Optical properties of self-assembled silica particles

Y. Tatara, H. Sato, H. Nishikawa

Research output: Contribution to conferencePaper

Abstract

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.

Original languageEnglish
Pages41-44
Number of pages4
Publication statusPublished - 2003 Oct 20
EventProceedings of the 7th International Conference on Properties and Applications of Dielectric Materials - Nagoya, Japan
Duration: 2003 Jun 12003 Jun 5

Conference

ConferenceProceedings of the 7th International Conference on Properties and Applications of Dielectric Materials
CountryJapan
CityNagoya
Period03/6/103/6/5

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ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Materials Chemistry

Cite this

Tatara, Y., Sato, H., & Nishikawa, H. (2003). Optical properties of self-assembled silica particles. 41-44. Paper presented at Proceedings of the 7th International Conference on Properties and Applications of Dielectric Materials, Nagoya, Japan.