Self-organized magnetic fields

On a side note, Ouskova and co-workers also reported that the composite of magnetic /i-FejOs nanorods in 5CB showed lower threshold voltages than pure 5CB, and that the sensitivity of the nematic liquid crystal to external magnetic fields was increased in the presence of such magnetic nanorods [451]. Finally, several groups interested in the macroscopic organization and orientation of nanorods also reported on the formation of a lyotropic liquid crystal phase induced by the self-assembly of polymer-coated semiconductor nanorods [453—457], which might be used to improve the device performance, for example, of solar cells. 

The self-organization phenomena in colloids of magnetic nanopartides (ferro-fluids) induced by external magnetic fields has attracted considerable attention on the basis of importance from both fundamental and applied perspectives [31]. However, the lack of systematic investigations, combined with some contradictory findings, have led to these materials remaining a relative novelty. Wirtz et cd. [32] have suggested that the formation of macroscopic 1-D periodic patterns composed of... 

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