Kim Ji-Hyeon, Mun ChaeWon, Ma Junfei, Park Sung-Gyu, Lee Seunghun, Kim Chang Su
Advanced Nano-Surface Department, Korea Institute of Materials Science, Changwon 51508, Korea.
School of Architectural, Civil, Environmental, and Energy Engineering, Kyungpook National University, Daegu 41566, Korea.
Nanomaterials (Basel). 2020 May 15;10(5):949. doi: 10.3390/nano10050949.
Cross-infection following cross-contamination is a serious social issue worldwide. Pathogens are normally spread by contact with germ-contaminated surfaces. Accordingly, antibacterial surface technologies are urgently needed and have consequently been actively developed in recent years. Among these technologies, biomimetic nanopatterned surfaces that physically kill adhering bacteria have attracted attraction as an effective technological solution to replace toxic chemical disinfectants (biocides). Herein, we introduce a transparent, colorless, and self-disinfecting polyethylene terephthalate (PET) film that mimics the surface structure of the (sanddragon) wing physically killing the attached bacteria. The PET film was partially etched via a 4-min carbon tetrafluoride (CF) plasma treatment. Compared to a flat bare PET film, the plasma-treated film surface exhibited a uniform array structure composed of nanopillars with a 30 nm diameter, 237 nm height, and 75 nm pitch. The plasma-treated PET film showed improvements in optical properties (transmittance and B*) and antibacterial effectiveness over the bare film; the transparency and colorlessness slightly increased, and the antibacterial activity increased from 53.8 to 100% for , and from 0 to 100% for . These results demonstrated the feasibility of the CF plasma-treated PET film as a potential antibacterial overcoating with good optical properties.
交叉污染后的交叉感染是一个全球性的严重社会问题。病原体通常通过接触受细菌污染的表面传播。因此，迫切需要抗菌表面技术，近年来也因此得到了积极发展。在这些技术中，能物理杀灭附着细菌的仿生纳米图案表面作为一种有效的技术解决方案，用以替代有毒化学消毒剂（杀生剂），已引起了人们的关注。在此，我们介绍一种透明、无色且具有自消毒功能的聚对苯二甲酸乙二酯（PET）薄膜，它模仿了（沙蚤）翅膀的表面结构，能物理杀灭附着的细菌。通过4分钟的四氟化碳（CF）等离子体处理对PET薄膜进行部分蚀刻。与平整的裸PET薄膜相比，经等离子体处理的薄膜表面呈现出由直径30纳米、高度237纳米、间距75纳米的纳米柱组成的均匀阵列结构。经等离子体处理的PET薄膜在光学性能（透光率和B*）和抗菌效果方面相较于裸薄膜有改进；透明度和无色程度略有提高，对[具体细菌名称1]的抗菌活性从53.8%提高到100%，对[具体细菌名称2]的抗菌活性从0提高到100%。这些结果证明了经CF等离子体处理的PET薄膜作为一种具有良好光学性能的潜在抗菌外涂层的可行性。
