Histograms showing the distribution of cantilever spring constants obtained using the methods and instruments indicated. The downward arrow at the top of each histogram indicates the spring constant as determined by the frequency scaling method. The histograms are for (a) the long cantilever, (b) the long cantilever, and (c) the long cantilever of a CLFC AFM probe.
Three typical resonance peaks for the (a) long cantilever, (b) long cantilever, and (c) long cantilever of a CLFC AFM probe are shown as collected by both AFM and LDV. The signal to noise ratios shown are the averages for each group of three curves over the bandwidths indicated by the frequency scale.
Results of spring constant calibrations for three cantilevers using the methods and instruments indicated. Average spring constants are given in units of N/m The standard deviations are also given in parentheses as percentages of the averages. No standard deviation is given for the frequency scaling method because the cantilever dimensions were only measured once and the density and modulus values used were taken from the manufacturer’s documentation.
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