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Glue-free tuning fork shear-force microscope
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View: Figures


Image of FIG. 1.
FIG. 1.

Scanner assembly and tuning fork mount. (a) Sketch of the clamped piezotube (PT). : fixation screw, : PT outer diameter, : width of PT walls, and : diameter of the screw. (b) Resonance curves of the clamped piezotube for different torques exerted on the screw compared to a glued piezotube [(top phases shift) bottom: normalized amplitudes]. (c)–(e) Sketch of the tuning fork mount. (c) (side view) PT: piezotube, BP: insulating base plate, TF: tuning fork, : fiber, CL: clamp, B1: block with clamp and screws for fiber fixation, and B2: block with incorporated TF. (d) Rotated view without PT and BP. (e) Magnification of the indicated position in (d). : grove for fiber guidance, : screws for clamp fixation, : fiber bending amplitude, : distance between fixed fiber end and TF, : length of free fiber end, : distance between TF base and fiber, and : TF length.

Image of FIG. 2.
FIG. 2.

(a) Resonance curves for a repeatedly mounted fiber. (b) Resonance of the freely oscillating tuning fork.

Image of FIG. 3.
FIG. 3.

Approach curve towards a surface. Voltage oscillation amplitude (black) and frequency shift (gray) are recorded during approach (filled triangles) and retract (open triangles) starting from position .

Image of FIG. 4.
FIG. 4.

(a) Shear-force image of a calibration sample (2D200 by Nanosensors, scale bar). (b)–(d) Indicated line profile from (a). (b) : topography signal. (c) : voltage oscillation amplitude. (d) : frequency shift (error signal).


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Scitation: Glue-free tuning fork shear-force microscope