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. 2020 Mar 24;10(3):592. doi: 10.3390/nano10030592

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© 2020 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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HAADF-STEM images (a,e,i) and corresponding spectral images of Ti (green), Al (pink), and Si (blue) obtained by EDX of pearlescent pigments, showing (a–d) aggregated TiO₂ particles on top of mica, (e–h) a TiO₂ aggregate containing small parts of mica, and (i–l) separate TiO₂ aggregates and a mica flake.