Marie Freebody, [email protected]Layering dust onto a surface you wish to study may seem counterintuitive, but scientists in China and the US claim that their “smartdust” will enable Raman spectroscopy to be used on any surface. Surface-enhanced Raman scattering (SERS) is used widely for detecting molecules and trace materials. Although the powerful spectroscopy technique is popular among those working in inspection and analysis, the enhanced Raman signals needed for SERS are generated efficiently only by textured metal surfaces such as gold, silver or copper. 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