Fabrication of hollow titania microspheres with tailored shell thickness |
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Authors: | Mukesh Agrawal Andrij Pich Nikolaos E Zafeiropoulos Manfred Stamm |
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Institution: | 1. Leibniz-Institut für Polymerforschung Dresden e.V., Hohe Strasse 6, 01069, Dresden, Germany 2. Institut für Makromolekulare Chemie und Textilchemie, Technische Universit?t Dresden, Mommsenstr. 4, 01062, Dresden, Germany
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Abstract: | Submicron hollow spheres are an interesting class of materials that receive significant attention nowadays. Closed and mechanically
robust homogeneous hollow titania microspheres with as much shell thickness as 130 nm were fabricated by coating polystyrene
beads with titania nanoparticles using sol–gel chemistry and subsequently removing the core either via heating or a chemical
dissolution process. The thickness of the titania shell deposited on polystyrene core was finely tuned between 100 and 130 nm
by varying the concentration of titania precursor, i.e., Ti(OEt)4 salt from 0.5 to 2 mM during the coating process. The obtained hybrid core–shell particles and hollow microspheres were characterized
by scanning electron microscopy, transmission electron microscopy, infrared spectroscopy, X-ray diffraction, and thermo-gravimetric
analysis. The approach employed is well suited to the preparation of titania-coated polystyrene hybrid particles and hollow
titania spheres, which can find their applications as novel building blocks with unique optical properties for fabrication
of advanced materials, catalyst, and drug delivery system. |
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Keywords: | Titania nanoparticles Polystyrene beads Hybrid particles Hollow spheres |
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