Articles | Volume 24, issue 21
https://doi.org/10.5194/acp-24-12341-2024
https://doi.org/10.5194/acp-24-12341-2024
Research article
 | 
08 Nov 2024
Research article |  | 08 Nov 2024

Retrieval of refractive index and water content for the coating materials of aged black carbon aerosol based on optical properties: a theoretical analysis

Jia Liu, Cancan Zhu, Donghui Zhou, and Jinbao Han

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Cited articles

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Short summary
The hydrophilic coatings of aged black carbon (BC) particles absorb moisture during the hygroscopic growth process, but it is difficult to characterize how much water is absorbed under different relative humidities (RHs). In this study, we propose a method to obtain the water content in the coatings based on the equivalent complex refractive index retrieved from optical properties. This method is verified from a theoretical perspective, and it performs well for thickly coated BC at high RHs.
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