5. Intermittent microscopy (TM)

In the field of polymers, the advent in 1995 of the TM intermittent mode microscope (or Tapping ^TM mode) has significantly increased the resolution of surface images of non-model polymers (with, for example, high surface roughness).

An oscillation of high frequency (300 kHz), close to the spring resonance frequency (high stiffness: k = 10 -40 N/m; quality factor Q = 100 to 1,000) and variable amplitude (A _i = 10 to 100 nm), is imposed on the spring [13] . Initially, the tip is far from the surface and the spring oscillates freely (amplitude A ₀ ). Then, when the surface is brought closer to the polymer, the tip, for each low position,...

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Intermittent microscopy (TM)

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page Microscopy in non-contact (or resonant) mode

Conclusion

References

(1) - BINNIG (G.), QUATE (C.F.), GERBER (C.) - Atomic force microscope. - Phys. Rev. Lett., 12, p. 930-933 (1986).
(2) - MIZES (H.A.), LOH (K.J.), MILLER (R.J.P.), AHUJA (S.K.), GRABOWSKI (E.F.) - Submicron probe of polymer adhesion with atomic force microscopy....