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| HAL : hal-00204949, version 1 |
| Fiche détaillée |  Récupérer au format |
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| The Seventh International Symposium on Swift Heavy Ions in Matter, Lyon : France (2008) |
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| Mechanism of Elongation of Gold or Silver Nanoparticles in Silica by Irradiation with Swift Heavy Ions |
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| K. Awazu 1X. Wang 1 |
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| (06/2008) |
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| It has been reported that elongated Au nanoparticles oriented parallel to one another can be synthesized in SiO2 by ion irradiation. Our aim was to elucidate the mechanism of this elongation. We prepared Au and Ag nanoparticles with a diameter of 20 nm in an SiO2 matrix. It was found that Au nanoparticles showed greater elongated with a higher flux of ion beam and with thicker SiO2 films. In contrast, Ag nanoparticles split into two or more shorter nanorods aligned end to end in the direction parallel to the ion beam. These experimental results are discussed in the framework of a thermal spike model of Au and Ag nanorods embedded in SiO2. The lattice temperature exceeds the melting temperatures of SiO2, Au and Ag for 100 ns after one 110-MeV Br10+ ion has passed through the middle of an Au or Ag nanorod. |
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| 1 : | CAN-FOR |
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National Institute of Advanced Science and Technology |
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| 2 : | Waseda University Shinjuku |
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Waseda University Shinjuku |
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| 3 : | Tandem Accelerator Complex |
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University of Tsukuba |
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| Domaine | : | Physique/Physique des Hautes Energies - Expérience |
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| swift heavy ion – nanofabrication – Au nanoparticles – silica glass |
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| Liste des fichiers attachés à ce document : | ||||||||||
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| hal-00204949, version 1 | |
| http://hal.archives-ouvertes.fr/hal-00204949 | |
| oai:hal.archives-ouvertes.fr:hal-00204949 | |
| Contributeur : Koichi AWAZU | |
| Soumis le : Mardi 22 Juillet 2008, 02:37:25 | |
| Dernière modification le : Jeudi 11 Décembre 2008, 22:27:31 | |
