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
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