Lattice defects in sub-micrometer spin-crossover crystals studied by electron diffraction
Idioma
en
Article de revue
Este ítem está publicado en
Journal of Physical Chemistry Letters. 2023, vol. 14, n° 36, p. 8100–8106
American Chemical Society
Resumen en inglés
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 ...Leer más >
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< Leer menos
Palabras clave en inglés
Crystals
Diffraction
Lattices
Nanoparticles
Phase transitions
Proyecto ANR
Investigation du mécanisme et de l'efficacité de chauffage photothermique dans des nanoparticules uniques - ANR-22-CE09-0033
Orígen
Importado de HalCentros de investigación