New approach for consideration of adsorption/desorption data

In this paper we proposed a new approach to modify the Langmuir model by considering nonlinear effects such as diffusion of water molecules in/out of an adsorbing film for humidity adsorption and desorption kinetics. The model was tested on the humidity adsorption and desorption data of a spin coated 50 nm thick Ruthenium polypridyl complex (Ru-PC K314) film, measured under relative humidity between 11% and 97% using by Quartz Crystal Microbalance (QCM) technique.

► A new Langmuir model was tested on a humidity adsorption and desorption kinetic data.
► For the identification of the new Langmuir model we used the ECs method.
► The new model helped to fit all available data.