Size and Shape Transformation of TiO_2 Nanoparticles by Irradiation of 308-nm Laser Beam
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概要
- 論文の詳細を見る
TiO_2 particles in a colloidal solution changed their size and shape upon irradiation of a 308 nm laser beam which corresponded to the inter-band absorption of the particles. The particles with a diameter size distribution between 170 to 1050 nm were transformed to smaller particles of approximately 10 nm diameter with a narrow size distribution. The particles of 2 nm diameter were also converted to the particles of 10 nm diameter. The irradiated particles were spherical, indicating that particles were melted upon laser irradiation. The threshold of laser fluence was observed for the size and shape transformation of the particles, which was several times larger than the energy required to melt the particles. Agglomeration of the particles, which was controlled by pH of the solution, enlarged the average size and broadened the range of size distribution of the irradiated particles. The mechanism determining the size of the irradiated particles has been discussed.
- 社団法人応用物理学会の論文
- 2002-07-15
著者
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Koda Seiichiro
Department Of Chemical System Engineering School Of Engineering University Of Tokyo
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Okazaki Hitoshi
Department Of Chemical System Engineering School Of Engineering University Of Tokyo
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Sugiyama Masakazu
Department Of Chemical System Engineering School Of Engineering University Of Tokyo
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Sugiyama Masakazu
Department Of Biotechnology Graduate School Of Agriculture And Life Sciences The University Of Tokyo
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Koda Seiichiro
Department Of Chemical Engineering Facutly Of Engineering The University Of Tokyo
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