With its unique structure, the Akiyama probe is a type of tuning fork atomic\nforce microscope probe. The long, soft cantilever makes it possible to measure soft\nsamples in tapping mode. In this article, some characteristics of the probe at its second\neigenmode are revealed by use of finite element analysis (FEA) and experiments in a\nstandard atmosphere. Although the signal-to-noise ratio in this environment is not good\nenough, the 2 nm resolution and 0.09 Hz/nm sensitivity prove that the Akiyama probe can be\nused at its second eigenmode under FM non-contact mode or low amplitude FM tapping\nmode, which means that it is easy to change the measuring method from normal tapping to\nsmall amplitude tapping or non-contact mode with the same probe and equipment.
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