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

Fabian Muralter, Alberto Perrotta, Anna Maria Coclite*

*Korrespondierende/r Autor/-in für diese Arbeit

Publikation: Beitrag in einer FachzeitschriftArtikelBegutachtung

Abstract

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/cm3 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.

Originalspracheenglisch
Seiten (von - bis)9692-9699
Seitenumfang8
FachzeitschriftMacromolecules
Jahrgang51
Ausgabenummer23
DOIs
PublikationsstatusVeröffentlicht - 11 Dez. 2018

ASJC Scopus subject areas

  • Organische Chemie
  • Polymere und Kunststoffe
  • Anorganische Chemie
  • Werkstoffchemie

Kooperationen

  • NAWI Graz

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