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Thickness-Dependent Swelling Behavior of Vapor-Deposited Smart Polymer Thin Films

[Image: see text] In this contribution, the temperature-dependent swelling behavior of vapor-deposited smart polymer thin films is shown to depend on cross-linking and deposited film thickness. Smart polymers find application in sensor and actuator setups and are mostly fabricated on delicate substr...

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Autores principales: Muralter, Fabian, Perrotta, Alberto, Coclite, Anna Maria
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2018
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6300310/
https://www.ncbi.nlm.nih.gov/pubmed/30591733
http://dx.doi.org/10.1021/acs.macromol.8b02120
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author Muralter, Fabian
Perrotta, Alberto
Coclite, Anna Maria
author_facet Muralter, Fabian
Perrotta, Alberto
Coclite, Anna Maria
author_sort Muralter, Fabian
collection PubMed
description [Image: see text] In this contribution, the temperature-dependent swelling behavior of vapor-deposited smart polymer thin films is shown to depend on cross-linking and deposited film thickness. Smart polymers find application in sensor and actuator setups and are mostly fabricated on delicate substrates with complex nanostructures that need to be conformally coated. As initiated chemical vapor deposition (iCVD) meets these specific requirements, the present work concentrates on temperature-dependent swelling behavior of iCVD poly(N-isopropylacrylamide) thin films. The transition between swollen and shrunken state and the corresponding lower critical solution temperature (LCST) was investigated by spectroscopic ellipsometry in water. The films’ density in the dry state evaluated from X-ray reflectivity could be successfully correlated to the position of the LCST in water and was found to vary between 1.1 and 1.3 g/cm(3) in the thickness range 30–330 nm. This work emphasizes the importance of insights in both the deposition process and mechanisms during swelling of smart polymeric structures.
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spelling pubmed-63003102018-12-25 Thickness-Dependent Swelling Behavior of Vapor-Deposited Smart Polymer Thin Films Muralter, Fabian Perrotta, Alberto Coclite, Anna Maria Macromolecules [Image: see text] In this contribution, the temperature-dependent swelling behavior of vapor-deposited smart polymer thin films is shown to depend on cross-linking and deposited film thickness. Smart polymers find application in sensor and actuator setups and are mostly fabricated on delicate substrates with complex nanostructures that need to be conformally coated. As initiated chemical vapor deposition (iCVD) meets these specific requirements, the present work concentrates on temperature-dependent swelling behavior of iCVD poly(N-isopropylacrylamide) thin films. The transition between swollen and shrunken state and the corresponding lower critical solution temperature (LCST) was investigated by spectroscopic ellipsometry in water. The films’ density in the dry state evaluated from X-ray reflectivity could be successfully correlated to the position of the LCST in water and was found to vary between 1.1 and 1.3 g/cm(3) in the thickness range 30–330 nm. This work emphasizes the importance of insights in both the deposition process and mechanisms during swelling of smart polymeric structures. American Chemical Society 2018-11-21 2018-12-11 /pmc/articles/PMC6300310/ /pubmed/30591733 http://dx.doi.org/10.1021/acs.macromol.8b02120 Text en Copyright © 2018 American Chemical Society This is an open access article published under an ACS AuthorChoice License (http://pubs.acs.org/page/policy/authorchoice_termsofuse.html) , which permits copying and redistribution of the article or any adaptations for non-commercial purposes.
spellingShingle Muralter, Fabian
Perrotta, Alberto
Coclite, Anna Maria
Thickness-Dependent Swelling Behavior of Vapor-Deposited Smart Polymer Thin Films
title Thickness-Dependent Swelling Behavior of Vapor-Deposited Smart Polymer Thin Films
title_full Thickness-Dependent Swelling Behavior of Vapor-Deposited Smart Polymer Thin Films
title_fullStr Thickness-Dependent Swelling Behavior of Vapor-Deposited Smart Polymer Thin Films
title_full_unstemmed Thickness-Dependent Swelling Behavior of Vapor-Deposited Smart Polymer Thin Films
title_short Thickness-Dependent Swelling Behavior of Vapor-Deposited Smart Polymer Thin Films
title_sort thickness-dependent swelling behavior of vapor-deposited smart polymer thin films
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6300310/
https://www.ncbi.nlm.nih.gov/pubmed/30591733
http://dx.doi.org/10.1021/acs.macromol.8b02120
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