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Magnetic NiFe/Au barcode nanowires with self-powered motion
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View: Figures


Image of FIG. 1.
FIG. 1.

(Color online) XRD patterns of the NiFe and NiFe/Au NWs in AAO nanotemplate; (a) Ni-rich NiFe (bar diagram: NiFe3 JCPDS); (b) NiFe; (c) Fe-rich NiFe NWs (bar diagram: NiFe JCPDS); (d) Ni-rich NiFe/Au (bar diagram: Au JCPDS); (e) NiFe/Au; and (f) Fe-rich NiFe/Au BNWs.

Image of FIG. 2.
FIG. 2.

(Color online) TEM analysis of free-standing NiFe/Au BNWs. (a) Bright-field image with elemental line scan: Au, Fe, and Ni; (b) Elemental mapping together with bright-field imaging: Au, Fe, and Ni; and (c) High-resolution TEM image and SAED pattern (inset) from the NiFe-Au interface.

Image of FIG. 3.
FIG. 3.

(Color online) Magnetic hysteresis loops of the NiFe/Au BNWs with a diameter of ∼200 nm and AR (segmental length/diameter ratio) ∼0.7 in AAO nanotemplate. (a) Fe-rich NiFe/Au; (b) NiFe/Au; and (c) Ni-rich NiFe/Au. The blue solid line and red solid line indicate the magnetic field parallel and perpendicular to the axis, respectively.

Image of FIG. 4.
FIG. 4.

(Color online) Snapshots of NiFe/Au BNWs in aqueous H2O2. (a) A BNW without a magnet; (b) A BNW under a constant magnetic field (H = 300 G) perpendicular to the substrate (H from a permanent magnet placed under the substrate); (c) Linking of the BNWs; and (d) A BNW in rotating motion without a magnet. Scale bars: 5 μm.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Magnetic NiFe/Au barcode nanowires with self-powered motion