Abstract
Hexagonal sheets of colloidal particles self-assemble in a biaxial electric field and can be made permanent by thermal annealing. One can also rapidly switch the suspension structure from isotropic, to 1D ‘strings’ and 2D ‘sheets’, which is useful for applications that require anisotropic suspension properties. Thus, multiaxial fields offer a flexible way to manipulate colloidal interactions and their self-assembled structures.
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