https://doi.org/10.1140/epjd/e2004-00011-9
Implantation of size-selected silver clusters into graphite
Linearity of implantation depth vs. scaled momentum
Institut de Physique des Nanostructures, École
Polytechnique Fédérale de Lausanne (EPFL), 1015
Lausanne, Switzerland
Corresponding author: a lucia.seminara@epfl.ch
Received:
21
August
2003
Revised:
24
November
2003
Published online:
10
February
2004
We report on a systematic study of the implantation of
size-selected Ag clusters on a graphite sample, for
different cluster sizes (N=1,3,7,9,13) and different impact
energies (
keV). Results show that the implantation
depth scales linearly with the momentum of the cluster,
with a stopping power which depends on cluster size. We
have particularly investigated the effects of the size and
the geometry of the cluster on the implantation into the
graphite substrate. A sort of universal behavior, which
unifies different elements and different cluster geometries, can
be recognized by scaling the momentum with the cluster projected
surface. The stopping power of the cluster while
penetrating the HOPG surface has been investigated for each
cluster size, and a “molecular effect" is recognized, meaning that
the stopping power is not additive in the number of atoms of the
cluster.
PACS: 61.46.+w – Nanoscale materials: clusters, nanoparticles, nanotubes, and nanocrystals / 68.55.Ln – Defects and impurities: doping, implantation, distribution, concentration, etc. / 79.20.Rf – Atomic, molecular, and ion beam impact and interactions with surfaces / 81.05.Uw – Carbon, diamond, graphite
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2004