Fig. 7From: Graphene oxide liquid crystals: synthesis, phase transition, rheological property, and applications in optoelectronics and displayElectro-optical response based on different ionic solutions and concentrations. a The test cell model and images with and without electric field. b–d Dependence of birefringence (Δn) on electric field and concentration for (b) NaOH-GO dispersion, (c) HCl-GO dispersion, and (d) NaCl-GO dispersion [49]Back to article page