databáze: MEDLINE
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