20.500.12556/RUL-142605 Suppressing the Hofmeister anion effect by thermal annealing of thin-film multilayers made of weak polyelectrolytes Thin films made of weak polyelectrolytes poly(allylamine hydrochloride) (PAH) and poly(acrylic acid) (PAA) have been fabricated on silicon wafers using the layer-by-layer (LbL) method. To study the influence of counteranion type on the growth and properties of PAH/PAA multilayers, the nature of the supporting sodium salt was varied from cosmotropic to chaotropic anions (F$^–$, Cl$^–$, and ClO$_4$$^–$). Results of ellipsometry and AFM measurements indicate that the film thickness and surface roughness systematically increase on the order F$^–$ < Cl$^–$ < ClO$_4$$^–$. Furthermore, we found that the hydrophobicity of the PAH/PAA multilayer also follows the described trend when a polycation is the terminating layer. However, the heating of PAH/PAA multilayers to 60 °C during the LbL assembly suppressed the influence of background anions on the multilayer formation and properties. On the basis of the obtained results, it could be concluded that thermal annealing induces changes at the polymer–air interface in the sense of reorientation and migration of polymer chains. layers polyelectrolytes surface roughness thickness thin films plasti polielektroliti površinska hrapavost debelina tanki sloji true false true Angleški jezik Slovenski jezik Članek v reviji 2022-11-15 14:40:36 2022-11-15 14:40:38 2023-04-05 03:27:43 0000-00-00 00:00:00 2022 0 0 Str. 9571-9582 iss. 21 Vol. 55 2022 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 544.6.018.47-036.5 1520-5835 10.1021/acs.macromol.2c01517 129267715 acs.macromol.2c01517.pdf acs.macromol.2c01517.pdf 1 5AB2C1A47008EBFB444EE98E0D3008BB d07b2b21f872602693400ab1977ffbf401dfbbb93e2fc374bbb9f66f7ae30b57 95c8737b-d2b6-11ed-a314-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=167716 https://pubs.acs.org/doi/10.1021/acs.macromol.2c01517 0 fa594804-64ea-11ed-9c94-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=164035 Zdravstvena fakulteta 0 0 0