Fig. 5From: Supercooling of Water Controlled by Nanoparticles and UltrasoundComparison of the supercooling degrees of water controlled by ultrasound and nanoparticles mutually and separately [a Al2O3 nanoparticles, b SiO2 nanoparticles]. ΔTN-U/ΔTU represents the ratio of supercooling degree required for the water solidification with nanoparticles and ultrasound to that with ultrasoundBack to article page