Near-field acoustic manipulation in a confined evanescent Bessel beam

Gires, Pierre-Yves; Poulain, Cédric

doi:10.1038/s42005-019-0191-z

Cited by 9 publications

(9 citation statements)

References 33 publications

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“…Although not widely used in acoustofluidics evanescent waves are described as very promising because the acoustic wave energy does not leak away [51] and they attract particles to surfaces [16]. Evanescent waves have been produced in a variety of systems [16,[51][52][53][54] all of which fulfil the requirement of a lower wave velocity in the solid than the fluid. The low wave velocity in the solid is generally achieved by using very thin walls.…”

Section: Node Creation In Non Resonant Evanescent Wave Acoustofluidic...mentioning

confidence: 99%

“…The low wave velocity in the solid is generally achieved by using very thin walls. The walls are driven with vibrations either directly [51,52,55,56] or with waves transferred through a liquid capillary bridge [16]. Good discussions of evanescent waves are given in Refs.…”

Section: Node Creation In Non Resonant Evanescent Wave Acoustofluidic...mentioning

confidence: 99%

“…(5)Acoustic radiation attracts yeast cells to the pressure nodes on the surface. (The force may be a second order term [52]).…”

Section: Node Theory Model Ntm-2: Nodes Formed With Evanescent Wavesmentioning

confidence: 99%

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Node formation mechanisms in acoustofluidic capillary bridges

et al. 2022

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Using acoustofluidic channels formed by capillary bridges two models are developed to describe nodes formed by leaky and by evanescent waves. The liquid channel held between a microscope slide (waveguide) and a strip of polystyrene film (fluid guide) avoids solid-sidewall interactions. With this simplification, our experimental and numerical study showed that waves emitted from a single plane surface, interfere and form the nodes without any resonance in the fluid. Both models pay particular attention to tensor elements normal to the solid-liquid interfaces they find that; initially nodes form in the solid and the node pattern is replicated by waves emitted into the fluid from antinodes in the stress. At fluids depths near half an acoustic wavelength, most nodes are formed by leaky waves. In the glass, water-loading reduces node-node separation and forms an overlay type waveguide which aligns the nodes predominantly along the channel. One new practical insight is that node separation can be controlled by water depth. At 0.2 mm water depths (which are smaller than a ¼ wavelength) nodes form from evanescent waves. Here a suspension of yeast cells formed a pattern of small dot-like clumps of cells on the surface of the polystyrene film. We found the same pattern in sound intensity normal, and close, to the waterpolystyrene interface. The capillary bridge channel developed for this study is simple, low-cost, and could be developed for filtration, separation, or patterning of biological species in rapid immuno-sensing applications.

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Section: Node Creation In Non Resonant Evanescent Wave Acoustofluidic...mentioning

confidence: 99%

Section: Node Creation In Non Resonant Evanescent Wave Acoustofluidic...mentioning

confidence: 99%

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Node formation mechanisms in acoustofluidic capillary bridges

et al. 2022

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“…Near-field acoustic manipulation suitable to operate with micro and nanoparticles in a confined evanescent Bessel beam was proposed by Gires and Poulain [1]. Xu et al [2] analysed acoustic manipulation of microparticles in a cylindrical cavity using the acoustic radiation force.…”

Section: Introductionmentioning

confidence: 99%

Analysis on Conveying of Miniature and Microparts on a Platform Subjected to Sinusoidal Displacement Cycles with Controlled Dry Friction

Kilikevičius

Fedaravičius

Daukantienė

et al. 2022

mech

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This paper presents a novel method for convey-ing of miniature and microparts on a subjected to sinusoi-dal displacement cycles in the horizontal direction when the effective coefficient of dry friction between the part and the platform is periodically being controlled. Hereby, the required dynamic directionality is achieved via the system asymmetry created by periodic alteration of the effective coefficient of dry friction between the micropart and the platform. A mathematical model of conveying process is developed and solved numerically to determine the influence of frictional properties, friction control and sinusoidal excitation parameters on the conveying process characteristics. It was found that the velocity and direction of conveying can be easily controlled in a wide range by changing the phase shift between the function of the ef-fective dry friction coefficient and the function of horizon-tal sinusoidal displacement cycles as well as the duration of effective dry friction coefficient reduction. To test the theoretical findings in practise, an experimental setup for micropart conveying with controlled dry friction was cre-ated and build. The experimental results revealed the func-tional capabilities of the proposed method for micropart conveying by demonstrating how the velocity, direction and step size are controlled by regulating the parameters of friction control and sinusoidal excitation.The proposed method can be practically used in conveying, feeding, manipulation and assembly systems for miniature and microparts in the mechatronics, elec-tronic and other industries.

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“…These methods are relatively easily implemented and cost-effective techniques, especially for manipulation with high quantities of miniature and microminiature particles, as they do not require grippers and there is no mechanical contact or contamination involved [ 16 ]. Near-field acoustic manipulation, which is suitable to transfer micro and nanoparticles in a confined evanescent Bessel beam, was proposed by Gires and Poulain [ 17 ]. Wijaya et al [ 18 ] analyzed the manipulation of microspheres by applying acoustic levitation.…”

Section: Introductionmentioning

confidence: 99%

Manipulation of Miniature and Microminiature Bodies on a Harmonically Oscillating Platform by Controlling Dry Friction

et al. 2021

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Currently used nonprehensile manipulation systems that are based on vibrational techniques employ temporal (vibrational) asymmetry, spatial asymmetry, or force asymmetry to provide and control a directional motion of a body. This paper presents a novel method of nonprehensile manipulation of miniature and microminiature bodies on a harmonically oscillating platform by creating a frictional asymmetry through dynamic dry friction control. To theoretically verify the feasibility of the method and to determine the control parameters that define the motion characteristics, a mathematical model was developed, and modeling was carried out. Experimental setups for miniature and microminiature bodies were developed for nonprehensile manipulation by dry friction control, and manipulation experiments were carried out to experimentally verify the feasibility of the proposed method and theoretical findings. By revealing how characteristic control parameters influence the direction and velocity, the modeling results theoretically verified the feasibility of the proposed method. The experimental investigation verified that the proposed method is technically feasible and can be applied in practice, as well as confirmed the theoretical findings that the velocity and direction of the body can be controlled by changing the parameters of the function for dynamic dry friction control. The presented research enriches the classical theories of manipulation methods on vibrating plates and platforms, as well as the presented results, are relevant for industries dealing with feeding, assembling, or manipulation of miniature and microminiature bodies.

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Near-field acoustic manipulation in a confined evanescent Bessel beam

Cited by 9 publications

References 33 publications

Node formation mechanisms in acoustofluidic capillary bridges

Node formation mechanisms in acoustofluidic capillary bridges

Analysis on Conveying of Miniature and Microparts on a Platform Subjected to Sinusoidal Displacement Cycles with Controlled Dry Friction

Manipulation of Miniature and Microminiature Bodies on a Harmonically Oscillating Platform by Controlling Dry Friction

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