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  • Formation of polymorphs and pores in small nanocrystalline iron oxide particles

Formation of polymorphs and pores in small nanocrystalline iron oxide particles

A novel chemical vapor synthesis reactor design is used to control the pore-particle mesostructure and investigate the pore formation mechanism through the variation of residence time in oxygen. This enables the exploitation of the Kirkendall effect at the nanoscale to generate ultrasmall pores in small nanocrystalline iron oxide particles. Detailed structural characterization and quantitative data analysis of complementary high resolution transmission electron microscopy images, X-ray diffractograms, nitrogen sorption isotherms and X-ray absorption spectra provide a consistent comprehensive picture of the hollow nanoparticles from the local to the microstructure. The pore formation mechanism seems to play a key role for β-Fe2O3 polymorph formation.

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Date Issued:
12.09.2022
URN:
urn:nbn:de:hbz:465-20231127-091144-5
DOI:
10.1038/s41598-022-19276-4
Language:
English
Type of Resource:
Text
Collection:
E-Publications
Subject categories of the Deutsche Nationalbibliografie:
610 Medical sciences Medicine
Hosting institution:
Faculty of Engineering, Maschinenbau und Verfahrenstechnik, Institute for Energy and Materials Processes (EMPI), Nanoparticle Process Technology (NPPT)
funding:

The publication of this article was supported by the Publication Fund of the University of Duisburg-Essen.

Open Access funding enabled and organized by Projekt DEAL.

Work was funded by the Deutsche Forschungsgemeinschaft (DFG) in the scope of the research group 2284, project number: 262219004.

Info on primary publication:

Levish, A., Winterer, M. Formation of polymorphs and pores in small nanocrystalline iron oxide particles. Sci Rep 12, 15291 (2022). https://doi.org/10.1038/s41598-022-19276-4

Published: 12 September 2022

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Version of Record / Verlagsversion

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