Issue 16, 2014

Spin crossover composite materials for electrothermomechanical actuators

Abstract

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.

Graphical abstract: Spin crossover composite materials for electrothermomechanical actuators

Supplementary files

Article information

Article type
Paper
Submitted
10 feb 2014
Accepted
02 mar 2014
First published
05 mar 2014

J. Mater. Chem. C, 2014,2, 2949-2955

Author version available

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 and A. Bousseksou, J. Mater. Chem. C, 2014, 2, 2949 DOI: 10.1039/C4TC00267A

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