Notice of RetractionWater tweezers for pariticles gagging

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.

In recent years, the microfabrication has grown rapidly, and one of the key technique and important basis is pariticle trapping and manipulation. Now, it develops mostly on light, electricity and plasma to make it. The text raises a fire-new concept of “water tweezers”: when fistulous micro water-jet acts on the face of pariticle, the block of viscosity that causes a change of flow velocity and pressure distribution of fluid microaggregate in boundary layer, will make an abruption on the face of fluid microaggregate and pariticle somewhere, then reverse flow following it, ultimately forms symmetrical karman vortex. The face tension of liquid level, the support force of karman vortex and circumferential flow lift act together on pariticle and give birth to gagging to it, that forming “water tweezers” finally. Based on the theory analysis to “water tweezers”, by adopting singularity method, the establishment of stream function and velocity potential model of water-jet provides basis for the trapping to partiricle by using “water tweezers”.