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Fabrication of Short Circuit-Preventing Electrodes with a Self-assembled Monolayer on Flashlight-Sintered Porous Copper Nanofilms

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Abstract

This study reports the fabrication of copper nanoparticles (CuNPs)-based superhydrophobic electrode using flashlight sintering. To fabricate superhydrophobic electrode, CuNPs with polyvinylpyrrolidone (PVP) of various concentrations was sintered by flashlight irradiations. After then, the self-assembled monolayers (SAM) were formed by vapor-deposition of 1-dodecanethiol (DDT) on the CuNPs film. During flashlight sintering, the surface roughness of CuNPs film could be controlled by changing the concentration PVP. The surface roughness was tended to increase with the decreasing concentration of PVP. As a result, the largest roughness of 7.28 μmRa was obtained with 0.01 g of PVP. Due to the unique characteristic of flashlight sintering, the highly porous and rough surface could be obtained with superior electric conductivity from CuNPs. The harmonic effects of secondary roughness and hydrophobic surface were achieved by the flashlight sintering process and SAM, respectively. These led to the successful fabrication of superhydrophobic copper tracks (contact angle: 169.08° ± 11.36, resistance: 0.13 ± 0.05 Ω/sq). By dropping the water droplet on the electrode, the performance of short-circuit for water prevention was investigated.

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Acknowledgements

This research was supported by Kyungpook National University Research Fund, 2020.

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  1. Taeyong Kim and Tae Ho Yun are equally contributed

Authors and Affiliations

  1. Department of Advanced Science and Technology Convergence, Kyungpook National University (KNU), 2559, Gyeongsang-daero, Sangju-si, Gyeongsangbuk-do, 37224, Republic of Korea

    Taeyong Kim, Changyong Yim & Jisoo Kim

  2. Department of Precision Mechanical Engineering, Kyungpook National University (KNU), 2559, Gyeongsang-daero, Sangju-si, Gyeongsangbuk-do, 37224, Republic of Korea

    Tae Ho Yun & Jisoo Kim

  3. School of Nano and Materials Science and Engineering, Kyungpook National University (KNU), 2559, Gyeongsang-daero, Sangju-si, Gyeongsangbuk-do, 37224, Republic of Korea

    Changyong Yim

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Additional file 1 Short circuit test (without DDT deposition)

Additional file 2 Short circuit test (with DDT deposition)

Additional file 3 Water droplet demonstration of Cu-P1 film without DDT deposition (tilted at 20°)

Additional file 4 Water droplet demonstration of Cu-P1 film with DDT deposition (tilted at 20°)

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Kim, T., Yun, T.H., Yim, C. et al. Fabrication of Short Circuit-Preventing Electrodes with a Self-assembled Monolayer on Flashlight-Sintered Porous Copper Nanofilms. Int. J. Precis. Eng. Manuf. 24, 43–52 (2023). https://doi.org/10.1007/s12541-022-00728-w

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