Dynamic behaviour of tuning fork shear-force feedback

A.G.T. Ruiter; J.A. Veerman; Kees van der Werf; N.F. van Hulst

doi:10.1063/1.119482

Dynamic behaviour of tuning fork shear-force feedback

A.G.T. Ruiter, J.A. Veerman, Kees van der Werf, N.F. van Hulst

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Abstract

The dynamics of a tuning fork shear-force feedback system, used in a near-field scanning optical microscope, have been investigated, Experiments, measuring amplitude and phase of the tuning fork oscillation as a function of driving frequency and tip-sample distance, reveal that the resonance frequency of the tuning fork changes upon approaching the sample. Either amplitude or phase of the tuning fork can be used as distance control parameter in the feedback system. Using amplitude a second-order behavior is observed while with phase only a first-order behavior is observed, and confirmed by numerical calculations. This first-order behavior results in an improved stability of our feedback system, A sample consisting of DNA strands on mica was imaged which showed a height of the DNA of 1.4 nm

Original language	English
Pages (from-to)	28-30
Number of pages	3
Journal	Applied physics letters
Volume	71
Issue number	1
DOIs	https://doi.org/10.1063/1.119482
Publication status	Published - 1997

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10.1063/1.119482

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title = "Dynamic behaviour of tuning fork shear-force feedback",

abstract = "The dynamics of a tuning fork shear-force feedback system, used in a near-field scanning optical microscope, have been investigated, Experiments, measuring amplitude and phase of the tuning fork oscillation as a function of driving frequency and tip-sample distance, reveal that the resonance frequency of the tuning fork changes upon approaching the sample. Either amplitude or phase of the tuning fork can be used as distance control parameter in the feedback system. Using amplitude a second-order behavior is observed while with phase only a first-order behavior is observed, and confirmed by numerical calculations. This first-order behavior results in an improved stability of our feedback system, A sample consisting of DNA strands on mica was imaged which showed a height of the DNA of 1.4 nm",

author = "A.G.T. Ruiter and J.A. Veerman and {van der Werf}, Kees and {van Hulst}, N.F.",

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AU - Ruiter, A.G.T.

AU - Veerman, J.A.

AU - van der Werf, Kees

AU - van Hulst, N.F.

PY - 1997

Y1 - 1997

N2 - The dynamics of a tuning fork shear-force feedback system, used in a near-field scanning optical microscope, have been investigated, Experiments, measuring amplitude and phase of the tuning fork oscillation as a function of driving frequency and tip-sample distance, reveal that the resonance frequency of the tuning fork changes upon approaching the sample. Either amplitude or phase of the tuning fork can be used as distance control parameter in the feedback system. Using amplitude a second-order behavior is observed while with phase only a first-order behavior is observed, and confirmed by numerical calculations. This first-order behavior results in an improved stability of our feedback system, A sample consisting of DNA strands on mica was imaged which showed a height of the DNA of 1.4 nm

AB - The dynamics of a tuning fork shear-force feedback system, used in a near-field scanning optical microscope, have been investigated, Experiments, measuring amplitude and phase of the tuning fork oscillation as a function of driving frequency and tip-sample distance, reveal that the resonance frequency of the tuning fork changes upon approaching the sample. Either amplitude or phase of the tuning fork can be used as distance control parameter in the feedback system. Using amplitude a second-order behavior is observed while with phase only a first-order behavior is observed, and confirmed by numerical calculations. This first-order behavior results in an improved stability of our feedback system, A sample consisting of DNA strands on mica was imaged which showed a height of the DNA of 1.4 nm

U2 - 10.1063/1.119482

DO - 10.1063/1.119482

M3 - Article

SN - 0003-6951

VL - 71

SP - 28

EP - 30

JO - Applied physics letters

JF - Applied physics letters

IS - 1

ER -

Dynamic behaviour of tuning fork shear-force feedback

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