Bioaerosols, including infectious diseases such as COVID-19, are a continuous threat to global public safety. Despite their importance, the development of a practical, real-time means of monitoring bioaerosols has remained elusive. Here, we present a novel, simple, and highly efficient means of obtaining enriched bioaerosol samples. Aerosols are collected into a thin and stable liquid film by the unique interaction of a superhydrophilic surface and a continuous two-phase centrifugal flow. We demonstrate that this method can provide a concentration enhancement ratio of ∼2.4 × 10⁶ with a collection efficiency of ∼99.9% and an aerosol-into-liquid transfer rate of ∼95.9% at 500 nm particle size (smaller than a single bacterium). This transfer is effective in both laboratory and external ambient environments. The system has a low limit of detection of <50 CFU/m³_air using a straightforward bioluminescence-based technique and shows significant potential for air monitoring in occupational and public-health applications.

中文翻译：

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丰富的气溶胶到水溶胶的转移，可快速连续地监测生物气溶胶

生物气溶胶，包括传染病，例如COVID-19，一直是对全球公共安全的持续威胁。尽管它们很重要，但仍难以开发一种实用的实时监测生物气溶胶的方法。在这里，我们提出了一种新颖，简单，高效的方法来获取富集的生物气溶胶样品。通过超亲水表面和连续两相离心流的独特相互作用，将气溶胶收集到薄而稳定的液膜中。我们证明该方法可提供约2.4×10 ⁶的浓度增强比在500 nm粒径（小于单个细菌）下的收集效率为〜99.9％，气溶胶-液体转移率为〜95.9％。这种转移在实验室和外部环境中均有效。使用基于生物发光的直接技术，该系统具有低于50 CFU / m ³_空气的检测下限，并显示出在职业和公共卫生应用中进行空气监测的巨大潜力。