Investigation of the Effect of Spin Crossover on the Static and Dynamic Properties of MEMS Microcantilevers Coated with Nanocomposite Films of [Fe(Htrz)2(trz)](BF4)@P(VDF-TrFE)

José Elías Angulo-Cervera (1, 2) , Mario Piedrahita-Bello (1, 3) , Fabrice Mathieu (4) , Thierry Leichle (2, 5) , Liviu Nicu (2) , Lionel Salmon (1) , Gábor Molnár (1) , Azzedine Bousseksou (1)

1 LCC - Laboratoire de chimie de coordination
2 LAAS-MEMS - Équipe Microsystèmes électromécaniques
3 LAAS-GEPETTO - Équipe Mouvement des Systèmes Anthropomorphes
4 LAAS-I2C - Service Instrumentation Conception Caractérisation
5 Georgia Tech Lorraine [Metz]

We used a spray-coating process to cover silicon microcantilevers with ca. 33 wt% [Fe(Htrz)2(trz)](BF4)@P(VDF70-TrFE30) nanocomposite thin films of 1500 nm thickness. The bilayer cantilevers were then used to investigate the thermomechanical properties of the composites through a combined static and dynamic flexural analysis. The out-of-plane flexural resonance frequencies were used to assess the Young’s modulus of the spray-coated films (3.2 GPa). Then, the quasi-static flexural bending data allowed us to extract the actuation strain (1.3%) and an actuation stress (7.7 MPa) associated with the spin transition in the composite.

Mots clés: Spin crossover; MEMS; Mechanical properties

Domaines: Chimie de coordination

José Elías Angulo-Cervera, Mario Piedrahita-Bello, Fabrice Mathieu, Thierry Leichle, Liviu Nicu, et al.. Investigation of the Effect of Spin Crossover on the Static and Dynamic Properties of MEMS Microcantilevers Coated with Nanocomposite Films of [Fe(Htrz)2(trz)](BF4)@P(VDF-TrFE). Magnetochemistry, 2021, 7 (8), pp.114. ⟨10.3390/magnetochemistry7080114⟩. ⟨hal-03329761⟩