Hollow titania particles

Fig. 28 TEM images of (a) the polystyrene latex spheres used as the core and (b) the same particles coated with a thin 25 nm titania shell, (c) SEM image of hollow titania spheres obtained by calcination of the polystyrene/Ti02 core-shell particles at 600°C under ain (d) Eidaiged TEM view of some hollow titania particles showing the small anatase crystallites that compose the sheU. Reproduced from [231] with permission of the American Chemical Society...

Caruso, F., Shi, X., Caruso, R.A., and Susha, A. (2001) Hollow titania spheres from layered precursor deposition on sacrificial colloidal core particles. Adv. Mater, 13, 740-744. 

Katagiri, K., Kamiya, J., Koumoto, K., and Inumaru, K. (2012) Preparation of hollow titania and strontium titanate spheres using sol-gel derived silica gel particles as templates./. Sol-GelSci. Technol, 63, 366-372. 

H. Imai et al. have reported that the monodisperse hollow nanotubes consisting of anatase crystalline of Ti02 particles have been directly prepared in a porous alumina membrane by a deposition technique using an aqueous solution system of titania tetrafluoride. The morphology of the anatase nanotubes was highly controllable because no annealing for crystallization was required. The photocatalytic activity of the deposited anatase was... 

Efficient intracellular delivery of the anticancer drug camptothecin (CPT) by hollow silica/titania nanoparticles has been reported [114]. Monodispersed hollow nanoparticles (about 50 nm) were prepared by titania coating of Stober silica particles followed by silica dissolution and redeposition in an ammonia solution (Figure 11.13). Surface modification of these particles with an antibody herceptm, a... 

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