General theory of amplitude-modulation atomic force microscopy |
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Authors: | Lee Manhee Jhe Wonho |
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Affiliation: | School of Physics and Astronomy, Seoul National University, Seoul 151-747, Korea. |
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Abstract: | We present a general analytical theory that enables one to determine accurately the unknown tip-sample interactions from the experimental measurement of the amplitude and phase of the oscillating tip in amplitude-modulation atomic force microscopy (AM-AFM). We apply the method to the known Lennard-Jones-type forces and find excellent agreement with the reconstructed results. AM-AFM, widely used in air and liquid, is now not only an imaging tool but also a quantitative force measurement tool. |
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