Flexible magnetostrictive devices for wireless power harvesting and transport Ben Siegfried McAlpine Group Department of Mechanical and Aerospace Engineering.
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Flexible magnetostrictive devices for wireless power harvesting and
transportBen SiegfriedMcAlpine Group
Department of Mechanical and Aerospace EngineeringPrinceton 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
http://www.superstock.co.uk/stock-photos-images/1555R-308348
Using piezoelectric materials
http://www.physikinstrumente.com/en/products/prdetail.php?sortnr=400600.00
• 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, 1331-1336 (2011).
Magnetomechanical effects
Piezomagnetism
P. Lukashev, R. Sabirianov, and K. Belashchenko. Physical Review B, 78:184414, 2008.
Magnetostriction
http://www.sensorland.com/
The Devices
SiO2
E-beam
SiO2
Cr/Cr2O3
NiCr
SiO2
Cr2O3
NiCr
3 hr @ 550C
SiO2
Cr2O3
NiCr
PDMS
FeCl3
PDMS
Cr2O3
Cr2O3 – a room temperature piezomagnetic
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, 2005.
R. C. O’Handley, J. K. Huang, D. C. Bono, and J. Simon. IEEE Sensors Journal, 8(1):57–62, January 2008.
L. Wang and F.G. Yuan. SPIE Smart Structures and Materials International Symposium, March 2007
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