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Tweezers Catch and Analyze Particles

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Kevin Robinson

Researchers at East Carolina University in Greenville, N.C., have developed a combined laser tweezers and Raman spectroscopy technique that enables them to capture and measure both transparent and nontransparent particles. The system could prove useful in industrial and scientific laboratories. A new laser tweezers setup (left, A) enables the trapping and analysis (below) of both transparent and nontransparent objects. On a nontransparent particle, the scattering force of a laser beam focused on the top of the particle (B) pushes it against the glass slide. The force also can catch a...Read full article

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