MagnetoSperm: A microrobot that navigates using weak magnetic fields

    Research output: Contribution to journalArticleAcademicpeer-review

    77 Citations (Scopus)
    46 Downloads (Pure)

    Abstract

    In this work, a propulsion system similar in motion to a sperm-cell is investigated. This system consists of a structure resembling a sperm-cell with a magnetic head and a flexible tail of 42 μm and 280 μm in length, respectively. The thickness, length, and width of this structure are 5.2 μm, 322 μm, and 42 μm, respectively. The magnetic head includes a 200 nm-thick cobalt-nickel layer. The cobalt-nickel layer provides a dipole moment and allows the flexible structure to align along oscillating weak (less than 5mT) magnetic field lines, and hence generates a propulsion thrust force that overcomes the drag force. The frequency response of this system shows that the propulsion mechanism allows for swimming at an average speed of 158 ± 32 μm/s at alternating weak magnetic field of 45 Hz. In addition, we experimentally demonstrate controlled steering of the flexible structure towards reference positions.
    Original languageUndefined
    Pages (from-to)223701
    Number of pages4
    JournalApplied physics letters
    Volume22
    Issue number2
    DOIs
    Publication statusPublished - 2 Jun 2014

    Keywords

    • EWI-25730
    • IR-94249
    • METIS-309899

    Cite this

    @article{058107cd85924cff9548191f2fa6b677,
    title = "MagnetoSperm: A microrobot that navigates using weak magnetic fields",
    abstract = "In this work, a propulsion system similar in motion to a sperm-cell is investigated. This system consists of a structure resembling a sperm-cell with a magnetic head and a flexible tail of 42 μm and 280 μm in length, respectively. The thickness, length, and width of this structure are 5.2 μm, 322 μm, and 42 μm, respectively. The magnetic head includes a 200 nm-thick cobalt-nickel layer. The cobalt-nickel layer provides a dipole moment and allows the flexible structure to align along oscillating weak (less than 5mT) magnetic field lines, and hence generates a propulsion thrust force that overcomes the drag force. The frequency response of this system shows that the propulsion mechanism allows for swimming at an average speed of 158 ± 32 μm/s at alternating weak magnetic field of 45 Hz. In addition, we experimentally demonstrate controlled steering of the flexible structure towards reference positions.",
    keywords = "EWI-25730, IR-94249, METIS-309899",
    author = "I.S.M. Khalil and Dijkslag, {Herman C.} and Leon Abelmann and Sarthak Misra",
    note = "eemcs-eprint-25730",
    year = "2014",
    month = "6",
    day = "2",
    doi = "10.1063/1.4880035",
    language = "Undefined",
    volume = "22",
    pages = "223701",
    journal = "Applied physics letters",
    issn = "0003-6951",
    publisher = "American Institute of Physics",
    number = "2",

    }

    MagnetoSperm: A microrobot that navigates using weak magnetic fields. / Khalil, I.S.M.; Dijkslag, Herman C.; Abelmann, Leon; Misra, Sarthak.

    In: Applied physics letters, Vol. 22, No. 2, 02.06.2014, p. 223701.

    Research output: Contribution to journalArticleAcademicpeer-review

    TY - JOUR

    T1 - MagnetoSperm: A microrobot that navigates using weak magnetic fields

    AU - Khalil, I.S.M.

    AU - Dijkslag, Herman C.

    AU - Abelmann, Leon

    AU - Misra, Sarthak

    N1 - eemcs-eprint-25730

    PY - 2014/6/2

    Y1 - 2014/6/2

    N2 - In this work, a propulsion system similar in motion to a sperm-cell is investigated. This system consists of a structure resembling a sperm-cell with a magnetic head and a flexible tail of 42 μm and 280 μm in length, respectively. The thickness, length, and width of this structure are 5.2 μm, 322 μm, and 42 μm, respectively. The magnetic head includes a 200 nm-thick cobalt-nickel layer. The cobalt-nickel layer provides a dipole moment and allows the flexible structure to align along oscillating weak (less than 5mT) magnetic field lines, and hence generates a propulsion thrust force that overcomes the drag force. The frequency response of this system shows that the propulsion mechanism allows for swimming at an average speed of 158 ± 32 μm/s at alternating weak magnetic field of 45 Hz. In addition, we experimentally demonstrate controlled steering of the flexible structure towards reference positions.

    AB - In this work, a propulsion system similar in motion to a sperm-cell is investigated. This system consists of a structure resembling a sperm-cell with a magnetic head and a flexible tail of 42 μm and 280 μm in length, respectively. The thickness, length, and width of this structure are 5.2 μm, 322 μm, and 42 μm, respectively. The magnetic head includes a 200 nm-thick cobalt-nickel layer. The cobalt-nickel layer provides a dipole moment and allows the flexible structure to align along oscillating weak (less than 5mT) magnetic field lines, and hence generates a propulsion thrust force that overcomes the drag force. The frequency response of this system shows that the propulsion mechanism allows for swimming at an average speed of 158 ± 32 μm/s at alternating weak magnetic field of 45 Hz. In addition, we experimentally demonstrate controlled steering of the flexible structure towards reference positions.

    KW - EWI-25730

    KW - IR-94249

    KW - METIS-309899

    U2 - 10.1063/1.4880035

    DO - 10.1063/1.4880035

    M3 - Article

    VL - 22

    SP - 223701

    JO - Applied physics letters

    JF - Applied physics letters

    SN - 0003-6951

    IS - 2

    ER -