Sputtering of nano-grains by energetic ions

Details Sputtering of nano-grains by energetic ions Sputtering of nano-grains by energetic ions

Jun 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002nimpb.193..365b&link_type=abstract

Nuclear Instruments and Methods in Physics Research Section B, Volume 193, Issue 1-4, p. 365-370.

Physics

10

Scientific paper

Sputtering from grains with a size of tens of nanometers is important in a number of astrophysical environments having a variety of plasma properties and can have applications in nano-technology. Since energy deposition by incident ions or electrons can create `hot' regions in a small grain, thermal spike (TS) models have been applied to estimate the sputtering. The excitations produced by a fast ion are often assumed to form a `hot' cylindrical track. In this paper we use molecular dynamics (MD) calculations to describe the energy transport and sputtering due to the creation of a `hot' track in a grain with one quarter million atoms. We show the enhancement due to grain size and find that TS models work over a limited range of excitation densities. Discrepancies of several orders of magnitude are found when comparing our MD results for sputtering of small dust grains to those obtained by the astrophysical community using spike models.

Affiliated with

Also associated with

No associations

Rating

Sputtering of nano-grains by energetic ions does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Sputtering of nano-grains by energetic ions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Sputtering of nano-grains by energetic ions will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1199552