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Anisotropic Hexagonal Particles Induced by the Double-Solvent Swelling Method.

Non-spherical anisotropic particles, as basic building blocks, have been catching much attention in the past decades. However, it is still a challenge to produce non-spherical particles by traditional approaches. Here, we reported a facile method to fabricate hexagonal particles via the double-solvent swelling method. When the crystal arrays were immersed in the double-solvent system, the particles were swollen and squeezed into hexagonal particles. The concave of particles can be controlled by tuning the mass ratio of solvent and swelling time. In addition, the particles with novel morphology were also prepared by swollen the arrays with a distinct lattice structure. The monodispersed particles possess a well-defined hexagonal outline and liquid crystal phenomenon, which will have a promising application in the fields of photonics, optical devices, and toners.