Thompson, S and Demyk, K and Day, S and Evans, A and Leroux, H and Depecker, C and Parker, J and Connor, L and Wilhelm, H and Cibin, G (2016) Amorphous silicate nanoparticles with controlled Fe-Mg pyroxene compositions. Journal of Non-Crystalline Solids, 447. 255 - 261. ISSN 1873-4812

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Abstract

The production of amorphous pyroxene nanoparticles (~ 20 nm) with controlled Fe-Mg content is described. Homogenous particle compositions closely matching required target stoichiometries are obtained by drying a precursor gel under high vacuum conditions. The silicate nature of the particles is characterised using TEM, synchrotron radiation and FTIR. No oxide phase separation occurs, even at high Fe concentration. Structural domains exist within the nanoparticles that are typically ten times smaller than the physical particle size consistent with either a core-shell, or, random network with multiple embedded domains, particle structure. Thermal annealing below the crystallisation temperature allows the ordered domain size to be further reduced by a factor of ~ 2.

Item Type: Article
Uncontrolled Keywords: iron and magnesium silicate; nanoparticles; sol-gel; amorphous material
Subjects: ?? Amorphous Material ??
?? Iron and Magnesium Silicate ??
?? Nanoparticles ??
Q Science > QB Astronomy
?? Sol-gel ??
Divisions: Faculty of Natural Sciences > School of Physical and Geographical Sciences
Depositing User: Symplectic
Date Deposited: 06 Jul 2016 09:14
Last Modified: 06 Jul 2016 09:14
URI: http://eprints.keele.ac.uk/id/eprint/1989

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