English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Zendy Plus

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Zendy Tools

Zendy Open

The diffusion of sodium dithionite (S 2 O 4  2- ) through polyelectrolyte multilayers of poly(diallyl dimethyl ammonium chloride) (PDADMAC)/poly(styrene sodium sulfonate) (PSS) assembled on colloidal particles with the layer-by-layer technique is studied by means of flow cytometry and quenching assay. Fluorescence is provided by a layer of (7-nitrobenz-2-oxa-1,3-diazol-4yl) amino) hexanoate (NBD)-labeled poly(allyl amine hydrochloride) assembled below the PDADMAC/PSS multilayer. NBD is quenched by a redox reaction with S 2 O 4  2- . NBD quenching is fast at short times but strongly retarded at longer times. Quenching is faster for PDADMAC as the top layer and for increasing concentrations of S 2 O 4  2- . The quenching kinetics of NBD is described with a model assuming a non-Fickean diffusion of S 2 O 4  2- , with diffusion coefficients that depend on time with an inverse power law. Diffusion coefficients show little dependence on the number of layers but are highly dependent on the concentration of S 2 O 4  2- . Increasing the concentration of S 2 O 4  2- over 10 mol/m 3 results in a decrease of the diffusion coefficient, more evident at longer times. The non-Fickean behavior for S 2 O 4  2- diffusion is explained on the basis of the trapping of dithionites in the multilayers.

the journal of physical chemistry b

Flow Cytometry Study of the Non-Fickean Diffusion of Small-Charged Molecules in Poly(diallyl dimethyl ammonium chloride)/Poly(styrene sodium sulfonate) Multilayers: Impact of the Layer Number, Top Layer, and Concentration of Diffusing Molecules