Comparative dynamics of magnetically, acoustically, and Brownian motion driven microcantilevers in liquids

Xu, Xianfan; Raman, Arvind

doi:10.1063/1.2767202

Cited by 128 publications

(118 citation statements)

References 30 publications

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“…However, the main drawback of using an external excitation when operating in viscous fluids is the low quality factor (Q) of the resonator and, especially for standard acoustic excitation, the presence of unwanted modes of oscillations due to the fluid-probe interaction. Such unwanted modes make the identification of the resonance peak very challenging and require complicated tuning and setup procedures [2].…”

Section: Introductionmentioning

confidence: 99%

Nonlinear behaviour of self-excited microcantilevers in viscous fluids

Mouro

Tiribilli

Paoletti

2017

J. Micromech. Microeng.

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Microcantilevers are increasingly being used to create sensitive sensors for rheology and mass sensing at the micro- and nano-scale. When operating in viscous liquids, the low quality factor of such resonant structures, translating to poor signal-to-noise ratio, is often manipulated by exploiting feedback strategies. However, the presence of feedback introduces poorly-understood dynamical behaviours that may severely degrade the sensor performance and reliability. In this paper, the dynamical behaviour of self-excited microcantilevers vibrating in viscous fluids is characterized experimentally and two complementary modelling approaches are proposed to explain and predict the behaviour of the closed-loop system. In particular, the delay introduced in the feedback loop is shown to cause surprising non-linear phenomena consisting of shifts and sudden-jumps of the oscillation frequency. The proposed dynamical models also suggest strategies for controlling such undesired phenomena.

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Section: Introductionmentioning

confidence: 99%

Nonlinear behaviour of self-excited microcantilevers in viscous fluids

Mouro

Tiribilli

Paoletti

2017

J. Micromech. Microeng.

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“…Putman et al have used a nitride silicon cantilever in water. Rankl et al have used a rectangular silicon cantilever in buffer (150mM NaCl, 5mM 4 2 PO NaH , pH=7.5). The parameters of Table 1 The TM frequency responses in both air and liquid obtained by Putman et al [5] shows that the frequency response of the cantilever in liquid is dramatically different from that in air.…”

Section: Simulation and Resultsmentioning

confidence: 99%

“…Magnetic, acoustic, and thermal (Brownian motion induced) excitations are commonly used for dynamic atomic force microscopy (AFM) in liquids [4]. Putman et al have used standard silicon nitride cantilevers, and extracted experimental amplitude-separation curve for tapping mode atomic force microscopy (AFM) in air and liquid and have considered differences between the diagrams in air and liquid [5].…”

Section: Introductionmentioning

confidence: 99%

Modeling and Simulation of Tapping-mode Atomic Force Microscopy in Liquid

Korayem

Ebrahimi²,

Korayem³

2012

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Application of atomic force microscopy (AFM) in liquid is necessary for imaging and manipulation of biological specimens. In this paper, we have simulated a tapping-mode AFM tilted cantilever in liquid environment near a surface by well defining the contact forces and extracting frequency response and amplitude versus separation diagrams. Contact forces have some differences in liquid in comparison to air or vacuum in magnitude or formulation. Hydrodynamic forces are also applied on the cantilever due to the motion in liquid. For modeling we have used a continuous beam model with its first mode and forward-time simulation method for simulation of its hybrid dynamics. Then we have extracted frequency response and amplitude versus diagrams in liquid. The results show good agreement with experiments. The resonance frequency in liquid is so smaller in comparison to air due to additional mass and additional damping. The results show that the effect of separation on free vibration amplitude and resonance frequency is considerable.

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“…32,33 This work was financially supported by the European Commission ͑FORCETOOL͒ and the Ministerio de Educación y Ciencia ͑MAT2006-03833͒. We do thank stimulating discussions with J.R. Lozano, S. Patil and N.F.…”

Section: ͑8͒mentioning

confidence: 99%

Frequency response of an atomic force microscope in liquids and air: Magnetic versus acoustic excitation

Herruzo¹,

García²

2007

Applied Physics Letters

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We discuss the dynamics of an amplitude modulation atomic force microscope in different environments such as water and air. Experiments, analytical expressions, and numerical simulations show that the resonance curves depend on the excitation method used to drive the cantilever, either mechanical or magnetic. This dependence is magnified for small force constants and quality factors, i.e., below 1 N / m and 10, respectively. We show that the equation for the observable, the cantilever deflection, depends on the excitation method. Under mechanical excitation, the deflection involves the base and tip displacements, while in magnetic excitation, the cantilever deflection and tip displacement coincide.

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Comparative dynamics of magnetically, acoustically, and Brownian motion driven microcantilevers in liquids

Cited by 128 publications

References 30 publications

Nonlinear behaviour of self-excited microcantilevers in viscous fluids

Nonlinear behaviour of self-excited microcantilevers in viscous fluids

Modeling and Simulation of Tapping-mode Atomic Force Microscopy in Liquid

Frequency response of an atomic force microscope in liquids and air: Magnetic versus acoustic excitation

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