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Year: | 2007 | ||||
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Type of Publication: | Article | ||||||
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Journal: | Nano Letters | Volume: | 7 | ||||
Number: | 9 | Pages: | 2693-2700 | ||||
Month: | SEP 2007 | ||||||
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Note: | PT: J; TC: 30; UT: WOS:000249501900028 |
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Abstract: | Droplets of liquid drying on a surface with pinned contact area develop an internal hydrodynamic flow that carries entrained particles to the air-liquid-substrate interface. We use this phenomenon in cylindrical, micrometer-sized droplets of large aspect ratio (more than 1000:1) to align, position, and place individual anisotropic nanostructures such as single-walled carbon nanotubes (SWNT). More than 84% of SWNT are aligned in parallel within 50 relative to the target axis of alignment. A potential flow model accurately describes and quantifies the statistical variation in the positioning of the nanostructures. We demonstrate for the first time the top-down parallel alignment and placement of individual (unbundled) nanotubes from solution electrically contacted across gold electrodes. |
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