COLL 170 |
| Yu-chin Hung1, Sue-min Chang1, and Ruey-an Doong2. (1) Department Atomic Science, National Tsing Hua University, 101, Sec. 2, Kuang Fu Road, Hsinchu, 30055, Taiwan, (2) Department of Atomic Science, National Tsing Hua University, 101, Sec2, Kuang Fu Road, Hsinchu, 30013, Taiwan |
| Titanium dioxide (TiO2) is a well-known material with interesting properties and potential applications in photocatalysts and biomaterials. The use of templates for the fabrication of highly porous film structures is the most often used technique. In this study, a simple template method which can simultaneously complete the self-assembly of template and infiltration between the template of voids with sol of TiO2 was developed. Monodispersed polystyrene colloids were mixed with sol of ultrafine TiO2 particles, followed by vertical immersion of the substrate into the mixed solution. The TiO2 film was formed by using capillary force. The thermogravimetric analysis showed that the template was removed when the temperature increased to 250 oC and TiO2 microspheres structure transformed from amorphous to crystalline structures at 450 oC. The XRD patterns confirm that the TiO2 is anatase phase at peak of 25. The SEM images show that these films have an ordered structure with film thickness of 600-1000 nm and the hexagonal orientation indicates the (111) plane of the fcc lattice. |
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Nanoscience and Nanotechnology
2:00 PM-5:15 PM, Monday, March 29, 2004 Marriott -- Grand Ballroom J, Oral
Division of Colloid and Surface Chemistry |