Irradiation Temperature Dependence of Shape Elongation of Metal Nanoparticles in Silica: Counterevidence to Ion Hammering Related Scenario
Irradiation temperature (IT) dependence of the elongation efficiency of vanadium nanoparticles (NPs) in SiO<sub>2</sub> was evaluated: The samples were irradiated with 120 MeV Ag<sup>9+</sup> ions to a fluence of 1.0 × 10<sup>14</sup> ions/cm<sup>2</sup&g...
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MDPI AG
2023-04-01
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| Series: | Quantum Beam Science |
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| Online Access: | https://www.mdpi.com/2412-382X/7/2/12 |
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| author | Hiroshi Amekura Saif Ahmad Khan Pawan Kumar Kulriya Debdulal Kabiraj |
| author_facet | Hiroshi Amekura Saif Ahmad Khan Pawan Kumar Kulriya Debdulal Kabiraj |
| author_sort | Hiroshi Amekura |
| collection | DOAJ |
| description | Irradiation temperature (IT) dependence of the elongation efficiency of vanadium nanoparticles (NPs) in SiO<sub>2</sub> was evaluated: The samples were irradiated with 120 MeV Ag<sup>9+</sup> ions to a fluence of 1.0 × 10<sup>14</sup> ions/cm<sup>2</sup> each at ITs of 300, 433, 515, and 591 K, while the measurements were performed at room temperature. The vanadium was selected for the NP species because of the highest bulk m.p. of 1910 °C (2183 K) among all the species of the elemental metal NPs in which the shape elongation was observed. The highest m.p. could contribute negligible size changes of NPs against inevitable exposure to high temperatures for the IT dependence measurements. The elongation of V NPs was evaluated qualitatively by transmission electron microscopy (TEM) and quantitatively by optical linear dichroism (OLD) spectroscopy. The electron microscopy studies showed a pronounced elongation of NPs with ion irradiation at the elevated temperatures. The OLD signal was almost constant, or even slightly increased with increasing the IT from 300 to 591 K. This IT dependence provides a striking contrast to that of the ion hammering (IH) effect, which predicts a steep decrease with increasing IT. Combined with the other two counterevidence previously reported, the IH-related effect is excluded from the origin of the shape elongation of metal NPs in SiO<sub>2</sub>. |
| first_indexed | 2024-03-11T02:00:17Z |
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| issn | 2412-382X |
| language | English |
| last_indexed | 2024-03-11T02:00:17Z |
| publishDate | 2023-04-01 |
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| series | Quantum Beam Science |
| spelling | doaj.art-befb26df57a24c909e331925797bf0c92023-11-18T12:22:00ZengMDPI AGQuantum Beam Science2412-382X2023-04-01721210.3390/qubs7020012Irradiation Temperature Dependence of Shape Elongation of Metal Nanoparticles in Silica: Counterevidence to Ion Hammering Related ScenarioHiroshi Amekura0Saif Ahmad Khan1Pawan Kumar Kulriya2Debdulal Kabiraj3National Institute for Materials Science (NIMS), Tsukuba 305-0003, Ibaraki, JapanInter-University Accelerator Centre (IUAC), Aruna Asaf Ali Marg, New Delhi 110067, IndiaInter-University Accelerator Centre (IUAC), Aruna Asaf Ali Marg, New Delhi 110067, IndiaInter-University Accelerator Centre (IUAC), Aruna Asaf Ali Marg, New Delhi 110067, IndiaIrradiation temperature (IT) dependence of the elongation efficiency of vanadium nanoparticles (NPs) in SiO<sub>2</sub> was evaluated: The samples were irradiated with 120 MeV Ag<sup>9+</sup> ions to a fluence of 1.0 × 10<sup>14</sup> ions/cm<sup>2</sup> each at ITs of 300, 433, 515, and 591 K, while the measurements were performed at room temperature. The vanadium was selected for the NP species because of the highest bulk m.p. of 1910 °C (2183 K) among all the species of the elemental metal NPs in which the shape elongation was observed. The highest m.p. could contribute negligible size changes of NPs against inevitable exposure to high temperatures for the IT dependence measurements. The elongation of V NPs was evaluated qualitatively by transmission electron microscopy (TEM) and quantitatively by optical linear dichroism (OLD) spectroscopy. The electron microscopy studies showed a pronounced elongation of NPs with ion irradiation at the elevated temperatures. The OLD signal was almost constant, or even slightly increased with increasing the IT from 300 to 591 K. This IT dependence provides a striking contrast to that of the ion hammering (IH) effect, which predicts a steep decrease with increasing IT. Combined with the other two counterevidence previously reported, the IH-related effect is excluded from the origin of the shape elongation of metal NPs in SiO<sub>2</sub>.https://www.mdpi.com/2412-382X/7/2/12shape elongationmetal nanoparticleswift heavy ionirradiation temperature dependenceion shapingoptical linear dichroism spectroscopy |
| spellingShingle | Hiroshi Amekura Saif Ahmad Khan Pawan Kumar Kulriya Debdulal Kabiraj Irradiation Temperature Dependence of Shape Elongation of Metal Nanoparticles in Silica: Counterevidence to Ion Hammering Related Scenario Quantum Beam Science shape elongation metal nanoparticle swift heavy ion irradiation temperature dependence ion shaping optical linear dichroism spectroscopy |
| title | Irradiation Temperature Dependence of Shape Elongation of Metal Nanoparticles in Silica: Counterevidence to Ion Hammering Related Scenario |
| title_full | Irradiation Temperature Dependence of Shape Elongation of Metal Nanoparticles in Silica: Counterevidence to Ion Hammering Related Scenario |
| title_fullStr | Irradiation Temperature Dependence of Shape Elongation of Metal Nanoparticles in Silica: Counterevidence to Ion Hammering Related Scenario |
| title_full_unstemmed | Irradiation Temperature Dependence of Shape Elongation of Metal Nanoparticles in Silica: Counterevidence to Ion Hammering Related Scenario |
| title_short | Irradiation Temperature Dependence of Shape Elongation of Metal Nanoparticles in Silica: Counterevidence to Ion Hammering Related Scenario |
| title_sort | irradiation temperature dependence of shape elongation of metal nanoparticles in silica counterevidence to ion hammering related scenario |
| topic | shape elongation metal nanoparticle swift heavy ion irradiation temperature dependence ion shaping optical linear dichroism spectroscopy |
| url | https://www.mdpi.com/2412-382X/7/2/12 |
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