Complex inorganic/organic core-shell architectures via an inverse emulsion process |
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Authors: | Kathy Schmidtke Günter Lieser Markus Klapper Klaus Müllen |
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Institution: | (1) Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany; |
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Abstract: | The preparation of complex inorganic/organic core-shell particles and their in situ hydrophobization via an inverse emulsion
technique is described here. Typically, aqueous solutions of precursor salts are dispersed with the help of statistical copolymers
in an organic phase and subsequently polymer-stabilized nanoparticles precipitate at room temperature (e.g., barium- or strontium-based
perovskite nanoparticles). By this technique, core-multiple-shell ZnO–silica–polymer nanoparticles may also be obtained, whereby
the polymer matrix is protected against the photocatalytically active ZnO by the silica shell. The particles are characterized
by X-ray, transmission electron microscopy, and dynamic light scattering. In this approach, amphiphilic statistical copolymers
act not only as stabilizers for inverse emulsions, but they also hydrophobize the remaining complex inorganic particles shelled
on the surface after the precipitation. The preparation of hybrid nanoparticles is performed by a one-pot procedure, which
makes this process attractive for industrial applications. |
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