Resolution:
standard / ## Figure 2.
Magnetosome arrangement in magnetotactic bacteria. The magnified part shows how elastic protein fibers embed magnetite (Fe_{3}O_{4}) crystals in the cytoskeleton. Interaction of the magnetic dipole of the crystal
with external fields within its viscoelastic environment can be analyzed by our presented
theoretical model as a torsional nanoresonator shown on the right hand side. Magnetic
torque rotates the MNP around its center of mass. The rotational spring constant is
given by κ = kR, where k is the aggregate rigidity of the connecting protein fibers, and R is the radius of the MNP. Since the Reynold number of the MNP is very small, the
drag forces are given by Stokes’ law. Therefore, the rotational damping coefficient
is C = 6π ηR^{3}, where η is the viscosity of the surrounding fluid.
Javaheri |