HU, Yaowei; PICHER, Matthieu; TRAN, Ngoc Minh; PALLUEL, Marlène; STOLERIU, Laurentiu; DARO, Nathalie; MORNET, Stephane; ENACHESCU, Cristian; FREYSZ, Eric; BANHART, Florian; CHASTANET, Guillaume

doi:10.1002/adma.202105586

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Licencia de uso del documento

HU, Yaowei
Institut de Physique et Chimie des Matériaux de Strasbourg [IPCMS]

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

TRAN, Ngoc Minh
Laboratoire Ondes et Matière d'Aquitaine [LOMA]

Idioma

Article de revue

Este ítem está publicado en

Advanced Materials. 2021-10-03, vol. 33, n° 52, p. 2105586 (10 p.)

Wiley-VCH Verlag

Resumen en inglés

Spin Crossover (SCO) is a promising switching phenomenon when implemented in electronic devices as molecules, thin films or nanoparticles. Among the properties modulated along this phenomenon, optically induced mechanical changes are of tremendous importance as they can work as fast light-induced mechanical switches or allow to investigate and control microstructural strains and fatigability. The development of characterization techniques probing 2 nanoscopic behaviour with high spatio-temporal resolution allows to trigger and visualize such mechanical changes of individual nanoscopic objects. Here we use Ultrafast Transmission Electron Microscopy (UTEM) to precisely probe the length changes of individual switchable nanoparticles induced thermally by nanosecond laser pulses. This allows us to reveal the mechanisms of spin switching, leading to the macroscopic expansion of SCO materials. This study was conducted on individual pure SCO nanoparticles and SCO nanoparticles encapsulating gold nanorods that serve for plasmonic heating under laser pulses. Length changes are compared with time-resolved optical measurements performed on an assembly of these particles.< Leer menos

Palabras clave en inglés

ultrafast electron microscopy

single nanoparticle detection

spin crossover

timeresolved spectroscopy

nanohybrids

DOI

http://dx.doi.org/10.1002/adma.202105586

Proyecto ANR

Nanomatériaux hybrides pour une commutation photo-thermique contrôlée - ANR-17-CE09-0010
Microscopie électronique ultrarapide en transmission - ANR-11-EQPX-0041

Orígen

Importado de Hal

Centros de investigación

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