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Micromachining-compatible, facile fabrication of polymer nanocomposite spin crossover actuators
- Source :
- Advanced Functional Materials, Advanced Functional Materials, 2018, 28 (29), pp.1801970. ⟨10.1002/adfm.201801970⟩, Advanced Functional Materials, Wiley, 2018, 28 (29), pp.1801970. ⟨10.1002/adfm.201801970⟩
- Publication Year :
- 2018
- Publisher :
- HAL CCSD, 2018.
-
Abstract
- International audience; [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.
- Subjects :
- Materials science
Polymer nanocomposite
Matériaux
Mechanical properties
Nanocomposite materials
02 engineering and technology
010402 general chemistry
01 natural sciences
[SPI.MAT]Engineering Sciences [physics]/Materials
Biomaterials
Micrometre
Micro‐electromechanical systems (MEMS)
Nanocomposite Spin
Spin crossover
Electrochemistry
Polymer substrate
Composite material
Mécanique: Mécanique des structures [Sciences de l'ingénieur]
[SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics
Micromachining-Compatible
chemistry.chemical_classification
Micro et nanotechnologies/Microélectronique [Sciences de l'ingénieur]
Soft actuators
Polymer
021001 nanoscience & nanotechnology
Condensed Matter Physics
Piezoresistive effect
0104 chemical sciences
Electronic, Optical and Magnetic Materials
Surface micromachining
chemistry
Resist
Spin crossover complexes
Crossover Actuators
0210 nano-technology
Subjects
Details
- Language :
- English
- ISSN :
- 1616301X and 16163028
- Database :
- OpenAIRE
- Journal :
- Advanced Functional Materials, Advanced Functional Materials, 2018, 28 (29), pp.1801970. ⟨10.1002/adfm.201801970⟩, Advanced Functional Materials, Wiley, 2018, 28 (29), pp.1801970. ⟨10.1002/adfm.201801970⟩
- Accession number :
- edsair.doi.dedup.....34806cd4fee5e7c8c8c5f779df0c6c62