A1 Refereed original research article in a scientific journal
Multilayer films by spraying on spinning surface - Best of both worlds
Authors: Salomaki M, Peltonen T, Kankare J
Publisher: ELSEVIER SCIENCE SA
Publication year: 2012
Journal: Thin Solid Films
Journal name in source: THIN SOLID FILMS
Journal acronym: THIN SOLID FILMS
Number in series: 17
Volume: 520
Issue: 17
First page : 5550
Last page: 5556
Number of pages: 7
ISSN: 0040-6090
DOI: https://doi.org/10.1016/j.tsf.2012.04.055
Abstract
The layer-by-layer buildup of poly(styrene sulfonate), poly(diallyldimethyl ammonium) and/or TiO2-nanoparticles was carried out using an automated system which allowed spraying the polyion solutions on a spinning substrate. The different spraying and spinning arrangements were studied. The films were prepared by varying ionic strength, electrolyte species (NaBr and NaF) and spraying time. The results were compared to the films prepared by using the traditional dipping method. Depending on the electrolyte and the ionic strength the thickness of the films prepared with spraying on spinning substrate was thinner than or equal to the dipped films. It was found that addition of salt on spraying solutions is necessary in order to prepare thin films with a good quality. Spraying on spinning substrate generated evenly occupied smooth surfaces. The benefits of the automated method are attributed to the noticeably lower solution consumption and to the fact that the film deposition process could be accelerated by a factor of 100 comparing to the traditional dipping method. (C) 2012 Elsevier B.V. All rights reserved.
The layer-by-layer buildup of poly(styrene sulfonate), poly(diallyldimethyl ammonium) and/or TiO2-nanoparticles was carried out using an automated system which allowed spraying the polyion solutions on a spinning substrate. The different spraying and spinning arrangements were studied. The films were prepared by varying ionic strength, electrolyte species (NaBr and NaF) and spraying time. The results were compared to the films prepared by using the traditional dipping method. Depending on the electrolyte and the ionic strength the thickness of the films prepared with spraying on spinning substrate was thinner than or equal to the dipped films. It was found that addition of salt on spraying solutions is necessary in order to prepare thin films with a good quality. Spraying on spinning substrate generated evenly occupied smooth surfaces. The benefits of the automated method are attributed to the noticeably lower solution consumption and to the fact that the film deposition process could be accelerated by a factor of 100 comparing to the traditional dipping method. (C) 2012 Elsevier B.V. All rights reserved.
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