Source: https://www.researchgate.net/publication/335981714_Asymmetric_field_flow_fractionation_applied_to_the_nanoparticles_characterization_Study_of_the_parameters_governing_the_retention_in_the_channel/fulltext/5d88bb21a6fdcc8fd613e99a/Asymmetric-field-flow-fractionation-applied-to-the-nanoparticles-characterization-Study-of-the-parameters-governing-the-retention-in-the-channel.pdf