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. Author manuscript; available in PMC: 2012 Jul 28.
Published in final edited form as: Phys Rev Lett. 2010 Jan 4;104(1):016001. doi: 10.1103/PhysRevLett.104.016001

Figure 1.

Figure 1

(a): Magnetic nanorod (black cylinder next to white arrows) re-orients from perpendicular to parallel to the applied magnetic field, H. (b): tan φ(t) vs. t for the re-orientation of the nanorods at the interface of a 2 mg/ml albumin solution for various aging times. The nanorods reorient with an exponential response (dotted lines are fit to Eqn. 3, inset shows that ln(tan φ(t) vs. t is linear). The scatter in the data is due to the error in manual tracking (up to 1 degree). The inductance time of our magnetic coils ~ 0.02 s.