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Ejection of Nanoclusters from Gold Nanoislet Layers by 38 keV Au Ions in the Elastic Stopping Mode

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Abstract:

Total absolute yields of the ejected gold were obtained regardless of the type of the particles are—atoms, clusters, nanoclusters,—as well as absolute yields of gold nanoclusters, from nanoislet gold targets under bombardment by monoatomic gold ions at 45° to the target surface with the energy 38 keV, i.e., in the "purely" elastic stopping mode −6 keV/nm up to the fluence of 4*1012 cm2. Three targets had gold nanoislets on the substrate surface: 2–12 nm; −18 nm; −35 nm, the most probable sizes being 7.1; 9.4; 17.5 nm respectively. The part of the surface area covered with gold was known. Total transfer of gold was determined by means of the neutron-activation analysis and decreased from 450 to 20 at/ion. The number of the ejected gold nanoclusters was determined using TEM and decreased from ∼0.06 to <0.01 per one 38 keV Au ion with the increase of the most probable sizes of the nanoislets on the target from 7.1 to 17.5 nm. The yields appeared to be surprisingly high, which is of scientific and practical importance. Tentative estimations were made using molecular dynamics simulations.

Keywords: ELASTIC STOPPING MODE; ION BOMBARDMENT; NANOCLUSTERS; NANODISPERSED TARGETS

Document Type: Research Article

DOI: https://doi.org/10.1166/jnn.2009.M14

Publication date: 2009-07-01

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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