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A contactless methodology of picking up micro-particles from rigid surfaces by acoustic radiation force
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10.1063/1.3676636
/content/aip/journal/rsi/83/1/10.1063/1.3676636
http://aip.metastore.ingenta.com/content/aip/journal/rsi/83/1/10.1063/1.3676636

Figures

Image of FIG. 1.
FIG. 1.

The experimental apparatus for contactless picking up micro-particles from rigid surfaces by acoustic radiation force, (a) schematic view of the apparatus, (b) apparatus photo in which consists of transducers, glass platform, power amplifiers, multi-channel function generators.

Image of FIG. 2.
FIG. 2.

Geometrical parameters pertaining to the scattering of two obliquely incident acoustic plane waves by a sphere near a rigid plane acoustically hard surface. The coordinate of point p is (r, θ, φ = 0) in spherical coordinate centered at O.

Image of FIG. 3.
FIG. 3.

The vertical F z and horizontal F x components of the acoustic radiation force on the particle near a plane acoustically hard surface. (a) The vertical component while x = 0, point A represents the position where the vertical component of the acoustically radiation force is zero. (b) The horizontal component while z = λ/2π, points A and B represent the positions where the horizontal component of the acoustic radiation force is zero.

Image of FIG. 4.
FIG. 4.

The pressure distribution in the vertical profile passing through the axis of the transducers. Standing wave field is formed in the region of x = (−5, 5) mm and y = (0, 5) mm.

Image of FIG. 5.
FIG. 5.

Directivity w(k, θ l , ϕ l ) of the sound field due to the plane waves, illustrated using three-dimensional plot as a function of (θ, ϕ).

Image of FIG. 6.
FIG. 6.

Procedure of picking up the acid washed silica bead adherent to the upper surface of the glass platform. (a) The sound field is not formed in the space, the bead adheres to the surface; (b) with the amplitude of the applied sinusoidal signal increasing, the bead moves towards left and then stops; (c) the bead is picked up away from the surface, when the applied voltage up to a certain threshold; (d) after the bead leaving the upper surface, a sudden hitch up course would occur; (e), (f), and (g) with the amplitude further increasing, the bead continues rising, (h) the bead has been picked up away from the surface and manipulated in a certain height.

Image of FIG. 7.
FIG. 7.

The detail process of picking up an acid washed silica bead by using acoustic radiation force (enhanced online).. [URL: http://dx.doi.org/10.1063/1.3676636.1]10.1063/1.3676636.1

Image of FIG. 8.
FIG. 8.

The relationship of height and the voltage amplitude along with time increases during the procedure of picking up the silica bead.

Image of FIG. 9.
FIG. 9.

Procedure of picking up an acid washed zirconium bead adherent to the upper surface of the glass platform. (a) Similarly the zirconium bead adheres to the upper surface of the platform; (b) with the amplitude of the applied sinusoidal signal increasing, the bead moves towards left and then stops; (c) the bead is picked up away from the surface, when the applied voltage up to a certain threshold; (d) and (e) after the bead leaving the upper surface, a sudden hitch up course would occur; (f) and (g) with the amplitude further increasing, the bead continues rising, (h) the bead has been picked up away from the surface and manipulated in a certain height.

Image of FIG. 10.
FIG. 10.

The detail process of picking up an acid washed zirconium bead by using acoustic radiation force (enhanced online).. [URL: http://dx.doi.org/10.1063/1.3676636.2]10.1063/1.3676636.2

Image of FIG. 11.
FIG. 11.

The relationship of height and the voltage amplitude along with time increases during the procedure of picking up the zirconium bead.

Image of FIG. 12.
FIG. 12.

Procedures of picking up different particles. (a) SiO2 particle and (b) aluminum particle.

Image of FIG. 13.
FIG. 13.

The detail process of picking up (a) SiO2 particle (b) aluminum particle by using acoustic radiation force (enhanced online).. [URL: http://dx.doi.org/10.1063/1.3676636.3] [URL: http://dx.doi.org/10.1063/1.3676636.4]10.1063/1.3676636.310.1063/1.3676636.4

Image of FIG. 14.
FIG. 14.

The relationship of height and the voltage amplitude along with time increasing during the procedure of picking up (a) SiO2 particle (b) aluminum particle.

Tables

Generic image for table
Table I.

Characteristics of particles used in picking up experiments.

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/content/aip/journal/rsi/83/1/10.1063/1.3676636
2012-01-18
2014-04-25
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: A contactless methodology of picking up micro-particles from rigid surfaces by acoustic radiation force
http://aip.metastore.ingenta.com/content/aip/journal/rsi/83/1/10.1063/1.3676636
10.1063/1.3676636
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