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Measurement Science and Technology &
Scanning Probe Microscopy

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Dynamic mode

For the daily use of AFM, the imaging in dynamic mode is more common than the contact mode, because tip and sample are spared.The students learn the relation between force constant and resonance frequency, repeat some knowledge about harmonic oscillating systems, resonances and Q-factors and get introduced to the basics of lockin amplification technique, which is used to evaluate the amplitudes and phase shifts.In the acquired images, material contrast can be obtained in the phase image in addition to the topography.