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Ordered Ag nanocluster structures by vapor deposition on pre-patterned SiO2

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posted on 06.03.2015, 16:08 by Satoshi Numazawa, Mukesh Ranjan, Karl-Heinz Heinig, Stefan Facsko, Roger SmithRoger Smith
Highly 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 MATTER

Volume

23

Issue

22

Pages

? - ? (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

2011

Notes

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

0953-8984

Language

en

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