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Microscopic Coolers Chill to Millikelvin Temperatures

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Solid-state on-chip refrigerators promise applications in a variety of fields, including materials analysis and astronomy.

Anne L. Fischer, Senior Editor

Ultralow temperatures are required for a variety of next-generation sensors, but refrigeration techniques for reaching 0.1 K have been complicated and expensive. Now a group at the National Institute of Standards and Technology (NIST) in Boulder, Colo., and at the University of Notre Dame in Indiana has found that solid-state on-chip devices can cool the contents of a suspended dielectric membrane from 320 to 225 mK with enough extra cooling power to operate a range of cryogenic sensors. The solid-state on-chip refrigerators cooled a germanium cube 11,000 times their size to approximately...Read full article

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    Published: June 2005
    Glossary
    astronomy
    The scientific observation of celestial radiation that has reached the vicinity of Earth, and the interpretation of these observations to determine the characteristics of the extraterrestrial bodies and phenomena that have emitted the radiation.
    astronomyBasic Sciencedielectric membraneFeaturesindustrialSensors & Detectorssolid-state on-chip devices

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