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Far-field plasmonic resonance enhanced nanoparticle image velocimetry within a microchannel
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Image of FIG. 1.
FIG. 1.

Comparison of simulated light scattering spectra between silver and TiO nanoparticles at diameters of 20 nm in air and in water. These spectra are all simulated by software.

Image of FIG. 2.
FIG. 2.

Comparison of experimental and simulation results of silver nanoparticles.

Image of FIG. 3.
FIG. 3.

Comparison of simulated light scattering spectra among silver nanoparticles with different diameters in water.

Image of FIG. 4.
FIG. 4.

Morphologies of dry silver nanoparticles record by SEM. The bar represents 100 nm.

Image of FIG. 5.
FIG. 5.

The size distribution of silver nanoparticles measured by SEM.

Image of FIG. 6.
FIG. 6.

Size distribution of silver nanoparticles in solution measured by DLS.

Image of FIG. 7.
FIG. 7.

Dark field images of Ag nanoparticles illuminated by (a) a white light source. Exposure time for the camera is 4 ms. (b) A laser pulse at 532 nm, exposure time equals to the pulse duration of laser, which is about 10 ns. The bar is 2 m. The total dimension is 70 m × 55 m.

Image of FIG. 8.
FIG. 8.

(a) The diagram of nano-PIV setup used dark field illumination. (b) The schematics of the microchannel.

Image of FIG. 9.
FIG. 9.

Experimental measurement of nanoparticle movement in a microchannel using white light dark-field illumination. Image of nanoparticles at an exposure of 4 ms and instantaneous velocity map of the flow (in m/s). Flow speed is 0.01 ml/min.


Generic image for table
Table I.

Scattering cross sections of particles as a function of diameters off resonance.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Far-field plasmonic resonance enhanced nanoparticle image velocimetry within a microchannel