Nanoparticle Formation of Pentacene by Laser Irradiation in Ethanol Solution
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概要
- 論文の詳細を見る
Laser irradiation using a Nd3+:YAG laser (532 nm, 8 ns, 10 Hz) on an ethanol suspension of micrometer-sized pentacene crystals induced absorption spectral changes in the solution, as a result of the formation of pentacene nanoparticles. The nanoparticles were platelike crystals. The nanoparticles formed by irradiation with a fluence of 50 mJ/cm2 for 30 min were 4–13 nm in height and 10–70 nm in width. The threshold laser fluence for the formation was determined to be ca. 20 mJ/cm2, and irradiation with fluences above 80 mJ/cm2 induced the decomposition of the pentacene nanoparticles. The nanoparticle size decreased with an increase in the laser fluence, which was reflected in the longest-wavelength peak position of the absorption bands of the pentacene nanoparticles. On the basis of these results, the mechanism of pentacene nanoparticle formation by laser irradiation is discussed in connection with those of vanadyl phthalocyanine and quinacridone systems reported by Masuhara and coworkers [J. Phys. Chem. A 106 (2002) 2135; Jpn. J. Appl. Phys. 42 (2003) 2725; Jpn. J. Appl. Phys. 45 (2006) 384].
- Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
- 2006-08-15
著者
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Itaya Akira
Department Of Macromolecular Science And Engineering Kyoto Institute Of Technology
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Machida Shinjiro
Department Of Chemistry And Biotechnology Graduate School Of Engineering The University Of Tokyo
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Masuo Sadahiro
Department Of Macromolecular Science And Engineering Kyoto Institute Of Technology
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Kita Shinji
Department of Polymer Science and Engineering, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
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Machida Shinjiro
Department of Polymer Science and Engineering, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
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Masuo Sadahiro
Department of Polymer Science and Engineering, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
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Itaya Akira
Department of Chemical Engineering, Faculty of Engineering, Yamaguchi University
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