Receptor-Mediated Self-Assembly of Multi-Component Magnetic Nanowires


  • This work was supported by DARPA/AFOSR (under grant number F49620-02-1-0307).


The directed orientation of ferromagnetic nanowires tethered to spatially controlled regions of a surface is reported. The Figure is a light microscope image of 9 μm-long, two-segment Au/Ni nanowires with a biotinylated Au segment tethered to patterned avidin tracks. The aspect ratio of the nickel segments is ∼ 50, so the magnetic easy axis is parallel to the wire axis. The nanowires have rotated to be parallel to an applied magnetic field.