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Role of Substrate Type in the Process of Polyelectrolyte Multilayer Formation

Polyelectrolyte multilayers are coatings formed by the alternate deposition of polycations and polyanions on a charged surface. In this study we examined how the type of substrate affects a multilayer prepared from poly(allylamine hydrochloride) and poly(acrylic acid). Silicon and titanium wafers we...

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Autores principales: Mesić, Mia, Klačić, Tin, Abram, Anže, Bohinc, Klemen, Kovačević, Davor
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9269168/
https://www.ncbi.nlm.nih.gov/pubmed/35808612
http://dx.doi.org/10.3390/polym14132566
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author Mesić, Mia
Klačić, Tin
Abram, Anže
Bohinc, Klemen
Kovačević, Davor
author_facet Mesić, Mia
Klačić, Tin
Abram, Anže
Bohinc, Klemen
Kovačević, Davor
author_sort Mesić, Mia
collection PubMed
description Polyelectrolyte multilayers are coatings formed by the alternate deposition of polycations and polyanions on a charged surface. In this study we examined how the type of substrate affects a multilayer prepared from poly(allylamine hydrochloride) and poly(acrylic acid). Silicon and titanium wafers were used as substrates. Their properties were systematically studied using ellipsometry, tensiometry, atomic force microscopy and streaming potential measurements. Multilayers were built up at pH = 7 with tetramethylammonium chloride as the background salt. The growth of films was monitored by ellipsometry, while the morphology and surface roughness were determined by atomic force microscopy. It was found that the thickness of multilayers containing 10 layers on silicon is 10 nm, whereas the thickness of the same film on titanium is three times higher. It was shown that multilayers formed on silicon display a grain-like structure, which was not the case for a film formed on titanium. Such morphological properties are also reflected in the surface roughness. Finally, it was shown that, in addition to the electrostatic interactions, the hydrophobicity of the substrate also plays an important role in the polyelectrolyte multilayer formation process and influences its thickness and properties.
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spelling pubmed-92691682022-07-09 Role of Substrate Type in the Process of Polyelectrolyte Multilayer Formation Mesić, Mia Klačić, Tin Abram, Anže Bohinc, Klemen Kovačević, Davor Polymers (Basel) Article Polyelectrolyte multilayers are coatings formed by the alternate deposition of polycations and polyanions on a charged surface. In this study we examined how the type of substrate affects a multilayer prepared from poly(allylamine hydrochloride) and poly(acrylic acid). Silicon and titanium wafers were used as substrates. Their properties were systematically studied using ellipsometry, tensiometry, atomic force microscopy and streaming potential measurements. Multilayers were built up at pH = 7 with tetramethylammonium chloride as the background salt. The growth of films was monitored by ellipsometry, while the morphology and surface roughness were determined by atomic force microscopy. It was found that the thickness of multilayers containing 10 layers on silicon is 10 nm, whereas the thickness of the same film on titanium is three times higher. It was shown that multilayers formed on silicon display a grain-like structure, which was not the case for a film formed on titanium. Such morphological properties are also reflected in the surface roughness. Finally, it was shown that, in addition to the electrostatic interactions, the hydrophobicity of the substrate also plays an important role in the polyelectrolyte multilayer formation process and influences its thickness and properties. MDPI 2022-06-24 /pmc/articles/PMC9269168/ /pubmed/35808612 http://dx.doi.org/10.3390/polym14132566 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Mesić, Mia
Klačić, Tin
Abram, Anže
Bohinc, Klemen
Kovačević, Davor
Role of Substrate Type in the Process of Polyelectrolyte Multilayer Formation
title Role of Substrate Type in the Process of Polyelectrolyte Multilayer Formation
title_full Role of Substrate Type in the Process of Polyelectrolyte Multilayer Formation
title_fullStr Role of Substrate Type in the Process of Polyelectrolyte Multilayer Formation
title_full_unstemmed Role of Substrate Type in the Process of Polyelectrolyte Multilayer Formation
title_short Role of Substrate Type in the Process of Polyelectrolyte Multilayer Formation
title_sort role of substrate type in the process of polyelectrolyte multilayer formation
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9269168/
https://www.ncbi.nlm.nih.gov/pubmed/35808612
http://dx.doi.org/10.3390/polym14132566
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