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

TitleCu2S3 complex on Cu(111) as a candidate for mass transport enhancement
Publication TypeJournal Article
Year of Publication2015
AuthorsWalen, H, Liu, DJ, Oh, J, Lim, H, Evans, JW, Aikens, CM, Kim, Y, Thiel, PA
JournalPhysical Review B
Volume91
Pagination045426
Date Published01
Type of ArticleArticle
ISBN Number1098-0121
Accession NumberWOS:000348648500003
Keywordsapproximation, catalyst, growth, hydrogen, metal-surfaces, oxygen, scanning tunneling microscope, sulfur, surface self-diffusion
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.

DOI10.1103/PhysRevB.91.045426
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Chemical Physics

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NSF