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Influence of deposition time on the optical and morphological properties of silver–copper thin films: experimental and statistical studies

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Abstract

In this study, silver-copper layers were grown by DC magnetic sputtering under nitrogen gas at different time periods. Using AFM analysis, a relatively uniform distribution of almost spherical nanoparticles was observed on the surface of the layers, which by increasing the deposition time, the grain size also changed and in some areas on the surface became agglomerated. The average nanoparticle size is reported to be about 4 nm. Fractal and statistical analysis of the surface of the samples was investigated, and it was shown that the fractal dimension of smooth surfaces is larger than rough surfaces, which means higher reproducibility. In addition, using the absorption spectrum in the UV–visible region, it was shown that the Surface plasmon resonance (SPR) was shifted sharply toward higher Plasmon frequencies by escalating the deposition time.

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Noorbakhsh, R., Rezaee, S., Nia, B.A. et al. Influence of deposition time on the optical and morphological properties of silver–copper thin films: experimental and statistical studies. Opt Quant Electron 53, 276 (2021). https://doi.org/10.1007/s11082-021-02942-8

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