“…These require an additional Brownian equation of motion for the orientation of the symmetry axis of the rod, while the rotations around this axis are ignored. The rotations of anisotropic colloids, which represent the most generalised class of rigid particles, is more difficult to simulate by the Brownian Dynamics approach and has hardly been explored in the literature [41,78,84,101,127,135,140,169,171]. One difficulty arises from the degeneracy, and the resulting strong singularities in the equation of motion, attached to the commonly used rotational coordinate systems, such as the Euler angles [74].…”