Refillable and magnetically actuated drug delivery system using pear-shaped viscoelastic membrane

Hongyun So, Young Ho Seo, Albert P. Pisano

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


We report a refillable and valveless drug delivery device actuated by an external magnetic field for on-demand drug release to treat localized diseases. The device features a pear-shaped viscoelastic magnetic membrane inducing asymmetrical deflection and consecutive touchdown motion to the bottom of the dome-shaped drug reservoir in response to a magnetic field, thus achieving controlled discharge of the drug. Maximum drug release with 18 ± 1.5 μg per actuation was achieved under a 500 mT magnetic flux density, and various controlled drug doses were investigated with the combination of the number of accumulated actuations and the strength of the magnetic field.
Original languageEnglish (US)
Pages (from-to)044119
Issue number4
StatePublished - Jul 2014
Externally publishedYes

Bibliographical note

KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: This work was supported by the KAUST Global Collaborative Research grant under the Academic Excellence Alliance program. The authors also thank the UC Berkeley Marvell Nanolab and Biomolecular Nanotechnology Center where all devices were fabricated.
This publication acknowledges KAUST support, but has no KAUST affiliated authors.


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