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Optofluidic extraction of particles using a sub-microfiber
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View: Figures


Image of FIG. 1.
FIG. 1.

Schematic of particle extraction mechanism. Upper right inset shows an optical microscope image of the microfluidic channel, while lower left inset shows the SEM image of the sub-microfiber with a defect decorated.

Image of FIG. 2.
FIG. 2.

Longitudinal cross-section views of three-dimensional numerical simulations. (a) Optical field energy distribution of a target 3-μm PS particle trapped on the defect. (b) Velocity field around the target 3-μm PS particle. F s, F g, and F d represent scattering, gradient, and drag forces, respectively, acting on the PS particle. (c) Optical field energy distribution around the 700-nm diameter sub-microfiber.

Image of FIG. 3.
FIG. 3.

The correlation of F g and fiber diameter at laser power P = 1 mW.

Image of FIG. 4.
FIG. 4.

(a)–(d) The deceleration of three PS particles in the trapping region at average fluid velocity v = 10 μm/s and laser power P = 0.4 mW. (e) The image of the trapping region on the microfluidic chip. (f) Two 3-μm PS particles aggregation were trapped on the 700-nm sub-microfiber with 700-nm PS particles dispersed around at P = 0.4 mW. (g) 3-μm PS particles began to accumulate at laser power P = 0.6 mW.

Image of FIG. 5.
FIG. 5.

(a) Trapped particle percentage vs laser power at average fluid velocity v = 10 μm/s and FOM. (b) Trapped particle percentage vs fluid velocity at laser power P = 0.6 mW and its FOM.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Optofluidic extraction of particles using a sub-microfiber