By reinterpreting thermoelectric technology decades ago, UCLA scientists have developed a tiny micro cooling device that they describe as the world’s smallest refrigerator;. It won’t be a cold storage space for leftovers and coke, but the team hopes that this nanoscale device can serve as a springboard for advanced systems that can cool things almost instantaneously. < p > < p > Thermoelectric equipment consists of a pair of semiconductors placed between metallized plates and works by generating electricity from the temperature difference between the two sides. The nasa-1 spacecraft is powered by these thermoelectric instruments. < / P > < p > the authors of the new study are trying to take advantage of thermoelectric principles in a slightly different way. In addition to generating electricity, these devices can also work in reverse. When an electric current is applied to the device, it makes one side hot and the other side cold, which enables it to work as a thermoelectric cooler. The small cooler developed by UCLA team uses semiconducting materials called bismuth telluride and antimony bismuth telluride The tape is attached to the material and then peeled off, and scientists can purchase single crystals that they use to make thermoelectric devices that are only 100 nanometers thick, or about 10 millionths of a meter thick. It can be seen that a dewdrop (green) is formed at the overlap of the two semiconductor materials in the tiny device as evidence of its cooling effect. “We set a world record, more than 10000 times smaller than the current minimum thermoelectric cooler,” said Xin Yi Ling, one of the authors of the paper. But this little refrigerator is more than just a gimmick. Some advantages of thermoelectric refrigeration equipment include high reliability and small size due to the lack of moving parts. However, they are not yet able to generate enough power and maintain enough cooling capacity to be used on a larger scale. < / P > < p > led by Chris Regan, Professor of physics at UCLA “Although it’s only one millimeter cubic meter in size, it cools millions of times faster than a traditional refrigerator, and once we understand how thermoelectric refrigerators work at the atomic and near atomic levels, we can scale up to the macro scale, where the big payoff is,” he said. Chinese version of K-car: reading a10e design drawing exposure

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