Hybrid Fibrillar Xerogels with Unusual Magnetic Properties. - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Langmuir Année : 2016

Hybrid Fibrillar Xerogels with Unusual Magnetic Properties.

Athmane Boulaoued
  • Fonction : Auteur
Jean-Louis Bantignies
  • Fonction : Auteur
  • PersonId : 996155
Rozenn Le Parc
  • Fonction : Auteur
  • PersonId : 996156
Christophe Goze-Bac
Philippe Mésini
Thi-Thanh-Tam Nguyen
  • Fonction : Auteur
Abdelaziz Al Ouahabi
  • Fonction : Auteur
Pierre Lutz
  • Fonction : Auteur
Jean-Michel Guenet

Résumé

We report on the preparation of a hybrid nanomaterial made up of 1D filaments of an antiferromagnetic self-assembling bicopper complex encapsulated in polymer nanofibrils. The encapsulation process is achieved through the heterogeneous nucleation of the growth of polymer fibrils obtained by thermoreversible gelation as shown by calorimetry experiments. Neutron scattering experiments confirm that the filaments of a bicopper complex retain their 1D character after encapsulation in the fibrils. Superconducting quantum interference device experiments show that the bicopper complex, originally in the gapped spin state in the 3D bulk mesophase, displays a gapless behavior once encapsulated. Extended absorption fine structure and infrared results further highlight the difference in the molecular arrangement of the bicopper complex between the bulk mesophase and the encapsulated state, which may account for the magnetic behavior. This material, which is largely disordered, differs totally from the usual magnetic systems where this effect is observed only on highly crystalline systems with long-range order. Also, this hybrid material is very easy to prepare from its basic constituents and can be further processed in many ways.
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Dates et versions

hal-01417110 , version 1 (15-12-2016)

Identifiants

Citer

Athmane Boulaoued, Jean-Louis Bantignies, Rozenn Le Parc, Christophe Goze-Bac, Philippe Mésini, et al.. Hybrid Fibrillar Xerogels with Unusual Magnetic Properties.. Langmuir, 2016, 32 (49), pp.13193-13199. ⟨10.1021/acs.langmuir.6b03572⟩. ⟨hal-01417110⟩
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