Ferrofluidic actuation of liquid metal for radio-frequency applications

Ferrofluidic actuation of liquid metal for radio-frequency applications

For access to this article, please select a purchase option:

Buy article PDF
(plus tax if applicable)
Buy Knowledge Pack
10 articles for £75.00
(plus taxes if applicable)

IET members benefit from discounts to all IET publications and free access to E&T Magazine. If you are an IET member, log in to your account and the discounts will automatically be applied.

Learn more about IET membership 

Recommend Title Publication to library

You must fill out fields marked with: *

Librarian details
Your details
Why are you recommending this title?
Select reason:
Electronics Letters — Recommend this title to your library

Thank you

Your recommendation has been sent to your librarian.

A new method is presented for actuating liquid metals, based on the physical deformation of ferrofluid in response to an applied magnetic field. Using this ferrofluidic actuation, a liquid-metal slug was moved through a channel at an average velocity of 15.6 mm/s. The hydrocarbon-based ferrofluid exhibits negligible loss from 50 MHz to 20 GHz, and can thus serve as an alternative carrier fluid to hydrochloric acid or sodium hydroxide for liquid-metal-based reconfigurable radio-frequency circuits.


    1. 1)
    2. 2)
    3. 3)
    4. 4)
    5. 5)
    6. 6)
      • 6. Gough, R.C., Morishita, A.M., Dang, J.H., et al: ‘Rapid electrocapillary deformation of liquid metal with reversible shape retention’, Micro Nano Syst. Lett., 2015, 3, (4), pp. 19, doi: 10.1186/ s40486-015-0017-z.
    7. 7)
    8. 8)
      • 8. Jeon, J., Lee, J.B., Chung, S.K., et al: ‘On-demand magnetic manipulation of liquid metal in microfluidic channels for electrical switching applications’, Lab Chip, 2017, 379, (1), pp. 982991, doi: 10.1039/c6lc01255h.
    9. 9)
    10. 10)
    11. 11)
    12. 12)
    13. 13)
    14. 14)
    15. 15)
    16. 16)
    17. 17)
      • 17. Gough, R.C., Dang, J.H., Morishita, A.M., et al: ‘Frequency-tunable slot antenna using continuous electrowetting of liquid metal’. IEEE MTT-S Int. Microwave Symp. Digest, Tampa, FL, USA, June 2014, pp. 13, doi: 10.1109/MWSYM.2014.6848565.
    18. 18)
      • 18. Zhang, G.B., Gough, R.C., Moorefield, M.R., et al: ‘An electrically actuated liquid-metal switch with metastable switching states’. IEEE MTT-S Int. Microwave Symp. Digest, San Francisco, CA, USA, May 2016, pp. 14, doi: 10.1109/MWSYM.2016.7539989.
    19. 19)
      • 19. Pozar, D.M.: ‘Microwave engineering’ (Wiley & Sons, Hoboken, NJ, USA, 2012, 4th edn.).

Related content

This article has following corresponding article(s):
in brief
This is a required field
Please enter a valid email address