A simple and accurate method for calibrating the oscillation amplitude of tuning-fork based AFM sensors |
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Authors: | Liu Jinquan Callegari Andrea Stark Martin Chergui Majed |
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Affiliation: | Laboratoire de Spectroscopie Ultrarapide, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland. |
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Abstract: | We have developed a simple and accurate method for calibrating the amplitude of vibration of quartz tuning fork sensors commonly used in atomic force- and near field optical-microscopy. Unlike interferometric methods, which require a complex optical setup, the method we present requires only a simple measurement of the electro-mechanical properties of the tuning-fork oscillator and can be performed in a matter of minutes without disturbing the experimental setup. Comparison with interferometric methods shows that an accuracy of better than few percent can be routinely achieved. |
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Keywords: | SNOM NSOM AFM Tuning fork Interferometry |
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