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Dimensional measurement of TiO$_2$ (Nano) particles by SAXS and SEM in powder form

Najoua Bouzakher-Ghomrasni 1 Olivier Tache 2 Jocelyne Leroy 3 Nicolas Feltin 1 Fabienne Testard 2 Carine Chivas-Joly 1
2 LIONS - Laboratoire Interdisciplinaire sur l'Organisation Nanométrique et Supramoléculaire
NIMBE UMR 3685 - Nanosciences et Innovation pour les Matériaux, la Biomédecine et l'Energie (ex SIS2M)
3 LICSEN - Laboratoire Innovation en Chimie des Surfaces et NanoSciences
NIMBE UMR 3685 - Nanosciences et Innovation pour les Matériaux, la Biomédecine et l'Energie (ex SIS2M)
Abstract : The market for nano-additive materials has been growing exponentially since 2012, with almost 5040 consumer products containing nanoparticles in 2021. In parallel, the increasing recommendations, definitions and legislations underline the need for traceability of manufactured nanoparticles and for methods able to identify and quantify the “nano” dimensional character in manufactured product. From a multi-technic approach, this paper aims to compare the mesurands extracted from SAX/BET (specific surface area) and SEM (diameter equivalent to a projected surface area) on different TiO$_2$ powder issued from referenced, synthesized materials, raw materials (additives) and extracted materials from manufactured products. The influence of various parameters such as the anisotropic factor, the interaction between particles, the size distribution and the extraction steps are discussed to illustrate their impact on the diameter values issued from two different measurands. These results illustrate the difficulties in (nano)particles characterization. SEM and SAXS are complementary technics depending on the level of dimensional characterization required.
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Submitted on : Wednesday, June 30, 2021 - 11:26:23 AM
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Najoua Bouzakher-Ghomrasni, Olivier Tache, Jocelyne Leroy, Nicolas Feltin, Fabienne Testard, et al.. Dimensional measurement of TiO$_2$ (Nano) particles by SAXS and SEM in powder form. Talanta, Elsevier, inPress, 234, pp.122619. ⟨10.1016/j.talanta.2021.122619⟩. ⟨cea-03274569⟩

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