Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7138358 | Sensors and Actuators A: Physical | 2012 | 6 Pages |
Abstract
Hybrid materials offer the unique possibility to combine different functionalities of each component to obtain new classes of actuators or sensors. The hybrid material presented here consists of a macroscopic Terfenol-D crystal and a functional nanocomposite layer attached to its surface. The functional nanocomposite layer is made of polymer and Au nanoparticles in a regime near to the percolation threshold and embedded just below the polymer surface. Magnetically induced strain in the highly magnetostrictive Terfenol-D crystal leads to a change in interparticle distance between the metal nanoparticles and hence a change in quantum tunnelling properties through the two dimensional network of the Au nanoparticles. The electrical resistance of the nanocomposite layer allows direct measurement of the magnetically induced strain with a maximum change of 6% and can thus be used as a feedback sensor for the magnetostrictive actuator.
Related Topics
Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
Amit Kulkarni, Bodo Henkel, Christoph Bechtold, Vladimir Zaporojtchenko, Thomas Strunskus, Eckhard Quandt, Franz Faupel,