The Molecular Mechanism of Iron(III) Oxide Nucleation
MetadataShow full item record
© 2016 American Chemical Society.A molecular understanding of the formation of solid phases from solution would be beneficial for various scientific fields. However, nucleation pathways are still not fully understood, whereby the case of iron (oxyhydr)oxides poses a prime example. We show that in the prenucleation regime, thermodynamically stable solute species up to a few nanometers in size are observed, which meet the definition of prenucleation clusters. Nucleation then is not governed by a critical size, but rather by the dynamics of the clusters that are forming at the distinct nucleation stages, based on the chemistry of the linkages within the clusters. This resolves a longstanding debate in the field of iron oxide nucleation, and the results may generally apply to oxides forming via hydrolysis and condensation. The (molecular) understanding of the chemical basis of phase separation is paramount for, e.g., tailoring size, shape and structure of novel nanocrystalline materials.
Showing items related by title, author, creator and subject.
Wang, L.; Putnis, Christine; Ruiz-Agudo, E.; Hövelmann, J.; Putnis, Andrew (2015)Adsorption and subsequent immobilization of orthophosphate on iron oxides is of considerable importance in soil fertility and eutrophication studies. Here, in situ atomic force microscopy (AFM) has been used to probe the ...
Wang, L.; Putnis, Christine; Hövelmann, J.; Putnis, Andrew (2018)© 2018 by the author. Licensee MDPI, Basel, Switzerland. Adsorption and subsequent precipitation of dissolved phosphates on iron oxides, such as hematite and goethite, is of considerable importance in predicting the ...
Gebauer, Denis; Kellermeier, Matthias; Gale, Julian; Bergstrom, Lennart; Colfen, Helmut (2014)Crystallisation is at the heart of various scientific disciplines, but still the understanding of the molecular mechanisms underlying phase separation and the formation of the first solid particles in aqueous solution is ...