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From University Herald
<blockquote>
Engineers at the University of Utah have discovered a new material that could generate electricity through body heat collected from a person's jewelry. It is said that the electricity is enough to power a body sensor, a cooking pan or could charge a phone in just a few hours.

The study was led by Ashutosh Tiwari, a University of Utah materials science and engineering professor. The team found that a combination of calcium, cobalt and terbium can be used to create an efficient, affordable and bio-friendly material that can generate electricity through a thermoelectric process that involves heat and cold air, EurekAlert reported.

The team's findings were published in the latest issue of "Scientific Reports." Shrikant Saini, a materials science and engineering postdoctoral researcher in the University of Utah, is the first author of the paper.

It was noted that the thermoelectric effect is a process involving temperature difference in a material and how it generates an electrical voltage. If one end of the material is cold while the other one is hot, charge carriers from the hot end flow through the material to the cold end. This generates an electrical voltage. The material requires less than one degree of difference in temperature to produce a detectable voltage.
</blockquote>
http://www.universityherald.com/articles/70155/20170321/university-utah-engineers-create-new-material-generate-electricity-body-heat.htm

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