Spin crossover composite materials for electrothermomechanical actuators

I.A. Gural'Skiy, C.M. Quintero, J.S. Costa, P. Demont, G. Molnár, L. Salmon, H.J. Shepherd, A. Bousseksou

Research output: Contribution to journalArticlepeer-review

77 Citations (SciVal)


Composites of the spin crossover complex [Fe(trz)(H-trz)2](BF4) (H-trz = 1,2,4-4H-triazole and trz = 1,2,4-triazolato) dispersed in a poly(methylmethacrylate) (PMMA) matrix were synthesized and investigated for their spin crossover properties by optical reflectivity, Raman spectroscopy and calorimetry. These composite films were used to fabricate bilayer cantilevers that can perform efficient and tuneable mechanical actuation based on the spin transition. A prototype device that uses the spin transition phenomenon to convert electrical energy into mechanical motion through Joule heating is described. This device is used to perform oscillatory actuation driven by a modulated current. The ability to tune the performance of this electromechanical system is demonstrated by varying the working temperature, the applied ac current and its frequency.

Original languageEnglish
Pages (from-to)2949-2955
Number of pages7
JournalJournal of Materials Chemistry C
Issue number16
Early online date5 Mar 2014
Publication statusPublished - 28 Apr 2014


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