Campus Units

Chemistry, Electrical and Computer Engineering, Materials Science and Engineering, Mathematics, Physics and Astronomy, Ames Laboratory, Office of Biotechnology

Document Type

Article

Publication Version

Published Version

Publication Date

5-20-2020

Journal or Book Title

New Journal of Physics

Volume

22

First Page

053033

DOI

10.1088/1367-2630/ab84b5

Abstract

We use a variety of experimental techniques to characterize Cu clusters on bulk MoS2 formed via physical vapor deposition of Cu in ultrahigh vacuum, at temperatures ranging from 300 K to 900 K. We find that large facetted clusters grow at elevated temperatures, using high Cu exposures. The cluster size distribution is bimodal, and under some conditions, large clusters are surrounded by a denuded zone. We propose that defect-mediated nucleation, and coarsening during deposition, are both operative in this system. At 780 K, a surprising type of facetted cluster emerges, and at 900 K this type predominates: pyramidal clusters with a triangular base, exposing (311) planes as side facets. This is a growth shape, rather than an equilibrium shape.

Comments

This article is published as Jing, Dapeng, Ann Lii-Rosales, King C. Lai, Qiang Li, Jaeyoun Kim, Michael C. Tringides, James W. Evans, and Patricia A. Thiel. "Non-equilibrium growth of metal clusters on a layered material: Cu on MoS2." 22 New Journal of Physics (2020): 053033. DOI: 10.1088/1367-2630/ab84b5. Posted with permission.

Creative Commons License

Creative Commons Attribution 4.0 License
This work is licensed under a Creative Commons Attribution 4.0 License.

Copyright Owner

The Author(s)

Language

en

File Format

application/pdf

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