Is there a physical reason why AFM cantilevers are driven below their resonance frequencies?
In all of the AFMs I have used, once you measure the resonance frequency of the cantilever, it is set up to be driven slightly below this frequency for measurement. Is this a convention? Does driving at resonance cause damage? If not, then why is the cantilever not also driven above resonance? I seem to recall an engineer telling me that driving below resonance improves the resolution and referenced a paper - but I can't find this.