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Proceedings Paper

Multi-stimuli-responsive elastomeric opal films: processing, optics, and applications
Author(s): Christian G. Schäfer; Markus Gallei; Götz P. Hellmann; Markus Biesalski; Matthias Rehahn
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Paper Abstract

A new strategy to build large-scale solvent-responsive elastomeric opal films that are candidates for a wide range of optical sensor applications is reported. Hard-soft core-interlayer-shell (CIS) beads were used to prepare paper-supported elastomeric opal films with remarkably distinct iridescent reflection colors. Extrusion and compression molding of the CIS beads directly on the top of a highly porous paper sheet followed by UV cross-linking led to polymer-paper composite films with a high tensile strength and an outstanding solvent resistivity. Due to the high porosity of the paper sheets used, these composites could be easily swollen by various solvents. The swelling changed the crystalline lattice of the opals which provoked a tremendous photonic band gap shift and also enhanced the brilliance of these colors. After deswelling, the original opal structure was totally restored which means that the shift of the photonic band gap was completely reversible. This approach can become the basis for a whole family of polymer-based soft sensors with a fascinating optical response.

Paper Details

Date Published: 26 September 2013
PDF: 13 pages
Proc. SPIE 8816, Nanoengineering: Fabrication, Properties, Optics, and Devices X, 88160V (26 September 2013); doi: 10.1117/12.2023876
Show Author Affiliations
Christian G. Schäfer, Technische Univ. Darmstadt (Germany)
Markus Gallei, Technische Univ. Darmstadt (Germany)
Götz P. Hellmann, Technische Univ. Darmstadt (Germany)
Markus Biesalski, Technische Univ. Darmstadt (Germany)
Matthias Rehahn, Technische Univ. Darmstadt (Germany)

Published in SPIE Proceedings Vol. 8816:
Nanoengineering: Fabrication, Properties, Optics, and Devices X
Eva M. Campo; Elizabeth A. Dobisz; Louay A. Eldada, Editor(s)

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