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Issue 27, 2009
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Electrochromism based on structural colour changes in a polyelectrolyte gel

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Abstract

Electrochromism based on structural colours was demonstrated by employing a simple system composed of a two-electrode cell, a salt-free organic solvent, and a nanostructured electroactive soft material. A polyelectrolyte gel, poly(HEMA-co-MAPTA-PF6), with an inverse-opal structure was prepared by using a polystyrene close-packed colloidal crystal as a template. The resulting gel swollen in binary organic solvents exhibited monochromatic structural colours. The structural colour of the gel was altered over the entire visible light region by changing the solvent polarity. Moreover, the structural colour could be tuned by applying a relatively low voltage, where the change in the lattice constant of the inverse-opal along the gel thickness direction, triggered by an electrodragging force on the polyelectrolyte gel under the electric field, was responsible for the colour change. The present system offers a novel concept for full-colour electrochromic materials, and the system can be tuned to exhibit the full range of colours by using single materials.

Graphical abstract: Electrochromism based on structural colour changes in a polyelectrolyte gel

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Publication details

The article was received on 08 Jan 2009, accepted on 20 Apr 2009 and first published on 22 May 2009


Article type: Paper
DOI: 10.1039/B900261H
Citation: J. Mater. Chem., 2009,19, 4778-4783
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    Electrochromism based on structural colour changes in a polyelectrolyte gel

    K. Ueno, J. Sakamoto, Y. Takeoka and M. Watanabe, J. Mater. Chem., 2009, 19, 4778
    DOI: 10.1039/B900261H

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