Magnetostrictive devices for wireless power harvesting and transport by Y7xT503

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									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?
  From the Natural World                    From the Human Body




                                     T. Starner, IBM Syst. J., 1996, 35, 618–629.
http://www.superstock.co.uk/stock-
photos-images/1555R-308348

   Scavenging power for small scale energy systems
     Using piezoelectric materials



      Y. Qi, J. Kim, T. D. Nguyen, B. Lisko, P. K. Purohit, M.
      C. McAlpine. Nano Lett. 11, 1331-1336 (2011).


• Piezomagnetism: mechanical
  strain --> voltage
• BUT: fragile; necessitates
  fabricating gold electrodes

                                                                 http://www.physikinstrumente.com/en/pro
                                                                 ducts/prdetail.php?sortnr=400600.00
    Magnetomechanical effects
             Piezomagnetism
                                                     Magnetostriction




                                                   http://www.sensorland.com/


P. Lukashev, R. Sabirianov, and K. Belashchenko.
Physical Review B, 78:184414, 2008.
                    The Devices
Cr2O3 – a room temperature piezomagnetic
                        Cr/Cr2O3                        Cr2O3
               E-beam    Ni        3 hr @ 550C           Ni
SiO2                     Cr                              Cr
                         SiO2                            SiO2


        PDMS

       Cr2O3
                           FeCl3                 Cr2O3
        Ni
        Cr                                       PDMS
        SiO2
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                 R. C. O’Handley, J. K.
Robotics and Biomimetics,                   Huang, D. C. Bono, and J.
pages 195–200, 2005.                        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

								
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