Thin film coatings with potent antibacterial properties find critical applications in diverse domains such as medical devices, frequently touched surfaces, and food packaging for combating microbial proliferation across diverse scenarios. Two-dimensional photocatalytic antimicrobial coatings, offering a substantial actual-to-apparent surface ratio, hold immense potential for achieving this objective. However, realizing antibacterial performance not just under light but also in dark conditions remains a challenge. To address this, we present AgBr-coated vertically aligned ZnO nanorods (NRs) thin film architecture, employing a unique surfactant-mediated solution-phase spin-coating approach for achieving uniform deposition of AgBr onto ZnO NRs. The resulting ZnO NRs/AgBr heterojunction architectures have been characterized for their microstructural, morphological, elemental, optical, and wettability attributes. The studies have ascertained the tunability of AgBr content by modulating the concentration of its surfactant-based precursor solution. Further, valence band (VB) analyses revealed an increase in the electron density near to the VB edge. The dual role of AgBr as an antimicrobial agent and a photosensitizer, effectively enhancing the visible-light photodisinfection efficacy of ZnO NRs, has been evident through the dark-light dual mode antibacterial studies. Electron paramagnetic resonance measurements have shown hydroxyl radicals being majorly responsible for the visible-light photodisinfection performance. Encouragingly, reusability assessments showcase significant promise, while artificial sweat-wiping studies on the structures unveil heightened photodisinfection efficacy. This enhancement could be attributed to components like urea and lactic acid, speculated to augment the photocatalytic efficiency by minimizing charge recombination.

具有有效抗菌特性的薄膜涂层在医疗设备、经常接触的表面和食品包装等不同领域都有重要应用，以对抗不同场景下的微生物增殖。二维光催化抗菌涂层具有相当大的实际表面与表观表面比，具有实现这一目标的巨大潜力。然而，不仅在光照下而且在黑暗条件下实现抗菌性能仍然是一个挑战。为了解决这个问题，我们提出了 AgBr 涂层垂直排列的 ZnO纳米棒(NR) 薄膜结构，采用独特的表面活性剂介导的溶液相旋涂方法，实现 AgBr 均匀沉积到 ZnO NR 上。由此产生的 ZnO NRs/AgBr 异质结结构已对其微观结构、形态、元素、光学和润湿性属性进行了表征。研究通过调节基于表面活性剂的前体溶液的浓度来确定 AgBr 含量的可调性。此外，价带(VB) 分析显示靠近 VB 边缘的电子密度增加。通过暗光双模式抗菌研究，AgBr 作为抗菌剂和光敏剂的双重作用，有效增强 ZnO NRs 的可见光光消毒功效。电子顺磁共振测量表明羟基自由基是可见光光消毒性能的主要原因。令人鼓舞的是，可重复使用性评估显示出巨大的前景，而对结构的人工汗液擦拭研究则揭示了更高的光消毒功效。这种增强可能归因于尿素和乳酸等成分，推测它们通过最大限度地减少电荷重组来提高光催化效率。