Journal
CHEMISTRY OF MATERIALS
Volume 14, Issue 5, Pages 2176-2183Publisher
AMER CHEMICAL SOC
DOI: 10.1021/cm010375z
Keywords
-
Ask authors/readers for more resources
This paper describes the preparation of monodisperse colloids from various methacrylates. These colloids sediment well on glass slides and form-in the dried state-large three-dimensional face-centered cubic photonic crystal films with Bragg reflection in the visible region. Depending on crystallization conditions, the domain sizes vary between 50 and 300 pm. By cross-linking the polymer within the colloids, it is possible to increase the thermal stability of the polymeric photonic structure tremendously (up to 1 h at 200 degreesC). These photonic structures soften above T-g (rubbery photonic structure), but they cannot fuse. Crosslinked colloids from poly(tert-butyl methacrylate) can either thermally or chemically be modified. During thermal treatment (above 200 degreesC) the colloids shrink, as isobutene is split off. This allows a change of the lattice constant and the reflection color of an already crystallized dry photonic film. The acid-catalyzed cleavage of the ester bond allows the conversion of existing photonic structures into photonic crystals from core-shell colloids with hydrophilic polyelectrolytes in the shell.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available