Spin crossover composite materials for electrothermomechanical actuators
- 5 March 2014
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of Materials Chemistry C
- Vol. 2 (16), 2949-2955
- https://doi.org/10.1039/c4tc00267a
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.Keywords
Funding Information
- European Commission (NanoSCOpe 328078)
- L' Agence Nationale de la Recherche (ANR-12-IS07-0003-01)
This publication has 27 references indexed in Scilit:
- Molecular actuators driven by cooperative spin-state switchingNature Communications, 2013
- Crystallography and spin-crossover. A view of breathing materialsDalton Transactions, 2013
- Giant-Amplitude, High-Work Density Microactuators with Phase Transition Activated Nanolayer BimorphsNano Letters, 2012
- Fabrication of robust electrothermal MEMS devices using aluminum–tungsten bimorphs and polyimide thermal isolationJournal of Micromechanics and Microengineering, 2012
- Dynamics of photothermally driven VO2-coated microcantileversJournal of Applied Physics, 2011
- Molecular spin crossover phenomenon: recent achievements and prospectsChemical Society Reviews, 2011
- Colossal thermal-mechanical actuation via phase transition in single-crystal VO2 microcantileversJournal of Applied Physics, 2010
- Single-Laser-Shot-Induced Complete Bidirectional Spin Transition at Room Temperature in Single Crystals of (FeII(pyrazine)(Pt(CN)4))Journal of the American Chemical Society, 2008
- Effect of Heat Transfer on Materials Selection for Bimaterial Electrothermal ActuatorsJournal of Microelectromechanical Systems, 2008
- Piezoelectric and ferroelectric films for microelectronic applicationsMaterials Science and Engineering B, 2003