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The crystal-form-controllable nanosize TiO2 was obtained using homogeneous hydrolysis method by the addition of toluene-p-sulfonic acid (TSA). Two processes of the rutile phase formation were proposed. The sample with 0.2 mole ratio of toluene-p-sulfonic acid was a mixed crystal of anatase and rutile, and characterised that the size of nano-crystalline was 19.5 nm for rutile, and 13.5 nm for anatase, the specific surface area was 72.7 m2/g, and the energy of band gap was 2.83 eV. The mechanism of development of rutile nanosize TiO2 was presented in homogeneous hydrolysis system with TSA.

The excess Sb effect for the dynamics of rapid crystallization in eutectic amorphous films are discussed. This crystallization mechanism describe the propagation with high velocity in the interface separating the crystalline and amorphous phase for InSb and AgInSbTe materials. From these analysis, it is clear that the crystallization is grown up in the boundary of crystalline-amorphous region of eutectic materials, which is different from the stoichiometric GeSbTe media. Also, the quantum effect on the melting, crystallization and solidification of phase change media has been discussed.

The homogeneous hydrolysis method was proposed to synthesize nano-TiO 2 with mixed crystal of anatase and rutile. It is remarkable that the crystal-form-controllable nanosize TiO 2 was obtained by the addition of toluene-p-sulfonic acid (TSA). Two processes of the rutile phase formation were proposed. TiO 2 was pure anatase crystalline in the absence of TSA. The sample with 0.2 mole ratio of TSA was mixed crystal of anatase and rutile, and characterized that the size of nanocrystalline was 19.5 nm for rutile and 13.5 nm for anatase, the specific surface area was 72.7 m 2 /g, and the energy of band gap was 2.83 eV. And the mechanism of the development of rutile nano-TiO 2 was presented in homogeneous hydrolysis system with TSA. J ournal

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