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Raman Whispering Gallery Detects Nanoparticles

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A Raman microlaser sensor can detect and count individual particles — including viruses — as small as 10 nm. Researchers led by Dr. Lan Yang of Washington University achieved Raman lasing in a silica microcavity or "whispering gallery". Within the microcavity, two modes of the beam emitted by the Raman laser circulate in opposite directions. When a particle lands on the ring and scatters energy between these modes, the single Raman lasing line splits into two lasing lines with different frequencies, which can be analyzed to confirm detection. When a nanoparticle...Read full article

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    Published: September 2014
    Glossary
    nanoparticle
    A small object that behaves as a whole unit or entity in terms of it's transport and it's properties, as opposed to an individual molecule which on it's own is not considered a nanoparticle.. Nanoparticles range between 100 and 2500 nanometers in diameter.
    AmericasBiophotonicsLan YangnanoparticleRaman lasersResearch & TechnologySahin Kaya Ozdemirwhispering galleryWashington University in St. Louis MissouriTech PulseBioScan

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