We investigated optical properties of mono-dispersed silica with diameters of several hundred nanometers. The mono-dispersed silica particles were formed by the Stober method from tetraethoxysilane (TEOS). Structures and impurities of the silica particles were studied by Fourier Transform Infrared (FT-IR) absorption. Impurities such as hydroxyls were removed by an anneal at temperatures more than 500 C. In addition, the peak position around 1100 cm-1 due to the Si-O bonds was changed to higher frequencies during the anneal. This suggests the structures such as Si-O-Si bond angles of mono-dispersed silica were modified during annealing. These silica particles were easily self-assembled on silicon substrates or glass. The states of the self-assembled structures were observed by an optical microscope, an atomic force microscope, and a scanning electron microscope. Two dimensional or three dimensional close-packed structures with were observed.
|出版ステータス||Published - 2003 10 20|
|イベント||Proceedings of the 7th International Conference on Properties and Applications of Dielectric Materials - Nagoya, Japan|
継続期間: 2003 6 1 → 2003 6 5
|Conference||Proceedings of the 7th International Conference on Properties and Applications of Dielectric Materials|
|Period||03/6/1 → 03/6/5|
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