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Concentration- and roughness-dependent antibacterial and antifungal activities of CuO thin films and their Cu ion cytotoxicity and elution behavior

  • Environmental Microbiology
  • Published:
Journal of Industrial Microbiology & Biotechnology

Abstract

In this study, we aimed to evaluate the antibacterial and antifungal properties, cytotoxicity, and elution behavior of copper oxide (CuO) thin films with varying concentrations and roughness values. CuO films greater than 0.2 mol % showed 99.9 % antimicrobial activity against Escherichia coli, Staphylococcus aureus, Campylobacter jejuni, and Penicillium funiculosum. Cu ions were found to be noncytotoxic in New Zealand white rabbits. The concentration of Cu ions from CuO thin films eluted in drinking water in 24 h at 100 °C was 0.014 μg L−1, which was below the standard acceptable level of 0.02 μg L−1. The transmittance of CuO thin film-coated glass was similar to that of parent glass. The antimicrobial activity, cytotoxicity, elution behavior, and transmittance of CuO deposited on glass suggest that these films could be useful in household devices and display devices.

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Acknowledgments

The authors would like to thank Prof. Kwang-Mahn Kim and Dr. Yu-Ri Choi from the Yonsei University College of Dentistry for their technical assistance.

Conflict of interest

The authors declare that they have no conflict of interest.

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Authors and Affiliations

  1. Department of Advanced Materials Science and Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, 120-749, Republic of Korea

    Gyu-In Shim, Seong-Hwan Kim, Hyung-Woo Eom & Se-Young Choi

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  1. Gyu-In Shim
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  2. Seong-Hwan Kim
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  3. Hyung-Woo Eom
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  4. Se-Young Choi
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Correspondence to Se-Young Choi.

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Shim, GI., Kim, SH., Eom, HW. et al. Concentration- and roughness-dependent antibacterial and antifungal activities of CuO thin films and their Cu ion cytotoxicity and elution behavior. J Ind Microbiol Biotechnol 42, 735–744 (2015). https://doi.org/10.1007/s10295-015-1601-1

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  • DOI: https://doi.org/10.1007/s10295-015-1601-1

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