کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9818329 | 1518778 | 2005 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Desorption of gold nanoclusters (2-150Â nm) by 1Â GeV Pb ions
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سطوح، پوششها و فیلمها
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چکیده انگلیسی
Nanodispersed targets of gold (grains sized at 2-150Â nm) were irradiated with 956Â MeV ions of Pb54+ ((dE/dx)e in gold 87Â keV/nm). Ejected gold was gathered on collectors. Desorbed nanoclusters of gold were detected by means of TEM while the total matter transfer was measured by neutron activation analysis. For all the targets a part of ejected gold presents nanoclusters in the same size range as that of the grains on the corresponding targets. Desorption of nanoclusters with the size up to 90Â nm was observed for the first time for atomic primary ions in the electronic stopping regime. The yield of the desorbed nanoclusters decreases from 22 to 1.4Â cluster/ion with increasing the mean grain size from 6 to 30Â nm. The total matter transfer measured for the target with the grain size 6-10Â nm has a great value - â¼5Â ÃÂ 105Â at./ion. Results are discussed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms - Volume 230, Issues 1â4, April 2005, Pages 495-501
Journal: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms - Volume 230, Issues 1â4, April 2005, Pages 495-501
نویسندگان
I. Baranov, S. Kirillov, A. Novikov, V. Obnorskii, M. Toulemonde, K. Wien, S. Yarmiychuk, V.A. Borodin, A.E. Volkov,