Noise intensity in the resonance frequency shift (Δf) signal of the cantilever oscillation, which is an indirect measure of force in non-contact atomic force microscopy, was calculated and compared with those measured experimentally. It is found that the output noise amplitude is proportional to the ratio of noise to the oscillation amplitude measured at the input of the frequency demodulator. Our analysis indicates that improving the sensitivity to cantilever deflection can reduce the noise in the Δf signal.
|ジャーナル||Japanese Journal of Applied Physics, Part 2: Letters|
|出版ステータス||Published - 2004 2月 15|
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