Notice of RetractionNanoparticle control of slurry flow in microchannel

Notice of Retraction

After careful and considered review of the content of this paper by a duly constituted expert committee, this paper has been found to be in violation of IEEE´s Publication Principles.

We hereby retract the content of this paper. Reasonable effort should be made to remove all past references to this paper.

The presenting author of this paper has the option to appeal this decision by contacting TPII@ieee.org.

We clarify the mechanism of the formation a free surface of slurry flow in a microchannel with a simple hydrodynamics model. A slurry is a solid-liquid and pseudoplastic fluid among non-Newtonian fluids [1, 2]. We investigate the free-surface formation of a slurry as a function of flow velocity. The shape of the free surface of the slurry is determined by the internal pressure, external pressure, and surface tension of the slurry. We focus here on the above mechanism and slurry particles, and propose and demonstrate magnetic field gradient control of free-surface formation. First, we demonstrate that the free surface of a single magnetic slurry consisting of Fe₃O₄ nanoparticles and an organic solvent can be deformed by a magnetic field gradient. Next, we demonstrate the control of the free-surface formation of a nonmagnetic ceramic slurry under a magnetic field gradient by adding a magnetic slurry. With this means of controlling the free-surface formation of slurry flow, we can completely fill microstructured molds with slurries. This can lead to defect-free compacts with microstructured shapes.