Self-assembled polymeric solid films with temperature-induced large and reversible photonic-bandgap switching
- 28 November 2004
- journal article
- research article
- Published by Springer Science and Business Media LLC in Nature Materials
- Vol. 3 (12), 872-876
- https://doi.org/10.1038/nmat1254
Abstract
In aqueous solutions the response of polymers and biological matter to external conditions, such as temperature and pH, is typically based on the hydrophobic/hydrophilic balance and its effects on the polymer conformation. In the solid state, related concepts using competing interactions could allow novel functions. In this work we demonstrate that polymeric self-assembly, reversibility of hydrogen bonding, and polymer-additive phase behaviour allow temperature response in the solid state with large and reversible switching of an optical bandgap. A complex of polystyrene-block-poly(4-vinylpyridinium methanesulphonate) and 3-n-pentadecylphenol leads to the supramolecular comb-shaped architecture with a particularly long lamellar period. The sample is green at room temperature, as an incomplete photonic bandgap due to a dielectric reflector is formed. On heating, hydrogen bonds are broken and 3-n-pentadecylphenol additionally becomes soluble in polystyrene, leading to a sharp and reversible transition at approximately 125 degrees C to uncoloured material due to collapse of the long period. This encourages further developments, for example, for functional coatings or sensors in the solid state.Keywords
This publication has 27 references indexed in Scilit:
- Multicomb Polymeric Supramolecules and Their Self‐Organization: Combination of Coordination and Ionic InteractionsMacromolecular Rapid Communications, 2003
- Temperature‐Dependent Photonic Bandgap in a Self‐Assembled Hydrogen‐Bonded Liquid‐Crystalline Diblock CopolymerAdvanced Functional Materials, 2002
- Amplified Photoresponse of a p-Phenylazobenzene Derivative of an Elastin-like Polymer by α-Cyclodextrin: The Amplified ΔTt MechanismAdvanced Materials, 2002
- Tunable Optical Stop Band Utilizing Thermochromism of Synthetic Opal Infiltrated with Conducting PolymerJapanese Journal of Applied Physics, 1999
- Block copolymers as photonic bandgap materialsJournal of Lightwave Technology, 1999
- Mechanical Tuning of the Optical Properties of Plastic Opal as a Photonic CrystalJapanese Journal of Applied Physics, 1999
- Photonic crystals in the optical regime — past, present and futureProgress in Quantum Electronics, 1999
- An SAXS/WAXS beamline at the ESRF and future experimentsJournal of Macromolecular Science, Part B, 1998
- Mesomorphic Structures in Flexible Polymer−Surfactant Systems Due to Hydrogen Bonding: Poly(4-vinylpyridine)−PentadecylphenolMacromolecules, 1996
- Molecular Self-Assembly and Nanochemistry: a Chemical Strategy for the Synthesis of NanostructuresScience, 1991