Controlled synthesis and growth mechanism of alpha nickel molybate microhombohedron

摘要

Novel α-NiMoO_4 microhombohedron have been successfully synthesized via a microemulsion-mediated hydrothermal route at 140 ℃ for 16 h. The obtained samples are characterized by means of X-ray power diffraction, field-emission scanning electron microscopy, transmission electron microscopy and selected-area electron diffraction analysis. It is found that the as-prepared products are single-crystalline α-NiMoO_4 microhombohedra. And the microhombohedron are possibly fabricated by oriented self-assemble of modular nanobuilding-blocks basing on the anisotropic growth habit of α-NiMoO_4 crystals and the selective absorption of surfactant molecules on the faces of the prime crystals.