Composites "Nanostructured oxides of Prussian blue analogue" : new material for the information storage.
type: Dataset
description: The Prussian blue analogues (CoFe PBA) have attracted growing interest owing to the tunability of their magnetic properties by external stimuli that make them good candidates for future optical memories or switching devices.This study need a processing step to elaborate a nanocomposite material with full control on the stoichiometry, the size, the shape and the organisation of PBA particles.Our strategie consit to precipitate photomagnetic Prussian blue analogue in the nanoporosite. Our main idea is to use mesoporous silica monoliths as template for the precipitation of the PBA in order to control the size and the shape of the nanoparticles. A silica monolith contaigning cobalt ions in the hexogonal structuraction have been obtained. The method have been extended to another structuration ( wormlike, cubic and lamallar). A termal traitement at 500°C in air have been optimised to remove the copolymer and to obtain the nanoreacteur. During the termal traitement the cobalt ion change the symmetry. A thermo-hydrolysis of the cobalt drives to the formation of monomer tetrahedron of cobalt.The precipitation of Prussian Blue Analogues is realized by impregnation with a solution of potassium hexacyanoferrate (III). The parameters of the impregnation have to be finely controlled in order to obtain nanocrystals of Co-Fe wihout alkalin cations and nanocrystrals of CoFe with two cation rubidium. A photomagnetic nanocrystrals have been obtained.
identifier: NNT: 2012PA112378
issued: 2026-05-10T21:58:43.535011
language: fr
modified: 2026-05-10T21:58:43.535016
contact point: Organization
  fn: CCSD
keyword: alkalin-cation
keyword: analogue-du-bleu-de-prusse
keyword: cation-alcalin
keyword: chimothechemical-sciencesother
keyword: infoeu-reposemanticsdoctoralthesis
keyword: mesoporous-silica
keyword: monolithe-mesoporeux-ordonnee
keyword: nanocomposites
keyword: nanostructure-oxide
keyword: oxyde-nanostructuree
keyword: photomagnetic
keyword: photomagnetisme
keyword: procedes-sol-gel
keyword: prussian-blue-analogue
keyword: silicate
keyword: sol-gel-chemistry
keyword: spectroscopie-dabsorption-des-rayons-x
keyword: theses
keyword: x-ray-spectroscopy
landing page: https://theses.hal.science/tel-00829109

Composites "Nanostructured oxides of Prussian blue analogue" : new material for the information storage.
type: Distribution
format: HTML
issued: 2026-05-10T21:58:43.572337
modified: 2026-05-10T21:58:43.507057
access URL: https://theses.hal.science/tel-00829109

test_moissonnage_selune
type: Agent