title: Microemulsion-mediated solvothermal synthesis and morphological evolution of MnCO3 nanocrystals.
abstract: The morphology- and size-controlled synthesis of MnCO3 nanocrystals was successfully achieved by cationic surfactant-CTAB-microemulsion-mediated solvothermal method. Various comparison experiments with different reactant concentrations and molar ratios between water and CTAB, showed the evolvement law of the morphology and size of the as-synthesized MnCO3 nanocrystals. With slowly increasing the concentration of reactants and/or molar ratio between water and CTAB, the morphology of MnCO3 nanocrystals changed gradually from cube to parallelepiped, and then rhombohedron, whereas the size decreased a little. The effect of the experimental parameters on the shapes and sizes of samples, such as the source of carbonate salts, reaction time, and temperature, were also discussed. X-ray powder diffraction (XRD), transmission electron microscopy (TEM), selected area electron diffraction (SAED), and high-resolution transmission electron microscopy (HRTEM) were used to characterize the products.
authors.affiliation: Department of Chemistry, Northeast Normal University, Changchun, People's Republic of China.
authors.forename: Xinglong
authors.initials: X
authors.lastname: Wu
authors.forename: Minhua
authors.initials: M
authors.lastname: Caol
authors.forename: Hongyan
authors.initials: H
authors.lastname: Lü
authors.forename: Xiaoyan
authors.initials: X
authors.lastname: He
authors.forename: Changwen
authors.initials: C
authors.lastname: Hu
mesh_terms: D002254:Carbonates / Q000737:chemistry*; D003460:Crystallization / Q000379:methods*; D004655:Emulsions / Q000737:chemistry*; D006358:Hot Temperature; D046911:Macromolecular Substances / Q000737:chemistry; D008345:Manganese / Q000737:chemistry*; D008422:Materials Testing; D008968:Molecular Conformation; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D036103:Nanotechnology / Q000379:methods*; D010316:Particle Size; D012997:Solvents / Q000737:chemistry*; D013499:Surface Properties
chemical_list: D002254:Carbonates; D004655:Emulsions; D046911:Macromolecular Substances; D012997:Solvents; D008345:Manganese; C045327:manganese carbonate