title: Cooperative spin crossover phenomena in [Fe(NH2trz)3](tosylate)2 nanoparticles.
abstract: Nanoparticles of the [Fe(NH(2)trz)(3)](tosylate)(2) spin crossover complex of 3-4 nm size were synthesized and dispersed in a nonionic surfactant. This colloidal system exhibits thermal spin crossover phenomena associated with a virtually first order transition. By thermal treatment the colloidal suspension can be transformed into a fibrous structure forming a gel.
authors.affiliation: Laboratoire de Chimie de Coordination, CNRS UPR-8241 and Université de Toulouse, UPS, INP, F-31077 Toulouse, France.
authors.forename: Alexey
authors.initials: A
authors.lastname: Tokarev
authors.forename: Lionel
authors.initials: L
authors.lastname: Salmon
authors.forename: Yannick
authors.initials: Y
authors.lastname: Guari
authors.forename: William
authors.initials: W
authors.lastname: Nicolazzi
authors.forename: Gábor
authors.initials: G
authors.lastname: Molnár
authors.forename: Azzedine
authors.initials: A
authors.lastname: Bousseksou