Figure 5From: Gold-ionic liquid nanofluids with preferably tribological properties and thermal conductivityThe preparation process and stabilization mechanism of the sample 4. I: the AuCl4- was reduced by sodium borohydride (NaBH4) and Au NPs modified by CTABr were quickly obtained; II: after standing for more than 5 months, the modified Au NPs could still exhibit ultrahigh stability due to the electrostatic repulsions and steric hindrances between different Au NPs.Back to article page