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  Combined experimental and theoretical approach to the kinetics of magnetite crystal growth from primary particles

Widdrat, M., Schneck, E., Reichel, V., Baumgartner, J., Bertinetti, L., Habraken, W., et al. (2017). Combined experimental and theoretical approach to the kinetics of magnetite crystal growth from primary particles. The Journal of Physical Chemistry Letters, 8(6), 1132-1136. doi:10.1021/acs.jpclett.6b02977.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002D-2EA1-7 Version Permalink: http://hdl.handle.net/21.11116/0000-0003-F75A-2
Genre: Journal Article

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 Creators:
Widdrat, Marc1, Author              
Schneck, Emanuel2, Author              
Reichel, Victoria1, Author              
Baumgartner, Jens1, Author              
Bertinetti, Luca3, Author              
Habraken, Wouter4, Author              
Bente, Klaas1, Author              
Fratzl, Peter5, Author              
Faivre, Damien1, Author              
Affiliations:
1Damien Faivre, Biomaterialien, Max Planck Institute of Colloids and Interfaces, Max Planck Society, ou_1863290              
2Emanuel Schneck, Biomaterialien, Max Planck Institute of Colloids and Interfaces, Max Planck Society, ou_2074300              
3Luca Bertinetti (Indep. Res.), Biomaterialien, Max Planck Institute of Colloids and Interfaces, Max Planck Society, ou_2231637              
4Wouter Habraken (Indep. Res.), Biomaterialien, Max Planck Institute of Colloids and Interfaces, Max Planck Society, ou_2231638              
5Peter Fratzl, Biomaterialien, Max Planck Institute of Colloids and Interfaces, Max Planck Society, ou_1863294              

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 Abstract: It is now recognized that nucleation and growth of crystals can occur not only by the addition of solvated ions but also by accretion of nanoparticles, in a process called nonclassical crystallization. The theoretical framework of such processes has only started to be described, partly due to the lack of kinetic or thermodynamic data. Here, we study the growth of magnetite nanoparticles from primary particles—nanometer-sized amorphous iron-rich precursors—in aqueous solution at different temperatures. We propose a theoretical framework to describe the growth of the nanoparticles and model both a diffusion-limited and a reaction-limited pathway to determine which of these best describes the rate-limiting step of the process. We show that, based on the measured iron concentration and the related calculated concentration of primary particles at the steady state, magnetite growth is likely a reaction-limited process, and within the framework of our model, we propose a phase diagram to summarize the observations.

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 Dates: 2017-02-222017
 Publication Status: Published in print
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 Identifiers: DOI: 10.1021/acs.jpclett.6b02977
PMID: 0517
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Title: The Journal of Physical Chemistry Letters
  Abbreviation : J. Phys. Chem. Lett.
Source Genre: Journal
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Publ. Info: Washington, DC : American Chemical Society
Pages: - Volume / Issue: 8 (6) Sequence Number: - Start / End Page: 1132 - 1136 Identifier: ISSN: 1948-7185