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Scientists find new approach to optically trapping and manipulating small particles

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Laser creates electrical field that can move particles

Gary Boas

Optical trapping supports a variety of applications throughout the biomedical research arena. Using light beams to create force gradients, it enables investigators to trap and control suspended particles and even to build three-dimensional nanostructures. But the technique is limited in application: It cannot be used alone with particles smaller than the wavelength of light, including DNA fragments, oligonucleotides, proteins and peptides. Researchers have developed methods to overcome this limitation. With one, for example, they attach the smaller molecules to larger particles called...Read full article

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    Published: June 2006
    Basic ScienceBiophotonicsResearch & Technology

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