Department of Chemistry, University of California Riverside, Riverside, CA 92521, USA.
Chem Commun (Camb). 2021 Apr 4;57(26):3243-3246. doi: 10.1039/d1cc00066g. Epub 2021 Mar 1.
The hygroscopicity of respiratory aerosol determines their particle size distribution and regulates solute concentrations to which entrained microorganisms are exposed. Here, we report the hygroscopicity of simulated lung fluid (SLF) particles. While the response of aqueous particles follow simple mixing rules based on composition, we observe phase hysteresis with increasing and decreasing relative humidity (RH) and clear uptake of water prior to deliquescence. These results indicate that RH history may control the state of respiratory aerosol in the environment and influence the viability of microorganisms.
呼吸性气溶胶的吸湿性决定了它们的粒径分布，并调节了夹带微生物暴露的溶质浓度。在这里，我们报告了模拟肺液（SLF）颗粒的吸湿性。虽然水相颗粒的响应遵循基于组成的简单混合规则，但我们观察到相对湿度（RH）增加和减少时的相滞后以及在潮解之前明显的吸水。这些结果表明，RH 历史可能控制环境中呼吸性气溶胶的状态，并影响微生物的生存能力。
