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The authors regret identifying an error in the supplementary information of the published article. We apologize for any inconvenience caused and assure that this error does not affect the main scientific findings Fig. S1B. Phase inversion screening for critical point determination. The error occurred in Fig. S1B of the supporting information, where incorrect confocal images led to a mistaken identification of the phase inversion position. The confocal images in boxes 1 to 6 are incorrect. In the correct confocal images, box 1 shows a water-in-oil (W/O), box 2 W/O, box 3 oil-in-water (O/W), box 4 O/W, box 5 O/W, box 6 O/W. The phase inversion from box 2 to box 3 suggests that the critical point lies between points 2 and 3 in the ternary phase diagram of Fig. S1B.

Particle-stabilized bicontinuous emulsions (bijels) are made of two interwoven liquid channel systems. In contrast to emulsion droplets, the liquid-liquid interface of bijels curves both towards the oil and the water phases. Thus, particles with equal wettability for both oil and water are needed to stabilize the interface. In this research paper, we enhance the understanding of nanoparticle functionalization by a surfactant for controlling the particle wettability. To this end, we develop a novel, single-channel, continuous flow method, enabling the rapid synthesis and analysis of bijels formed via solvent transfer induced phase separation (STrIPS). Silica nanoparticles are functionalized with the positively charged surfactant (cetyltrimethylammonium+, CTA+). Zeta-potential and colloidal stability analysis are employed to characterize the CTA+ functionalization. Confocal and electron microscopy are used to visualize the resulting bijel structures. Bijels with nearly uniform, sub-micrometer channels are obtained when the particle functionalization by CTA+ is regulated. To this end, the initial negative zeta-potential of the particles needs to be low enough to prevent excessive CTA+ adsorption. The adsorption is further controlled by adjusting the concentrations of CTA+, salt and glycerol additive. This report shows that the nanoparticle surfactant modification depends on multiple parameters, providing guidance for future bijel synthesis approaches.