Electron migration behavior of Au/Cu multilayer films on Si substrates under UV radiation

Literature Information

Publication Date 2014-12-17
DOI 10.1039/C4CP04124K
Impact Factor 3.676
Authors

Wenqing Yao, Jiangli Cao, Yunshuang Li, Yongfa Zhu, Lili Cao


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Abstract

Au/Cu multilayer films were plated by the magnetron sputtering method on p-Si(100) substrates. The sample temperature was changed from room temperature to 44 °C under UV radiation in a vacuum within 120 minutes, and then remained stable with treatment time increased. Meanwhile, the surface roughness was changed from 4.2 nm to 5.9 nm and then also remained stable. But the interface width of Au/Cu still continued to increase during that steady stage. The calculation results show that the concentration gradient of Cu atoms fell to 2.24 in 360 minutes from 3.45 at the beginning. The increase of defects in the grain boundaries of the Au layer was induced by UV radiation, because the Cu element had a smaller work function relative to the Au element and it was more likely to migrate to the surface layer through the grain boundaries of the Au layer.

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Source Journal

Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics
CiteScore: 5.5
Self-citation Rate: 10.3%
Articles per Year: 3036

Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.

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