Cu2S3 complex on Cu(111) as a candidate for mass transport enhancement

Date
2015-01-01
Authors
Walen, Holly
Liu, Da-Jiang
Oh, Junepyo
Lim, Hyunseob
Evans, James
Aikens, Christine
Kim, Yousoo
Thiel, Patricia
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Ames Laboratory
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Physics and Astronomy
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Chemistry
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Abstract

Sulfur-metal complexes, containing only a few atoms, can open new, highly efficient pathways for transport of metal atoms on surfaces. For example, they can accelerate changes in the shape and size of morphological features, such as two-dimensional nanoclusters, over time. In this study we perform STM under conditions that are designed to specifically isolate such complexes. We find a new, unexpected S-Cu complex on the Cu(111) surface, which we identify as Cu2S3. We propose that Cu2S3 enhances mass transport in this system, which contradicts a previous proposal based on Cu3S3. We analyze bonding within these Cu-S complexes, identifying a principle for stabilization of sulfur complexes on coinage metal surfaces.

Description

This article is from Physical Review B 91 (2015): 045426, doi: 10.1103/PhysRevB.91.045426. Posted with permission.

Keywords
Ames Laboratory, Materials Science & Technology, Physics & Astronomy
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