PDF/月刊誌論文/code:pg_0909_01 マテリアル インテグレーション 2009年9月号
ELECTRONIC CERAMICS 機能元素のナノ材料科学(9,10合併号)

Control of the nonmaterial structure on the modified TiO2 (110) surface
■著者
北海道大学　 触媒化学研究センター　教授 朝倉　清高

■要約
The TiO\un{2} (110) surface is the most widely investigated oxide surface whose chemical and physical properties are well understood. We have successfully prepared the Ni and Cu species with atomically controlled structure using the interaction or modified interaction with TiO\un{2} (110) surface. We have developed the polarization dependent total reflection fluorescence X-ray absorption fine structure (PTRF-XAFS) method and determine the highly dispersed species in a 3 dimensional manner. Atomically dispersed Ni can be prepared at the step site of TiO\un{2} (110) surface and one-dimensional Ni\un{3} cluster grows around the step edge. On the other hand it is difficult to obtain the monoatomically dispersed Cu on the bare TiO\un{2} (110) surface because of the smaller interaction of Cu and the surface oxygen atoms on TiO\un{2} (110) surface. The appropriate modification to reinforce the interaction of Cu with the TiO\un{2} surface can enable us to obtain the highly dispersed Cu species. We will discuss the origin of the interaction with metal and TiO\un{2} (110) surface.