Fig. 3
From: Supercooling of Water Controlled by Nanoparticles and Ultrasound
Effects of ultrasound and nanoparticles on the supercooling degree of water. ΔTU/ΔTW represents the ratio of supercooling degree required for the water solidification with ultrasound to that without ultrasound. ΔTN/ΔTW represents the ratio of supercooling degree required for the water solidification with nanoparticles to that without nanoparticles