Home > Discovery, Nature, Research, Science > Freezing water by warming it up!

Freezing water by warming it up!

February 7, 2010 Leave a comment Go to comments

Israel’s Weizmann Institute have figured out a way to freeze pure water by warming it up. The trick is that pure water has different freezing points depending on the electrical charge of the surface it resides on.

They found out that a negatively charged surface causes water to freeze at a lower temperature than a positively charged surface. By putting water on the pyroelectric material Lithium Tantalate, which has a negative charge when cooler but a positive change when warmer; water would remain a liquid down to -17 degrees C., and then freeze when the substrate and water were warmed up and the charge changed to positive, where water freezes at -7 degrees C.

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