Nanomirrors of this design were fabricated by e-beam vacuum depositing gold and nickel through a 20 micron polycarbonate shadow mask with mono-disperse, track-etched 10 micron holes.
UCLANRF 50kV 103mm x9 00k SE(U) 5/9/06
Fig. 7. SEM image of a 10 micron nickel-gold magnetic nanomirror
2.3 Tracking Nanomirror Motion
We accurately measured the nanometer-scale motion of a prototype nanomirror using a soft gel substrate to simulate the cell surface (Fig. 8). We recorded nanomirror indentation into the gel of up to 40 nm, which varied linearly with magnetic field strength. The gel substrate has a Young’s modulus of approximately 1 MPa, therefore we estimate that we were able to generate approximately 1 nN of force on the nanomiror.
Indentation v. electromagnet current
Net force est. lOe-9 N
NANOMIRROR" Rare earth magnet particle
on polymer gel imaged by white light interferometer
Fig. 8. Testing force generation by nanomirrors on a gel substrate
Proc. of SPIE Vol. 6293 629301-6