Bidirectional actuation of ferrofluid using micropatterned planar coils assisted by bias magnetic fields
This paper reports a ferrofluid control method that enables both attraction and repelling of ferrofluid on micropatterned planar coils coupled with permanent magnets. A combinational use of a controlled magnetic field and a bias field is shown to provide lateral forces that attract/repel the ferrofl...
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my.utm.466422017-09-17T08:31:48Z http://eprints.utm.my/id/eprint/46642/ Bidirectional actuation of ferrofluid using micropatterned planar coils assisted by bias magnetic fields Assadsangabi, Babak Mohamed Ali, Mohamed Sultan Sultan Takahata, Kenichi TA Engineering (General). Civil engineering (General) This paper reports a ferrofluid control method that enables both attraction and repelling of ferrofluid on micropatterned planar coils coupled with permanent magnets. A combinational use of a controlled magnetic field and a bias field is shown to provide lateral forces that attract/repel the ferrofluid to/from the coil depending on the direction of the current passed through the coil. Active mirror devices whose mirrors are switched by ferrofluids are developed as a proof-of-concept of the actuation method toward the application to imaging devices and optical switches. The planar devices lithographically fabricated to have arrays of mirror-coil cells are used to demonstrate activation/deactivation of individual cells enabled by the bidirectional radial motion of the ferrofluid layer with ∼100 μm thickness. The static and dynamic behaviors of the ferrofluid in the devices are characterized through an image processing approach. Multiple mirror cells are selectively and simultaneously operated to show enhanced ferrofluid control uniquely available with the two modes of the actuation as well as to demonstrate pattern generation with the arrays. 2012 Article PeerReviewed Assadsangabi, Babak and Mohamed Ali, Mohamed Sultan Sultan and Takahata, Kenichi (2012) Bidirectional actuation of ferrofluid using micropatterned planar coils assisted by bias magnetic fields. Sensors And Actuators, A: Physical, 173 (1). pp. 219-226. ISSN 0924-4247 http://dx.doi.org/10.1016/j.sna.2011.11.007 |
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TA Engineering (General). Civil engineering (General) Assadsangabi, Babak Mohamed Ali, Mohamed Sultan Sultan Takahata, Kenichi Bidirectional actuation of ferrofluid using micropatterned planar coils assisted by bias magnetic fields |
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This paper reports a ferrofluid control method that enables both attraction and repelling of ferrofluid on micropatterned planar coils coupled with permanent magnets. A combinational use of a controlled magnetic field and a bias field is shown to provide lateral forces that attract/repel the ferrofluid to/from the coil depending on the direction of the current passed through the coil. Active mirror devices whose mirrors are switched by ferrofluids are developed as a proof-of-concept of the actuation method toward the application to imaging devices and optical switches. The planar devices lithographically fabricated to have arrays of mirror-coil cells are used to demonstrate activation/deactivation of individual cells enabled by the bidirectional radial motion of the ferrofluid layer with ∼100 μm thickness. The static and dynamic behaviors of the ferrofluid in the devices are characterized through an image processing approach. Multiple mirror cells are selectively and simultaneously operated to show enhanced ferrofluid control uniquely available with the two modes of the actuation as well as to demonstrate pattern generation with the arrays. |
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Article |
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Assadsangabi, Babak Mohamed Ali, Mohamed Sultan Sultan Takahata, Kenichi |
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Assadsangabi, Babak Mohamed Ali, Mohamed Sultan Sultan Takahata, Kenichi |
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Assadsangabi, Babak |
title |
Bidirectional actuation of ferrofluid using micropatterned planar coils assisted by bias magnetic fields |
title_short |
Bidirectional actuation of ferrofluid using micropatterned planar coils assisted by bias magnetic fields |
title_full |
Bidirectional actuation of ferrofluid using micropatterned planar coils assisted by bias magnetic fields |
title_fullStr |
Bidirectional actuation of ferrofluid using micropatterned planar coils assisted by bias magnetic fields |
title_full_unstemmed |
Bidirectional actuation of ferrofluid using micropatterned planar coils assisted by bias magnetic fields |
title_sort |
bidirectional actuation of ferrofluid using micropatterned planar coils assisted by bias magnetic fields |
publishDate |
2012 |
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http://eprints.utm.my/id/eprint/46642/ http://dx.doi.org/10.1016/j.sna.2011.11.007 |
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1643652095866306560 |
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13.188404 |