Tuning fork shear-force feedback

Ruiter, A.G.T.; Werf, Kees O. van der; Veerman, J.A.; García-Parajo, María F.; Rensen, W.H.J.; Hulst, Niek F. van

doi:10.1016/s0304-3991(97)00111-3

Cited by 59 publications

(52 citation statements)

References 13 publications

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“…For the vibration amplitude of the tuning fork's prongs, which linearly depends on the driving voltage [35][36][37], we can estimate the experimental sensitivity of the fork prong's displacement to about 0.14 nm= ffiffiffiffiffiffi Hz p (see more details in Sec. 3 in the Supplemental Material [29]).…”

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confidence: 99%

Single Molecule as a Local Acoustic Detector for Mechanical Oscillators

2014

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A single molecule can serve as a nanometer-sized detector of acoustic strain. Such a nanomicrophone has the great advantage that it can be placed very close to acoustic signal sources and high sensitivities can be achieved. We demonstrate this scheme by monitoring the fluorescence intensity of a single dibenzoterrylene molecule in an anthracene crystal attached to an oscillating tuning fork. The characterization of the vibration amplitude and of the detection sensitivity is a first step towards detection and control of nanomechanical oscillators through optical detection and feedback.

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confidence: 99%

Single Molecule as a Local Acoustic Detector for Mechanical Oscillators

2014

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“…It seems to be obvious, because the phase signal allows to obtain relatively large detection sensitivity (see approach curve). This conclusion was also described by Ruiter et al [21], where the bandwidths of phase and amplitude were theoretically and experimentally compared and concluded that the bandwidth of amplitude signal is attenuated with 12 dB/oct, while of phase signal with 6 dB/oct. In the case of X detection, the excitation frequency does not affect significantly the response, so practically any frequency from the resonance range could be used.…”

Section: Optimization Of Tip Oscillation Frequency and Detection Methodmentioning

confidence: 51%

The issues of near field interaction detection in developed combined shear force/ emission microscope

Sikora

Gotszalk

2009

J. Phys.: Conf. Ser.

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Abstract. The shear force microscopy is one of few AFM methods which allow to scan the surface in the non-contact regime. The advantage of this technique is the possibility of investigation soft and fragile samples. The detection of near field interactions is performed by measurement of the oscillation amplitude of the scanning tip, which oscillates laterally to the surface. Although the method is used effectively in various applications (i.e. SNOM), the origin of the phenomena is still discussed and investigated. In this article we describe some particular experiments performed in order to develop the home built shear force microscope which was combined with emission measurement module. We also present the solution, which allows to prevent unwanted behaviour of the PID regulator, when the electrical field is applied to the tip.

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“…Since the original publication, a number of instruments utilizing piezoelectric tip-sample distance control have been reported. [2][3][4][5][6][7][8][9] Most of them operate in the ''shear-force mode,'' with the fiber tip attached along one of the tines of the tuning fork, oriented such that the tip vibrates parallel to the surface of the sample. An alternative mode of operation, the ''tapping mode,'' wherein the fiber tip vibrates perpendicularly to the surface, offers the advantage of a higher force gradient, and hence, a more reliable tip-sample distance control as well as a higher resolution.…”

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A near-field scanning optical microscope with a high Q-factor piezoelectric sensing element

Davydov

Shelimov

Haslett

et al. 1999

Applied Physics Letters

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A tapping-mode near-field scanning optical microscope utilizing a piezoelectric microtuning fork as its height-sensing element is described. We have developed a method for modifying and attaching an optical fiber to the tuning fork that allows the assembly to retain a Q factor of up to 9000, substantially higher than the Q factors described so far in the literature for tuning-fork-based instruments. The method involves reducing the diameter of the cladding of the optical fiber down to 17–25 μm using several chemical etching steps, before the fiber is attached to the tuning fork. A sharp upturn in the Q factor is observed when the fiber diameter d drops below ∼25 μm. An analysis showing that the stretching force constant of a bent fiber is proportional to d4 accounts for the great sensitivity of the Q factor to the fiber diameter. The high Q factors result in improved force sensitivity and allow us to construct a tapping-mode instrument without the use of additional dithering piezoelements.

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Tuning fork shear-force feedback

Cited by 59 publications

References 13 publications

Single Molecule as a Local Acoustic Detector for Mechanical Oscillators

Single Molecule as a Local Acoustic Detector for Mechanical Oscillators

The issues of near field interaction detection in developed combined shear force/ emission microscope

A near-field scanning optical microscope with a high Q-factor piezoelectric sensing element

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