Tunable Angle-Independent Structural Color from a Phase-Separated Porous Gel


  • Y.T. gratefully acknowledges financial support from the Industrial Technology Research Grant Program in 2008 from the New Energy and Industrial Technology Development Organization (NEDO) of Japan (Grant 08C46502d).


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A porous gel exhibiting angle-independent structural color was obtained by a facile self-assembly approach. The porous swollen gel changes color reversibly in response to changes in solvent composition and temperature as a result of changes in the wavelength dispersions of the refractive indices of the gel portion and the solvent portion in the pores.