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A Core–Corona Hierarchical Manganese Oxide and its Formation by an Aqueous Soft Chemistry Mechanism


  • The authors acknowledge Sophia Khan for experimental support, Dr. Patricia Beaunier (University of Paris 6) for TEM measurements, Annie Richard and Dominique Jalabert (University of Orléans) for FESEM and HRTEM measurements, and Anny Anglo (University of Paris 6) for performing the ultrathin sections.


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No template and no organic medium are needed for the low-temperature, one-pot aqueous route to layered manganese oxides with a hierarchical core–corona architecture (see picture). Particle formation occurs by a two-step precipitation process with two different kinetics.