We demonstrate a high-speed confocal-based interferometric scattering (iSCAT) microscopy for label-free live cell imaging. Using a spinning disk scanning unit, our wide-field iSCAT confocal microscope reaches a high image acquisition rate of 1,000 frames per second. Nano-sized objects, as small as 10 nm gold nanoparticles, are directly visualized by the iSCAT confocal microscope in scattering. With the high spatiotemporal resolutions and the high sensitivity, we explore the complex organization and dynamics in live cells.
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