Fabrication and photoluminescence of rutile-TiO2 nanorods

Lei Miao, Sakae Tanemura, Shoichi Toh, Kenji Kaneko, Masaki Tanemura

研究成果: Article査読

8 被引用数 (Scopus)

抄録

Densely assembled single-phase rutile-TiO2 nanorods with diameters of 150-200 nm and lengths of 2-7 μm have been successfully synthesized for the first time by a heating-sol-gel template method. It was found that the heating process of TiO2 sol was beneficial to the single-phase formation of rutile-TiO2 nanorods. Transmission electron microscopic observations reveal that these rutile-TiO2 nanorods are the aggregates of nanocrystallites grown preferentially to the [110] axis with diameters of 10-30 nm. Selected area electron diffraction and energy dispersive X-ray spectroscopy measurements confirm that the obtained nanorods are rutile-TiO2 nanorods with good compositional uniformity and a relatively distinct crystallite shape over the entire length. The photoluminescence result shows a broad band confined in the wavelength range of 400-600 nm. This broad band is thought to originate from bound excitations emission due to the trapping of free excitons by TiO6 octahedra near defects which are possibly oxygen vacancies and/or the color center of Al 3+ impurities.

本文言語English
ページ(範囲)7342-7345
ページ数4
ジャーナルJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
43
10
DOI
出版ステータスPublished - 2004 10
外部発表はい

ASJC Scopus subject areas

  • 工学(全般)
  • 物理学および天文学(全般)

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