Fig. 2: Macroscopic and microscopic aspects of the biobased optical ionogels prepared with C_nmimCl ILs, water, gelatin and the 5CB LC.

a–f POM images, with polarisers crossed at 90°, of optical ionogel films prepared with C₂, C₄, C₆, C₈, C₁₀ and C₁₂mimCl, respectively. The insets show inverted glass vials containing the ionogels.