Ordered_Ag4RS.pdf (125.75 kB)
Ordered Ag nanocluster structures by vapor deposition on pre-patterned SiO2
journal contribution
posted on 2015-03-06, 16:08 authored by Satoshi Numazawa, Mukesh Ranjan, Karl-Heinz Heinig, Stefan Facsko, Roger SmithHighly ordered Ag nanocluster structures have been grown on pre-patterned amorphous SiO2
surfaces by oblique angle physical vapor deposition at room temperature. Despite the small
undulation of the rippled surface, the stripe-like Ag nanoclusters are very pronounced,
reproducible and well separated. Computer modeling of the growth has been performed with a
lattice-based kinetic Monte Carlo (KMC) method using a combination of a simplified
inter-atomic potential and experimental transition barriers taken from the literature. An
effective transition event classification method is introduced which allows a boost factor of
several thousand compared to a traditional KMC approach, thus allowing experimental time
scales to be modeled. The simulation predicts a low sticking probability for the arriving atoms,
millisecond order lifetimes for single Ag adatoms and ≈1 nm square surface migration ranges
of Ag adatoms. It is also shown that metal nucleations can trigger even on defect free surfaces.
The simulations give excellent reproduction of the experimentally observed nanocluster growth
patterns.
Funding
We thank the Deutsche Forschungsgemeinschaft Project HE2137/4-1 for financial support.
History
School
- Science
Department
- Mathematical Sciences
Published in
JOURNAL OF PHYSICS-CONDENSED MATTERVolume
23Issue
22Pages
? - ? (5)Citation
NUMAZAWA, S. ... et al, 2011. Ordered Ag nanocluster structures by vapor deposition on pre-patterned SiO2. Journal of Physics: Condensed Matter , 23 (22), 222203.Publisher
© IOP Publishing Ltd.Version
- AM (Accepted Manuscript)
Publisher statement
This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/Publication date
2011Notes
This article was published in Journal of Physics: Condensed Matter [© IOP Publishing Ltd.] The definitive version is available at: http://dx.doi.org/10.1088/0953-8984/23/22/222203.ISSN
0953-8984Publisher version
Language
- en