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| Topographic view: AFM images taken with a modified commercial AFM (Nanoscope III, Digital Instruments) equipped with the group's DVD-based detection system. (Left) An image of a clean graphite surface obtained in tapping mode. Scan size: 5 x 5 microns. (Right) A frequency-modulation AFM image of DNA molecules on a graphite sample. The view shows a single atomic step. Scan size: 800 nm x 800 nm. (Image credit: Academia Sinica) |
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