Desorption of gold nanoclusters from gold nanodispersed targets by 200keV Au5 polyatomic ions in the elastic stopping mode: Experiment and molecular-dynamics simulation
| Autor: | S. Yarmiychuk, Gerolf Ziegenhain, V. Obnorsky, K. Wien, Christian Anders, M. Fallavier, Alexey Novikov, Serge Della-Negra, I. Baranov, Herbert M. Urbassek, V. Domaratsky |
|---|---|
| Přispěvatelé: | Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3) |
| Rok vydání: | 2009 |
| Předmět: |
79.20.Rf
61.82.Rx 36.40.c Nuclear and High Energy Physics Materials science Astrophysics::High Energy Astrophysical Phenomena Analytical chemistry 02 engineering and technology 7. Clean energy 01 natural sciences Thermal expansion Nanoclusters Ion Cluster projectiles Molecular dynamics Desorption 0103 physical sciences Atom Physics::Atomic and Molecular Clusters 010306 general physics Nanoislet metal target Instrumentation [PHYS.PHYS.PHYS-ATM-PH]Physics [physics]/Physics [physics]/Atomic and Molecular Clusters [physics.atm-clus] Polyatomic ion 021001 nanoscience & nanotechnology Yield (chemistry) Nanocluster ejection Atomic physics 0210 nano-technology |
| Zdroj: | Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Elsevier, 2009, 267, pp.2503-2514. ⟨10.1016/j.nimb.2009.05.010⟩ |
| ISSN: | 0168-583X |
| DOI: | 10.1016/j.nimb.2009.05.010 |
| Popis: | Au nanoislet targets (∅ 2–60 nm) were bombarded by 200 keV polyatomic ions (40 keV/atom), which deposit their energy mainly in the nuclear stopping mode: ∑(dE/dx)n = 30 keV/nm and ∑(dE/dx)e = 2 keV/nm. The matter desorbed in the form of nanoclusters was registered by TEM. The total transfer of matter was determined by neutron-activation analysis. The total yield of the ejected gold reached high values of up to 2.6 × 104 atoms per Au5 ion. The major part (2 × 104 atoms per ion Au5) of the emission is in the form of nanoclusters. The results are compared with the data of similar experiments with 1 MeV Au5 (200 keV/atom) and other projectiles. The analysis of the experimental data and the comparison to molecular-dynamics simulation results of the desorption process show that the desorption of Au nanoislets is induced by their melting, build-up of pressure and thermal expansion. |
| Databáze: | OpenAIRE |
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