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A non-contact strategy for controlled enrichment, manipulation, and separation of carbon nanotubes by surface acoustic waves
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10.1063/1.4807677
/content/aip/journal/apl/102/21/10.1063/1.4807677
http://aip.metastore.ingenta.com/content/aip/journal/apl/102/21/10.1063/1.4807677
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Figures

Image of FIG. 1.
FIG. 1.

Schematic illustration of a microfluidic device with orthogonal pairs of IDTs for generating SAW. SAW field generated by driving IDTs at a resonance frequency can enrich and align CNTs to the substrate. The orthogonal standing SAW can manipulate the aligned CNTs to different positions with desired angle by adjusting two standing waves' phase and amplitude. The CNTs release when the SAW is turned off.

Image of FIG. 2.
FIG. 2.

(a) A photograph of the microfluidic device. The device consists of a single PDMS channel and two pairs of IDTs deposited on a 128°Y-cut LiNbO substrate. (b) CNTs suspension in the channel before SAW influence. (c) The CNTs are enriched to the substrate in the channel when SAW propagate into the channel. (d) The CNTs are patterned in the channel by SSAWs. Scale bar is 50 m.

Image of FIG. 3.
FIG. 3.

(a) The displacement of aggregated nanotubes corresponding to the phase φ. (b) The nanotube aggregation width is constant when acoustic intensity change. (c) Stacked images used to demonstrate a CNTs bundle rotating by adjusting wave phase and amplitude of the orthogonal SSAWs. Scale bar is 20 m.

Image of FIG. 4.
FIG. 4.

(a) Schematic illustration of the metallic SWNTs enriching experiment. (b) Raman spectra of SWNTs deposited by SAW on the substrate compared to a reference sample deposited on the substrate without SAW.

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/content/aip/journal/apl/102/21/10.1063/1.4807677
2013-05-28
2014-04-16
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: A non-contact strategy for controlled enrichment, manipulation, and separation of carbon nanotubes by surface acoustic waves
http://aip.metastore.ingenta.com/content/aip/journal/apl/102/21/10.1063/1.4807677
10.1063/1.4807677
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