Wettability is important for photodynamic film sterilization since higher wettability enhances the capture of bacteria in contact with photosensitizers. Herein, a small number of violet phosphorus quantum dots (VPQDs) are anchored into hypericin bacterial cellulose films (VP/Hy‐BC films) to improve wettability, reducing the water contact angle from 56.8° to 33.0°. This modification facilitated more effective interactions between the bacteria and photosensitizers, rapidly inactivating 7 log10 CFU/mL of Staphylococcus aureus within 60 min. First‐principles calculations and molecular dynamics simulations reveal that VPQDs, with their low spatial site resistance, reduced the intermolecular Hy self‐aggregation force. This increased the solvent‐accessible surface area of VP/Hy by ≈25.7%, thereby decreasing hydrophobic photosensitizer aggregation. Consequently, more active sites are exposed, remarkably improving the photoelectron transfer efficiency. VP/Hy‐BC demonstrated exceptional efficacy in inhibiting bacterial proliferation; for instance, it extended beef shelf life by up to 10 days. The findings of this study will aid the development of health‐conscious, eco‐friendly, and efficient antimicrobial packaging films.

中文翻译：

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通过紫色磷量子点的锚定竞争增强光敏剂润湿性，以突破光动力薄膜灭菌


润湿性对于光动力薄膜灭菌很重要，因为较高的润湿性增强了与光敏剂接触的细菌的捕获。在此，少量紫磷量子点 （VPQD） 被锚定到金丝桃素细菌纤维素膜 （VP/Hy-BC 膜） 中以提高润湿性，将水接触角从 56.8° 降低到 33.0°。这种修饰促进了细菌和光敏剂之间更有效的相互作用，在 60 分钟内迅速灭活了 7 log10 CFU/mL 的金黄色葡萄球菌。第一性原理计算和分子动力学模拟表明，VPQD 具有低空间位点电阻，降低了分子间 Hy 自聚集力。这使得 VP/Hy 的溶剂可及表面积增加了 ≈25.7%，从而减少了疏水性光敏剂聚集。因此，暴露了更多的活性位点，显著提高了光电子转移效率。VP/Hy-BC 在抑制细菌增殖方面表现出非凡的疗效;例如，它将牛肉的保质期延长了长达 10 天。这项研究的结果将有助于开发注重健康、环保和高效的抗菌包装薄膜。