Skip to Main content Skip to Navigation
Journal articles

Re-Appearance of Cooperativity in Ultra-Small Spin-Crossover [Fe(pz){Ni(CN) 4 }] Nanoparticles

Abstract : A reverse nanoemulsion technique was used for the elaboration of [Fe(pz){Ni(CN)4}] nanoparticles. Low‐temperature micellar exchange made it possible to elaborate ultra‐small nanoparticles with sizes down to 2 nm. When decreasing the size of the particles from 110 to 12 nm the spin transition shifts to lower temperatures, becomes gradual, and the hysteresis shrinks. On the other hand, a re‐opening of the hysteresis was observed for smaller (2 nm) particles. A detailed 57Fe Mössbauer spectroscopy analysis was used to correlate this unusual phenomenon to the modification of the stiffness of the nanoparticles thanks to the determination of their Debye temperature.
Document type :
Journal articles
Complete list of metadata
Contributor : INSA Toulouse SCD Connect in order to contact the contributor
Submitted on : Monday, February 18, 2019 - 4:26:59 PM
Last modification on : Wednesday, June 1, 2022 - 4:16:15 AM

Links full text



Haonan Peng, Simon Tricard, Gautier Félix, Gábor Molnár, William Nicolazzi, et al.. Re-Appearance of Cooperativity in Ultra-Small Spin-Crossover [Fe(pz){Ni(CN) 4 }] Nanoparticles. Angewandte Chemie International Edition, Wiley-VCH Verlag, 2014, 53 (41), pp.10894-10898. ⟨10.1002/anie.201406710⟩. ⟨hal-02023759⟩



Record views