Naslov
Influence of polyelectrolyte molar mass on formation and properties of PAH/PAA ultra-thin films

Autori
Masjar, Matej ; Klačić, Tin ; Kovačević, Davor

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Solid-State Science & Research 2021 : Book of Abstracts / Biliškov, Nikola ; Brekalo, Ivana ; Martinez, Valentina - Zagreb : Institut Ruđer Bošković, 2021, 71-71

ISBN
978-953-7941-35-2

Skup
Solid-State Science & Research 2021 (SCIRES2021)

Mjesto i datum
Zagreb, Hrvatska, 10.06.2021. - 11.06.2021

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Polyelectrolyte multilayers ; Thin films ; Molar mass of polyelectrolyte

Sažetak
Polyelectrolytes are macromolecules that contain ionic groups in their subunits. Examples of polyelectrolytes are poly(allylamine hydrochloride), PAH, and poly(acrylic acid), PAA. The charge density of these two polyelectrolytes strongly depends on the pH of the solution. In this study, PAH/PAA multilayers on the silicon surface were prepared by the layer-by-layer (LbL) technique using PAH and PAA of two different molar masses. Multilayers were prepared at three different pHs of 5, 8 and 10 with low ionic strength and pH = 8 at high ionic strength. In this way, all 4 conformation combinations that can be obtained with these polyelectrolytes are covered. During the preparation of the multilayer, the thickness of each layer was measured using ellipsometry, and after the multilayer of 10 layers was prepared, its thickness and surface roughness were determined using atomic force microscopy (AFM). The obtained results showed that the molar mass has a greater effect on the thickness of the obtained thin films when the polyelectrolytes are in a globular conformation, while when they are in an elongated conformation, the influence of the molar mass will be smaller.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

POVEZANOST RADA