Shock-wave synthesis of nanoparticles during ion sputtering

L. E. Rehn, R. C. Birtcher, S. E. Donnelly, P. M. Baldo, L. Funk

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


We report electron microscopy studies of nanoparticles (500 ≤ n ≤ 104, where n is the number of atoms in a given cluster) that are sputtered from the surface by high-energy ion impacts. Measurements of the sizes of these clusters yielded an inverse power-law distribution with an exponent of -2 that is independent of irradiating ion species and total sputtering yield. This inverse-square dependence indicates that these nanoclusters are produced when shock waves, generated by sub-surface displacement cascades, impact and ablate the surface. Such nanoparticles consist of simple fragments of the original surface, i.e., ones that have not undergone any large thermal excursion. As discussed below, this "ion ablation" technique should therefore be useful for synthesizing nanoparticles of a wide variety of alloy compositions and phases.

Original languageEnglish
Pages (from-to)181-186
Number of pages6
JournalMaterials Research Society Symposium - Proceedings
Publication statusPublished - 1 Jan 2001
Externally publishedYes


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