| Abstract
| - Mesoporous silica was synthesized in the presence of metal (Au, Pt, and Ag) nanoparticles in the 2−20nm range. Sample characterization was performed by X-ray diffraction and electron microscopy. The metalnanoparticles in the 2−10 nm range were successfully incorporated into the ordered mesoporous SBA-15structures; 20 nm particles, whose diameter is larger than the SBA-15 pore size, could not be inserted.In the case of 5 and 10 nm diameter nanoparticles, regardless of which metal, the mesopore channelsexpanded in order to accommodate the metal particles. By using mixtures of metal nanoparticles of twodifferent sizes, it was found that the inclusion and the resultant pore size were controlled by the largersize metal particles.
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