Flexible magnetostrictive devices for wireless power harvesting and transport Ben Siegfried McAlpine Group Department of Mechanical and Aerospace Engineering Princeton University
What is Energy Harvesting? Scavenging power for small scale energy systems From the Human Body T. Starner, IBM Syst. J., 1996, 35, 618–629. From the Natural World photos-images/1555R
Using piezoelectric materials ducts/prdetail.php?sortnr= Piezomagnetism: mechanical strain --> voltage BUT: fragile; necessitates fabricating gold electrodes Y. Qi, J. Kim, T. D. Nguyen, B. Lisko, P. K. Purohit, M. C. McAlpine. Nano Lett. 11, (2011).
Magnetomechanical effects Piezomagnetism P. Lukashev, R. Sabirianov, and K. Belashchenko. Physical Review B, 78:184414, Magnetostriction
The Devices SiO 2 E-beam SiO 2 Cr/Cr 2 O 3 Ni Cr SiO 2 Cr 2 O 3 Ni Cr 3 550C SiO 2 Cr 2 O 3 Ni Cr PDMS FeCl 3 PDMS Cr 2 O 3 Cr 2 O 3 – a room temperature piezomagnetic
The Devices
Terfenol-D films are a little trickier…
Future Work Nail down transfer procedures Characterize magnetic properties using a high- resolution magnetometer Transfer to silk films Implant and test in animal tissue
Future Work Y. Zhang and G. Liu. IEEE International Conference on Robotics and Biomimetics, pages 195–200, R. C. O’Handley, J. K. Huang, D. C. Bono, and J. Simon. IEEE Sensors Journal, 8(1):57–62, January L. Wang and F.G. Yuan. SPIE Smart Structures and Materials International Symposium, March 2007
Acknowledgements PEI Energy Grand Challenge Departments of Chemistry and Mechanical and Aerospace Engineering Professor Mike McAlpine Manu, Jeff, Booyeon, Kevin Thanh, Kellye, Yong, Yao