Abstract

Uniform titania and silica hollow microspheres of 300–500nm diameter with controlled wall thickness have been successfully synthesized using monodispersed micro-ice as the template generated by freezing water droplets in a reverse microemulsion at −40°C and −80°C and subsequent sol–gel reactions on the surface of the formed micro-ice. Furthermore, the growth mechanism of the hollow spheres by this facile and interesting technique was discussed in detail.

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