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Caption: Different types of nanoparticles -- in this case, shells, rods and solid spheres -- mixed together can be activated individually with pulsed laser light at different wavelengths, according to researchers at Rice University. The tuned particles' plasmonic response, enhanced by nanobubbles that form at the surface, can be narrowed to a few nanometers under a spectroscope and are easily distinguishable from each other.
Credit: Lapotko Group/Rice University
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