Skip to Main content Skip to Navigation
Journal articles

Micromachining-compatible, facile fabrication of polymer nanocomposite spin crossover actuators

Abstract : [FeII(Htrz)2(trz)](BF4) spin crossover particles of 85 nm mean size are dispersed in an SU‐8 polymer matrix and spray‐coated onto silicon microcantilevers. The subsequent photothermal treatment of the polymer resist leads to micrometer thick, smooth, and homogeneous coatings, which exhibit well‐reproducible actuation upon the thermally induced spin transition. The actuation amplitude as a function of temperature is accurately determined by combining integrated piezoresistive detection with external optical interferometry, which allows for the assessment of the associated actuation force (9.4 mN), stress (28 MPa), strain (1.0%), and work density (140 mJ cm−3) through a stratified beam model. The dynamical mechanical characterization of the films evidences an increase of the resonance frequency and a concomitant decrease of the damping in the high‐temperature phase, which arises due to a combined effect of the thickness and mechanical property changes. The spray‐coating approach is also successfully extended to scale up the actuators for the centimeter range on a polymer substrate providing perspectives for biomimetic soft actuators.
Complete list of metadatas

Cited literature [38 references]  Display  Hide  Download
Contributor : Maria Dolores Manrique Juarez <>
Submitted on : Monday, January 28, 2019 - 11:37:03 AM
Last modification on : Tuesday, February 4, 2020 - 1:13:09 AM
Long-term archiving on: : Monday, April 29, 2019 - 3:44:38 PM


Files produced by the author(s)



María Manrique-Juárez, Fabrice Mathieu, Adrian Laborde, Sylvain Rat, Victoria Shalabaeva, et al.. Micromachining-compatible, facile fabrication of polymer nanocomposite spin crossover actuators. Advanced Functional Materials, Wiley, 2018, 28 (29), pp.1801970. ⟨10.1002/adfm.201801970⟩. ⟨hal-01816709⟩



Record views


Files downloads