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

The Devices

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, 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

Acknowledgements

• PEI Energy Grand Challenge• Departments of Chemistry and Mechanical

and Aerospace Engineering

• Professor Mike McAlpine• Manu, Jeff, Booyeon, Kevin• Thanh, Kellye, Yong, Yao