Fig. 2: Optimizing the recipe of bistable ERPC.

a, b Influence of PEG volume fraction and molecular weight on the holding of colorless state, indicated by the time evolution of reflection intensities and explained by c the measured viscosities of PCb-PEG mixtures; d, e influence of EG volume fraction on the holding of colorless state and quick recovery of colored state, explained by f the solubility parameters; g, h influence of volume fraction of SiO2 particles on bistability, and i assembly time and efficiency (ΔR/t) of corresponding ERPCs without electric field. The recipes of the above ERPCs are listed in Supplementary Table 1.