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Sous presse. Epreuves corrigées par l'auteur. Disponible en ligne depuis le samedi 6 juillet 2019
Doi : 10.1016/j.crci.2019.06.003
Received : 19 February 2019 ;  accepted : 6 June 2019
Effect of alkali cations on the photomagnetic behavior of CoFe Prussian blue analogue nanoparticles embedded in ordered mesoporous silica
 

Laura Altenschmidt , Giulia Fornasieri, Eric Rivière, François Brisset, Romuald Saint-Martin, Anne Bleuzen
 Institut de chimie moléculaire et des matériaux d'Orsay, CNRS, Université Paris-Sud, Université Paris-Saclay, 91400 Orsay, France 

Corresponding author.∗∗Corresponding author.
Abstract

The size of CoFe Prussian blue analogue nanoparticles containing either rubidium or cesium cations was controlled by their formation through a nucleation process inside the calibrated pores of an ordered mesoporous silica matrix. The corresponding references were synthesized in powder form using the same ratio between the metal species in the reaction solution. The obtained samples were characterized via infrared (IR) spectroscopy, X-ray diffraction, and magnetometry to understand the differences arising from the size reduction and the nature of the inserted alkali cation. We were able to show that the nature of the cation has a significant influence on the photoswitching properties at the macroscale in the powders. However, on the nanoscale, the influence of the surface contribution becomes more prominent and cooperative effects disappear, resulting in a new role of the alkali cation in the photomagnetic properties.

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Keywords : Prussian blue analogues, Nanoparticles, Ordered mesoporous silica, Photomagnetism




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