[Zurück]

R. Ritter:
"Nanopores in 1 nm thick carbon-nanomembranes drilled by slow highly charged ions";
Vortrag: 25th International Conference on Atomic Collisions in Solids (ICACS-25), Kyoto University, Kyoto/Japan,; 24.10.2012; in: "Book of Abstracts, ICACS-25", (2012), S. 45.

Nanostructures produced by slow highly charged ion (HCI) impact on surfaces have been a hot topic
recently (see [1 - 4] and refs. therein). In this contribution we present first investigations on the effect
of individual slow HCI bombardment of freestanding carbon nano-membranes (CNMs). The CNMs
are produced by cross-linking of an aromatic self-assembled monolayer of biphenyl units with lowenergy
electrons [5]. The substrate is then subsequently removed and the resulting nanosheet (1 nm
thickness) transferred onto a holey carbon TEM grid. CNMs produced in such a way are irradiated
by slow Xeq+ ions of various charge states (20 ! q ! 40) and kinetic energies (4 keV ! E ! 180 keV).
After irradiation the CNMs are inspected by high resolution imaging techniques, e.g. TEM, SEM and
AFM. On the irradiated CNMs we find nanoscopic pores (3 - 30 nm in diameter, see fig. 1), whose
number density corresponds well with the incident ion fluence, indicating that about every HCI produces
a nano-hole in the CNM.