MBA, Hilaire; PICHER, Matthieu; DARO, Nathalie; MARCHIVIE, Mathieu; GUIONNEAU, Philippe; CHASTANET, Guillaume; BANHART, Florian

doi:10.1021/acs.jpclett.3c01942

Métadonnées

Afficher la notice complète

Licence d’utilisation du document

MBA, Hilaire
Institut de Physique et Chimie des Matériaux de Strasbourg [IPCMS]

PICHER, Matthieu
Institut de Physique et Chimie des Matériaux de Strasbourg [IPCMS]

DARO, Nathalie
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

Langue

Article de revue

Ce document a été publié dans

Journal of Physical Chemistry Letters. 2023, vol. 14, n° 36, p. 8100–8106

American Chemical Society

Résumé en anglais

Spin-crossover particles of [Fe(Htrz)2trz](BF4) with sizes of some hundred nanometers are studied by in-situ electron microscopy. Despite their high radiation sensitivity, it was possible to analyze the particles in imaging and diffraction so that a detailed analysis of crystallographic defects in individual particles became possible. The presence of one or several tilt boundaries, where the tilt axis is the direction of the polymer chains, is detected in each particle. An in-situ exposure of the particles to temperature variations or short laser pulses to induce the spin crossover shows that the defect structure only changes after a high number of transformations between the low-spin and high-spin phases. The observations are explained by the anisotropy of the atomic architecture within the crystals that facilitates defects between weakly linked crystallographic planes. TOC graphic< Réduire

Mots clés en anglais

Crystals

Diffraction

Lattices

Nanoparticles

Phase transitions

DOI

http://dx.doi.org/10.1021/acs.jpclett.3c01942

Project ANR

Investigation du mécanisme et de l'efficacité de chauffage photothermique dans des nanoparticules uniques - ANR-22-CE09-0033

Origine

Importé de hal

Unités de recherche

Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB) - UMR 5026