A novel Cu-bearing high-entropy alloy with significant antibacterial behavior against corrosive marine biofilms

Enze Zhou, Dongxu Qiao, Yi Yang, Dake Xu, Yiping Lu, Jianjun Wang, Jessica A. Smith, Huabing Li, Hongliang Zhao, Peter K. Liaw, Fuhui Wang

Table 2 Biofilm thickness of each alloy material (AHEA, 304 SS, 304 Cu-SS, and Cu) after incubation with P. aeruginosa or B. vietnamensis for one, three, and seven days.

Materials P. aeruginosa B. vietnamensis Largest biofilm thickness (μm) Average biofilm thickness (μm) Largest biofilm thickness (μm) Average biofilm thickness (μm) After one day 304 SS 50.7 45.1 ± 3.1 34.3 33.3 ± 0.8 304 Cu-SS 42.8 40.5 ± 1.7 38.1 36.6 ± 1.3 AHEA 31.4 27.5 ± 2.3 28 24.3 ± 2.8 Cu 38.4 29.1 ± 6.1 25.5 24.9 ± 0.7 After three days 304 SS 59.6 49.4 ± 6.8 51.3 46.8 ± 3.9 304 Cu-SS 47.4 44.5 ± 2.2 54.5 49.9 ± 4.5 AHEA 39.6 37.4 ± 2.4 36.0 34.8 ± 1.6 Cu 36.2 30.5 ± 4.0 28.8 27.4 ± 1.3 After seven days 304 SS 54.6 50.3 ± 3.7 52.7 47.2 ± 3.6 304 Cu-SS 50.9 47.3 ± 2.2 53.8 49.2 ± 3.7 HEA 34.2 30.9 ± 3.9 37.4 31.4 ± 3.1 Cu 38.3 28.4 ± 6.4 32.8 29.0 ± 2.0