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Synthèse et propriétés de monocristaux, de poudres, films minces ou hétérostructures

Etudes à l'interface avec la matière biologique

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Nouvelle publication FM2N T. Nguyen

Publié le 15 octobre 2015
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Communiqué 11 mars 2015

Le papier "Structural evolution, magnetic properties and electrochemical response of MnCo2O4 nanosheet film" a été publié dans RSC Advances

Vous trouverez http://pubs.rsc.org/en/Content/ArticleLanding/2015/RA/c5ra03047a#!divAbstract">ici le papier de Tuyen Nguyen. Voici l'abstract:

"MnCo2O4 spinel oxide nanosheets were prepared via electrodeposition and post thermal annealing on stainless steel substrates. The structural transformation of an electrodeposited hydroxide phase into a spinel phase was achieved by thermal annealing at different temperatures (250 °C, 350 °C, 450 °C and 650 °C). The surface morphology of the films revealed the presence of a nanosheet percolation network that was converted into nanoplatelets after annealing at 650 °C. The nanosheets are composed of nanocrystals and the crystal size of the MnCo2O4 spinel oxide increased from 10 nm after 250 °C annealing to 100 nm after 650 °C annealing, in which a twinning was observed. The magnetic transition temperature also increased from 101 K to 176 K for the films annealed at 250 °C and 650 °C, respectively. The spinel films displayed specific capacitance values above 400 Fg-1 at 1 Ag-1, making these spinel oxides promising pseudocapacitive materials."
http://pubs.rsc.org/en/Content/ArticleLanding/2015/RA/c5ra03047a#!divAbstract">DOI: 10.1039/c5ra03047a
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mise à jour le 16 octobre 2019

  • Tutelle CNRS
  • Tutelle Grenoble INP
Université Grenoble Alpes