Journal
LANGMUIR
Volume 29, Issue 36, Pages 11275-11283Publisher
AMER CHEMICAL SOC
DOI: 10.1021/la4023695
Keywords
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Funding
- Landesoffensive zur Entwicklung Wissenschaftlich-okonomischer Exzellenz (LOEWE Soft Control)
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Core-interlayer-shell (CIS) beads featuring noncross-linked hard cores were used to prepare large and well-defined elastomeric opal films with remarkably distinct iridescent reflection colors. The matrix of the opal films was cross-linked by UV-irradiation after compression molding of the CIS beads mixed with a bifunctional monomer. Stress-induced deformation of the embedded PS cores lead to hexagonally arranged spheroid oblates with an aspect ratio of 2.5. Optical characterization shows that bead deformation provokes a tremendous photonic band gap shift of about 160 nm. Fully reversible shape transition from the spheroid oblates back to the spherical beads and hence full recovery of the original photonic band gap can be achieved
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