Mcgrew writes to tell us that scientists at the health center of California, San Diego, have created a new system that can test any surface for just about anything. "Their idea uses a thin layer of metal drilled with nanoscale holes, laid onto the surface being tested. When the perforated plate is zapped with laser light, the surface plasmons that form emit light with a frequency related to the materials adjoining the plate. A sensuous
copyrights:cite this source roget's ii: the new thesaurus light detector is needed to measure the frequency of light given off. The team says devices using this imminence can be small and portable, will work on very low power, and could detect entirety from explosives to bacteria. All that needs to be done now is build a system able to decode the light signatures."
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