INVESTIGADORES
BRINGA Eduardo Marcial
artículos
Título:
Sputtering from a Porous Material by Penetrating Ions
Autor/es:
J.F. RODRIGUEZ NIEVA; E.M. BRINGA
Revista:
The Astrophysical Journal Letters
Editorial:
IOP PUBLISHING LTD.
Referencias:
Año: 2011 vol. 743 p. 1 - 5
ISSN:
2041-8205
Resumen:
Porous materials are ubiquitous in the universe and weathering of porous
surfaces plays an important role in the evolution of planetary and
interstellar materials. Sputtering of porous solids in particular can
influence atmosphere formation, surface reflectivity, and the production
of the ambient gas around materials in space. Several previous
studies and models have shown a large reduction in the sputtering of a
porous solid compared to the sputtering of the non-porous solid.
Using molecular dynamics simulations we study the sputtering of a
nanoporous solid with 55% of the solid density. We calculate the
electronic sputtering induced by a fast, penetrating ion, using a
thermal spike representation of the deposited energy. We find that
sputtering for this porous solid is, surprisingly, the same as that
for a full-density solid, even though the sticking coefficient is
high.