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We present here an experimental, strictly one-dimensional rotational system, made by using single magnetic Janus particles in a static magnetic field. These particles were half-coated with a thin metallic film, and by turning on a properly oriented external static magnetic field, we monitor the rotational Brownian motion of single particles, in sol...
We present an experimental, one-dimensional, Brownian rotation system in which the free rotation is confined to a single axis. Control of the rotational diffusion of a single microparticle, or particle aggregate, around a chosen axis, was performed by using a static 1.0 mT external magnetic field. The confined object rotated freely around the chose...
Many experimental observations of 3D random rotations of particles have been interpreted using Einstein's 1D Gaussian solution. However, in contrast to 1D, 3D rotations are non-commutative, and cannot rigorously be described by Einstein's model. To test the potential discrepancy between theory and experiment, we monitor a particle rotating freely a...